Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 17634:5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
8027455: Improve symbol table scan times during gc pauses
Summary: Parallelize string table and symbol table scan during remark and full GC. Some additional statistics output if the experimental flag G1TraceStringSymbolTableScrubbing is set.
Reviewed-by: mgerdin, coleenp, brutisso
author | tschatzl |
---|---|
date | Mon, 20 Jan 2014 11:47:07 +0100 |
parents | 1de8e5356754 |
children | a2866d45e99e |
rev | line source |
---|---|
342 | 1 /* |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/symbolTable.hpp" | |
3771 | 27 #include "gc_implementation/g1/concurrentMark.inline.hpp" |
1972 | 28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" |
29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
30 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3867
diff
changeset
|
31 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
32 #include "gc_implementation/g1/g1Log.hpp" |
3771 | 33 #include "gc_implementation/g1/g1OopClosures.inline.hpp" |
1972 | 34 #include "gc_implementation/g1/g1RemSet.hpp" |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
35 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 36 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
37 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
38 #include "gc_implementation/shared/vmGCOperations.hpp" |
10405 | 39 #include "gc_implementation/shared/gcTimer.hpp" |
40 #include "gc_implementation/shared/gcTrace.hpp" | |
41 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 42 #include "memory/genOopClosures.inline.hpp" |
43 #include "memory/referencePolicy.hpp" | |
44 #include "memory/resourceArea.hpp" | |
45 #include "oops/oop.inline.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/java.hpp" | |
6197 | 48 #include "services/memTracker.hpp" |
342 | 49 |
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
50 // Concurrent marking bit map wrapper |
342 | 51 |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
52 CMBitMapRO::CMBitMapRO(int shifter) : |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
53 _bm(), |
342 | 54 _shifter(shifter) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
55 _bmStartWord = 0; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
56 _bmWordSize = 0; |
342 | 57 } |
58 | |
59 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr, | |
60 HeapWord* limit) const { | |
61 // First we must round addr *up* to a possible object boundary. | |
62 addr = (HeapWord*)align_size_up((intptr_t)addr, | |
63 HeapWordSize << _shifter); | |
64 size_t addrOffset = heapWordToOffset(addr); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
65 if (limit == NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
66 limit = _bmStartWord + _bmWordSize; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
67 } |
342 | 68 size_t limitOffset = heapWordToOffset(limit); |
69 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset); | |
70 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
71 assert(nextAddr >= addr, "get_next_one postcondition"); | |
72 assert(nextAddr == limit || isMarked(nextAddr), | |
73 "get_next_one postcondition"); | |
74 return nextAddr; | |
75 } | |
76 | |
77 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr, | |
78 HeapWord* limit) const { | |
79 size_t addrOffset = heapWordToOffset(addr); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
80 if (limit == NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
81 limit = _bmStartWord + _bmWordSize; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
82 } |
342 | 83 size_t limitOffset = heapWordToOffset(limit); |
84 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset); | |
85 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
86 assert(nextAddr >= addr, "get_next_one postcondition"); | |
87 assert(nextAddr == limit || !isMarked(nextAddr), | |
88 "get_next_one postcondition"); | |
89 return nextAddr; | |
90 } | |
91 | |
92 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const { | |
93 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check"); | |
94 return (int) (diff >> _shifter); | |
95 } | |
96 | |
97 #ifndef PRODUCT | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
98 bool CMBitMapRO::covers(ReservedSpace heap_rs) const { |
342 | 99 // assert(_bm.map() == _virtual_space.low(), "map inconsistency"); |
6750
859cd1a76f8a
7197906: BlockOffsetArray::power_to_cards_back() needs to handle > 32 bit shifts
brutisso
parents:
6725
diff
changeset
|
100 assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize, |
342 | 101 "size inconsistency"); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
102 return _bmStartWord == (HeapWord*)(heap_rs.base()) && |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
103 _bmWordSize == heap_rs.size()>>LogHeapWordSize; |
342 | 104 } |
105 #endif | |
106 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
107 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
108 _bm.print_on_error(st, prefix); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
109 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
110 |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
111 bool CMBitMap::allocate(ReservedSpace heap_rs) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
112 _bmStartWord = (HeapWord*)(heap_rs.base()); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
113 _bmWordSize = heap_rs.size()/HeapWordSize; // heap_rs.size() is in bytes |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
114 ReservedSpace brs(ReservedSpace::allocation_align_size_up( |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
115 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1)); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
116 if (!brs.is_reserved()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
117 warning("ConcurrentMark marking bit map allocation failure"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
118 return false; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
119 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
120 MemTracker::record_virtual_memory_type((address)brs.base(), mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
121 // For now we'll just commit all of the bit map up front. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
122 // Later on we'll try to be more parsimonious with swap. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
123 if (!_virtual_space.initialize(brs, brs.size())) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
124 warning("ConcurrentMark marking bit map backing store failure"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
125 return false; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
126 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
127 assert(_virtual_space.committed_size() == brs.size(), |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
128 "didn't reserve backing store for all of concurrent marking bit map?"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
129 _bm.set_map((uintptr_t*)_virtual_space.low()); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
130 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >= |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
131 _bmWordSize, "inconsistency in bit map sizing"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
132 _bm.set_size(_bmWordSize >> _shifter); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
133 return true; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
134 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
135 |
342 | 136 void CMBitMap::clearAll() { |
137 _bm.clear(); | |
138 return; | |
139 } | |
140 | |
141 void CMBitMap::markRange(MemRegion mr) { | |
142 mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); | |
143 assert(!mr.is_empty(), "unexpected empty region"); | |
144 assert((offsetToHeapWord(heapWordToOffset(mr.end())) == | |
145 ((HeapWord *) mr.end())), | |
146 "markRange memory region end is not card aligned"); | |
147 // convert address range into offset range | |
148 _bm.at_put_range(heapWordToOffset(mr.start()), | |
149 heapWordToOffset(mr.end()), true); | |
150 } | |
151 | |
152 void CMBitMap::clearRange(MemRegion mr) { | |
153 mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); | |
154 assert(!mr.is_empty(), "unexpected empty region"); | |
155 // convert address range into offset range | |
156 _bm.at_put_range(heapWordToOffset(mr.start()), | |
157 heapWordToOffset(mr.end()), false); | |
158 } | |
159 | |
160 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr, | |
161 HeapWord* end_addr) { | |
162 HeapWord* start = getNextMarkedWordAddress(addr); | |
163 start = MIN2(start, end_addr); | |
164 HeapWord* end = getNextUnmarkedWordAddress(start); | |
165 end = MIN2(end, end_addr); | |
166 assert(start <= end, "Consistency check"); | |
167 MemRegion mr(start, end); | |
168 if (!mr.is_empty()) { | |
169 clearRange(mr); | |
170 } | |
171 return mr; | |
172 } | |
173 | |
174 CMMarkStack::CMMarkStack(ConcurrentMark* cm) : | |
175 _base(NULL), _cm(cm) | |
176 #ifdef ASSERT | |
177 , _drain_in_progress(false) | |
178 , _drain_in_progress_yields(false) | |
179 #endif | |
180 {} | |
181 | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
182 bool CMMarkStack::allocate(size_t capacity) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
183 // allocate a stack of the requisite depth |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
184 ReservedSpace rs(ReservedSpace::allocation_align_size_up(capacity * sizeof(oop))); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
185 if (!rs.is_reserved()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
186 warning("ConcurrentMark MarkStack allocation failure"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
187 return false; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
188 } |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
189 MemTracker::record_virtual_memory_type((address)rs.base(), mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
190 if (!_virtual_space.initialize(rs, rs.size())) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
191 warning("ConcurrentMark MarkStack backing store failure"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
192 // Release the virtual memory reserved for the marking stack |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
193 rs.release(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
194 return false; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
195 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
196 assert(_virtual_space.committed_size() == rs.size(), |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
197 "Didn't reserve backing store for all of ConcurrentMark stack?"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
198 _base = (oop*) _virtual_space.low(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
199 setEmpty(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
200 _capacity = (jint) capacity; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
201 _saved_index = -1; |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
202 _should_expand = false; |
342 | 203 NOT_PRODUCT(_max_depth = 0); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
204 return true; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
205 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
206 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
207 void CMMarkStack::expand() { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
208 // Called, during remark, if we've overflown the marking stack during marking. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
209 assert(isEmpty(), "stack should been emptied while handling overflow"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
210 assert(_capacity <= (jint) MarkStackSizeMax, "stack bigger than permitted"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
211 // Clear expansion flag |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
212 _should_expand = false; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
213 if (_capacity == (jint) MarkStackSizeMax) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
214 if (PrintGCDetails && Verbose) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
215 gclog_or_tty->print_cr(" (benign) Can't expand marking stack capacity, at max size limit"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
216 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
217 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
218 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
219 // Double capacity if possible |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
220 jint new_capacity = MIN2(_capacity*2, (jint) MarkStackSizeMax); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
221 // Do not give up existing stack until we have managed to |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
222 // get the double capacity that we desired. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
223 ReservedSpace rs(ReservedSpace::allocation_align_size_up(new_capacity * |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
224 sizeof(oop))); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
225 if (rs.is_reserved()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
226 // Release the backing store associated with old stack |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
227 _virtual_space.release(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
228 // Reinitialize virtual space for new stack |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
229 if (!_virtual_space.initialize(rs, rs.size())) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
230 fatal("Not enough swap for expanded marking stack capacity"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
231 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
232 _base = (oop*)(_virtual_space.low()); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
233 _index = 0; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
234 _capacity = new_capacity; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
235 } else { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
236 if (PrintGCDetails && Verbose) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
237 // Failed to double capacity, continue; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
238 gclog_or_tty->print(" (benign) Failed to expand marking stack capacity from " |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
239 SIZE_FORMAT"K to " SIZE_FORMAT"K", |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
240 _capacity / K, new_capacity / K); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
241 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
242 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
243 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
244 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
245 void CMMarkStack::set_should_expand() { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
246 // If we're resetting the marking state because of an |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
247 // marking stack overflow, record that we should, if |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
248 // possible, expand the stack. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
249 _should_expand = _cm->has_overflown(); |
342 | 250 } |
251 | |
252 CMMarkStack::~CMMarkStack() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
253 if (_base != NULL) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
254 _base = NULL; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
255 _virtual_space.release(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
256 } |
342 | 257 } |
258 | |
259 void CMMarkStack::par_push(oop ptr) { | |
260 while (true) { | |
261 if (isFull()) { | |
262 _overflow = true; | |
263 return; | |
264 } | |
265 // Otherwise... | |
266 jint index = _index; | |
267 jint next_index = index+1; | |
268 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
269 if (res == index) { | |
270 _base[index] = ptr; | |
271 // Note that we don't maintain this atomically. We could, but it | |
272 // doesn't seem necessary. | |
273 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
274 return; | |
275 } | |
276 // Otherwise, we need to try again. | |
277 } | |
278 } | |
279 | |
280 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) { | |
281 while (true) { | |
282 if (isFull()) { | |
283 _overflow = true; | |
284 return; | |
285 } | |
286 // Otherwise... | |
287 jint index = _index; | |
288 jint next_index = index + n; | |
289 if (next_index > _capacity) { | |
290 _overflow = true; | |
291 return; | |
292 } | |
293 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
294 if (res == index) { | |
295 for (int i = 0; i < n; i++) { | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
296 int ind = index + i; |
342 | 297 assert(ind < _capacity, "By overflow test above."); |
298 _base[ind] = ptr_arr[i]; | |
299 } | |
300 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
301 return; | |
302 } | |
303 // Otherwise, we need to try again. | |
304 } | |
305 } | |
306 | |
307 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) { | |
308 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
309 jint start = _index; | |
310 jint next_index = start + n; | |
311 if (next_index > _capacity) { | |
312 _overflow = true; | |
313 return; | |
314 } | |
315 // Otherwise. | |
316 _index = next_index; | |
317 for (int i = 0; i < n; i++) { | |
318 int ind = start + i; | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
319 assert(ind < _capacity, "By overflow test above."); |
342 | 320 _base[ind] = ptr_arr[i]; |
321 } | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
322 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); |
342 | 323 } |
324 | |
325 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) { | |
326 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
327 jint index = _index; | |
328 if (index == 0) { | |
329 *n = 0; | |
330 return false; | |
331 } else { | |
332 int k = MIN2(max, index); | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
333 jint new_ind = index - k; |
342 | 334 for (int j = 0; j < k; j++) { |
335 ptr_arr[j] = _base[new_ind + j]; | |
336 } | |
337 _index = new_ind; | |
338 *n = k; | |
339 return true; | |
340 } | |
341 } | |
342 | |
343 template<class OopClosureClass> | |
344 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) { | |
345 assert(!_drain_in_progress || !_drain_in_progress_yields || yield_after | |
346 || SafepointSynchronize::is_at_safepoint(), | |
347 "Drain recursion must be yield-safe."); | |
348 bool res = true; | |
349 debug_only(_drain_in_progress = true); | |
350 debug_only(_drain_in_progress_yields = yield_after); | |
351 while (!isEmpty()) { | |
352 oop newOop = pop(); | |
353 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop"); | |
354 assert(newOop->is_oop(), "Expected an oop"); | |
355 assert(bm == NULL || bm->isMarked((HeapWord*)newOop), | |
356 "only grey objects on this stack"); | |
357 newOop->oop_iterate(cl); | |
358 if (yield_after && _cm->do_yield_check()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
359 res = false; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
360 break; |
342 | 361 } |
362 } | |
363 debug_only(_drain_in_progress = false); | |
364 return res; | |
365 } | |
366 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
367 void CMMarkStack::note_start_of_gc() { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
368 assert(_saved_index == -1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
369 "note_start_of_gc()/end_of_gc() bracketed incorrectly"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
370 _saved_index = _index; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
371 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
372 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
373 void CMMarkStack::note_end_of_gc() { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
374 // This is intentionally a guarantee, instead of an assert. If we |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
375 // accidentally add something to the mark stack during GC, it |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
376 // will be a correctness issue so it's better if we crash. we'll |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
377 // only check this once per GC anyway, so it won't be a performance |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
378 // issue in any way. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
379 guarantee(_saved_index == _index, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
380 err_msg("saved index: %d index: %d", _saved_index, _index)); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
381 _saved_index = -1; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
382 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
383 |
342 | 384 void CMMarkStack::oops_do(OopClosure* f) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
385 assert(_saved_index == _index, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
386 err_msg("saved index: %d index: %d", _saved_index, _index)); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
387 for (int i = 0; i < _index; i += 1) { |
342 | 388 f->do_oop(&_base[i]); |
389 } | |
390 } | |
391 | |
392 bool ConcurrentMark::not_yet_marked(oop obj) const { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
393 return _g1h->is_obj_ill(obj); |
342 | 394 } |
395 | |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
396 CMRootRegions::CMRootRegions() : |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
397 _young_list(NULL), _cm(NULL), _scan_in_progress(false), |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
398 _should_abort(false), _next_survivor(NULL) { } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
399 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
400 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
401 _young_list = g1h->young_list(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
402 _cm = cm; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
403 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
404 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
405 void CMRootRegions::prepare_for_scan() { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
406 assert(!scan_in_progress(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
407 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
408 // Currently, only survivors can be root regions. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
409 assert(_next_survivor == NULL, "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
410 _next_survivor = _young_list->first_survivor_region(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
411 _scan_in_progress = (_next_survivor != NULL); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
412 _should_abort = false; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
413 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
414 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
415 HeapRegion* CMRootRegions::claim_next() { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
416 if (_should_abort) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
417 // If someone has set the should_abort flag, we return NULL to |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
418 // force the caller to bail out of their loop. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
419 return NULL; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
420 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
421 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
422 // Currently, only survivors can be root regions. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
423 HeapRegion* res = _next_survivor; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
424 if (res != NULL) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
425 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
426 // Read it again in case it changed while we were waiting for the lock. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
427 res = _next_survivor; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
428 if (res != NULL) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
429 if (res == _young_list->last_survivor_region()) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
430 // We just claimed the last survivor so store NULL to indicate |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
431 // that we're done. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
432 _next_survivor = NULL; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
433 } else { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
434 _next_survivor = res->get_next_young_region(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
435 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
436 } else { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
437 // Someone else claimed the last survivor while we were trying |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
438 // to take the lock so nothing else to do. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
439 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
440 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
441 assert(res == NULL || res->is_survivor(), "post-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
442 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
443 return res; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
444 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
445 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
446 void CMRootRegions::scan_finished() { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
447 assert(scan_in_progress(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
448 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
449 // Currently, only survivors can be root regions. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
450 if (!_should_abort) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
451 assert(_next_survivor == NULL, "we should have claimed all survivors"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
452 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
453 _next_survivor = NULL; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
454 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
455 { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
456 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
457 _scan_in_progress = false; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
458 RootRegionScan_lock->notify_all(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
459 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
460 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
461 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
462 bool CMRootRegions::wait_until_scan_finished() { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
463 if (!scan_in_progress()) return false; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
464 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
465 { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
466 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
467 while (scan_in_progress()) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
468 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
469 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
470 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
471 return true; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
472 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
473 |
342 | 474 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
475 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
476 #endif // _MSC_VER | |
477 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
478 uint ConcurrentMark::scale_parallel_threads(uint n_par_threads) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
479 return MAX2((n_par_threads + 2) / 4, 1U); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
480 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
481 |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
482 ConcurrentMark::ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs) : |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
483 _g1h(g1h), |
12229
ff218fdb30ba
8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs
tschatzl
parents:
12080
diff
changeset
|
484 _markBitMap1(log2_intptr(MinObjAlignment)), |
ff218fdb30ba
8021823: G1: Concurrent marking crashes with -XX:ObjectAlignmentInBytes>=32 in 64bit VMs
tschatzl
parents:
12080
diff
changeset
|
485 _markBitMap2(log2_intptr(MinObjAlignment)), |
342 | 486 _parallel_marking_threads(0), |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
487 _max_parallel_marking_threads(0), |
342 | 488 _sleep_factor(0.0), |
489 _marking_task_overhead(1.0), | |
490 _cleanup_sleep_factor(0.0), | |
491 _cleanup_task_overhead(1.0), | |
2152 | 492 _cleanup_list("Cleanup List"), |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
493 _region_bm((BitMap::idx_t)(g1h->max_regions()), false /* in_resource_area*/), |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
494 _card_bm((heap_rs.size() + CardTableModRefBS::card_size - 1) >> |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
495 CardTableModRefBS::card_shift, |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
496 false /* in_resource_area*/), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
497 |
342 | 498 _prevMarkBitMap(&_markBitMap1), |
499 _nextMarkBitMap(&_markBitMap2), | |
500 | |
501 _markStack(this), | |
502 // _finger set in set_non_marking_state | |
503 | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
504 _max_worker_id(MAX2((uint)ParallelGCThreads, 1U)), |
342 | 505 // _active_tasks set in set_non_marking_state |
506 // _tasks set inside the constructor | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
507 _task_queues(new CMTaskQueueSet((int) _max_worker_id)), |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
508 _terminator(ParallelTaskTerminator((int) _max_worker_id, _task_queues)), |
342 | 509 |
510 _has_overflown(false), | |
511 _concurrent(false), | |
619
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
512 _has_aborted(false), |
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
513 _restart_for_overflow(false), |
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
514 _concurrent_marking_in_progress(false), |
342 | 515 |
516 // _verbose_level set below | |
517 | |
518 _init_times(), | |
519 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(), | |
520 _cleanup_times(), | |
521 _total_counting_time(0.0), | |
522 _total_rs_scrub_time(0.0), | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
523 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
524 _parallel_workers(NULL), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
525 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
526 _count_card_bitmaps(NULL), |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
527 _count_marked_bytes(NULL), |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
528 _completed_initialization(false) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
529 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
530 if (verbose_level < no_verbose) { |
342 | 531 verbose_level = no_verbose; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
532 } |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
533 if (verbose_level > high_verbose) { |
342 | 534 verbose_level = high_verbose; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
535 } |
342 | 536 _verbose_level = verbose_level; |
537 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
538 if (verbose_low()) { |
342 | 539 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", " |
540 "heap end = "PTR_FORMAT, _heap_start, _heap_end); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
541 } |
342 | 542 |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
543 if (!_markBitMap1.allocate(heap_rs)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
544 warning("Failed to allocate first CM bit map"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
545 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
546 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
547 if (!_markBitMap2.allocate(heap_rs)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
548 warning("Failed to allocate second CM bit map"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
549 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
550 } |
342 | 551 |
552 // Create & start a ConcurrentMark thread. | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
553 _cmThread = new ConcurrentMarkThread(this); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
554 assert(cmThread() != NULL, "CM Thread should have been created"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
555 assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm"); |
13437
1de8e5356754
8029326: G1 does not check if threads gets created
ehelin
parents:
12316
diff
changeset
|
556 if (_cmThread->osthread() == NULL) { |
1de8e5356754
8029326: G1 does not check if threads gets created
ehelin
parents:
12316
diff
changeset
|
557 vm_shutdown_during_initialization("Could not create ConcurrentMarkThread"); |
1de8e5356754
8029326: G1 does not check if threads gets created
ehelin
parents:
12316
diff
changeset
|
558 } |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
559 |
342 | 560 assert(CGC_lock != NULL, "Where's the CGC_lock?"); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
561 assert(_markBitMap1.covers(heap_rs), "_markBitMap1 inconsistency"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
562 assert(_markBitMap2.covers(heap_rs), "_markBitMap2 inconsistency"); |
342 | 563 |
564 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); | |
1282 | 565 satb_qs.set_buffer_size(G1SATBBufferSize); |
342 | 566 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
567 _root_regions.init(_g1h, this); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
568 |
1284 | 569 if (ConcGCThreads > ParallelGCThreads) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
570 warning("Can't have more ConcGCThreads (" UINT32_FORMAT ") " |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
571 "than ParallelGCThreads (" UINT32_FORMAT ").", |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
572 ConcGCThreads, ParallelGCThreads); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
573 return; |
342 | 574 } |
575 if (ParallelGCThreads == 0) { | |
576 // if we are not running with any parallel GC threads we will not | |
577 // spawn any marking threads either | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
578 _parallel_marking_threads = 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
579 _max_parallel_marking_threads = 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
580 _sleep_factor = 0.0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
581 _marking_task_overhead = 1.0; |
342 | 582 } else { |
8006
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
583 if (!FLAG_IS_DEFAULT(ConcGCThreads) && ConcGCThreads > 0) { |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
584 // Note: ConcGCThreads has precedence over G1MarkingOverheadPercent |
342 | 585 // if both are set |
586 _sleep_factor = 0.0; | |
587 _marking_task_overhead = 1.0; | |
751 | 588 } else if (G1MarkingOverheadPercent > 0) { |
8006
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
589 // We will calculate the number of parallel marking threads based |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
590 // on a target overhead with respect to the soft real-time goal |
751 | 591 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0; |
342 | 592 double overall_cm_overhead = |
751 | 593 (double) MaxGCPauseMillis * marking_overhead / |
594 (double) GCPauseIntervalMillis; | |
342 | 595 double cpu_ratio = 1.0 / (double) os::processor_count(); |
596 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio); | |
597 double marking_task_overhead = | |
598 overall_cm_overhead / marking_thread_num * | |
599 (double) os::processor_count(); | |
600 double sleep_factor = | |
601 (1.0 - marking_task_overhead) / marking_task_overhead; | |
602 | |
8006
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
603 FLAG_SET_ERGO(uintx, ConcGCThreads, (uint) marking_thread_num); |
342 | 604 _sleep_factor = sleep_factor; |
605 _marking_task_overhead = marking_task_overhead; | |
606 } else { | |
8006
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
607 // Calculate the number of parallel marking threads by scaling |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
608 // the number of parallel GC threads. |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
609 uint marking_thread_num = scale_parallel_threads((uint) ParallelGCThreads); |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
610 FLAG_SET_ERGO(uintx, ConcGCThreads, marking_thread_num); |
342 | 611 _sleep_factor = 0.0; |
612 _marking_task_overhead = 1.0; | |
613 } | |
614 | |
8006
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
615 assert(ConcGCThreads > 0, "Should have been set"); |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
616 _parallel_marking_threads = (uint) ConcGCThreads; |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
617 _max_parallel_marking_threads = _parallel_marking_threads; |
4700e77d44c1
8006894: G1: Number of marking threads missing from PrintFlagsFinal output
johnc
parents:
7450
diff
changeset
|
618 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
619 if (parallel_marking_threads() > 1) { |
342 | 620 _cleanup_task_overhead = 1.0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
621 } else { |
342 | 622 _cleanup_task_overhead = marking_task_overhead(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
623 } |
342 | 624 _cleanup_sleep_factor = |
625 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead(); | |
626 | |
627 #if 0 | |
628 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads()); | |
629 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead()); | |
630 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor()); | |
631 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead()); | |
632 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor()); | |
633 #endif | |
634 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
635 guarantee(parallel_marking_threads() > 0, "peace of mind"); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
636 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads", |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
637 _max_parallel_marking_threads, false, true); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
638 if (_parallel_workers == NULL) { |
342 | 639 vm_exit_during_initialization("Failed necessary allocation."); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
640 } else { |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
641 _parallel_workers->initialize_workers(); |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
642 } |
342 | 643 } |
644 | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
645 if (FLAG_IS_DEFAULT(MarkStackSize)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
646 uintx mark_stack_size = |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
647 MIN2(MarkStackSizeMax, |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
648 MAX2(MarkStackSize, (uintx) (parallel_marking_threads() * TASKQUEUE_SIZE))); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
649 // Verify that the calculated value for MarkStackSize is in range. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
650 // It would be nice to use the private utility routine from Arguments. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
651 if (!(mark_stack_size >= 1 && mark_stack_size <= MarkStackSizeMax)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
652 warning("Invalid value calculated for MarkStackSize (" UINTX_FORMAT "): " |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
653 "must be between " UINTX_FORMAT " and " UINTX_FORMAT, |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
654 mark_stack_size, 1, MarkStackSizeMax); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
655 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
656 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
657 FLAG_SET_ERGO(uintx, MarkStackSize, mark_stack_size); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
658 } else { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
659 // Verify MarkStackSize is in range. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
660 if (FLAG_IS_CMDLINE(MarkStackSize)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
661 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
662 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
663 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT "): " |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
664 "must be between " UINTX_FORMAT " and " UINTX_FORMAT, |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
665 MarkStackSize, 1, MarkStackSizeMax); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
666 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
667 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
668 } else if (FLAG_IS_CMDLINE(MarkStackSizeMax)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
669 if (!(MarkStackSize >= 1 && MarkStackSize <= MarkStackSizeMax)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
670 warning("Invalid value specified for MarkStackSize (" UINTX_FORMAT ")" |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
671 " or for MarkStackSizeMax (" UINTX_FORMAT ")", |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
672 MarkStackSize, MarkStackSizeMax); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
673 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
674 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
675 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
676 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
677 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
678 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
679 if (!_markStack.allocate(MarkStackSize)) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
680 warning("Failed to allocate CM marking stack"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
681 return; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
682 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
683 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
684 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_worker_id, mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
685 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_worker_id, mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
686 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
687 _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_worker_id, mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
688 _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_worker_id, mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
689 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
690 BitMap::idx_t card_bm_size = _card_bm.size(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
691 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
692 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
693 _active_tasks = _max_worker_id; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
694 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
695 size_t max_regions = (size_t) _g1h->max_regions(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
696 for (uint i = 0; i < _max_worker_id; ++i) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
697 CMTaskQueue* task_queue = new CMTaskQueue(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
698 task_queue->initialize(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
699 _task_queues->register_queue(i, task_queue); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
700 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
701 _count_card_bitmaps[i] = BitMap(card_bm_size, false); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
702 _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, max_regions, mtGC); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
703 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
704 _tasks[i] = new CMTask(i, this, |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
705 _count_marked_bytes[i], |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
706 &_count_card_bitmaps[i], |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
707 task_queue, _task_queues); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
708 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
709 _accum_task_vtime[i] = 0.0; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
710 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
711 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
712 // Calculate the card number for the bottom of the heap. Used |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
713 // in biasing indexes into the accounting card bitmaps. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
714 _heap_bottom_card_num = |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
715 intptr_t(uintptr_t(_g1h->reserved_region().start()) >> |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
716 CardTableModRefBS::card_shift); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
717 |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
718 // Clear all the liveness counting data |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
719 clear_all_count_data(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
720 |
342 | 721 // so that the call below can read a sensible value |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
722 _heap_start = (HeapWord*) heap_rs.base(); |
342 | 723 set_non_marking_state(); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
724 _completed_initialization = true; |
342 | 725 } |
726 | |
727 void ConcurrentMark::update_g1_committed(bool force) { | |
728 // If concurrent marking is not in progress, then we do not need to | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
729 // update _heap_end. |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
730 if (!concurrent_marking_in_progress() && !force) return; |
342 | 731 |
732 MemRegion committed = _g1h->g1_committed(); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
733 assert(committed.start() == _heap_start, "start shouldn't change"); |
342 | 734 HeapWord* new_end = committed.end(); |
735 if (new_end > _heap_end) { | |
736 // The heap has been expanded. | |
737 | |
738 _heap_end = new_end; | |
739 } | |
740 // Notice that the heap can also shrink. However, this only happens | |
741 // during a Full GC (at least currently) and the entire marking | |
742 // phase will bail out and the task will not be restarted. So, let's | |
743 // do nothing. | |
744 } | |
745 | |
746 void ConcurrentMark::reset() { | |
747 // Starting values for these two. This should be called in a STW | |
748 // phase. CM will be notified of any future g1_committed expansions | |
749 // will be at the end of evacuation pauses, when tasks are | |
750 // inactive. | |
751 MemRegion committed = _g1h->g1_committed(); | |
752 _heap_start = committed.start(); | |
753 _heap_end = committed.end(); | |
754 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
755 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
756 assert(_heap_start != NULL, "heap bounds should look ok"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
757 assert(_heap_end != NULL, "heap bounds should look ok"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
758 assert(_heap_start < _heap_end, "heap bounds should look ok"); |
342 | 759 |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
760 // Reset all the marking data structures and any necessary flags |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
761 reset_marking_state(); |
342 | 762 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
763 if (verbose_low()) { |
342 | 764 gclog_or_tty->print_cr("[global] resetting"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
765 } |
342 | 766 |
767 // We do reset all of them, since different phases will use | |
768 // different number of active threads. So, it's easiest to have all | |
769 // of them ready. | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
770 for (uint i = 0; i < _max_worker_id; ++i) { |
342 | 771 _tasks[i]->reset(_nextMarkBitMap); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
772 } |
342 | 773 |
774 // we need this to make sure that the flag is on during the evac | |
775 // pause with initial mark piggy-backed | |
776 set_concurrent_marking_in_progress(); | |
777 } | |
778 | |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
779 |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
780 void ConcurrentMark::reset_marking_state(bool clear_overflow) { |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
781 _markStack.set_should_expand(); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
782 _markStack.setEmpty(); // Also clears the _markStack overflow flag |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
783 if (clear_overflow) { |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
784 clear_has_overflown(); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
785 } else { |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
786 assert(has_overflown(), "pre-condition"); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
787 } |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
788 _finger = _heap_start; |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
789 |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
790 for (uint i = 0; i < _max_worker_id; ++i) { |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
791 CMTaskQueue* queue = _task_queues->queue(i); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
792 queue->set_empty(); |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
793 } |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
794 } |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
795 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
796 void ConcurrentMark::set_concurrency(uint active_tasks) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
797 assert(active_tasks <= _max_worker_id, "we should not have more"); |
342 | 798 |
799 _active_tasks = active_tasks; | |
800 // Need to update the three data structures below according to the | |
801 // number of active threads for this phase. | |
802 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues); | |
803 _first_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
804 _second_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
805 } |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
806 |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
807 void ConcurrentMark::set_concurrency_and_phase(uint active_tasks, bool concurrent) { |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
808 set_concurrency(active_tasks); |
342 | 809 |
810 _concurrent = concurrent; | |
811 // We propagate this to all tasks, not just the active ones. | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
812 for (uint i = 0; i < _max_worker_id; ++i) |
342 | 813 _tasks[i]->set_concurrent(concurrent); |
814 | |
815 if (concurrent) { | |
816 set_concurrent_marking_in_progress(); | |
817 } else { | |
818 // We currently assume that the concurrent flag has been set to | |
819 // false before we start remark. At this point we should also be | |
820 // in a STW phase. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
821 assert(!concurrent_marking_in_progress(), "invariant"); |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
822 assert(_finger == _heap_end, |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
823 err_msg("only way to get here: _finger: "PTR_FORMAT", _heap_end: "PTR_FORMAT, |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
824 _finger, _heap_end)); |
342 | 825 update_g1_committed(true); |
826 } | |
827 } | |
828 | |
829 void ConcurrentMark::set_non_marking_state() { | |
830 // We set the global marking state to some default values when we're | |
831 // not doing marking. | |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
832 reset_marking_state(); |
342 | 833 _active_tasks = 0; |
834 clear_concurrent_marking_in_progress(); | |
835 } | |
836 | |
837 ConcurrentMark::~ConcurrentMark() { | |
4735 | 838 // The ConcurrentMark instance is never freed. |
839 ShouldNotReachHere(); | |
342 | 840 } |
841 | |
842 void ConcurrentMark::clearNextBitmap() { | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
843 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
844 G1CollectorPolicy* g1p = g1h->g1_policy(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
845 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
846 // Make sure that the concurrent mark thread looks to still be in |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
847 // the current cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
848 guarantee(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
849 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
850 // We are finishing up the current cycle by clearing the next |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
851 // marking bitmap and getting it ready for the next cycle. During |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
852 // this time no other cycle can start. So, let's make sure that this |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
853 // is the case. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
854 guarantee(!g1h->mark_in_progress(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
855 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
856 // clear the mark bitmap (no grey objects to start with). |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
857 // We need to do this in chunks and offer to yield in between |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
858 // each chunk. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
859 HeapWord* start = _nextMarkBitMap->startWord(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
860 HeapWord* end = _nextMarkBitMap->endWord(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
861 HeapWord* cur = start; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
862 size_t chunkSize = M; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
863 while (cur < end) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
864 HeapWord* next = cur + chunkSize; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
865 if (next > end) { |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
866 next = end; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
867 } |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
868 MemRegion mr(cur,next); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
869 _nextMarkBitMap->clearRange(mr); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
870 cur = next; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
871 do_yield_check(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
872 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
873 // Repeat the asserts from above. We'll do them as asserts here to |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
874 // minimize their overhead on the product. However, we'll have |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
875 // them as guarantees at the beginning / end of the bitmap |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
876 // clearing to get some checking in the product. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
877 assert(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
878 assert(!g1h->mark_in_progress(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
879 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
880 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
881 // Clear the liveness counting data |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
882 clear_all_count_data(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
883 |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
884 // Repeat the asserts from above. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
885 guarantee(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
886 guarantee(!g1h->mark_in_progress(), "invariant"); |
342 | 887 } |
888 | |
889 class NoteStartOfMarkHRClosure: public HeapRegionClosure { | |
890 public: | |
891 bool doHeapRegion(HeapRegion* r) { | |
892 if (!r->continuesHumongous()) { | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
893 r->note_start_of_marking(); |
342 | 894 } |
895 return false; | |
896 } | |
897 }; | |
898 | |
899 void ConcurrentMark::checkpointRootsInitialPre() { | |
900 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
901 G1CollectorPolicy* g1p = g1h->g1_policy(); | |
902 | |
903 _has_aborted = false; | |
904 | |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
905 #ifndef PRODUCT |
1044 | 906 if (G1PrintReachableAtInitialMark) { |
1388 | 907 print_reachable("at-cycle-start", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
908 VerifyOption_G1UsePrevMarking, true /* all */); |
1044 | 909 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
910 #endif |
342 | 911 |
912 // Initialise marking structures. This has to be done in a STW phase. | |
913 reset(); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
914 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
915 // For each region note start of marking. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
916 NoteStartOfMarkHRClosure startcl; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
917 g1h->heap_region_iterate(&startcl); |
342 | 918 } |
919 | |
920 | |
921 void ConcurrentMark::checkpointRootsInitialPost() { | |
922 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
923 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
924 // If we force an overflow during remark, the remark operation will |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
925 // actually abort and we'll restart concurrent marking. If we always |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
926 // force an oveflow during remark we'll never actually complete the |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
927 // marking phase. So, we initilize this here, at the start of the |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
928 // cycle, so that at the remaining overflow number will decrease at |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
929 // every remark and we'll eventually not need to cause one. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
930 force_overflow_stw()->init(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
931 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
932 // Start Concurrent Marking weak-reference discovery. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
933 ReferenceProcessor* rp = g1h->ref_processor_cm(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
934 // enable ("weak") refs discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
935 rp->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
457
27a80744a83b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
453
diff
changeset
|
936 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle |
342 | 937 |
938 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
939 // This is the start of the marking cycle, we're expected all |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
940 // threads to have SATB queues with active set to false. |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
941 satb_mq_set.set_active_all_threads(true, /* new active value */ |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
942 false /* expected_active */); |
342 | 943 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
944 _root_regions.prepare_for_scan(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
945 |
342 | 946 // update_g1_committed() will be called at the end of an evac pause |
947 // when marking is on. So, it's also called at the end of the | |
948 // initial-mark pause to update the heap end, if the heap expands | |
949 // during it. No need to call it here. | |
950 } | |
951 | |
952 /* | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
953 * Notice that in the next two methods, we actually leave the STS |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
954 * during the barrier sync and join it immediately afterwards. If we |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
955 * do not do this, the following deadlock can occur: one thread could |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
956 * be in the barrier sync code, waiting for the other thread to also |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
957 * sync up, whereas another one could be trying to yield, while also |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
958 * waiting for the other threads to sync up too. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
959 * |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
960 * Note, however, that this code is also used during remark and in |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
961 * this case we should not attempt to leave / enter the STS, otherwise |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
962 * we'll either hit an asseert (debug / fastdebug) or deadlock |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
963 * (product). So we should only leave / enter the STS if we are |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
964 * operating concurrently. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
965 * |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
966 * Because the thread that does the sync barrier has left the STS, it |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
967 * is possible to be suspended for a Full GC or an evacuation pause |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
968 * could occur. This is actually safe, since the entering the sync |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
969 * barrier is one of the last things do_marking_step() does, and it |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
970 * doesn't manipulate any data structures afterwards. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
971 */ |
342 | 972 |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
973 void ConcurrentMark::enter_first_sync_barrier(uint worker_id) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
974 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
975 gclog_or_tty->print_cr("[%u] entering first barrier", worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
976 } |
342 | 977 |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
978 if (concurrent()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
979 ConcurrentGCThread::stsLeave(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
980 } |
342 | 981 _first_overflow_barrier_sync.enter(); |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
982 if (concurrent()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
983 ConcurrentGCThread::stsJoin(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
984 } |
342 | 985 // at this point everyone should have synced up and not be doing any |
986 // more work | |
987 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
988 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
989 gclog_or_tty->print_cr("[%u] leaving first barrier", worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
990 } |
342 | 991 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
992 // If we're executing the concurrent phase of marking, reset the marking |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
993 // state; otherwise the marking state is reset after reference processing, |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
994 // during the remark pause. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
995 // If we reset here as a result of an overflow during the remark we will |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
996 // see assertion failures from any subsequent set_concurrency_and_phase() |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
997 // calls. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
998 if (concurrent()) { |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
999 // let the task associated with with worker 0 do this |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1000 if (worker_id == 0) { |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1001 // task 0 is responsible for clearing the global data structures |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1002 // We should be here because of an overflow. During STW we should |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1003 // not clear the overflow flag since we rely on it being true when |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1004 // we exit this method to abort the pause and restart concurent |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1005 // marking. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1006 reset_marking_state(true /* clear_overflow */); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1007 force_overflow()->update(); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1008 |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1009 if (G1Log::fine()) { |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1010 gclog_or_tty->date_stamp(PrintGCDateStamps); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1011 gclog_or_tty->stamp(PrintGCTimeStamps); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1012 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]"); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1013 } |
342 | 1014 } |
1015 } | |
1016 | |
1017 // after this, each task should reset its own data structures then | |
1018 // then go into the second barrier | |
1019 } | |
1020 | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1021 void ConcurrentMark::enter_second_sync_barrier(uint worker_id) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1022 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1023 gclog_or_tty->print_cr("[%u] entering second barrier", worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1024 } |
342 | 1025 |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1026 if (concurrent()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1027 ConcurrentGCThread::stsLeave(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1028 } |
342 | 1029 _second_overflow_barrier_sync.enter(); |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1030 if (concurrent()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1031 ConcurrentGCThread::stsJoin(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1032 } |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1033 // at this point everything should be re-initialized and ready to go |
342 | 1034 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1035 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1036 gclog_or_tty->print_cr("[%u] leaving second barrier", worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1037 } |
342 | 1038 } |
1039 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1040 #ifndef PRODUCT |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1041 void ForceOverflowSettings::init() { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1042 _num_remaining = G1ConcMarkForceOverflow; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1043 _force = false; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1044 update(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1045 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1046 |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1047 void ForceOverflowSettings::update() { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1048 if (_num_remaining > 0) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1049 _num_remaining -= 1; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1050 _force = true; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1051 } else { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1052 _force = false; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1053 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1054 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1055 |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1056 bool ForceOverflowSettings::should_force() { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1057 if (_force) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1058 _force = false; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1059 return true; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1060 } else { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1061 return false; |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1062 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1063 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1064 #endif // !PRODUCT |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1065 |
342 | 1066 class CMConcurrentMarkingTask: public AbstractGangTask { |
1067 private: | |
1068 ConcurrentMark* _cm; | |
1069 ConcurrentMarkThread* _cmt; | |
1070 | |
1071 public: | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1072 void work(uint worker_id) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1073 assert(Thread::current()->is_ConcurrentGC_thread(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1074 "this should only be done by a conc GC thread"); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1972
diff
changeset
|
1075 ResourceMark rm; |
342 | 1076 |
1077 double start_vtime = os::elapsedVTime(); | |
1078 | |
1079 ConcurrentGCThread::stsJoin(); | |
1080 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1081 assert(worker_id < _cm->active_tasks(), "invariant"); |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1082 CMTask* the_task = _cm->task(worker_id); |
342 | 1083 the_task->record_start_time(); |
1084 if (!_cm->has_aborted()) { | |
1085 do { | |
1086 double start_vtime_sec = os::elapsedVTime(); | |
1087 double start_time_sec = os::elapsedTime(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1088 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1089 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1090 the_task->do_marking_step(mark_step_duration_ms, |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
1091 true /* do_termination */, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
1092 false /* is_serial*/); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1093 |
342 | 1094 double end_time_sec = os::elapsedTime(); |
1095 double end_vtime_sec = os::elapsedVTime(); | |
1096 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec; | |
1097 double elapsed_time_sec = end_time_sec - start_time_sec; | |
1098 _cm->clear_has_overflown(); | |
1099 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1100 bool ret = _cm->do_yield_check(worker_id); |
342 | 1101 |
1102 jlong sleep_time_ms; | |
1103 if (!_cm->has_aborted() && the_task->has_aborted()) { | |
1104 sleep_time_ms = | |
1105 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0); | |
1106 ConcurrentGCThread::stsLeave(); | |
1107 os::sleep(Thread::current(), sleep_time_ms, false); | |
1108 ConcurrentGCThread::stsJoin(); | |
1109 } | |
1110 double end_time2_sec = os::elapsedTime(); | |
1111 double elapsed_time2_sec = end_time2_sec - start_time_sec; | |
1112 | |
1113 #if 0 | |
1114 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, " | |
1115 "overhead %1.4lf", | |
1116 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms, | |
1117 the_task->conc_overhead(os::elapsedTime()) * 8.0); | |
1118 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms", | |
1119 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0); | |
1120 #endif | |
1121 } while (!_cm->has_aborted() && the_task->has_aborted()); | |
1122 } | |
1123 the_task->record_end_time(); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1124 guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant"); |
342 | 1125 |
1126 ConcurrentGCThread::stsLeave(); | |
1127 | |
1128 double end_vtime = os::elapsedVTime(); | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1129 _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime); |
342 | 1130 } |
1131 | |
1132 CMConcurrentMarkingTask(ConcurrentMark* cm, | |
1133 ConcurrentMarkThread* cmt) : | |
1134 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { } | |
1135 | |
1136 ~CMConcurrentMarkingTask() { } | |
1137 }; | |
1138 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1139 // Calculates the number of active workers for a concurrent |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1140 // phase. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1141 uint ConcurrentMark::calc_parallel_marking_threads() { |
4711 | 1142 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1143 uint n_conc_workers = 0; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1144 if (!UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1145 (!FLAG_IS_DEFAULT(ConcGCThreads) && |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1146 !ForceDynamicNumberOfGCThreads)) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1147 n_conc_workers = max_parallel_marking_threads(); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1148 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1149 n_conc_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1150 AdaptiveSizePolicy::calc_default_active_workers( |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1151 max_parallel_marking_threads(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1152 1, /* Minimum workers */ |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1153 parallel_marking_threads(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1154 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1155 // Don't scale down "n_conc_workers" by scale_parallel_threads() because |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1156 // that scaling has already gone into "_max_parallel_marking_threads". |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1157 } |
4711 | 1158 assert(n_conc_workers > 0, "Always need at least 1"); |
1159 return n_conc_workers; | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1160 } |
4711 | 1161 // If we are not running with any parallel GC threads we will not |
1162 // have spawned any marking threads either. Hence the number of | |
1163 // concurrent workers should be 0. | |
1164 return 0; | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1165 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1166 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1167 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1168 // Currently, only survivors can be root regions. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1169 assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1170 G1RootRegionScanClosure cl(_g1h, this, worker_id); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1171 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1172 const uintx interval = PrefetchScanIntervalInBytes; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1173 HeapWord* curr = hr->bottom(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1174 const HeapWord* end = hr->top(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1175 while (curr < end) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1176 Prefetch::read(curr, interval); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1177 oop obj = oop(curr); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1178 int size = obj->oop_iterate(&cl); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1179 assert(size == obj->size(), "sanity"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1180 curr += size; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1181 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1182 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1183 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1184 class CMRootRegionScanTask : public AbstractGangTask { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1185 private: |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1186 ConcurrentMark* _cm; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1187 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1188 public: |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1189 CMRootRegionScanTask(ConcurrentMark* cm) : |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1190 AbstractGangTask("Root Region Scan"), _cm(cm) { } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1191 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1192 void work(uint worker_id) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1193 assert(Thread::current()->is_ConcurrentGC_thread(), |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1194 "this should only be done by a conc GC thread"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1195 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1196 CMRootRegions* root_regions = _cm->root_regions(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1197 HeapRegion* hr = root_regions->claim_next(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1198 while (hr != NULL) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1199 _cm->scanRootRegion(hr, worker_id); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1200 hr = root_regions->claim_next(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1201 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1202 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1203 }; |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1204 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1205 void ConcurrentMark::scanRootRegions() { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1206 // scan_in_progress() will have been set to true only if there was |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1207 // at least one root region to scan. So, if it's false, we |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1208 // should not attempt to do any further work. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1209 if (root_regions()->scan_in_progress()) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1210 _parallel_marking_threads = calc_parallel_marking_threads(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1211 assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1212 "Maximum number of marking threads exceeded"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1213 uint active_workers = MAX2(1U, parallel_marking_threads()); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1214 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1215 CMRootRegionScanTask task(this); |
8008
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
8006
diff
changeset
|
1216 if (use_parallel_marking_threads()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1217 _parallel_workers->set_active_workers((int) active_workers); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1218 _parallel_workers->run_task(&task); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1219 } else { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1220 task.work(0); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1221 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1222 |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1223 // It's possible that has_aborted() is true here without actually |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1224 // aborting the survivor scan earlier. This is OK as it's |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1225 // mainly used for sanity checking. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1226 root_regions()->scan_finished(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1227 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1228 } |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1229 |
342 | 1230 void ConcurrentMark::markFromRoots() { |
1231 // we might be tempted to assert that: | |
1232 // assert(asynch == !SafepointSynchronize::is_at_safepoint(), | |
1233 // "inconsistent argument?"); | |
1234 // However that wouldn't be right, because it's possible that | |
1235 // a safepoint is indeed in progress as a younger generation | |
1236 // stop-the-world GC happens even as we mark in this generation. | |
1237 | |
1238 _restart_for_overflow = false; | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1239 force_overflow_conc()->init(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1240 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1241 // _g1h has _n_par_threads |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1242 _parallel_marking_threads = calc_parallel_marking_threads(); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1243 assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1244 "Maximum number of marking threads exceeded"); |
4711 | 1245 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1246 uint active_workers = MAX2(1U, parallel_marking_threads()); |
4711 | 1247 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1248 // Parallel task terminator is set in "set_concurrency_and_phase()" |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
1249 set_concurrency_and_phase(active_workers, true /* concurrent */); |
342 | 1250 |
1251 CMConcurrentMarkingTask markingTask(this, cmThread()); | |
8008
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
8006
diff
changeset
|
1252 if (use_parallel_marking_threads()) { |
4711 | 1253 _parallel_workers->set_active_workers((int)active_workers); |
1254 // Don't set _n_par_threads because it affects MT in proceess_strong_roots() | |
1255 // and the decisions on that MT processing is made elsewhere. | |
1256 assert(_parallel_workers->active_workers() > 0, "Should have been set"); | |
342 | 1257 _parallel_workers->run_task(&markingTask); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1258 } else { |
342 | 1259 markingTask.work(0); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1260 } |
342 | 1261 print_stats(); |
1262 } | |
1263 | |
1264 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) { | |
1265 // world is stopped at this checkpoint | |
1266 assert(SafepointSynchronize::is_at_safepoint(), | |
1267 "world should be stopped"); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1268 |
342 | 1269 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1270 | |
1271 // If a full collection has happened, we shouldn't do this. | |
1272 if (has_aborted()) { | |
1273 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
1274 return; | |
1275 } | |
1276 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1277 SvcGCMarker sgcm(SvcGCMarker::OTHER); |
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1278 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1279 if (VerifyDuringGC) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1280 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1281 Universe::heap()->prepare_for_verify(); |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1282 Universe::verify(VerifyOption_G1UsePrevMarking, |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1283 " VerifyDuringGC:(before)"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1284 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1285 |
342 | 1286 G1CollectorPolicy* g1p = g1h->g1_policy(); |
1287 g1p->record_concurrent_mark_remark_start(); | |
1288 | |
1289 double start = os::elapsedTime(); | |
1290 | |
1291 checkpointRootsFinalWork(); | |
1292 | |
1293 double mark_work_end = os::elapsedTime(); | |
1294 | |
1295 weakRefsWork(clear_all_soft_refs); | |
1296 | |
1297 if (has_overflown()) { | |
1298 // Oops. We overflowed. Restart concurrent marking. | |
1299 _restart_for_overflow = true; | |
8789
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1300 if (G1TraceMarkStackOverflow) { |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1301 gclog_or_tty->print_cr("\nRemark led to restart for overflow."); |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1302 } |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1303 |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1304 // Verify the heap w.r.t. the previous marking bitmap. |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1305 if (VerifyDuringGC) { |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1306 HandleMark hm; // handle scope |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1307 Universe::heap()->prepare_for_verify(); |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1308 Universe::verify(VerifyOption_G1UsePrevMarking, |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1309 " VerifyDuringGC:(overflow)"); |
8789
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1310 } |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
1311 |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
1312 // Clear the marking state because we will be restarting |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
1313 // marking due to overflowing the global mark stack. |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
1314 reset_marking_state(); |
342 | 1315 } else { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1316 // Aggregate the per-task counting data that we have accumulated |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1317 // while marking. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1318 aggregate_count_data(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1319 |
2149 | 1320 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
342 | 1321 // We're done with marking. |
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
1322 // This is the end of the marking cycle, we're expected all |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
1323 // threads to have SATB queues with active set to true. |
2149 | 1324 satb_mq_set.set_active_all_threads(false, /* new active value */ |
1325 true /* expected_active */); | |
811 | 1326 |
1327 if (VerifyDuringGC) { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1328 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1329 Universe::heap()->prepare_for_verify(); |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1330 Universe::verify(VerifyOption_G1UseNextMarking, |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1331 " VerifyDuringGC:(after)"); |
811 | 1332 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1333 assert(!restart_for_overflow(), "sanity"); |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
1334 // Completely reset the marking state since marking completed |
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
1335 set_non_marking_state(); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1336 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1337 |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
1338 // Expand the marking stack, if we have to and if we can. |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
1339 if (_markStack.should_expand()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
1340 _markStack.expand(); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
1341 } |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
1342 |
342 | 1343 // Statistics |
1344 double now = os::elapsedTime(); | |
1345 _remark_mark_times.add((mark_work_end - start) * 1000.0); | |
1346 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0); | |
1347 _remark_times.add((now - start) * 1000.0); | |
1348 | |
1349 g1p->record_concurrent_mark_remark_end(); | |
10405 | 1350 |
1351 G1CMIsAliveClosure is_alive(g1h); | |
1352 g1h->gc_tracer_cm()->report_object_count_after_gc(&is_alive); | |
342 | 1353 } |
1354 | |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1355 // Base class of the closures that finalize and verify the |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1356 // liveness counting data. |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1357 class CMCountDataClosureBase: public HeapRegionClosure { |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1358 protected: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1359 G1CollectedHeap* _g1h; |
342 | 1360 ConcurrentMark* _cm; |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1361 CardTableModRefBS* _ct_bs; |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1362 |
342 | 1363 BitMap* _region_bm; |
1364 BitMap* _card_bm; | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1365 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1366 // Takes a region that's not empty (i.e., it has at least one |
829 | 1367 // live object in it and sets its corresponding bit on the region |
1368 // bitmap to 1. If the region is "starts humongous" it will also set | |
1369 // to 1 the bits on the region bitmap that correspond to its | |
1370 // associated "continues humongous" regions. | |
1371 void set_bit_for_region(HeapRegion* hr) { | |
1372 assert(!hr->continuesHumongous(), "should have filtered those out"); | |
1373 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1374 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
829 | 1375 if (!hr->startsHumongous()) { |
1376 // Normal (non-humongous) case: just set the bit. | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1377 _region_bm->par_at_put(index, true); |
829 | 1378 } else { |
1379 // Starts humongous case: calculate how many regions are part of | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1380 // this humongous region and then set the bit range. |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1381 BitMap::idx_t end_index = (BitMap::idx_t) hr->last_hc_index(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1382 _region_bm->par_at_put_range(index, end_index, true); |
829 | 1383 } |
1384 } | |
1385 | |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1386 public: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1387 CMCountDataClosureBase(G1CollectedHeap* g1h, |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1388 BitMap* region_bm, BitMap* card_bm): |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1389 _g1h(g1h), _cm(g1h->concurrent_mark()), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1390 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1391 _region_bm(region_bm), _card_bm(card_bm) { } |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1392 }; |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1393 |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1394 // Closure that calculates the # live objects per region. Used |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1395 // for verification purposes during the cleanup pause. |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1396 class CalcLiveObjectsClosure: public CMCountDataClosureBase { |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1397 CMBitMapRO* _bm; |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1398 size_t _region_marked_bytes; |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1399 |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1400 public: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1401 CalcLiveObjectsClosure(CMBitMapRO *bm, G1CollectedHeap* g1h, |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1402 BitMap* region_bm, BitMap* card_bm) : |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1403 CMCountDataClosureBase(g1h, region_bm, card_bm), |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1404 _bm(bm), _region_marked_bytes(0) { } |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1405 |
342 | 1406 bool doHeapRegion(HeapRegion* hr) { |
1407 | |
639 | 1408 if (hr->continuesHumongous()) { |
829 | 1409 // We will ignore these here and process them when their |
1410 // associated "starts humongous" region is processed (see | |
1411 // set_bit_for_heap_region()). Note that we cannot rely on their | |
1412 // associated "starts humongous" region to have their bit set to | |
1413 // 1 since, due to the region chunking in the parallel region | |
1414 // iteration, a "continues humongous" region might be visited | |
1415 // before its associated "starts humongous". | |
639 | 1416 return false; |
1417 } | |
342 | 1418 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1419 HeapWord* ntams = hr->next_top_at_mark_start(); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1420 HeapWord* start = hr->bottom(); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1421 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1422 assert(start <= hr->end() && start <= ntams && ntams <= hr->end(), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1423 err_msg("Preconditions not met - " |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1424 "start: "PTR_FORMAT", ntams: "PTR_FORMAT", end: "PTR_FORMAT, |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1425 start, ntams, hr->end())); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1426 |
342 | 1427 // Find the first marked object at or after "start". |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1428 start = _bm->getNextMarkedWordAddress(start, ntams); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1429 |
342 | 1430 size_t marked_bytes = 0; |
1431 | |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1432 while (start < ntams) { |
342 | 1433 oop obj = oop(start); |
1434 int obj_sz = obj->size(); | |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1435 HeapWord* obj_end = start + obj_sz; |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1436 |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1437 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1438 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(obj_end); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1439 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1440 // Note: if we're looking at the last region in heap - obj_end |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1441 // could be actually just beyond the end of the heap; end_idx |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1442 // will then correspond to a (non-existent) card that is also |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1443 // just beyond the heap. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1444 if (_g1h->is_in_g1_reserved(obj_end) && !_ct_bs->is_card_aligned(obj_end)) { |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1445 // end of object is not card aligned - increment to cover |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1446 // all the cards spanned by the object |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1447 end_idx += 1; |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1448 } |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1449 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1450 // Set the bits in the card BM for the cards spanned by this object. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1451 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */); |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1452 |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1453 // Add the size of this object to the number of marked bytes. |
1030
dfdaf65c3423
6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359
apetrusenko
parents:
1023
diff
changeset
|
1454 marked_bytes += (size_t)obj_sz * HeapWordSize; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1455 |
342 | 1456 // Find the next marked object after this one. |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1457 start = _bm->getNextMarkedWordAddress(obj_end, ntams); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1458 } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1459 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1460 // Mark the allocated-since-marking portion... |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1461 HeapWord* top = hr->top(); |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1462 if (ntams < top) { |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1463 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1464 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1465 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1466 // Note: if we're looking at the last region in heap - top |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1467 // could be actually just beyond the end of the heap; end_idx |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1468 // will then correspond to a (non-existent) card that is also |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1469 // just beyond the heap. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1470 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) { |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1471 // end of object is not card aligned - increment to cover |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1472 // all the cards spanned by the object |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1473 end_idx += 1; |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1474 } |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1475 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1476 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1477 // This definitely means the region has live objects. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1478 set_bit_for_region(hr); |
342 | 1479 } |
1480 | |
1481 // Update the live region bitmap. | |
1482 if (marked_bytes > 0) { | |
829 | 1483 set_bit_for_region(hr); |
342 | 1484 } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1485 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1486 // Set the marked bytes for the current region so that |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1487 // it can be queried by a calling verificiation routine |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1488 _region_marked_bytes = marked_bytes; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1489 |
342 | 1490 return false; |
1491 } | |
1492 | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1493 size_t region_marked_bytes() const { return _region_marked_bytes; } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1494 }; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1495 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1496 // Heap region closure used for verifying the counting data |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1497 // that was accumulated concurrently and aggregated during |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1498 // the remark pause. This closure is applied to the heap |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1499 // regions during the STW cleanup pause. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1500 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1501 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure { |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1502 G1CollectedHeap* _g1h; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1503 ConcurrentMark* _cm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1504 CalcLiveObjectsClosure _calc_cl; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1505 BitMap* _region_bm; // Region BM to be verified |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1506 BitMap* _card_bm; // Card BM to be verified |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1507 bool _verbose; // verbose output? |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1508 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1509 BitMap* _exp_region_bm; // Expected Region BM values |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1510 BitMap* _exp_card_bm; // Expected card BM values |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1511 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1512 int _failures; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1513 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1514 public: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1515 VerifyLiveObjectDataHRClosure(G1CollectedHeap* g1h, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1516 BitMap* region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1517 BitMap* card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1518 BitMap* exp_region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1519 BitMap* exp_card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1520 bool verbose) : |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1521 _g1h(g1h), _cm(g1h->concurrent_mark()), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1522 _calc_cl(_cm->nextMarkBitMap(), g1h, exp_region_bm, exp_card_bm), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1523 _region_bm(region_bm), _card_bm(card_bm), _verbose(verbose), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1524 _exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1525 _failures(0) { } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1526 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1527 int failures() const { return _failures; } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1528 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1529 bool doHeapRegion(HeapRegion* hr) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1530 if (hr->continuesHumongous()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1531 // We will ignore these here and process them when their |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1532 // associated "starts humongous" region is processed (see |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1533 // set_bit_for_heap_region()). Note that we cannot rely on their |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1534 // associated "starts humongous" region to have their bit set to |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1535 // 1 since, due to the region chunking in the parallel region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1536 // iteration, a "continues humongous" region might be visited |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1537 // before its associated "starts humongous". |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1538 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1539 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1540 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1541 int failures = 0; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1542 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1543 // Call the CalcLiveObjectsClosure to walk the marking bitmap for |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1544 // this region and set the corresponding bits in the expected region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1545 // and card bitmaps. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1546 bool res = _calc_cl.doHeapRegion(hr); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1547 assert(res == false, "should be continuing"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1548 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1549 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1550 Mutex::_no_safepoint_check_flag); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1551 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1552 // Verify the marked bytes for this region. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1553 size_t exp_marked_bytes = _calc_cl.region_marked_bytes(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1554 size_t act_marked_bytes = hr->next_marked_bytes(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1555 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1556 // We're not OK if expected marked bytes > actual marked bytes. It means |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1557 // we have missed accounting some objects during the actual marking. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1558 if (exp_marked_bytes > act_marked_bytes) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1559 if (_verbose) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1560 gclog_or_tty->print_cr("Region %u: marked bytes mismatch: " |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1561 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1562 hr->hrs_index(), exp_marked_bytes, act_marked_bytes); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1563 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1564 failures += 1; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1565 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1566 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1567 // Verify the bit, for this region, in the actual and expected |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1568 // (which was just calculated) region bit maps. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1569 // We're not OK if the bit in the calculated expected region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1570 // bitmap is set and the bit in the actual region bitmap is not. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1571 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1572 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1573 bool expected = _exp_region_bm->at(index); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1574 bool actual = _region_bm->at(index); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1575 if (expected && !actual) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1576 if (_verbose) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1577 gclog_or_tty->print_cr("Region %u: region bitmap mismatch: " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1578 "expected: %s, actual: %s", |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1579 hr->hrs_index(), |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1580 BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1581 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1582 failures += 1; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1583 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1584 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1585 // Verify that the card bit maps for the cards spanned by the current |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1586 // region match. We have an error if we have a set bit in the expected |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1587 // bit map and the corresponding bit in the actual bitmap is not set. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1588 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1589 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom()); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1590 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top()); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1591 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1592 for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1593 expected = _exp_card_bm->at(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1594 actual = _card_bm->at(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1595 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1596 if (expected && !actual) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1597 if (_verbose) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1598 gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1599 "expected: %s, actual: %s", |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1600 hr->hrs_index(), i, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1601 BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1602 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1603 failures += 1; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1604 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1605 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1606 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1607 if (failures > 0 && _verbose) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1608 gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", " |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1609 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1610 HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1611 _calc_cl.region_marked_bytes(), hr->next_marked_bytes()); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1612 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1613 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1614 _failures += failures; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1615 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1616 // We could stop iteration over the heap when we |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1617 // find the first violating region by returning true. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1618 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1619 } |
342 | 1620 }; |
1621 | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1622 class G1ParVerifyFinalCountTask: public AbstractGangTask { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1623 protected: |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1624 G1CollectedHeap* _g1h; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1625 ConcurrentMark* _cm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1626 BitMap* _actual_region_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1627 BitMap* _actual_card_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1628 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1629 uint _n_workers; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1630 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1631 BitMap* _expected_region_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1632 BitMap* _expected_card_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1633 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1634 int _failures; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1635 bool _verbose; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1636 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1637 public: |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1638 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1639 BitMap* region_bm, BitMap* card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1640 BitMap* expected_region_bm, BitMap* expected_card_bm) |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1641 : AbstractGangTask("G1 verify final counting"), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1642 _g1h(g1h), _cm(_g1h->concurrent_mark()), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1643 _actual_region_bm(region_bm), _actual_card_bm(card_bm), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1644 _expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1645 _failures(0), _verbose(false), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1646 _n_workers(0) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1647 assert(VerifyDuringGC, "don't call this otherwise"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1648 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1649 // Use the value already set as the number of active threads |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1650 // in the call to run_task(). |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1651 if (G1CollectedHeap::use_parallel_gc_threads()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1652 assert( _g1h->workers()->active_workers() > 0, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1653 "Should have been previously set"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1654 _n_workers = _g1h->workers()->active_workers(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1655 } else { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1656 _n_workers = 1; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1657 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1658 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1659 assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1660 assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1661 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1662 _verbose = _cm->verbose_medium(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1663 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1664 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1665 void work(uint worker_id) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1666 assert(worker_id < _n_workers, "invariant"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1667 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1668 VerifyLiveObjectDataHRClosure verify_cl(_g1h, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1669 _actual_region_bm, _actual_card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1670 _expected_region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1671 _expected_card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1672 _verbose); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1673 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1674 if (G1CollectedHeap::use_parallel_gc_threads()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1675 _g1h->heap_region_par_iterate_chunked(&verify_cl, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1676 worker_id, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1677 _n_workers, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1678 HeapRegion::VerifyCountClaimValue); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1679 } else { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1680 _g1h->heap_region_iterate(&verify_cl); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1681 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1682 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1683 Atomic::add(verify_cl.failures(), &_failures); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1684 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1685 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1686 int failures() const { return _failures; } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1687 }; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1688 |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1689 // Closure that finalizes the liveness counting data. |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1690 // Used during the cleanup pause. |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1691 // Sets the bits corresponding to the interval [NTAMS, top] |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1692 // (which contains the implicitly live objects) in the |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1693 // card liveness bitmap. Also sets the bit for each region, |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1694 // containing live data, in the region liveness bitmap. |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1695 |
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1696 class FinalCountDataUpdateClosure: public CMCountDataClosureBase { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1697 public: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1698 FinalCountDataUpdateClosure(G1CollectedHeap* g1h, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1699 BitMap* region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1700 BitMap* card_bm) : |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1701 CMCountDataClosureBase(g1h, region_bm, card_bm) { } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1702 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1703 bool doHeapRegion(HeapRegion* hr) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1704 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1705 if (hr->continuesHumongous()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1706 // We will ignore these here and process them when their |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1707 // associated "starts humongous" region is processed (see |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1708 // set_bit_for_heap_region()). Note that we cannot rely on their |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1709 // associated "starts humongous" region to have their bit set to |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1710 // 1 since, due to the region chunking in the parallel region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1711 // iteration, a "continues humongous" region might be visited |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1712 // before its associated "starts humongous". |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1713 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1714 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1715 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1716 HeapWord* ntams = hr->next_top_at_mark_start(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1717 HeapWord* top = hr->top(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1718 |
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1719 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions."); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1720 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1721 // Mark the allocated-since-marking portion... |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1722 if (ntams < top) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1723 // This definitely means the region has live objects. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1724 set_bit_for_region(hr); |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1725 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1726 // Now set the bits in the card bitmap for [ntams, top) |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1727 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1728 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(top); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1729 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1730 // Note: if we're looking at the last region in heap - top |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1731 // could be actually just beyond the end of the heap; end_idx |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1732 // will then correspond to a (non-existent) card that is also |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1733 // just beyond the heap. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1734 if (_g1h->is_in_g1_reserved(top) && !_ct_bs->is_card_aligned(top)) { |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1735 // end of object is not card aligned - increment to cover |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1736 // all the cards spanned by the object |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1737 end_idx += 1; |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1738 } |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1739 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1740 assert(end_idx <= _card_bm->size(), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1741 err_msg("oob: end_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT, |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1742 end_idx, _card_bm->size())); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1743 assert(start_idx < _card_bm->size(), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1744 err_msg("oob: start_idx= "SIZE_FORMAT", bitmap size= "SIZE_FORMAT, |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1745 start_idx, _card_bm->size())); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1746 |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1747 _cm->set_card_bitmap_range(_card_bm, start_idx, end_idx, true /* is_par */); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
1748 } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1749 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1750 // Set the bit for the region if it contains live data |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1751 if (hr->next_marked_bytes() > 0) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1752 set_bit_for_region(hr); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1753 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1754 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1755 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1756 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1757 }; |
342 | 1758 |
1759 class G1ParFinalCountTask: public AbstractGangTask { | |
1760 protected: | |
1761 G1CollectedHeap* _g1h; | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1762 ConcurrentMark* _cm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1763 BitMap* _actual_region_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1764 BitMap* _actual_card_bm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1765 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1766 uint _n_workers; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1767 |
342 | 1768 public: |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1769 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm) |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1770 : AbstractGangTask("G1 final counting"), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1771 _g1h(g1h), _cm(_g1h->concurrent_mark()), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1772 _actual_region_bm(region_bm), _actual_card_bm(card_bm), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1773 _n_workers(0) { |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1774 // Use the value already set as the number of active threads |
6011 | 1775 // in the call to run_task(). |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1776 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1777 assert( _g1h->workers()->active_workers() > 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1778 "Should have been previously set"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1779 _n_workers = _g1h->workers()->active_workers(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1780 } else { |
342 | 1781 _n_workers = 1; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1782 } |
342 | 1783 } |
1784 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1785 void work(uint worker_id) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1786 assert(worker_id < _n_workers, "invariant"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1787 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
1788 FinalCountDataUpdateClosure final_update_cl(_g1h, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1789 _actual_region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1790 _actual_card_bm); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1791 |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1792 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1793 _g1h->heap_region_par_iterate_chunked(&final_update_cl, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1794 worker_id, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1795 _n_workers, |
355 | 1796 HeapRegion::FinalCountClaimValue); |
342 | 1797 } else { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1798 _g1h->heap_region_iterate(&final_update_cl); |
342 | 1799 } |
1800 } | |
1801 }; | |
1802 | |
1803 class G1ParNoteEndTask; | |
1804 | |
1805 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure { | |
1806 G1CollectedHeap* _g1; | |
1807 int _worker_num; | |
1808 size_t _max_live_bytes; | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1809 uint _regions_claimed; |
342 | 1810 size_t _freed_bytes; |
2173 | 1811 FreeRegionList* _local_cleanup_list; |
4072 | 1812 OldRegionSet* _old_proxy_set; |
2173 | 1813 HumongousRegionSet* _humongous_proxy_set; |
1814 HRRSCleanupTask* _hrrs_cleanup_task; | |
342 | 1815 double _claimed_region_time; |
1816 double _max_region_time; | |
1817 | |
1818 public: | |
1819 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1, | |
2173 | 1820 int worker_num, |
1821 FreeRegionList* local_cleanup_list, | |
4072 | 1822 OldRegionSet* old_proxy_set, |
2173 | 1823 HumongousRegionSet* humongous_proxy_set, |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1824 HRRSCleanupTask* hrrs_cleanup_task) : |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1825 _g1(g1), _worker_num(worker_num), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1826 _max_live_bytes(0), _regions_claimed(0), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1827 _freed_bytes(0), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1828 _claimed_region_time(0.0), _max_region_time(0.0), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1829 _local_cleanup_list(local_cleanup_list), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1830 _old_proxy_set(old_proxy_set), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1831 _humongous_proxy_set(humongous_proxy_set), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1832 _hrrs_cleanup_task(hrrs_cleanup_task) { } |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1833 |
342 | 1834 size_t freed_bytes() { return _freed_bytes; } |
1835 | |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1836 bool doHeapRegion(HeapRegion *hr) { |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1837 if (hr->continuesHumongous()) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1838 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1839 } |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1840 // We use a claim value of zero here because all regions |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1841 // were claimed with value 1 in the FinalCount task. |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1842 _g1->reset_gc_time_stamps(hr); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1843 double start = os::elapsedTime(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1844 _regions_claimed++; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1845 hr->note_end_of_marking(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1846 _max_live_bytes += hr->max_live_bytes(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1847 _g1->free_region_if_empty(hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1848 &_freed_bytes, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1849 _local_cleanup_list, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1850 _old_proxy_set, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1851 _humongous_proxy_set, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1852 _hrrs_cleanup_task, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1853 true /* par */); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1854 double region_time = (os::elapsedTime() - start); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1855 _claimed_region_time += region_time; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1856 if (region_time > _max_region_time) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1857 _max_region_time = region_time; |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1858 } |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1859 return false; |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1860 } |
342 | 1861 |
1862 size_t max_live_bytes() { return _max_live_bytes; } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1863 uint regions_claimed() { return _regions_claimed; } |
342 | 1864 double claimed_region_time_sec() { return _claimed_region_time; } |
1865 double max_region_time_sec() { return _max_region_time; } | |
1866 }; | |
1867 | |
1868 class G1ParNoteEndTask: public AbstractGangTask { | |
1869 friend class G1NoteEndOfConcMarkClosure; | |
2152 | 1870 |
342 | 1871 protected: |
1872 G1CollectedHeap* _g1h; | |
1873 size_t _max_live_bytes; | |
1874 size_t _freed_bytes; | |
2152 | 1875 FreeRegionList* _cleanup_list; |
1876 | |
342 | 1877 public: |
1878 G1ParNoteEndTask(G1CollectedHeap* g1h, | |
2152 | 1879 FreeRegionList* cleanup_list) : |
342 | 1880 AbstractGangTask("G1 note end"), _g1h(g1h), |
2152 | 1881 _max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { } |
342 | 1882 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1883 void work(uint worker_id) { |
342 | 1884 double start = os::elapsedTime(); |
2173 | 1885 FreeRegionList local_cleanup_list("Local Cleanup List"); |
4072 | 1886 OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set"); |
2173 | 1887 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set"); |
1888 HRRSCleanupTask hrrs_cleanup_task; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1889 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list, |
4072 | 1890 &old_proxy_set, |
2173 | 1891 &humongous_proxy_set, |
1892 &hrrs_cleanup_task); | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1893 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1894 _g1h->heap_region_par_iterate_chunked(&g1_note_end, worker_id, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1895 _g1h->workers()->active_workers(), |
355 | 1896 HeapRegion::NoteEndClaimValue); |
342 | 1897 } else { |
1898 _g1h->heap_region_iterate(&g1_note_end); | |
1899 } | |
1900 assert(g1_note_end.complete(), "Shouldn't have yielded!"); | |
1901 | |
2152 | 1902 // Now update the lists |
1903 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(), | |
1904 NULL /* free_list */, | |
4072 | 1905 &old_proxy_set, |
2173 | 1906 &humongous_proxy_set, |
2152 | 1907 true /* par */); |
342 | 1908 { |
1909 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
1910 _max_live_bytes += g1_note_end.max_live_bytes(); | |
1911 _freed_bytes += g1_note_end.freed_bytes(); | |
2152 | 1912 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1913 // If we iterate over the global cleanup list at the end of |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1914 // cleanup to do this printing we will not guarantee to only |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1915 // generate output for the newly-reclaimed regions (the list |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1916 // might not be empty at the beginning of cleanup; we might |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1917 // still be working on its previous contents). So we do the |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1918 // printing here, before we append the new regions to the global |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1919 // cleanup list. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1920 |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1921 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1922 if (hr_printer->is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1923 HeapRegionLinkedListIterator iter(&local_cleanup_list); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1924 while (iter.more_available()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1925 HeapRegion* hr = iter.get_next(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1926 hr_printer->cleanup(hr); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1927 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1928 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1929 |
2173 | 1930 _cleanup_list->add_as_tail(&local_cleanup_list); |
1931 assert(local_cleanup_list.is_empty(), "post-condition"); | |
1932 | |
1933 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task); | |
342 | 1934 } |
1935 } | |
1936 size_t max_live_bytes() { return _max_live_bytes; } | |
1937 size_t freed_bytes() { return _freed_bytes; } | |
1938 }; | |
1939 | |
1940 class G1ParScrubRemSetTask: public AbstractGangTask { | |
1941 protected: | |
1942 G1RemSet* _g1rs; | |
1943 BitMap* _region_bm; | |
1944 BitMap* _card_bm; | |
1945 public: | |
1946 G1ParScrubRemSetTask(G1CollectedHeap* g1h, | |
1947 BitMap* region_bm, BitMap* card_bm) : | |
1948 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()), | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1949 _region_bm(region_bm), _card_bm(card_bm) { } |
342 | 1950 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1951 void work(uint worker_id) { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1952 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1953 _g1rs->scrub_par(_region_bm, _card_bm, worker_id, |
355 | 1954 HeapRegion::ScrubRemSetClaimValue); |
342 | 1955 } else { |
1956 _g1rs->scrub(_region_bm, _card_bm); | |
1957 } | |
1958 } | |
1959 | |
1960 }; | |
1961 | |
1962 void ConcurrentMark::cleanup() { | |
1963 // world is stopped at this checkpoint | |
1964 assert(SafepointSynchronize::is_at_safepoint(), | |
1965 "world should be stopped"); | |
1966 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
1967 | |
1968 // If a full collection has happened, we shouldn't do this. | |
1969 if (has_aborted()) { | |
1970 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
1971 return; | |
1972 } | |
1973 | |
4072 | 1974 HRSPhaseSetter x(HRSPhaseCleanup); |
2152 | 1975 g1h->verify_region_sets_optional(); |
1976 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1977 if (VerifyDuringGC) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1978 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1979 Universe::heap()->prepare_for_verify(); |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1980 Universe::verify(VerifyOption_G1UsePrevMarking, |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
1981 " VerifyDuringGC:(before)"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1982 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1983 |
342 | 1984 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy(); |
1985 g1p->record_concurrent_mark_cleanup_start(); | |
1986 | |
1987 double start = os::elapsedTime(); | |
1988 | |
2173 | 1989 HeapRegionRemSet::reset_for_cleanup_tasks(); |
1990 | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1991 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1992 |
342 | 1993 // Do counting once more with the world stopped for good measure. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1994 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1995 |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1996 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1997 assert(g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
355 | 1998 "sanity check"); |
1999 | |
4711 | 2000 g1h->set_par_threads(); |
2001 n_workers = g1h->n_par_threads(); | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2002 assert(g1h->n_par_threads() == n_workers, |
4711 | 2003 "Should not have been reset"); |
342 | 2004 g1h->workers()->run_task(&g1_par_count_task); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2005 // Done with the parallel phase so reset to 0. |
342 | 2006 g1h->set_par_threads(0); |
355 | 2007 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2008 assert(g1h->check_heap_region_claim_values(HeapRegion::FinalCountClaimValue), |
355 | 2009 "sanity check"); |
342 | 2010 } else { |
4711 | 2011 n_workers = 1; |
342 | 2012 g1_par_count_task.work(0); |
2013 } | |
2014 | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2015 if (VerifyDuringGC) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2016 // Verify that the counting data accumulated during marking matches |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2017 // that calculated by walking the marking bitmap. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2018 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2019 // Bitmaps to hold expected values |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2020 BitMap expected_region_bm(_region_bm.size(), false); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2021 BitMap expected_card_bm(_card_bm.size(), false); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2022 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2023 G1ParVerifyFinalCountTask g1_par_verify_task(g1h, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2024 &_region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2025 &_card_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2026 &expected_region_bm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2027 &expected_card_bm); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2028 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2029 if (G1CollectedHeap::use_parallel_gc_threads()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2030 g1h->set_par_threads((int)n_workers); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2031 g1h->workers()->run_task(&g1_par_verify_task); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2032 // Done with the parallel phase so reset to 0. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2033 g1h->set_par_threads(0); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2034 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2035 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2036 "sanity check"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2037 } else { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2038 g1_par_verify_task.work(0); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2039 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2040 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2041 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2042 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2043 |
342 | 2044 size_t start_used_bytes = g1h->used(); |
2045 g1h->set_marking_complete(); | |
2046 | |
2047 double count_end = os::elapsedTime(); | |
2048 double this_final_counting_time = (count_end - start); | |
2049 _total_counting_time += this_final_counting_time; | |
2050 | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
2051 if (G1PrintRegionLivenessInfo) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
2052 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking"); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
2053 _g1h->heap_region_iterate(&cl); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
2054 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
2055 |
342 | 2056 // Install newly created mark bitMap as "prev". |
2057 swapMarkBitMaps(); | |
2058 | |
2059 g1h->reset_gc_time_stamp(); | |
2060 | |
2061 // Note end of marking in all heap regions. | |
2152 | 2062 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
2063 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2064 g1h->set_par_threads((int)n_workers); |
342 | 2065 g1h->workers()->run_task(&g1_par_note_end_task); |
2066 g1h->set_par_threads(0); | |
355 | 2067 |
2068 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue), | |
2069 "sanity check"); | |
342 | 2070 } else { |
2071 g1_par_note_end_task.work(0); | |
2072 } | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2073 g1h->check_gc_time_stamps(); |
2152 | 2074 |
2075 if (!cleanup_list_is_empty()) { | |
2076 // The cleanup list is not empty, so we'll have to process it | |
2077 // concurrently. Notify anyone else that might be wanting free | |
2078 // regions that there will be more free regions coming soon. | |
2079 g1h->set_free_regions_coming(); | |
2080 } | |
342 | 2081 |
2082 // call below, since it affects the metric by which we sort the heap | |
2083 // regions. | |
2084 if (G1ScrubRemSets) { | |
2085 double rs_scrub_start = os::elapsedTime(); | |
2086 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm); | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
2087 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2088 g1h->set_par_threads((int)n_workers); |
342 | 2089 g1h->workers()->run_task(&g1_par_scrub_rs_task); |
2090 g1h->set_par_threads(0); | |
355 | 2091 |
2092 assert(g1h->check_heap_region_claim_values( | |
2093 HeapRegion::ScrubRemSetClaimValue), | |
2094 "sanity check"); | |
342 | 2095 } else { |
2096 g1_par_scrub_rs_task.work(0); | |
2097 } | |
2098 | |
2099 double rs_scrub_end = os::elapsedTime(); | |
2100 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start); | |
2101 _total_rs_scrub_time += this_rs_scrub_time; | |
2102 } | |
2103 | |
2104 // this will also free any regions totally full of garbage objects, | |
2105 // and sort the regions. | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2106 g1h->g1_policy()->record_concurrent_mark_cleanup_end((int)n_workers); |
342 | 2107 |
2108 // Statistics. | |
2109 double end = os::elapsedTime(); | |
2110 _cleanup_times.add((end - start) * 1000.0); | |
2111 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
2112 if (G1Log::fine()) { |
342 | 2113 g1h->print_size_transition(gclog_or_tty, |
2114 start_used_bytes, | |
2115 g1h->used(), | |
2116 g1h->capacity()); | |
2117 } | |
2118 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2119 // Clean up will have freed any regions completely full of garbage. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2120 // Update the soft reference policy with the new heap occupancy. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2121 Universe::update_heap_info_at_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2122 |
342 | 2123 // We need to make this be a "collection" so any collection pause that |
2124 // races with it goes around and waits for completeCleanup to finish. | |
2125 g1h->increment_total_collections(); | |
2126 | |
4830
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
2127 // We reclaimed old regions so we should calculate the sizes to make |
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
2128 // sure we update the old gen/space data. |
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
2129 g1h->g1mm()->update_sizes(); |
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
2130 |
751 | 2131 if (VerifyDuringGC) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2132 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2133 Universe::heap()->prepare_for_verify(); |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
2134 Universe::verify(VerifyOption_G1UsePrevMarking, |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9076
diff
changeset
|
2135 " VerifyDuringGC:(after)"); |
342 | 2136 } |
2152 | 2137 |
2138 g1h->verify_region_sets_optional(); | |
10405 | 2139 g1h->trace_heap_after_concurrent_cycle(); |
342 | 2140 } |
2141 | |
2142 void ConcurrentMark::completeCleanup() { | |
2143 if (has_aborted()) return; | |
2144 | |
2152 | 2145 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
2146 | |
2147 _cleanup_list.verify_optional(); | |
2361 | 2148 FreeRegionList tmp_free_list("Tmp Free List"); |
2152 | 2149 |
2150 if (G1ConcRegionFreeingVerbose) { | |
2151 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2152 "cleanup list has %u entries", |
2152 | 2153 _cleanup_list.length()); |
2154 } | |
2155 | |
2156 // Noone else should be accessing the _cleanup_list at this point, | |
2157 // so it's not necessary to take any locks | |
2158 while (!_cleanup_list.is_empty()) { | |
2159 HeapRegion* hr = _cleanup_list.remove_head(); | |
2160 assert(hr != NULL, "the list was not empty"); | |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3316
diff
changeset
|
2161 hr->par_clear(); |
2361 | 2162 tmp_free_list.add_as_tail(hr); |
2152 | 2163 |
2164 // Instead of adding one region at a time to the secondary_free_list, | |
2165 // we accumulate them in the local list and move them a few at a | |
2166 // time. This also cuts down on the number of notify_all() calls | |
2167 // we do during this process. We'll also append the local list when | |
2168 // _cleanup_list is empty (which means we just removed the last | |
2169 // region from the _cleanup_list). | |
2361 | 2170 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) || |
2152 | 2171 _cleanup_list.is_empty()) { |
2172 if (G1ConcRegionFreeingVerbose) { | |
2173 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2174 "appending %u entries to the secondary_free_list, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2175 "cleanup list still has %u entries", |
2361 | 2176 tmp_free_list.length(), |
2152 | 2177 _cleanup_list.length()); |
342 | 2178 } |
2152 | 2179 |
2180 { | |
2181 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
2361 | 2182 g1h->secondary_free_list_add_as_tail(&tmp_free_list); |
2152 | 2183 SecondaryFreeList_lock->notify_all(); |
2184 } | |
2185 | |
2186 if (G1StressConcRegionFreeing) { | |
2187 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) { | |
2188 os::sleep(Thread::current(), (jlong) 1, false); | |
2189 } | |
2190 } | |
342 | 2191 } |
2192 } | |
2361 | 2193 assert(tmp_free_list.is_empty(), "post-condition"); |
342 | 2194 } |
2195 | |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2196 // Supporting Object and Oop closures for reference discovery |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2197 // and processing in during marking |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2198 |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2199 bool G1CMIsAliveClosure::do_object_b(oop obj) { |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2200 HeapWord* addr = (HeapWord*)obj; |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2201 return addr != NULL && |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2202 (!_g1->is_in_g1_reserved(addr) || !_g1->is_obj_ill(obj)); |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2203 } |
342 | 2204 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2205 // 'Keep Alive' oop closure used by both serial parallel reference processing. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2206 // Uses the CMTask associated with a worker thread (for serial reference |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2207 // processing the CMTask for worker 0 is used) to preserve (mark) and |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2208 // trace referent objects. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2209 // |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2210 // Using the CMTask and embedded local queues avoids having the worker |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2211 // threads operating on the global mark stack. This reduces the risk |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2212 // of overflowing the stack - which we would rather avoid at this late |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2213 // state. Also using the tasks' local queues removes the potential |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2214 // of the workers interfering with each other that could occur if |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2215 // operating on the global stack. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2216 |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2217 class G1CMKeepAliveAndDrainClosure: public OopClosure { |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2218 ConcurrentMark* _cm; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2219 CMTask* _task; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2220 int _ref_counter_limit; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2221 int _ref_counter; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2222 bool _is_serial; |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2223 public: |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2224 G1CMKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) : |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2225 _cm(cm), _task(task), _is_serial(is_serial), |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2226 _ref_counter_limit(G1RefProcDrainInterval) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2227 assert(_ref_counter_limit > 0, "sanity"); |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2228 assert(!_is_serial || _task->worker_id() == 0, "only task 0 for serial code"); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2229 _ref_counter = _ref_counter_limit; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2230 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2231 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2232 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2233 virtual void do_oop( oop* p) { do_oop_work(p); } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2234 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2235 template <class T> void do_oop_work(T* p) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2236 if (!_cm->has_overflown()) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2237 oop obj = oopDesc::load_decode_heap_oop(p); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2238 if (_cm->verbose_high()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2239 gclog_or_tty->print_cr("\t[%u] we're looking at location " |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2240 "*"PTR_FORMAT" = "PTR_FORMAT, |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2241 _task->worker_id(), p, (void*) obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2242 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2243 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2244 _task->deal_with_reference(obj); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2245 _ref_counter--; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2246 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2247 if (_ref_counter == 0) { |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2248 // We have dealt with _ref_counter_limit references, pushing them |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2249 // and objects reachable from them on to the local stack (and |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2250 // possibly the global stack). Call CMTask::do_marking_step() to |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2251 // process these entries. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2252 // |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2253 // We call CMTask::do_marking_step() in a loop, which we'll exit if |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2254 // there's nothing more to do (i.e. we're done with the entries that |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2255 // were pushed as a result of the CMTask::deal_with_reference() calls |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2256 // above) or we overflow. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2257 // |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2258 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2259 // flag while there may still be some work to do. (See the comment at |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2260 // the beginning of CMTask::do_marking_step() for those conditions - |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2261 // one of which is reaching the specified time target.) It is only |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2262 // when CMTask::do_marking_step() returns without setting the |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2263 // has_aborted() flag that the marking step has completed. |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2264 do { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2265 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2266 _task->do_marking_step(mark_step_duration_ms, |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2267 false /* do_termination */, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2268 _is_serial); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2269 } while (_task->has_aborted() && !_cm->has_overflown()); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2270 _ref_counter = _ref_counter_limit; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2271 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2272 } else { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2273 if (_cm->verbose_high()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2274 gclog_or_tty->print_cr("\t[%u] CM Overflow", _task->worker_id()); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2275 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2276 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2277 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2278 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2279 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2280 // 'Drain' oop closure used by both serial and parallel reference processing. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2281 // Uses the CMTask associated with a given worker thread (for serial |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2282 // reference processing the CMtask for worker 0 is used). Calls the |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2283 // do_marking_step routine, with an unbelievably large timeout value, |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2284 // to drain the marking data structures of the remaining entries |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2285 // added by the 'keep alive' oop closure above. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2286 |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2287 class G1CMDrainMarkingStackClosure: public VoidClosure { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2288 ConcurrentMark* _cm; |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2289 CMTask* _task; |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2290 bool _is_serial; |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2291 public: |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2292 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task, bool is_serial) : |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2293 _cm(cm), _task(task), _is_serial(is_serial) { |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2294 assert(!_is_serial || _task->worker_id() == 0, "only task 0 for serial code"); |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2295 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2296 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2297 void do_void() { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2298 do { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2299 if (_cm->verbose_high()) { |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2300 gclog_or_tty->print_cr("\t[%u] Drain: Calling do_marking_step - serial: %s", |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2301 _task->worker_id(), BOOL_TO_STR(_is_serial)); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2302 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2303 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2304 // We call CMTask::do_marking_step() to completely drain the local |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2305 // and global marking stacks of entries pushed by the 'keep alive' |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2306 // oop closure (an instance of G1CMKeepAliveAndDrainClosure above). |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2307 // |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2308 // CMTask::do_marking_step() is called in a loop, which we'll exit |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2309 // if there's nothing more to do (i.e. we'completely drained the |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2310 // entries that were pushed as a a result of applying the 'keep alive' |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2311 // closure to the entries on the discovered ref lists) or we overflow |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2312 // the global marking stack. |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2313 // |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2314 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2315 // flag while there may still be some work to do. (See the comment at |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2316 // the beginning of CMTask::do_marking_step() for those conditions - |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2317 // one of which is reaching the specified time target.) It is only |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2318 // when CMTask::do_marking_step() returns without setting the |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2319 // has_aborted() flag that the marking step has completed. |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2320 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2321 _task->do_marking_step(1000000000.0 /* something very large */, |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2322 true /* do_termination */, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2323 _is_serial); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2324 } while (_task->has_aborted() && !_cm->has_overflown()); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2325 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2326 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2327 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2328 // Implementation of AbstractRefProcTaskExecutor for parallel |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2329 // reference processing at the end of G1 concurrent marking |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2330 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2331 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2332 private: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2333 G1CollectedHeap* _g1h; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2334 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2335 WorkGang* _workers; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2336 int _active_workers; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2337 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2338 public: |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2339 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h, |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2340 ConcurrentMark* cm, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2341 WorkGang* workers, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2342 int n_workers) : |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2343 _g1h(g1h), _cm(cm), |
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2344 _workers(workers), _active_workers(n_workers) { } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2345 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2346 // Executes the given task using concurrent marking worker threads. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2347 virtual void execute(ProcessTask& task); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2348 virtual void execute(EnqueueTask& task); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2349 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2350 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2351 class G1CMRefProcTaskProxy: public AbstractGangTask { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2352 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2353 ProcessTask& _proc_task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2354 G1CollectedHeap* _g1h; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2355 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2356 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2357 public: |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2358 G1CMRefProcTaskProxy(ProcessTask& proc_task, |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2359 G1CollectedHeap* g1h, |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2360 ConcurrentMark* cm) : |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2361 AbstractGangTask("Process reference objects in parallel"), |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2362 _proc_task(proc_task), _g1h(g1h), _cm(cm) { |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2363 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2364 assert(rp->processing_is_mt(), "shouldn't be here otherwise"); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2365 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2366 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2367 virtual void work(uint worker_id) { |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2368 CMTask* task = _cm->task(worker_id); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2369 G1CMIsAliveClosure g1_is_alive(_g1h); |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2370 G1CMKeepAliveAndDrainClosure g1_par_keep_alive(_cm, task, false /* is_serial */); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2371 G1CMDrainMarkingStackClosure g1_par_drain(_cm, task, false /* is_serial */); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2372 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2373 _proc_task.work(worker_id, g1_is_alive, g1_par_keep_alive, g1_par_drain); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2374 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2375 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2376 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2377 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2378 assert(_workers != NULL, "Need parallel worker threads."); |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2379 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT"); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2380 |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2381 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2382 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2383 // We need to reset the concurrency level before each |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2384 // proxy task execution, so that the termination protocol |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2385 // and overflow handling in CMTask::do_marking_step() knows |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2386 // how many workers to wait for. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2387 _cm->set_concurrency(_active_workers); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2388 _g1h->set_par_threads(_active_workers); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2389 _workers->run_task(&proc_task_proxy); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2390 _g1h->set_par_threads(0); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2391 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2392 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2393 class G1CMRefEnqueueTaskProxy: public AbstractGangTask { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2394 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2395 EnqueueTask& _enq_task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2396 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2397 public: |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2398 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2399 AbstractGangTask("Enqueue reference objects in parallel"), |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2400 _enq_task(enq_task) { } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2401 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2402 virtual void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2403 _enq_task.work(worker_id); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2404 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2405 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2406 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2407 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2408 assert(_workers != NULL, "Need parallel worker threads."); |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2409 assert(_g1h->ref_processor_cm()->processing_is_mt(), "processing is not MT"); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2410 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2411 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2412 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2413 // Not strictly necessary but... |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2414 // |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2415 // We need to reset the concurrency level before each |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2416 // proxy task execution, so that the termination protocol |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2417 // and overflow handling in CMTask::do_marking_step() knows |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2418 // how many workers to wait for. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2419 _cm->set_concurrency(_active_workers); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2420 _g1h->set_par_threads(_active_workers); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2421 _workers->run_task(&enq_task_proxy); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2422 _g1h->set_par_threads(0); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2423 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2424 |
342 | 2425 void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) { |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2426 if (has_overflown()) { |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2427 // Skip processing the discovered references if we have |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2428 // overflown the global marking stack. Reference objects |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2429 // only get discovered once so it is OK to not |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2430 // de-populate the discovered reference lists. We could have, |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2431 // but the only benefit would be that, when marking restarts, |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2432 // less reference objects are discovered. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2433 return; |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2434 } |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2435 |
342 | 2436 ResourceMark rm; |
2437 HandleMark hm; | |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2438 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2439 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2440 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2441 // Is alive closure. |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2442 G1CMIsAliveClosure g1_is_alive(g1h); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2443 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2444 // Inner scope to exclude the cleaning of the string and symbol |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2445 // tables from the displayed time. |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2446 { |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
2447 if (G1Log::finer()) { |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2448 gclog_or_tty->put(' '); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2449 } |
10405 | 2450 GCTraceTime t("GC ref-proc", G1Log::finer(), false, g1h->gc_timer_cm()); |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2451 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2452 ReferenceProcessor* rp = g1h->ref_processor_cm(); |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2453 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2454 // See the comment in G1CollectedHeap::ref_processing_init() |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2455 // about how reference processing currently works in G1. |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2456 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2457 // Set the soft reference policy |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2458 rp->setup_policy(clear_all_soft_refs); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2459 assert(_markStack.isEmpty(), "mark stack should be empty"); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2460 |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2461 // Instances of the 'Keep Alive' and 'Complete GC' closures used |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2462 // in serial reference processing. Note these closures are also |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2463 // used for serially processing (by the the current thread) the |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2464 // JNI references during parallel reference processing. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2465 // |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2466 // These closures do not need to synchronize with the worker |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2467 // threads involved in parallel reference processing as these |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2468 // instances are executed serially by the current thread (e.g. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2469 // reference processing is not multi-threaded and is thus |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2470 // performed by the current thread instead of a gang worker). |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2471 // |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2472 // The gang tasks involved in parallel reference procssing create |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2473 // their own instances of these closures, which do their own |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2474 // synchronization among themselves. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2475 G1CMKeepAliveAndDrainClosure g1_keep_alive(this, task(0), true /* is_serial */); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2476 G1CMDrainMarkingStackClosure g1_drain_mark_stack(this, task(0), true /* is_serial */); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2477 |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2478 // We need at least one active thread. If reference processing |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2479 // is not multi-threaded we use the current (VMThread) thread, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2480 // otherwise we use the work gang from the G1CollectedHeap and |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2481 // we utilize all the worker threads we can. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2482 bool processing_is_mt = rp->processing_is_mt() && g1h->workers() != NULL; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2483 uint active_workers = (processing_is_mt ? g1h->workers()->active_workers() : 1U); |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2484 active_workers = MAX2(MIN2(active_workers, _max_worker_id), 1U); |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2485 |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2486 // Parallel processing task executor. |
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2487 G1CMRefProcTaskExecutor par_task_executor(g1h, this, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2488 g1h->workers(), active_workers); |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2489 AbstractRefProcTaskExecutor* executor = (processing_is_mt ? &par_task_executor : NULL); |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2490 |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2491 // Set the concurrency level. The phase was already set prior to |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2492 // executing the remark task. |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2493 set_concurrency(active_workers); |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2494 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2495 // Set the degree of MT processing here. If the discovery was done MT, |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2496 // the number of threads involved during discovery could differ from |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2497 // the number of active workers. This is OK as long as the discovered |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2498 // Reference lists are balanced (see balance_all_queues() and balance_queues()). |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2499 rp->set_active_mt_degree(active_workers); |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2500 |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2501 // Process the weak references. |
10405 | 2502 const ReferenceProcessorStats& stats = |
2503 rp->process_discovered_references(&g1_is_alive, | |
2504 &g1_keep_alive, | |
2505 &g1_drain_mark_stack, | |
2506 executor, | |
2507 g1h->gc_timer_cm()); | |
2508 g1h->gc_tracer_cm()->report_gc_reference_stats(stats); | |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2509 |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2510 // The do_oop work routines of the keep_alive and drain_marking_stack |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2511 // oop closures will set the has_overflown flag if we overflow the |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2512 // global marking stack. |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2513 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2514 assert(_markStack.overflow() || _markStack.isEmpty(), |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2515 "mark stack should be empty (unless it overflowed)"); |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2516 |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2517 if (_markStack.overflow()) { |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2518 // This should have been done already when we tried to push an |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2519 // entry on to the global mark stack. But let's do it again. |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2520 set_has_overflown(); |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2521 } |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2522 |
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2523 assert(rp->num_q() == active_workers, "why not"); |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2524 |
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
2525 rp->enqueue_discovered_references(executor); |
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2526 |
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2527 rp->verify_no_references_recorded(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2528 assert(!rp->discovery_enabled(), "Post condition"); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2529 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2530 |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13437
diff
changeset
|
2531 g1h->unlink_string_and_symbol_table(&g1_is_alive); |
342 | 2532 } |
2533 | |
2534 void ConcurrentMark::swapMarkBitMaps() { | |
2535 CMBitMapRO* temp = _prevMarkBitMap; | |
2536 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap; | |
2537 _nextMarkBitMap = (CMBitMap*) temp; | |
2538 } | |
2539 | |
2540 class CMRemarkTask: public AbstractGangTask { | |
2541 private: | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2542 ConcurrentMark* _cm; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2543 bool _is_serial; |
342 | 2544 public: |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2545 void work(uint worker_id) { |
342 | 2546 // Since all available tasks are actually started, we should |
2547 // only proceed if we're supposed to be actived. | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2548 if (worker_id < _cm->active_tasks()) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2549 CMTask* task = _cm->task(worker_id); |
342 | 2550 task->record_start_time(); |
2551 do { | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2552 task->do_marking_step(1000000000.0 /* something very large */, |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2553 true /* do_termination */, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2554 _is_serial); |
342 | 2555 } while (task->has_aborted() && !_cm->has_overflown()); |
2556 // If we overflow, then we do not want to restart. We instead | |
2557 // want to abort remark and do concurrent marking again. | |
2558 task->record_end_time(); | |
2559 } | |
2560 } | |
2561 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2562 CMRemarkTask(ConcurrentMark* cm, int active_workers, bool is_serial) : |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2563 AbstractGangTask("Par Remark"), _cm(cm), _is_serial(is_serial) { |
4711 | 2564 _cm->terminator()->reset_for_reuse(active_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2565 } |
342 | 2566 }; |
2567 | |
2568 void ConcurrentMark::checkpointRootsFinalWork() { | |
2569 ResourceMark rm; | |
2570 HandleMark hm; | |
2571 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
2572 | |
2573 g1h->ensure_parsability(false); | |
2574 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
2575 if (G1CollectedHeap::use_parallel_gc_threads()) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2576 G1CollectedHeap::StrongRootsScope srs(g1h); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2577 // this is remark, so we'll use up all active threads |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2578 uint active_workers = g1h->workers()->active_workers(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2579 if (active_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2580 assert(active_workers > 0, "Should have been set earlier"); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2581 active_workers = (uint) ParallelGCThreads; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2582 g1h->workers()->set_active_workers(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2583 } |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2584 set_concurrency_and_phase(active_workers, false /* concurrent */); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2585 // Leave _parallel_marking_threads at it's |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2586 // value originally calculated in the ConcurrentMark |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2587 // constructor and pass values of the active workers |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2588 // through the gang in the task. |
342 | 2589 |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2590 CMRemarkTask remarkTask(this, active_workers, false /* is_serial */); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2591 // We will start all available threads, even if we decide that the |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2592 // active_workers will be fewer. The extra ones will just bail out |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2593 // immediately. |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2594 g1h->set_par_threads(active_workers); |
342 | 2595 g1h->workers()->run_task(&remarkTask); |
2596 g1h->set_par_threads(0); | |
2597 } else { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2598 G1CollectedHeap::StrongRootsScope srs(g1h); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2599 uint active_workers = 1; |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
2600 set_concurrency_and_phase(active_workers, false /* concurrent */); |
342 | 2601 |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2602 // Note - if there's no work gang then the VMThread will be |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2603 // the thread to execute the remark - serially. We have |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2604 // to pass true for the is_serial parameter so that |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2605 // CMTask::do_marking_step() doesn't enter the sync |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2606 // barriers in the event of an overflow. Doing so will |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2607 // cause an assert that the current thread is not a |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2608 // concurrent GC thread. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
2609 CMRemarkTask remarkTask(this, active_workers, true /* is_serial*/); |
342 | 2610 remarkTask.work(0); |
2611 } | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2612 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
8789
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
2613 guarantee(has_overflown() || |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
2614 satb_mq_set.completed_buffers_num() == 0, |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
2615 err_msg("Invariant: has_overflown = %s, num buffers = %d", |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
2616 BOOL_TO_STR(has_overflown()), |
1179172e9ec9
8008301: G1: guarantee(satb_mq_set.completed_buffers_num() == 0) failure
johnc
parents:
8788
diff
changeset
|
2617 satb_mq_set.completed_buffers_num())); |
342 | 2618 |
2619 print_stats(); | |
2620 } | |
2621 | |
1044 | 2622 #ifndef PRODUCT |
2623 | |
1388 | 2624 class PrintReachableOopClosure: public OopClosure { |
342 | 2625 private: |
2626 G1CollectedHeap* _g1h; | |
2627 outputStream* _out; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2628 VerifyOption _vo; |
1388 | 2629 bool _all; |
342 | 2630 |
2631 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2632 PrintReachableOopClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2633 VerifyOption vo, |
1388 | 2634 bool all) : |
1044 | 2635 _g1h(G1CollectedHeap::heap()), |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2636 _out(out), _vo(vo), _all(all) { } |
342 | 2637 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2638 void do_oop(narrowOop* p) { do_oop_work(p); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2639 void do_oop( oop* p) { do_oop_work(p); } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2640 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2641 template <class T> void do_oop_work(T* p) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2642 oop obj = oopDesc::load_decode_heap_oop(p); |
342 | 2643 const char* str = NULL; |
2644 const char* str2 = ""; | |
2645 | |
1388 | 2646 if (obj == NULL) { |
2647 str = ""; | |
2648 } else if (!_g1h->is_in_g1_reserved(obj)) { | |
2649 str = " O"; | |
2650 } else { | |
342 | 2651 HeapRegion* hr = _g1h->heap_region_containing(obj); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2652 guarantee(hr != NULL, "invariant"); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2653 bool over_tams = _g1h->allocated_since_marking(obj, hr, _vo); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2654 bool marked = _g1h->is_marked(obj, _vo); |
1044 | 2655 |
2656 if (over_tams) { | |
1388 | 2657 str = " >"; |
2658 if (marked) { | |
342 | 2659 str2 = " AND MARKED"; |
1044 | 2660 } |
1388 | 2661 } else if (marked) { |
2662 str = " M"; | |
1044 | 2663 } else { |
1388 | 2664 str = " NOT"; |
1044 | 2665 } |
342 | 2666 } |
2667 | |
1388 | 2668 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s", |
342 | 2669 p, (void*) obj, str, str2); |
2670 } | |
2671 }; | |
2672 | |
1388 | 2673 class PrintReachableObjectClosure : public ObjectClosure { |
342 | 2674 private: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2675 G1CollectedHeap* _g1h; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2676 outputStream* _out; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2677 VerifyOption _vo; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2678 bool _all; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2679 HeapRegion* _hr; |
342 | 2680 |
2681 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2682 PrintReachableObjectClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2683 VerifyOption vo, |
1388 | 2684 bool all, |
2685 HeapRegion* hr) : | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2686 _g1h(G1CollectedHeap::heap()), |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2687 _out(out), _vo(vo), _all(all), _hr(hr) { } |
1388 | 2688 |
2689 void do_object(oop o) { | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2690 bool over_tams = _g1h->allocated_since_marking(o, _hr, _vo); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2691 bool marked = _g1h->is_marked(o, _vo); |
1388 | 2692 bool print_it = _all || over_tams || marked; |
2693 | |
2694 if (print_it) { | |
2695 _out->print_cr(" "PTR_FORMAT"%s", | |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12229
diff
changeset
|
2696 (void *)o, (over_tams) ? " >" : (marked) ? " M" : ""); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2697 PrintReachableOopClosure oopCl(_out, _vo, _all); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6254
diff
changeset
|
2698 o->oop_iterate_no_header(&oopCl); |
1388 | 2699 } |
342 | 2700 } |
2701 }; | |
2702 | |
1388 | 2703 class PrintReachableRegionClosure : public HeapRegionClosure { |
342 | 2704 private: |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2705 G1CollectedHeap* _g1h; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2706 outputStream* _out; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2707 VerifyOption _vo; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2708 bool _all; |
342 | 2709 |
2710 public: | |
2711 bool doHeapRegion(HeapRegion* hr) { | |
2712 HeapWord* b = hr->bottom(); | |
2713 HeapWord* e = hr->end(); | |
2714 HeapWord* t = hr->top(); | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2715 HeapWord* p = _g1h->top_at_mark_start(hr, _vo); |
342 | 2716 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" " |
1044 | 2717 "TAMS: "PTR_FORMAT, b, e, t, p); |
1388 | 2718 _out->cr(); |
2719 | |
2720 HeapWord* from = b; | |
2721 HeapWord* to = t; | |
2722 | |
2723 if (to > from) { | |
2724 _out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to); | |
2725 _out->cr(); | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2726 PrintReachableObjectClosure ocl(_out, _vo, _all, hr); |
1388 | 2727 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl); |
2728 _out->cr(); | |
2729 } | |
342 | 2730 |
2731 return false; | |
2732 } | |
2733 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2734 PrintReachableRegionClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2735 VerifyOption vo, |
1388 | 2736 bool all) : |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2737 _g1h(G1CollectedHeap::heap()), _out(out), _vo(vo), _all(all) { } |
342 | 2738 }; |
2739 | |
1388 | 2740 void ConcurrentMark::print_reachable(const char* str, |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2741 VerifyOption vo, |
1388 | 2742 bool all) { |
2743 gclog_or_tty->cr(); | |
2744 gclog_or_tty->print_cr("== Doing heap dump... "); | |
1044 | 2745 |
2746 if (G1PrintReachableBaseFile == NULL) { | |
2747 gclog_or_tty->print_cr(" #### error: no base file defined"); | |
2748 return; | |
2749 } | |
2750 | |
2751 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) > | |
2752 (JVM_MAXPATHLEN - 1)) { | |
2753 gclog_or_tty->print_cr(" #### error: file name too long"); | |
2754 return; | |
2755 } | |
2756 | |
2757 char file_name[JVM_MAXPATHLEN]; | |
2758 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str); | |
2759 gclog_or_tty->print_cr(" dumping to file %s", file_name); | |
2760 | |
2761 fileStream fout(file_name); | |
2762 if (!fout.is_open()) { | |
2763 gclog_or_tty->print_cr(" #### error: could not open file"); | |
2764 return; | |
2765 } | |
2766 | |
2767 outputStream* out = &fout; | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2768 out->print_cr("-- USING %s", _g1h->top_at_mark_start_str(vo)); |
1044 | 2769 out->cr(); |
2770 | |
1388 | 2771 out->print_cr("--- ITERATING OVER REGIONS"); |
1044 | 2772 out->cr(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2773 PrintReachableRegionClosure rcl(out, vo, all); |
1388 | 2774 _g1h->heap_region_iterate(&rcl); |
1044 | 2775 out->cr(); |
2776 | |
2777 gclog_or_tty->print_cr(" done"); | |
1388 | 2778 gclog_or_tty->flush(); |
342 | 2779 } |
2780 | |
1044 | 2781 #endif // PRODUCT |
2782 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2783 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) { |
342 | 2784 // Note we are overriding the read-only view of the prev map here, via |
2785 // the cast. | |
2786 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2787 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2788 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2789 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) { |
342 | 2790 _nextMarkBitMap->clearRange(mr); |
2791 } | |
2792 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2793 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2794 clearRangePrevBitmap(mr); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2795 clearRangeNextBitmap(mr); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2796 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2797 |
342 | 2798 HeapRegion* |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2799 ConcurrentMark::claim_region(uint worker_id) { |
342 | 2800 // "checkpoint" the finger |
2801 HeapWord* finger = _finger; | |
2802 | |
2803 // _heap_end will not change underneath our feet; it only changes at | |
2804 // yield points. | |
2805 while (finger < _heap_end) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2806 assert(_g1h->is_in_g1_reserved(finger), "invariant"); |
342 | 2807 |
3771 | 2808 // Note on how this code handles humongous regions. In the |
2809 // normal case the finger will reach the start of a "starts | |
2810 // humongous" (SH) region. Its end will either be the end of the | |
2811 // last "continues humongous" (CH) region in the sequence, or the | |
2812 // standard end of the SH region (if the SH is the only region in | |
2813 // the sequence). That way claim_region() will skip over the CH | |
2814 // regions. However, there is a subtle race between a CM thread | |
2815 // executing this method and a mutator thread doing a humongous | |
2816 // object allocation. The two are not mutually exclusive as the CM | |
2817 // thread does not need to hold the Heap_lock when it gets | |
2818 // here. So there is a chance that claim_region() will come across | |
2819 // a free region that's in the progress of becoming a SH or a CH | |
2820 // region. In the former case, it will either | |
2821 // a) Miss the update to the region's end, in which case it will | |
2822 // visit every subsequent CH region, will find their bitmaps | |
2823 // empty, and do nothing, or | |
2824 // b) Will observe the update of the region's end (in which case | |
2825 // it will skip the subsequent CH regions). | |
2826 // If it comes across a region that suddenly becomes CH, the | |
2827 // scenario will be similar to b). So, the race between | |
2828 // claim_region() and a humongous object allocation might force us | |
2829 // to do a bit of unnecessary work (due to some unnecessary bitmap | |
2830 // iterations) but it should not introduce and correctness issues. | |
2831 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger); | |
342 | 2832 HeapWord* bottom = curr_region->bottom(); |
2833 HeapWord* end = curr_region->end(); | |
2834 HeapWord* limit = curr_region->next_top_at_mark_start(); | |
2835 | |
3771 | 2836 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2837 gclog_or_tty->print_cr("[%u] curr_region = "PTR_FORMAT" " |
342 | 2838 "["PTR_FORMAT", "PTR_FORMAT"), " |
2839 "limit = "PTR_FORMAT, | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2840 worker_id, curr_region, bottom, end, limit); |
3771 | 2841 } |
2842 | |
2843 // Is the gap between reading the finger and doing the CAS too long? | |
2844 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger); | |
342 | 2845 if (res == finger) { |
2846 // we succeeded | |
2847 | |
2848 // notice that _finger == end cannot be guaranteed here since, | |
2849 // someone else might have moved the finger even further | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2850 assert(_finger >= end, "the finger should have moved forward"); |
342 | 2851 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2852 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2853 gclog_or_tty->print_cr("[%u] we were successful with region = " |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2854 PTR_FORMAT, worker_id, curr_region); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2855 } |
342 | 2856 |
2857 if (limit > bottom) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2858 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2859 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is not empty, " |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2860 "returning it ", worker_id, curr_region); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2861 } |
342 | 2862 return curr_region; |
2863 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2864 assert(limit == bottom, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2865 "the region limit should be at bottom"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2866 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2867 gclog_or_tty->print_cr("[%u] region "PTR_FORMAT" is empty, " |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2868 "returning NULL", worker_id, curr_region); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2869 } |
342 | 2870 // we return NULL and the caller should try calling |
2871 // claim_region() again. | |
2872 return NULL; | |
2873 } | |
2874 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2875 assert(_finger > finger, "the finger should have moved forward"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2876 if (verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2877 gclog_or_tty->print_cr("[%u] somebody else moved the finger, " |
342 | 2878 "global finger = "PTR_FORMAT", " |
2879 "our finger = "PTR_FORMAT, | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2880 worker_id, _finger, finger); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2881 } |
342 | 2882 |
2883 // read it again | |
2884 finger = _finger; | |
2885 } | |
2886 } | |
2887 | |
2888 return NULL; | |
2889 } | |
2890 | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2891 #ifndef PRODUCT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2892 enum VerifyNoCSetOopsPhase { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2893 VerifyNoCSetOopsStack, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2894 VerifyNoCSetOopsQueues, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2895 VerifyNoCSetOopsSATBCompleted, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2896 VerifyNoCSetOopsSATBThread |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2897 }; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2898 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2899 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2900 private: |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2901 G1CollectedHeap* _g1h; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2902 VerifyNoCSetOopsPhase _phase; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2903 int _info; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2904 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2905 const char* phase_str() { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2906 switch (_phase) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2907 case VerifyNoCSetOopsStack: return "Stack"; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2908 case VerifyNoCSetOopsQueues: return "Queue"; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2909 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers"; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2910 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers"; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2911 default: ShouldNotReachHere(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2912 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2913 return NULL; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2914 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2915 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2916 void do_object_work(oop obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2917 guarantee(!_g1h->obj_in_cs(obj), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2918 err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d", |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2919 (void*) obj, phase_str(), _info)); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2920 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2921 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2922 public: |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2923 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2924 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2925 void set_phase(VerifyNoCSetOopsPhase phase, int info = -1) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2926 _phase = phase; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2927 _info = info; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2928 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2929 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2930 virtual void do_oop(oop* p) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2931 oop obj = oopDesc::load_decode_heap_oop(p); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2932 do_object_work(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2933 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2934 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2935 virtual void do_oop(narrowOop* p) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2936 // We should not come across narrow oops while scanning marking |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2937 // stacks and SATB buffers. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2938 ShouldNotReachHere(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2939 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2940 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2941 virtual void do_object(oop obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2942 do_object_work(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2943 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2944 }; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2945 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2946 void ConcurrentMark::verify_no_cset_oops(bool verify_stacks, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2947 bool verify_enqueued_buffers, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2948 bool verify_thread_buffers, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2949 bool verify_fingers) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2950 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2951 if (!G1CollectedHeap::heap()->mark_in_progress()) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2952 return; |
342 | 2953 } |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2954 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2955 VerifyNoCSetOopsClosure cl; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2956 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2957 if (verify_stacks) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2958 // Verify entries on the global mark stack |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2959 cl.set_phase(VerifyNoCSetOopsStack); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2960 _markStack.oops_do(&cl); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2961 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2962 // Verify entries on the task queues |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
2963 for (uint i = 0; i < _max_worker_id; i += 1) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2964 cl.set_phase(VerifyNoCSetOopsQueues, i); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6865
diff
changeset
|
2965 CMTaskQueue* queue = _task_queues->queue(i); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2966 queue->oops_do(&cl); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2967 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2968 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2969 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2970 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2971 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2972 // Verify entries on the enqueued SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2973 if (verify_enqueued_buffers) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2974 cl.set_phase(VerifyNoCSetOopsSATBCompleted); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2975 satb_qs.iterate_completed_buffers_read_only(&cl); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2976 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2977 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2978 // Verify entries on the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2979 if (verify_thread_buffers) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2980 cl.set_phase(VerifyNoCSetOopsSATBThread); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2981 satb_qs.iterate_thread_buffers_read_only(&cl); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2982 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2983 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2984 if (verify_fingers) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2985 // Verify the global finger |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2986 HeapWord* global_finger = finger(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2987 if (global_finger != NULL && global_finger < _heap_end) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2988 // The global finger always points to a heap region boundary. We |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2989 // use heap_region_containing_raw() to get the containing region |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2990 // given that the global finger could be pointing to a free region |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2991 // which subsequently becomes continues humongous. If that |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2992 // happens, heap_region_containing() will return the bottom of the |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2993 // corresponding starts humongous region and the check below will |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2994 // not hold any more. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2995 HeapRegion* global_hr = _g1h->heap_region_containing_raw(global_finger); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2996 guarantee(global_finger == global_hr->bottom(), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2997 err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2998 global_finger, HR_FORMAT_PARAMS(global_hr))); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2999 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3000 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3001 // Verify the task fingers |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3002 assert(parallel_marking_threads() <= _max_worker_id, "sanity"); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3003 for (int i = 0; i < (int) parallel_marking_threads(); i += 1) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3004 CMTask* task = _tasks[i]; |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3005 HeapWord* task_finger = task->finger(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3006 if (task_finger != NULL && task_finger < _heap_end) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3007 // See above note on the global finger verification. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3008 HeapRegion* task_hr = _g1h->heap_region_containing_raw(task_finger); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3009 guarantee(task_finger == task_hr->bottom() || |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3010 !task_hr->in_collection_set(), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3011 err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3012 task_finger, HR_FORMAT_PARAMS(task_hr))); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3013 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3014 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3015 } |
342 | 3016 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
3017 #endif // PRODUCT |
342 | 3018 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3019 // Aggregate the counting data that was constructed concurrently |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3020 // with marking. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3021 class AggregateCountDataHRClosure: public HeapRegionClosure { |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3022 G1CollectedHeap* _g1h; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3023 ConcurrentMark* _cm; |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3024 CardTableModRefBS* _ct_bs; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3025 BitMap* _cm_card_bm; |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3026 uint _max_worker_id; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3027 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3028 public: |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3029 AggregateCountDataHRClosure(G1CollectedHeap* g1h, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3030 BitMap* cm_card_bm, |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3031 uint max_worker_id) : |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3032 _g1h(g1h), _cm(g1h->concurrent_mark()), |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3033 _ct_bs((CardTableModRefBS*) (g1h->barrier_set())), |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3034 _cm_card_bm(cm_card_bm), _max_worker_id(max_worker_id) { } |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3035 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3036 bool doHeapRegion(HeapRegion* hr) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3037 if (hr->continuesHumongous()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3038 // We will ignore these here and process them when their |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3039 // associated "starts humongous" region is processed. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3040 // Note that we cannot rely on their associated |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3041 // "starts humongous" region to have their bit set to 1 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3042 // since, due to the region chunking in the parallel region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3043 // iteration, a "continues humongous" region might be visited |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3044 // before its associated "starts humongous". |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3045 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3046 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3047 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3048 HeapWord* start = hr->bottom(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3049 HeapWord* limit = hr->next_top_at_mark_start(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3050 HeapWord* end = hr->end(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3051 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3052 assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3053 err_msg("Preconditions not met - " |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3054 "start: "PTR_FORMAT", limit: "PTR_FORMAT", " |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3055 "top: "PTR_FORMAT", end: "PTR_FORMAT, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3056 start, limit, hr->top(), hr->end())); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3057 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3058 assert(hr->next_marked_bytes() == 0, "Precondition"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3059 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3060 if (start == limit) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3061 // NTAMS of this region has not been set so nothing to do. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3062 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3063 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3064 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3065 // 'start' should be in the heap. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3066 assert(_g1h->is_in_g1_reserved(start) && _ct_bs->is_card_aligned(start), "sanity"); |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3067 // 'end' *may* be just beyone the end of the heap (if hr is the last region) |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3068 assert(!_g1h->is_in_g1_reserved(end) || _ct_bs->is_card_aligned(end), "sanity"); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3069 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3070 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3071 BitMap::idx_t limit_idx = _cm->card_bitmap_index_for(limit); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3072 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(end); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3073 |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3074 // If ntams is not card aligned then we bump card bitmap index |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3075 // for limit so that we get the all the cards spanned by |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3076 // the object ending at ntams. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3077 // Note: if this is the last region in the heap then ntams |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3078 // could be actually just beyond the end of the the heap; |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3079 // limit_idx will then correspond to a (non-existent) card |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3080 // that is also outside the heap. |
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3081 if (_g1h->is_in_g1_reserved(limit) && !_ct_bs->is_card_aligned(limit)) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3082 limit_idx += 1; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3083 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3084 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3085 assert(limit_idx <= end_idx, "or else use atomics"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3086 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3087 // Aggregate the "stripe" in the count data associated with hr. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3088 uint hrs_index = hr->hrs_index(); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3089 size_t marked_bytes = 0; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3090 |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3091 for (uint i = 0; i < _max_worker_id; i += 1) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3092 size_t* marked_bytes_array = _cm->count_marked_bytes_array_for(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3093 BitMap* task_card_bm = _cm->count_card_bitmap_for(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3094 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3095 // Fetch the marked_bytes in this region for task i and |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3096 // add it to the running total for this region. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3097 marked_bytes += marked_bytes_array[hrs_index]; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3098 |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3099 // Now union the bitmaps[0,max_worker_id)[start_idx..limit_idx) |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3100 // into the global card bitmap. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3101 BitMap::idx_t scan_idx = task_card_bm->get_next_one_offset(start_idx, limit_idx); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3102 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3103 while (scan_idx < limit_idx) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3104 assert(task_card_bm->at(scan_idx) == true, "should be"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3105 _cm_card_bm->set_bit(scan_idx); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3106 assert(_cm_card_bm->at(scan_idx) == true, "should be"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3107 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3108 // BitMap::get_next_one_offset() can handle the case when |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3109 // its left_offset parameter is greater than its right_offset |
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6750
diff
changeset
|
3110 // parameter. It does, however, have an early exit if |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3111 // left_offset == right_offset. So let's limit the value |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3112 // passed in for left offset here. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3113 BitMap::idx_t next_idx = MIN2(scan_idx + 1, limit_idx); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3114 scan_idx = task_card_bm->get_next_one_offset(next_idx, limit_idx); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3115 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3116 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3117 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3118 // Update the marked bytes for this region. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3119 hr->add_to_marked_bytes(marked_bytes); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3120 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3121 // Next heap region |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3122 return false; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3123 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3124 }; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3125 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3126 class G1AggregateCountDataTask: public AbstractGangTask { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3127 protected: |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3128 G1CollectedHeap* _g1h; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3129 ConcurrentMark* _cm; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3130 BitMap* _cm_card_bm; |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3131 uint _max_worker_id; |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3132 int _active_workers; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3133 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3134 public: |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3135 G1AggregateCountDataTask(G1CollectedHeap* g1h, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3136 ConcurrentMark* cm, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3137 BitMap* cm_card_bm, |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3138 uint max_worker_id, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3139 int n_workers) : |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3140 AbstractGangTask("Count Aggregation"), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3141 _g1h(g1h), _cm(cm), _cm_card_bm(cm_card_bm), |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3142 _max_worker_id(max_worker_id), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3143 _active_workers(n_workers) { } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3144 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3145 void work(uint worker_id) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3146 AggregateCountDataHRClosure cl(_g1h, _cm_card_bm, _max_worker_id); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3147 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3148 if (G1CollectedHeap::use_parallel_gc_threads()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3149 _g1h->heap_region_par_iterate_chunked(&cl, worker_id, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3150 _active_workers, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3151 HeapRegion::AggregateCountClaimValue); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3152 } else { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3153 _g1h->heap_region_iterate(&cl); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3154 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3155 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3156 }; |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3157 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3158 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3159 void ConcurrentMark::aggregate_count_data() { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3160 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3161 _g1h->workers()->active_workers() : |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3162 1); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3163 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3164 G1AggregateCountDataTask g1_par_agg_task(_g1h, this, &_card_bm, |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3165 _max_worker_id, n_workers); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3166 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3167 if (G1CollectedHeap::use_parallel_gc_threads()) { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3168 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3169 "sanity check"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3170 _g1h->set_par_threads(n_workers); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3171 _g1h->workers()->run_task(&g1_par_agg_task); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3172 _g1h->set_par_threads(0); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3173 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3174 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3175 "sanity check"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3176 _g1h->reset_heap_region_claim_values(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3177 } else { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3178 g1_par_agg_task.work(0); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3179 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3180 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3181 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3182 // Clear the per-worker arrays used to store the per-region counting data |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3183 void ConcurrentMark::clear_all_count_data() { |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3184 // Clear the global card bitmap - it will be filled during |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3185 // liveness count aggregation (during remark) and the |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3186 // final counting task. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3187 _card_bm.clear(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3188 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3189 // Clear the global region bitmap - it will be filled as part |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3190 // of the final counting task. |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3191 _region_bm.clear(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3192 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3193 uint max_regions = _g1h->max_regions(); |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3194 assert(_max_worker_id > 0, "uninitialized"); |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3195 |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3196 for (uint i = 0; i < _max_worker_id; i += 1) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3197 BitMap* task_card_bm = count_card_bitmap_for(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3198 size_t* marked_bytes_array = count_marked_bytes_array_for(i); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3199 |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3200 assert(task_card_bm->size() == _card_bm.size(), "size mismatch"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3201 assert(marked_bytes_array != NULL, "uninitialized"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3202 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3203 memset(marked_bytes_array, 0, (size_t) max_regions * sizeof(size_t)); |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3204 task_card_bm->clear(); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3205 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3206 } |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3207 |
342 | 3208 void ConcurrentMark::print_stats() { |
3209 if (verbose_stats()) { | |
3210 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
3211 for (size_t i = 0; i < _active_tasks; ++i) { | |
3212 _tasks[i]->print_stats(); | |
3213 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
3214 } | |
3215 } | |
3216 } | |
3217 | |
3218 // abandon current marking iteration due to a Full GC | |
3219 void ConcurrentMark::abort() { | |
3220 // Clear all marks to force marking thread to do nothing | |
3221 _nextMarkBitMap->clearAll(); | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3222 // Clear the liveness counting data |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3223 clear_all_count_data(); |
342 | 3224 // Empty mark stack |
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
3225 reset_marking_state(); |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3226 for (uint i = 0; i < _max_worker_id; ++i) { |
342 | 3227 _tasks[i]->clear_region_fields(); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3228 } |
342 | 3229 _has_aborted = true; |
3230 | |
3231 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3232 satb_mq_set.abandon_partial_marking(); | |
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3233 // This can be called either during or outside marking, we'll read |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3234 // the expected_active value from the SATB queue set. |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3235 satb_mq_set.set_active_all_threads( |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3236 false, /* new active value */ |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3237 satb_mq_set.is_active() /* expected_active */); |
10405 | 3238 |
3239 _g1h->trace_heap_after_concurrent_cycle(); | |
3240 _g1h->register_concurrent_cycle_end(); | |
342 | 3241 } |
3242 | |
3243 static void print_ms_time_info(const char* prefix, const char* name, | |
3244 NumberSeq& ns) { | |
3245 gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).", | |
3246 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg()); | |
3247 if (ns.num() > 0) { | |
3248 gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]", | |
3249 prefix, ns.sd(), ns.maximum()); | |
3250 } | |
3251 } | |
3252 | |
3253 void ConcurrentMark::print_summary_info() { | |
3254 gclog_or_tty->print_cr(" Concurrent marking:"); | |
3255 print_ms_time_info(" ", "init marks", _init_times); | |
3256 print_ms_time_info(" ", "remarks", _remark_times); | |
3257 { | |
3258 print_ms_time_info(" ", "final marks", _remark_mark_times); | |
3259 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times); | |
3260 | |
3261 } | |
3262 print_ms_time_info(" ", "cleanups", _cleanup_times); | |
3263 gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).", | |
3264 _total_counting_time, | |
3265 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 / | |
3266 (double)_cleanup_times.num() | |
3267 : 0.0)); | |
3268 if (G1ScrubRemSets) { | |
3269 gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).", | |
3270 _total_rs_scrub_time, | |
3271 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 / | |
3272 (double)_cleanup_times.num() | |
3273 : 0.0)); | |
3274 } | |
3275 gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.", | |
3276 (_init_times.sum() + _remark_times.sum() + | |
3277 _cleanup_times.sum())/1000.0); | |
3278 gclog_or_tty->print_cr(" Total concurrent time = %8.2f s " | |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3279 "(%8.2f s marking).", |
342 | 3280 cmThread()->vtime_accum(), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3281 cmThread()->vtime_mark_accum()); |
342 | 3282 } |
3283 | |
1019 | 3284 void ConcurrentMark::print_worker_threads_on(outputStream* st) const { |
8008
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
8006
diff
changeset
|
3285 if (use_parallel_marking_threads()) { |
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
8006
diff
changeset
|
3286 _parallel_workers->print_worker_threads_on(st); |
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
8006
diff
changeset
|
3287 } |
1019 | 3288 } |
3289 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3290 void ConcurrentMark::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3291 st->print_cr("Marking Bits (Prev, Next): (CMBitMap*) " PTR_FORMAT ", (CMBitMap*) " PTR_FORMAT, |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3292 _prevMarkBitMap, _nextMarkBitMap); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3293 _prevMarkBitMap->print_on_error(st, " Prev Bits: "); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3294 _nextMarkBitMap->print_on_error(st, " Next Bits: "); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3295 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8789
diff
changeset
|
3296 |
342 | 3297 // We take a break if someone is trying to stop the world. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3298 bool ConcurrentMark::do_yield_check(uint worker_id) { |
342 | 3299 if (should_yield()) { |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3300 if (worker_id == 0) { |
342 | 3301 _g1h->g1_policy()->record_concurrent_pause(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3302 } |
342 | 3303 cmThread()->yield(); |
3304 return true; | |
3305 } else { | |
3306 return false; | |
3307 } | |
3308 } | |
3309 | |
3310 bool ConcurrentMark::should_yield() { | |
3311 return cmThread()->should_yield(); | |
3312 } | |
3313 | |
3314 bool ConcurrentMark::containing_card_is_marked(void* p) { | |
3315 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1); | |
3316 return _card_bm.at(offset >> CardTableModRefBS::card_shift); | |
3317 } | |
3318 | |
3319 bool ConcurrentMark::containing_cards_are_marked(void* start, | |
3320 void* last) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3321 return containing_card_is_marked(start) && |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3322 containing_card_is_marked(last); |
342 | 3323 } |
3324 | |
3325 #ifndef PRODUCT | |
3326 // for debugging purposes | |
3327 void ConcurrentMark::print_finger() { | |
3328 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT, | |
3329 _heap_start, _heap_end, _finger); | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3330 for (uint i = 0; i < _max_worker_id; ++i) { |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3331 gclog_or_tty->print(" %u: "PTR_FORMAT, i, _tasks[i]->finger()); |
342 | 3332 } |
3333 gclog_or_tty->print_cr(""); | |
3334 } | |
3335 #endif | |
3336 | |
3771 | 3337 void CMTask::scan_object(oop obj) { |
3338 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant"); | |
3339 | |
3340 if (_cm->verbose_high()) { | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3341 gclog_or_tty->print_cr("[%u] we're scanning object "PTR_FORMAT, |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3342 _worker_id, (void*) obj); |
3771 | 3343 } |
3344 | |
3345 size_t obj_size = obj->size(); | |
3346 _words_scanned += obj_size; | |
3347 | |
3348 obj->oop_iterate(_cm_oop_closure); | |
3349 statsOnly( ++_objs_scanned ); | |
3350 check_limits(); | |
3351 } | |
3352 | |
342 | 3353 // Closure for iteration over bitmaps |
3354 class CMBitMapClosure : public BitMapClosure { | |
3355 private: | |
3356 // the bitmap that is being iterated over | |
3357 CMBitMap* _nextMarkBitMap; | |
3358 ConcurrentMark* _cm; | |
3359 CMTask* _task; | |
3360 | |
3361 public: | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3362 CMBitMapClosure(CMTask *task, ConcurrentMark* cm, CMBitMap* nextMarkBitMap) : |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3363 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { } |
342 | 3364 |
3365 bool do_bit(size_t offset) { | |
3366 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3367 assert(_nextMarkBitMap->isMarked(addr), "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3368 assert( addr < _cm->finger(), "invariant"); |
342 | 3369 |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3370 statsOnly( _task->increase_objs_found_on_bitmap() ); |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3371 assert(addr >= _task->finger(), "invariant"); |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3372 |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3373 // We move that task's local finger along. |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3374 _task->move_finger_to(addr); |
342 | 3375 |
3376 _task->scan_object(oop(addr)); | |
3377 // we only partially drain the local queue and global stack | |
3378 _task->drain_local_queue(true); | |
3379 _task->drain_global_stack(true); | |
3380 | |
3381 // if the has_aborted flag has been raised, we need to bail out of | |
3382 // the iteration | |
3383 return !_task->has_aborted(); | |
3384 } | |
3385 }; | |
3386 | |
3387 // Closure for iterating over objects, currently only used for | |
3388 // processing SATB buffers. | |
3389 class CMObjectClosure : public ObjectClosure { | |
3390 private: | |
3391 CMTask* _task; | |
3392 | |
3393 public: | |
3394 void do_object(oop obj) { | |
3395 _task->deal_with_reference(obj); | |
3396 } | |
3397 | |
3398 CMObjectClosure(CMTask* task) : _task(task) { } | |
3399 }; | |
3400 | |
3771 | 3401 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h, |
3402 ConcurrentMark* cm, | |
3403 CMTask* task) | |
3404 : _g1h(g1h), _cm(cm), _task(task) { | |
3405 assert(_ref_processor == NULL, "should be initialized to NULL"); | |
3406 | |
3407 if (G1UseConcMarkReferenceProcessing) { | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
3408 _ref_processor = g1h->ref_processor_cm(); |
3771 | 3409 assert(_ref_processor != NULL, "should not be NULL"); |
342 | 3410 } |
3771 | 3411 } |
342 | 3412 |
3413 void CMTask::setup_for_region(HeapRegion* hr) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3414 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3415 assert(hr != NULL, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3416 "claim_region() should have filtered out continues humongous regions"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3417 assert(!hr->continuesHumongous(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3418 "claim_region() should have filtered out continues humongous regions"); |
342 | 3419 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3420 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3421 gclog_or_tty->print_cr("[%u] setting up for region "PTR_FORMAT, |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3422 _worker_id, hr); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3423 } |
342 | 3424 |
3425 _curr_region = hr; | |
3426 _finger = hr->bottom(); | |
3427 update_region_limit(); | |
3428 } | |
3429 | |
3430 void CMTask::update_region_limit() { | |
3431 HeapRegion* hr = _curr_region; | |
3432 HeapWord* bottom = hr->bottom(); | |
3433 HeapWord* limit = hr->next_top_at_mark_start(); | |
3434 | |
3435 if (limit == bottom) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3436 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3437 gclog_or_tty->print_cr("[%u] found an empty region " |
342 | 3438 "["PTR_FORMAT", "PTR_FORMAT")", |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3439 _worker_id, bottom, limit); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3440 } |
342 | 3441 // The region was collected underneath our feet. |
3442 // We set the finger to bottom to ensure that the bitmap | |
3443 // iteration that will follow this will not do anything. | |
3444 // (this is not a condition that holds when we set the region up, | |
3445 // as the region is not supposed to be empty in the first place) | |
3446 _finger = bottom; | |
3447 } else if (limit >= _region_limit) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3448 assert(limit >= _finger, "peace of mind"); |
342 | 3449 } else { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3450 assert(limit < _region_limit, "only way to get here"); |
342 | 3451 // This can happen under some pretty unusual circumstances. An |
3452 // evacuation pause empties the region underneath our feet (NTAMS | |
3453 // at bottom). We then do some allocation in the region (NTAMS | |
3454 // stays at bottom), followed by the region being used as a GC | |
3455 // alloc region (NTAMS will move to top() and the objects | |
3456 // originally below it will be grayed). All objects now marked in | |
3457 // the region are explicitly grayed, if below the global finger, | |
3458 // and we do not need in fact to scan anything else. So, we simply | |
3459 // set _finger to be limit to ensure that the bitmap iteration | |
3460 // doesn't do anything. | |
3461 _finger = limit; | |
3462 } | |
3463 | |
3464 _region_limit = limit; | |
3465 } | |
3466 | |
3467 void CMTask::giveup_current_region() { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3468 assert(_curr_region != NULL, "invariant"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3469 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3470 gclog_or_tty->print_cr("[%u] giving up region "PTR_FORMAT, |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3471 _worker_id, _curr_region); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3472 } |
342 | 3473 clear_region_fields(); |
3474 } | |
3475 | |
3476 void CMTask::clear_region_fields() { | |
3477 // Values for these three fields that indicate that we're not | |
3478 // holding on to a region. | |
3479 _curr_region = NULL; | |
3480 _finger = NULL; | |
3481 _region_limit = NULL; | |
3482 } | |
3483 | |
3771 | 3484 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) { |
3485 if (cm_oop_closure == NULL) { | |
3486 assert(_cm_oop_closure != NULL, "invariant"); | |
3487 } else { | |
3488 assert(_cm_oop_closure == NULL, "invariant"); | |
3489 } | |
3490 _cm_oop_closure = cm_oop_closure; | |
3491 } | |
3492 | |
342 | 3493 void CMTask::reset(CMBitMap* nextMarkBitMap) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3494 guarantee(nextMarkBitMap != NULL, "invariant"); |
342 | 3495 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3496 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3497 gclog_or_tty->print_cr("[%u] resetting", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3498 } |
342 | 3499 |
3500 _nextMarkBitMap = nextMarkBitMap; | |
3501 clear_region_fields(); | |
3502 | |
3503 _calls = 0; | |
3504 _elapsed_time_ms = 0.0; | |
3505 _termination_time_ms = 0.0; | |
3506 _termination_start_time_ms = 0.0; | |
3507 | |
3508 #if _MARKING_STATS_ | |
3509 _local_pushes = 0; | |
3510 _local_pops = 0; | |
3511 _local_max_size = 0; | |
3512 _objs_scanned = 0; | |
3513 _global_pushes = 0; | |
3514 _global_pops = 0; | |
3515 _global_max_size = 0; | |
3516 _global_transfers_to = 0; | |
3517 _global_transfers_from = 0; | |
3518 _regions_claimed = 0; | |
3519 _objs_found_on_bitmap = 0; | |
3520 _satb_buffers_processed = 0; | |
3521 _steal_attempts = 0; | |
3522 _steals = 0; | |
3523 _aborted = 0; | |
3524 _aborted_overflow = 0; | |
3525 _aborted_cm_aborted = 0; | |
3526 _aborted_yield = 0; | |
3527 _aborted_timed_out = 0; | |
3528 _aborted_satb = 0; | |
3529 _aborted_termination = 0; | |
3530 #endif // _MARKING_STATS_ | |
3531 } | |
3532 | |
3533 bool CMTask::should_exit_termination() { | |
3534 regular_clock_call(); | |
3535 // This is called when we are in the termination protocol. We should | |
3536 // quit if, for some reason, this task wants to abort or the global | |
3537 // stack is not empty (this means that we can get work from it). | |
3538 return !_cm->mark_stack_empty() || has_aborted(); | |
3539 } | |
3540 | |
3541 void CMTask::reached_limit() { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3542 assert(_words_scanned >= _words_scanned_limit || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3543 _refs_reached >= _refs_reached_limit , |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3544 "shouldn't have been called otherwise"); |
342 | 3545 regular_clock_call(); |
3546 } | |
3547 | |
3548 void CMTask::regular_clock_call() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3549 if (has_aborted()) return; |
342 | 3550 |
3551 // First, we need to recalculate the words scanned and refs reached | |
3552 // limits for the next clock call. | |
3553 recalculate_limits(); | |
3554 | |
3555 // During the regular clock call we do the following | |
3556 | |
3557 // (1) If an overflow has been flagged, then we abort. | |
3558 if (_cm->has_overflown()) { | |
3559 set_has_aborted(); | |
3560 return; | |
3561 } | |
3562 | |
3563 // If we are not concurrent (i.e. we're doing remark) we don't need | |
3564 // to check anything else. The other steps are only needed during | |
3565 // the concurrent marking phase. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3566 if (!concurrent()) return; |
342 | 3567 |
3568 // (2) If marking has been aborted for Full GC, then we also abort. | |
3569 if (_cm->has_aborted()) { | |
3570 set_has_aborted(); | |
3571 statsOnly( ++_aborted_cm_aborted ); | |
3572 return; | |
3573 } | |
3574 | |
3575 double curr_time_ms = os::elapsedVTime() * 1000.0; | |
3576 | |
3577 // (3) If marking stats are enabled, then we update the step history. | |
3578 #if _MARKING_STATS_ | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3579 if (_words_scanned >= _words_scanned_limit) { |
342 | 3580 ++_clock_due_to_scanning; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3581 } |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3582 if (_refs_reached >= _refs_reached_limit) { |
342 | 3583 ++_clock_due_to_marking; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3584 } |
342 | 3585 |
3586 double last_interval_ms = curr_time_ms - _interval_start_time_ms; | |
3587 _interval_start_time_ms = curr_time_ms; | |
3588 _all_clock_intervals_ms.add(last_interval_ms); | |
3589 | |
3590 if (_cm->verbose_medium()) { | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3591 gclog_or_tty->print_cr("[%u] regular clock, interval = %1.2lfms, " |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3592 "scanned = %d%s, refs reached = %d%s", |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3593 _worker_id, last_interval_ms, |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3594 _words_scanned, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3595 (_words_scanned >= _words_scanned_limit) ? " (*)" : "", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3596 _refs_reached, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3597 (_refs_reached >= _refs_reached_limit) ? " (*)" : ""); |
342 | 3598 } |
3599 #endif // _MARKING_STATS_ | |
3600 | |
3601 // (4) We check whether we should yield. If we have to, then we abort. | |
3602 if (_cm->should_yield()) { | |
3603 // We should yield. To do this we abort the task. The caller is | |
3604 // responsible for yielding. | |
3605 set_has_aborted(); | |
3606 statsOnly( ++_aborted_yield ); | |
3607 return; | |
3608 } | |
3609 | |
3610 // (5) We check whether we've reached our time quota. If we have, | |
3611 // then we abort. | |
3612 double elapsed_time_ms = curr_time_ms - _start_time_ms; | |
3613 if (elapsed_time_ms > _time_target_ms) { | |
3614 set_has_aborted(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3615 _has_timed_out = true; |
342 | 3616 statsOnly( ++_aborted_timed_out ); |
3617 return; | |
3618 } | |
3619 | |
3620 // (6) Finally, we check whether there are enough completed STAB | |
3621 // buffers available for processing. If there are, we abort. | |
3622 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3623 if (!_draining_satb_buffers && satb_mq_set.process_completed_buffers()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3624 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3625 gclog_or_tty->print_cr("[%u] aborting to deal with pending SATB buffers", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3626 _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3627 } |
342 | 3628 // we do need to process SATB buffers, we'll abort and restart |
3629 // the marking task to do so | |
3630 set_has_aborted(); | |
3631 statsOnly( ++_aborted_satb ); | |
3632 return; | |
3633 } | |
3634 } | |
3635 | |
3636 void CMTask::recalculate_limits() { | |
3637 _real_words_scanned_limit = _words_scanned + words_scanned_period; | |
3638 _words_scanned_limit = _real_words_scanned_limit; | |
3639 | |
3640 _real_refs_reached_limit = _refs_reached + refs_reached_period; | |
3641 _refs_reached_limit = _real_refs_reached_limit; | |
3642 } | |
3643 | |
3644 void CMTask::decrease_limits() { | |
3645 // This is called when we believe that we're going to do an infrequent | |
3646 // operation which will increase the per byte scanned cost (i.e. move | |
3647 // entries to/from the global stack). It basically tries to decrease the | |
3648 // scanning limit so that the clock is called earlier. | |
3649 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3650 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3651 gclog_or_tty->print_cr("[%u] decreasing limits", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3652 } |
342 | 3653 |
3654 _words_scanned_limit = _real_words_scanned_limit - | |
3655 3 * words_scanned_period / 4; | |
3656 _refs_reached_limit = _real_refs_reached_limit - | |
3657 3 * refs_reached_period / 4; | |
3658 } | |
3659 | |
3660 void CMTask::move_entries_to_global_stack() { | |
3661 // local array where we'll store the entries that will be popped | |
3662 // from the local queue | |
3663 oop buffer[global_stack_transfer_size]; | |
3664 | |
3665 int n = 0; | |
3666 oop obj; | |
3667 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) { | |
3668 buffer[n] = obj; | |
3669 ++n; | |
3670 } | |
3671 | |
3672 if (n > 0) { | |
3673 // we popped at least one entry from the local queue | |
3674 | |
3675 statsOnly( ++_global_transfers_to; _local_pops += n ); | |
3676 | |
3677 if (!_cm->mark_stack_push(buffer, n)) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3678 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3679 gclog_or_tty->print_cr("[%u] aborting due to global stack overflow", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3680 _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3681 } |
342 | 3682 set_has_aborted(); |
3683 } else { | |
3684 // the transfer was successful | |
3685 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3686 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3687 gclog_or_tty->print_cr("[%u] pushed %d entries to the global stack", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3688 _worker_id, n); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3689 } |
342 | 3690 statsOnly( int tmp_size = _cm->mark_stack_size(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3691 if (tmp_size > _global_max_size) { |
342 | 3692 _global_max_size = tmp_size; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3693 } |
342 | 3694 _global_pushes += n ); |
3695 } | |
3696 } | |
3697 | |
3698 // this operation was quite expensive, so decrease the limits | |
3699 decrease_limits(); | |
3700 } | |
3701 | |
3702 void CMTask::get_entries_from_global_stack() { | |
3703 // local array where we'll store the entries that will be popped | |
3704 // from the global stack. | |
3705 oop buffer[global_stack_transfer_size]; | |
3706 int n; | |
3707 _cm->mark_stack_pop(buffer, global_stack_transfer_size, &n); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3708 assert(n <= global_stack_transfer_size, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3709 "we should not pop more than the given limit"); |
342 | 3710 if (n > 0) { |
3711 // yes, we did actually pop at least one entry | |
3712 | |
3713 statsOnly( ++_global_transfers_from; _global_pops += n ); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3714 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3715 gclog_or_tty->print_cr("[%u] popped %d entries from the global stack", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3716 _worker_id, n); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3717 } |
342 | 3718 for (int i = 0; i < n; ++i) { |
3719 bool success = _task_queue->push(buffer[i]); | |
3720 // We only call this when the local queue is empty or under a | |
3721 // given target limit. So, we do not expect this push to fail. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3722 assert(success, "invariant"); |
342 | 3723 } |
3724 | |
3725 statsOnly( int tmp_size = _task_queue->size(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3726 if (tmp_size > _local_max_size) { |
342 | 3727 _local_max_size = tmp_size; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3728 } |
342 | 3729 _local_pushes += n ); |
3730 } | |
3731 | |
3732 // this operation was quite expensive, so decrease the limits | |
3733 decrease_limits(); | |
3734 } | |
3735 | |
3736 void CMTask::drain_local_queue(bool partially) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3737 if (has_aborted()) return; |
342 | 3738 |
3739 // Decide what the target size is, depending whether we're going to | |
3740 // drain it partially (so that other tasks can steal if they run out | |
3741 // of things to do) or totally (at the very end). | |
3742 size_t target_size; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3743 if (partially) { |
342 | 3744 target_size = MIN2((size_t)_task_queue->max_elems()/3, GCDrainStackTargetSize); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3745 } else { |
342 | 3746 target_size = 0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3747 } |
342 | 3748 |
3749 if (_task_queue->size() > target_size) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3750 if (_cm->verbose_high()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3751 gclog_or_tty->print_cr("[%u] draining local queue, target size = %d", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3752 _worker_id, target_size); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3753 } |
342 | 3754 |
3755 oop obj; | |
3756 bool ret = _task_queue->pop_local(obj); | |
3757 while (ret) { | |
3758 statsOnly( ++_local_pops ); | |
3759 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3760 if (_cm->verbose_high()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3761 gclog_or_tty->print_cr("[%u] popped "PTR_FORMAT, _worker_id, |
342 | 3762 (void*) obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3763 } |
342 | 3764 |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3765 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" ); |
2361 | 3766 assert(!_g1h->is_on_master_free_list( |
2152 | 3767 _g1h->heap_region_containing((HeapWord*) obj)), "invariant"); |
342 | 3768 |
3769 scan_object(obj); | |
3770 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3771 if (_task_queue->size() <= target_size || has_aborted()) { |
342 | 3772 ret = false; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3773 } else { |
342 | 3774 ret = _task_queue->pop_local(obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3775 } |
342 | 3776 } |
3777 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3778 if (_cm->verbose_high()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3779 gclog_or_tty->print_cr("[%u] drained local queue, size = %d", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3780 _worker_id, _task_queue->size()); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3781 } |
342 | 3782 } |
3783 } | |
3784 | |
3785 void CMTask::drain_global_stack(bool partially) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3786 if (has_aborted()) return; |
342 | 3787 |
3788 // We have a policy to drain the local queue before we attempt to | |
3789 // drain the global stack. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3790 assert(partially || _task_queue->size() == 0, "invariant"); |
342 | 3791 |
3792 // Decide what the target size is, depending whether we're going to | |
3793 // drain it partially (so that other tasks can steal if they run out | |
3794 // of things to do) or totally (at the very end). Notice that, | |
3795 // because we move entries from the global stack in chunks or | |
3796 // because another task might be doing the same, we might in fact | |
3797 // drop below the target. But, this is not a problem. | |
3798 size_t target_size; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3799 if (partially) { |
342 | 3800 target_size = _cm->partial_mark_stack_size_target(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3801 } else { |
342 | 3802 target_size = 0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3803 } |
342 | 3804 |
3805 if (_cm->mark_stack_size() > target_size) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3806 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3807 gclog_or_tty->print_cr("[%u] draining global_stack, target size %d", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3808 _worker_id, target_size); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3809 } |
342 | 3810 |
3811 while (!has_aborted() && _cm->mark_stack_size() > target_size) { | |
3812 get_entries_from_global_stack(); | |
3813 drain_local_queue(partially); | |
3814 } | |
3815 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3816 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3817 gclog_or_tty->print_cr("[%u] drained global stack, size = %d", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3818 _worker_id, _cm->mark_stack_size()); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3819 } |
342 | 3820 } |
3821 } | |
3822 | |
3823 // SATB Queue has several assumptions on whether to call the par or | |
3824 // non-par versions of the methods. this is why some of the code is | |
3825 // replicated. We should really get rid of the single-threaded version | |
3826 // of the code to simplify things. | |
3827 void CMTask::drain_satb_buffers() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3828 if (has_aborted()) return; |
342 | 3829 |
3830 // We set this so that the regular clock knows that we're in the | |
3831 // middle of draining buffers and doesn't set the abort flag when it | |
3832 // notices that SATB buffers are available for draining. It'd be | |
3833 // very counter productive if it did that. :-) | |
3834 _draining_satb_buffers = true; | |
3835 | |
3836 CMObjectClosure oc(this); | |
3837 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3838 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3839 satb_mq_set.set_par_closure(_worker_id, &oc); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3840 } else { |
342 | 3841 satb_mq_set.set_closure(&oc); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3842 } |
342 | 3843 |
3844 // This keeps claiming and applying the closure to completed buffers | |
3845 // until we run out of buffers or we need to abort. | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
3846 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3847 while (!has_aborted() && |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3848 satb_mq_set.par_apply_closure_to_completed_buffer(_worker_id)) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3849 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3850 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3851 } |
342 | 3852 statsOnly( ++_satb_buffers_processed ); |
3853 regular_clock_call(); | |
3854 } | |
3855 } else { | |
3856 while (!has_aborted() && | |
3857 satb_mq_set.apply_closure_to_completed_buffer()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3858 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3859 gclog_or_tty->print_cr("[%u] processed an SATB buffer", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3860 } |
342 | 3861 statsOnly( ++_satb_buffers_processed ); |
3862 regular_clock_call(); | |
3863 } | |
3864 } | |
3865 | |
3866 if (!concurrent() && !has_aborted()) { | |
3867 // We should only do this during remark. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3868 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3869 satb_mq_set.par_iterate_closure_all_threads(_worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3870 } else { |
342 | 3871 satb_mq_set.iterate_closure_all_threads(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3872 } |
342 | 3873 } |
3874 | |
3875 _draining_satb_buffers = false; | |
3876 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3877 assert(has_aborted() || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3878 concurrent() || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3879 satb_mq_set.completed_buffers_num() == 0, "invariant"); |
342 | 3880 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3881 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3882 satb_mq_set.set_par_closure(_worker_id, NULL); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3883 } else { |
342 | 3884 satb_mq_set.set_closure(NULL); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3885 } |
342 | 3886 |
3887 // again, this was a potentially expensive operation, decrease the | |
3888 // limits to get the regular clock call early | |
3889 decrease_limits(); | |
3890 } | |
3891 | |
3892 void CMTask::print_stats() { | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3893 gclog_or_tty->print_cr("Marking Stats, task = %u, calls = %d", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
3894 _worker_id, _calls); |
342 | 3895 gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms", |
3896 _elapsed_time_ms, _termination_time_ms); | |
3897 gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
3898 _step_times_ms.num(), _step_times_ms.avg(), | |
3899 _step_times_ms.sd()); | |
3900 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
3901 _step_times_ms.maximum(), _step_times_ms.sum()); | |
3902 | |
3903 #if _MARKING_STATS_ | |
3904 gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
3905 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(), | |
3906 _all_clock_intervals_ms.sd()); | |
3907 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
3908 _all_clock_intervals_ms.maximum(), | |
3909 _all_clock_intervals_ms.sum()); | |
3910 gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d", | |
3911 _clock_due_to_scanning, _clock_due_to_marking); | |
3912 gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d", | |
3913 _objs_scanned, _objs_found_on_bitmap); | |
3914 gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d", | |
3915 _local_pushes, _local_pops, _local_max_size); | |
3916 gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d", | |
3917 _global_pushes, _global_pops, _global_max_size); | |
3918 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d", | |
3919 _global_transfers_to,_global_transfers_from); | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3920 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed); |
342 | 3921 gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed); |
3922 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d", | |
3923 _steal_attempts, _steals); | |
3924 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted); | |
3925 gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d", | |
3926 _aborted_overflow, _aborted_cm_aborted, _aborted_yield); | |
3927 gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d", | |
3928 _aborted_timed_out, _aborted_satb, _aborted_termination); | |
3929 #endif // _MARKING_STATS_ | |
3930 } | |
3931 | |
3932 /***************************************************************************** | |
3933 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
3934 The do_marking_step(time_target_ms, ...) method is the building |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
3935 block of the parallel marking framework. It can be called in parallel |
342 | 3936 with other invocations of do_marking_step() on different tasks |
3937 (but only one per task, obviously) and concurrently with the | |
3938 mutator threads, or during remark, hence it eliminates the need | |
3939 for two versions of the code. When called during remark, it will | |
3940 pick up from where the task left off during the concurrent marking | |
3941 phase. Interestingly, tasks are also claimable during evacuation | |
3942 pauses too, since do_marking_step() ensures that it aborts before | |
3943 it needs to yield. | |
3944 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
3945 The data structures that it uses to do marking work are the |
342 | 3946 following: |
3947 | |
3948 (1) Marking Bitmap. If there are gray objects that appear only | |
3949 on the bitmap (this happens either when dealing with an overflow | |
3950 or when the initial marking phase has simply marked the roots | |
3951 and didn't push them on the stack), then tasks claim heap | |
3952 regions whose bitmap they then scan to find gray objects. A | |
3953 global finger indicates where the end of the last claimed region | |
3954 is. A local finger indicates how far into the region a task has | |
3955 scanned. The two fingers are used to determine how to gray an | |
3956 object (i.e. whether simply marking it is OK, as it will be | |
3957 visited by a task in the future, or whether it needs to be also | |
3958 pushed on a stack). | |
3959 | |
3960 (2) Local Queue. The local queue of the task which is accessed | |
3961 reasonably efficiently by the task. Other tasks can steal from | |
3962 it when they run out of work. Throughout the marking phase, a | |
3963 task attempts to keep its local queue short but not totally | |
3964 empty, so that entries are available for stealing by other | |
3965 tasks. Only when there is no more work, a task will totally | |
3966 drain its local queue. | |
3967 | |
3968 (3) Global Mark Stack. This handles local queue overflow. During | |
3969 marking only sets of entries are moved between it and the local | |
3970 queues, as access to it requires a mutex and more fine-grain | |
3971 interaction with it which might cause contention. If it | |
3972 overflows, then the marking phase should restart and iterate | |
3973 over the bitmap to identify gray objects. Throughout the marking | |
3974 phase, tasks attempt to keep the global mark stack at a small | |
3975 length but not totally empty, so that entries are available for | |
3976 popping by other tasks. Only when there is no more work, tasks | |
3977 will totally drain the global mark stack. | |
3978 | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3979 (4) SATB Buffer Queue. This is where completed SATB buffers are |
342 | 3980 made available. Buffers are regularly removed from this queue |
3981 and scanned for roots, so that the queue doesn't get too | |
3982 long. During remark, all completed buffers are processed, as | |
3983 well as the filled in parts of any uncompleted buffers. | |
3984 | |
3985 The do_marking_step() method tries to abort when the time target | |
3986 has been reached. There are a few other cases when the | |
3987 do_marking_step() method also aborts: | |
3988 | |
3989 (1) When the marking phase has been aborted (after a Full GC). | |
3990 | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3991 (2) When a global overflow (on the global stack) has been |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3992 triggered. Before the task aborts, it will actually sync up with |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3993 the other tasks to ensure that all the marking data structures |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
3994 (local queues, stacks, fingers etc.) are re-initialized so that |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3995 when do_marking_step() completes, the marking phase can |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3996 immediately restart. |
342 | 3997 |
3998 (3) When enough completed SATB buffers are available. The | |
3999 do_marking_step() method only tries to drain SATB buffers right | |
4000 at the beginning. So, if enough buffers are available, the | |
4001 marking step aborts and the SATB buffers are processed at | |
4002 the beginning of the next invocation. | |
4003 | |
4004 (4) To yield. when we have to yield then we abort and yield | |
4005 right at the end of do_marking_step(). This saves us from a lot | |
4006 of hassle as, by yielding we might allow a Full GC. If this | |
4007 happens then objects will be compacted underneath our feet, the | |
4008 heap might shrink, etc. We save checking for this by just | |
4009 aborting and doing the yield right at the end. | |
4010 | |
4011 From the above it follows that the do_marking_step() method should | |
4012 be called in a loop (or, otherwise, regularly) until it completes. | |
4013 | |
4014 If a marking step completes without its has_aborted() flag being | |
4015 true, it means it has completed the current marking phase (and | |
4016 also all other marking tasks have done so and have all synced up). | |
4017 | |
4018 A method called regular_clock_call() is invoked "regularly" (in | |
4019 sub ms intervals) throughout marking. It is this clock method that | |
4020 checks all the abort conditions which were mentioned above and | |
4021 decides when the task should abort. A work-based scheme is used to | |
4022 trigger this clock method: when the number of object words the | |
4023 marking phase has scanned or the number of references the marking | |
4024 phase has visited reach a given limit. Additional invocations to | |
4025 the method clock have been planted in a few other strategic places | |
4026 too. The initial reason for the clock method was to avoid calling | |
4027 vtime too regularly, as it is quite expensive. So, once it was in | |
4028 place, it was natural to piggy-back all the other conditions on it | |
4029 too and not constantly check them throughout the code. | |
4030 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4031 If do_termination is true then do_marking_step will enter its |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4032 termination protocol. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4033 |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4034 The value of is_serial must be true when do_marking_step is being |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4035 called serially (i.e. by the VMThread) and do_marking_step should |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4036 skip any synchronization in the termination and overflow code. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4037 Examples include the serial remark code and the serial reference |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4038 processing closures. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4039 |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4040 The value of is_serial must be false when do_marking_step is |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4041 being called by any of the worker threads in a work gang. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4042 Examples include the concurrent marking code (CMMarkingTask), |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4043 the MT remark code, and the MT reference processing closures. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4044 |
342 | 4045 *****************************************************************************/ |
4046 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4047 void CMTask::do_marking_step(double time_target_ms, |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4048 bool do_termination, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4049 bool is_serial) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4050 assert(time_target_ms >= 1.0, "minimum granularity is 1ms"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4051 assert(concurrent() == _cm->concurrent(), "they should be the same"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4052 |
342 | 4053 G1CollectorPolicy* g1_policy = _g1h->g1_policy(); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4054 assert(_task_queues != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4055 assert(_task_queue != NULL, "invariant"); |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4056 assert(_task_queues->queue(_worker_id) == _task_queue, "invariant"); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4057 |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4058 assert(!_claimed, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4059 "only one thread should claim this task at any one time"); |
342 | 4060 |
4061 // OK, this doesn't safeguard again all possible scenarios, as it is | |
4062 // possible for two threads to set the _claimed flag at the same | |
4063 // time. But it is only for debugging purposes anyway and it will | |
4064 // catch most problems. | |
4065 _claimed = true; | |
4066 | |
4067 _start_time_ms = os::elapsedVTime() * 1000.0; | |
4068 statsOnly( _interval_start_time_ms = _start_time_ms ); | |
4069 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4070 // If do_stealing is true then do_marking_step will attempt to |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4071 // steal work from the other CMTasks. It only makes sense to |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4072 // enable stealing when the termination protocol is enabled |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4073 // and do_marking_step() is not being called serially. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4074 bool do_stealing = do_termination && !is_serial; |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4075 |
342 | 4076 double diff_prediction_ms = |
4077 g1_policy->get_new_prediction(&_marking_step_diffs_ms); | |
4078 _time_target_ms = time_target_ms - diff_prediction_ms; | |
4079 | |
4080 // set up the variables that are used in the work-based scheme to | |
4081 // call the regular clock method | |
4082 _words_scanned = 0; | |
4083 _refs_reached = 0; | |
4084 recalculate_limits(); | |
4085 | |
4086 // clear all flags | |
4087 clear_has_aborted(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4088 _has_timed_out = false; |
342 | 4089 _draining_satb_buffers = false; |
4090 | |
4091 ++_calls; | |
4092 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4093 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4094 gclog_or_tty->print_cr("[%u] >>>>>>>>>> START, call = %d, " |
342 | 4095 "target = %1.2lfms >>>>>>>>>>", |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4096 _worker_id, _calls, _time_target_ms); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4097 } |
342 | 4098 |
4099 // Set up the bitmap and oop closures. Anything that uses them is | |
4100 // eventually called from this method, so it is OK to allocate these | |
4101 // statically. | |
4102 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap); | |
3771 | 4103 G1CMOopClosure cm_oop_closure(_g1h, _cm, this); |
4104 set_cm_oop_closure(&cm_oop_closure); | |
342 | 4105 |
4106 if (_cm->has_overflown()) { | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4107 // This can happen if the mark stack overflows during a GC pause |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4108 // and this task, after a yield point, restarts. We have to abort |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4109 // as we need to get into the overflow protocol which happens |
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4110 // right at the end of this task. |
342 | 4111 set_has_aborted(); |
4112 } | |
4113 | |
4114 // First drain any available SATB buffers. After this, we will not | |
4115 // look at SATB buffers before the next invocation of this method. | |
4116 // If enough completed SATB buffers are queued up, the regular clock | |
4117 // will abort this task so that it restarts. | |
4118 drain_satb_buffers(); | |
4119 // ...then partially drain the local queue and the global stack | |
4120 drain_local_queue(true); | |
4121 drain_global_stack(true); | |
4122 | |
4123 do { | |
4124 if (!has_aborted() && _curr_region != NULL) { | |
4125 // This means that we're already holding on to a region. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4126 assert(_finger != NULL, "if region is not NULL, then the finger " |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4127 "should not be NULL either"); |
342 | 4128 |
4129 // We might have restarted this task after an evacuation pause | |
4130 // which might have evacuated the region we're holding on to | |
4131 // underneath our feet. Let's read its limit again to make sure | |
4132 // that we do not iterate over a region of the heap that | |
4133 // contains garbage (update_region_limit() will also move | |
4134 // _finger to the start of the region if it is found empty). | |
4135 update_region_limit(); | |
4136 // We will start from _finger not from the start of the region, | |
4137 // as we might be restarting this task after aborting half-way | |
4138 // through scanning this region. In this case, _finger points to | |
4139 // the address where we last found a marked object. If this is a | |
4140 // fresh region, _finger points to start(). | |
4141 MemRegion mr = MemRegion(_finger, _region_limit); | |
4142 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4143 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4144 gclog_or_tty->print_cr("[%u] we're scanning part " |
342 | 4145 "["PTR_FORMAT", "PTR_FORMAT") " |
8039
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4146 "of region "HR_FORMAT, |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4147 _worker_id, _finger, _region_limit, |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4148 HR_FORMAT_PARAMS(_curr_region)); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4149 } |
342 | 4150 |
8039
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4151 assert(!_curr_region->isHumongous() || mr.start() == _curr_region->bottom(), |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4152 "humongous regions should go around loop once only"); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4153 |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4154 // Some special cases: |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4155 // If the memory region is empty, we can just give up the region. |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4156 // If the current region is humongous then we only need to check |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4157 // the bitmap for the bit associated with the start of the object, |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4158 // scan the object if it's live, and give up the region. |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4159 // Otherwise, let's iterate over the bitmap of the part of the region |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4160 // that is left. |
8034
bce1ac447f6b
7052429: G1: Avoid unnecessary scanning of humongous regions during concurrent marking
johnc
parents:
8014
diff
changeset
|
4161 // If the iteration is successful, give up the region. |
8039
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4162 if (mr.is_empty()) { |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4163 giveup_current_region(); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4164 regular_clock_call(); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4165 } else if (_curr_region->isHumongous() && mr.start() == _curr_region->bottom()) { |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4166 if (_nextMarkBitMap->isMarked(mr.start())) { |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4167 // The object is marked - apply the closure |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4168 BitMap::idx_t offset = _nextMarkBitMap->heapWordToOffset(mr.start()); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4169 bitmap_closure.do_bit(offset); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4170 } |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4171 // Even if this task aborted while scanning the humongous object |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4172 // we can (and should) give up the current region. |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4173 giveup_current_region(); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4174 regular_clock_call(); |
5e401ef52ec0
8007772: G1: assert(!hr->isHumongous() || mr.start() == hr->bottom()) failed: the start of HeapRegion and MemRegion should be consistent for humongous regions
johnc
parents:
8034
diff
changeset
|
4175 } else if (_nextMarkBitMap->iterate(&bitmap_closure, mr)) { |
342 | 4176 giveup_current_region(); |
4177 regular_clock_call(); | |
4178 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4179 assert(has_aborted(), "currently the only way to do so"); |
342 | 4180 // The only way to abort the bitmap iteration is to return |
4181 // false from the do_bit() method. However, inside the | |
4182 // do_bit() method we move the _finger to point to the | |
4183 // object currently being looked at. So, if we bail out, we | |
4184 // have definitely set _finger to something non-null. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4185 assert(_finger != NULL, "invariant"); |
342 | 4186 |
4187 // Region iteration was actually aborted. So now _finger | |
4188 // points to the address of the object we last scanned. If we | |
4189 // leave it there, when we restart this task, we will rescan | |
4190 // the object. It is easy to avoid this. We move the finger by | |
4191 // enough to point to the next possible object header (the | |
4192 // bitmap knows by how much we need to move it as it knows its | |
4193 // granularity). | |
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4194 assert(_finger < _region_limit, "invariant"); |
8733
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8039
diff
changeset
|
4195 HeapWord* new_finger = _nextMarkBitMap->nextObject(_finger); |
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4196 // Check if bitmap iteration was aborted while scanning the last object |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4197 if (new_finger >= _region_limit) { |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4198 giveup_current_region(); |
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4199 } else { |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4200 move_finger_to(new_finger); |
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4201 } |
342 | 4202 } |
4203 } | |
4204 // At this point we have either completed iterating over the | |
4205 // region we were holding on to, or we have aborted. | |
4206 | |
4207 // We then partially drain the local queue and the global stack. | |
4208 // (Do we really need this?) | |
4209 drain_local_queue(true); | |
4210 drain_global_stack(true); | |
4211 | |
4212 // Read the note on the claim_region() method on why it might | |
4213 // return NULL with potentially more regions available for | |
4214 // claiming and why we have to check out_of_regions() to determine | |
4215 // whether we're done or not. | |
4216 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) { | |
4217 // We are going to try to claim a new region. We should have | |
4218 // given up on the previous one. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4219 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4220 assert(_curr_region == NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4221 assert(_finger == NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4222 assert(_region_limit == NULL, "invariant"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4223 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4224 gclog_or_tty->print_cr("[%u] trying to claim a new region", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4225 } |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4226 HeapRegion* claimed_region = _cm->claim_region(_worker_id); |
342 | 4227 if (claimed_region != NULL) { |
4228 // Yes, we managed to claim one | |
4229 statsOnly( ++_regions_claimed ); | |
4230 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4231 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4232 gclog_or_tty->print_cr("[%u] we successfully claimed " |
342 | 4233 "region "PTR_FORMAT, |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4234 _worker_id, claimed_region); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4235 } |
342 | 4236 |
4237 setup_for_region(claimed_region); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4238 assert(_curr_region == claimed_region, "invariant"); |
342 | 4239 } |
4240 // It is important to call the regular clock here. It might take | |
4241 // a while to claim a region if, for example, we hit a large | |
4242 // block of empty regions. So we need to call the regular clock | |
4243 // method once round the loop to make sure it's called | |
4244 // frequently enough. | |
4245 regular_clock_call(); | |
4246 } | |
4247 | |
4248 if (!has_aborted() && _curr_region == NULL) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4249 assert(_cm->out_of_regions(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4250 "at this point we should be out of regions"); |
342 | 4251 } |
4252 } while ( _curr_region != NULL && !has_aborted()); | |
4253 | |
4254 if (!has_aborted()) { | |
4255 // We cannot check whether the global stack is empty, since other | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4256 // tasks might be pushing objects to it concurrently. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4257 assert(_cm->out_of_regions(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4258 "at this point we should be out of regions"); |
342 | 4259 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4260 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4261 gclog_or_tty->print_cr("[%u] all regions claimed", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4262 } |
342 | 4263 |
4264 // Try to reduce the number of available SATB buffers so that | |
4265 // remark has less work to do. | |
4266 drain_satb_buffers(); | |
4267 } | |
4268 | |
4269 // Since we've done everything else, we can now totally drain the | |
4270 // local queue and global stack. | |
4271 drain_local_queue(false); | |
4272 drain_global_stack(false); | |
4273 | |
4274 // Attempt at work stealing from other task's queues. | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4275 if (do_stealing && !has_aborted()) { |
342 | 4276 // We have not aborted. This means that we have finished all that |
4277 // we could. Let's try to do some stealing... | |
4278 | |
4279 // We cannot check whether the global stack is empty, since other | |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4280 // tasks might be pushing objects to it concurrently. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4281 assert(_cm->out_of_regions() && _task_queue->size() == 0, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4282 "only way to reach here"); |
342 | 4283 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4284 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4285 gclog_or_tty->print_cr("[%u] starting to steal", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4286 } |
342 | 4287 |
4288 while (!has_aborted()) { | |
4289 oop obj; | |
4290 statsOnly( ++_steal_attempts ); | |
4291 | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4292 if (_cm->try_stealing(_worker_id, &_hash_seed, obj)) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4293 if (_cm->verbose_medium()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4294 gclog_or_tty->print_cr("[%u] stolen "PTR_FORMAT" successfully", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4295 _worker_id, (void*) obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4296 } |
342 | 4297 |
4298 statsOnly( ++_steals ); | |
4299 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4300 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4301 "any stolen object should be marked"); |
342 | 4302 scan_object(obj); |
4303 | |
4304 // And since we're towards the end, let's totally drain the | |
4305 // local queue and global stack. | |
4306 drain_local_queue(false); | |
4307 drain_global_stack(false); | |
4308 } else { | |
4309 break; | |
4310 } | |
4311 } | |
4312 } | |
4313 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4314 // If we are about to wrap up and go into termination, check if we |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4315 // should raise the overflow flag. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4316 if (do_termination && !has_aborted()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4317 if (_cm->force_overflow()->should_force()) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4318 _cm->set_has_overflown(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4319 regular_clock_call(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4320 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4321 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4322 |
342 | 4323 // We still haven't aborted. Now, let's try to get into the |
4324 // termination protocol. | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4325 if (do_termination && !has_aborted()) { |
342 | 4326 // We cannot check whether the global stack is empty, since other |
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4327 // tasks might be concurrently pushing objects on it. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4328 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4329 assert(_cm->out_of_regions(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4330 assert(_task_queue->size() == 0, "only way to reach here"); |
342 | 4331 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4332 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4333 gclog_or_tty->print_cr("[%u] starting termination protocol", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4334 } |
342 | 4335 |
4336 _termination_start_time_ms = os::elapsedVTime() * 1000.0; | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4337 |
342 | 4338 // The CMTask class also extends the TerminatorTerminator class, |
4339 // hence its should_exit_termination() method will also decide | |
4340 // whether to exit the termination protocol or not. | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4341 bool finished = (is_serial || |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4342 _cm->terminator()->offer_termination(this)); |
342 | 4343 double termination_end_time_ms = os::elapsedVTime() * 1000.0; |
4344 _termination_time_ms += | |
4345 termination_end_time_ms - _termination_start_time_ms; | |
4346 | |
4347 if (finished) { | |
4348 // We're all done. | |
4349 | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4350 if (_worker_id == 0) { |
342 | 4351 // let's allow task 0 to do this |
4352 if (concurrent()) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4353 assert(_cm->concurrent_marking_in_progress(), "invariant"); |
342 | 4354 // we need to set this to false before the next |
4355 // safepoint. This way we ensure that the marking phase | |
4356 // doesn't observe any more heap expansions. | |
4357 _cm->clear_concurrent_marking_in_progress(); | |
4358 } | |
4359 } | |
4360 | |
4361 // We can now guarantee that the global stack is empty, since | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4362 // all other tasks have finished. We separated the guarantees so |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4363 // that, if a condition is false, we can immediately find out |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4364 // which one. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4365 guarantee(_cm->out_of_regions(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4366 guarantee(_cm->mark_stack_empty(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4367 guarantee(_task_queue->size() == 0, "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4368 guarantee(!_cm->has_overflown(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4369 guarantee(!_cm->mark_stack_overflow(), "only way to reach here"); |
342 | 4370 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4371 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4372 gclog_or_tty->print_cr("[%u] all tasks terminated", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4373 } |
342 | 4374 } else { |
4375 // Apparently there's more work to do. Let's abort this task. It | |
4376 // will restart it and we can hopefully find more things to do. | |
4377 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4378 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4379 gclog_or_tty->print_cr("[%u] apparently there is more work to do", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4380 _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4381 } |
342 | 4382 |
4383 set_has_aborted(); | |
4384 statsOnly( ++_aborted_termination ); | |
4385 } | |
4386 } | |
4387 | |
4388 // Mainly for debugging purposes to make sure that a pointer to the | |
4389 // closure which was statically allocated in this frame doesn't | |
4390 // escape it by accident. | |
3771 | 4391 set_cm_oop_closure(NULL); |
342 | 4392 double end_time_ms = os::elapsedVTime() * 1000.0; |
4393 double elapsed_time_ms = end_time_ms - _start_time_ms; | |
4394 // Update the step history. | |
4395 _step_times_ms.add(elapsed_time_ms); | |
4396 | |
4397 if (has_aborted()) { | |
4398 // The task was aborted for some reason. | |
4399 | |
4400 statsOnly( ++_aborted ); | |
4401 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4402 if (_has_timed_out) { |
342 | 4403 double diff_ms = elapsed_time_ms - _time_target_ms; |
4404 // Keep statistics of how well we did with respect to hitting | |
4405 // our target only if we actually timed out (if we aborted for | |
4406 // other reasons, then the results might get skewed). | |
4407 _marking_step_diffs_ms.add(diff_ms); | |
4408 } | |
4409 | |
4410 if (_cm->has_overflown()) { | |
4411 // This is the interesting one. We aborted because a global | |
4412 // overflow was raised. This means we have to restart the | |
4413 // marking phase and start iterating over regions. However, in | |
4414 // order to do this we have to make sure that all tasks stop | |
4415 // what they are doing and re-initialise in a safe manner. We | |
4416 // will achieve this with the use of two barrier sync points. | |
4417 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4418 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4419 gclog_or_tty->print_cr("[%u] detected overflow", _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4420 } |
342 | 4421 |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4422 if (!is_serial) { |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4423 // We only need to enter the sync barrier if being called |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4424 // from a parallel context |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4425 _cm->enter_first_sync_barrier(_worker_id); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4426 |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4427 // When we exit this sync barrier we know that all tasks have |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4428 // stopped doing marking work. So, it's now safe to |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4429 // re-initialise our data structures. At the end of this method, |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4430 // task 0 will clear the global data structures. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4431 } |
342 | 4432 |
4433 statsOnly( ++_aborted_overflow ); | |
4434 | |
4435 // We clear the local state of this task... | |
4436 clear_region_fields(); | |
4437 | |
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4438 if (!is_serial) { |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4439 // ...and enter the second barrier. |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4440 _cm->enter_second_sync_barrier(_worker_id); |
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8744
diff
changeset
|
4441 } |
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
4442 // At this point, if we're during the concurrent phase of |
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
4443 // marking, everything has been re-initialized and we're |
342 | 4444 // ready to restart. |
4445 } | |
4446 | |
4447 if (_cm->verbose_low()) { | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4448 gclog_or_tty->print_cr("[%u] <<<<<<<<<< ABORTING, target = %1.2lfms, " |
342 | 4449 "elapsed = %1.2lfms <<<<<<<<<<", |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4450 _worker_id, _time_target_ms, elapsed_time_ms); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4451 if (_cm->has_aborted()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4452 gclog_or_tty->print_cr("[%u] ========== MARKING ABORTED ==========", |
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4453 _worker_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4454 } |
342 | 4455 } |
4456 } else { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4457 if (_cm->verbose_low()) { |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4458 gclog_or_tty->print_cr("[%u] <<<<<<<<<< FINISHED, target = %1.2lfms, " |
342 | 4459 "elapsed = %1.2lfms <<<<<<<<<<", |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4460 _worker_id, _time_target_ms, elapsed_time_ms); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4461 } |
342 | 4462 } |
4463 | |
4464 _claimed = false; | |
4465 } | |
4466 | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4467 CMTask::CMTask(uint worker_id, |
342 | 4468 ConcurrentMark* cm, |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4469 size_t* marked_bytes, |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4470 BitMap* card_bm, |
342 | 4471 CMTaskQueue* task_queue, |
4472 CMTaskQueueSet* task_queues) | |
4473 : _g1h(G1CollectedHeap::heap()), | |
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
4474 _worker_id(worker_id), _cm(cm), |
342 | 4475 _claimed(false), |
4476 _nextMarkBitMap(NULL), _hash_seed(17), | |
4477 _task_queue(task_queue), | |
4478 _task_queues(task_queues), | |
3771 | 4479 _cm_oop_closure(NULL), |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4480 _marked_bytes_array(marked_bytes), |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4481 _card_bm(card_bm) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4482 guarantee(task_queue != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4483 guarantee(task_queues != NULL, "invariant"); |
342 | 4484 |
4485 statsOnly( _clock_due_to_scanning = 0; | |
4486 _clock_due_to_marking = 0 ); | |
4487 | |
4488 _marking_step_diffs_ms.add(0.5); | |
4489 } | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4490 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4491 // These are formatting macros that are used below to ensure |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4492 // consistent formatting. The *_H_* versions are used to format the |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4493 // header for a particular value and they should be kept consistent |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4494 // with the corresponding macro. Also note that most of the macros add |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4495 // the necessary white space (as a prefix) which makes them a bit |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4496 // easier to compose. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4497 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4498 // All the output lines are prefixed with this string to be able to |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4499 // identify them easily in a large log file. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4500 #define G1PPRL_LINE_PREFIX "###" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4501 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4502 #define G1PPRL_ADDR_BASE_FORMAT " "PTR_FORMAT"-"PTR_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4503 #ifdef _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4504 #define G1PPRL_ADDR_BASE_H_FORMAT " %37s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4505 #else // _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4506 #define G1PPRL_ADDR_BASE_H_FORMAT " %21s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4507 #endif // _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4508 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4509 // For per-region info |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4510 #define G1PPRL_TYPE_FORMAT " %-4s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4511 #define G1PPRL_TYPE_H_FORMAT " %4s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4512 #define G1PPRL_BYTE_FORMAT " "SIZE_FORMAT_W(9) |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4513 #define G1PPRL_BYTE_H_FORMAT " %9s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4514 #define G1PPRL_DOUBLE_FORMAT " %14.1f" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4515 #define G1PPRL_DOUBLE_H_FORMAT " %14s" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4516 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4517 // For summary info |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4518 #define G1PPRL_SUM_ADDR_FORMAT(tag) " "tag":"G1PPRL_ADDR_BASE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4519 #define G1PPRL_SUM_BYTE_FORMAT(tag) " "tag": "SIZE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4520 #define G1PPRL_SUM_MB_FORMAT(tag) " "tag": %1.2f MB" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4521 #define G1PPRL_SUM_MB_PERC_FORMAT(tag) G1PPRL_SUM_MB_FORMAT(tag)" / %1.2f %%" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4522 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4523 G1PrintRegionLivenessInfoClosure:: |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4524 G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name) |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4525 : _out(out), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4526 _total_used_bytes(0), _total_capacity_bytes(0), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4527 _total_prev_live_bytes(0), _total_next_live_bytes(0), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4528 _hum_used_bytes(0), _hum_capacity_bytes(0), |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4529 _hum_prev_live_bytes(0), _hum_next_live_bytes(0), |
12080 | 4530 _total_remset_bytes(0), _total_strong_code_roots_bytes(0) { |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4531 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4532 MemRegion g1_committed = g1h->g1_committed(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4533 MemRegion g1_reserved = g1h->g1_reserved(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4534 double now = os::elapsedTime(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4535 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4536 // Print the header of the output. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4537 _out->cr(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4538 _out->print_cr(G1PPRL_LINE_PREFIX" PHASE %s @ %1.3f", phase_name, now); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4539 _out->print_cr(G1PPRL_LINE_PREFIX" HEAP" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4540 G1PPRL_SUM_ADDR_FORMAT("committed") |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4541 G1PPRL_SUM_ADDR_FORMAT("reserved") |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4542 G1PPRL_SUM_BYTE_FORMAT("region-size"), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4543 g1_committed.start(), g1_committed.end(), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4544 g1_reserved.start(), g1_reserved.end(), |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3979
diff
changeset
|
4545 HeapRegion::GrainBytes); |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4546 _out->print_cr(G1PPRL_LINE_PREFIX); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4547 _out->print_cr(G1PPRL_LINE_PREFIX |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4548 G1PPRL_TYPE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4549 G1PPRL_ADDR_BASE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4550 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4551 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4552 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4553 G1PPRL_DOUBLE_H_FORMAT |
12080 | 4554 G1PPRL_BYTE_H_FORMAT |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4555 G1PPRL_BYTE_H_FORMAT, |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4556 "type", "address-range", |
12080 | 4557 "used", "prev-live", "next-live", "gc-eff", |
4558 "remset", "code-roots"); | |
3977
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4559 _out->print_cr(G1PPRL_LINE_PREFIX |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4560 G1PPRL_TYPE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4561 G1PPRL_ADDR_BASE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4562 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4563 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4564 G1PPRL_BYTE_H_FORMAT |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4565 G1PPRL_DOUBLE_H_FORMAT |
12080 | 4566 G1PPRL_BYTE_H_FORMAT |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4567 G1PPRL_BYTE_H_FORMAT, |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4568 "", "", |
12080 | 4569 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)", |
4570 "(bytes)", "(bytes)"); | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4571 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4572 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4573 // It takes as a parameter a reference to one of the _hum_* fields, it |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4574 // deduces the corresponding value for a region in a humongous region |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4575 // series (either the region size, or what's left if the _hum_* field |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4576 // is < the region size), and updates the _hum_* field accordingly. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4577 size_t G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* hum_bytes) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4578 size_t bytes = 0; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4579 // The > 0 check is to deal with the prev and next live bytes which |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4580 // could be 0. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4581 if (*hum_bytes > 0) { |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3979
diff
changeset
|
4582 bytes = MIN2(HeapRegion::GrainBytes, *hum_bytes); |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4583 *hum_bytes -= bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4584 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4585 return bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4586 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4587 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4588 // It deduces the values for a region in a humongous region series |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4589 // from the _hum_* fields and updates those accordingly. It assumes |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4590 // that that _hum_* fields have already been set up from the "starts |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4591 // humongous" region and we visit the regions in address order. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4592 void G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* used_bytes, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4593 size_t* capacity_bytes, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4594 size_t* prev_live_bytes, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4595 size_t* next_live_bytes) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4596 assert(_hum_used_bytes > 0 && _hum_capacity_bytes > 0, "pre-condition"); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4597 *used_bytes = get_hum_bytes(&_hum_used_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4598 *capacity_bytes = get_hum_bytes(&_hum_capacity_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4599 *prev_live_bytes = get_hum_bytes(&_hum_prev_live_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4600 *next_live_bytes = get_hum_bytes(&_hum_next_live_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4601 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4602 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4603 bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4604 const char* type = ""; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4605 HeapWord* bottom = r->bottom(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4606 HeapWord* end = r->end(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4607 size_t capacity_bytes = r->capacity(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4608 size_t used_bytes = r->used(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4609 size_t prev_live_bytes = r->live_bytes(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4610 size_t next_live_bytes = r->next_live_bytes(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4611 double gc_eff = r->gc_efficiency(); |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4612 size_t remset_bytes = r->rem_set()->mem_size(); |
12080 | 4613 size_t strong_code_roots_bytes = r->rem_set()->strong_code_roots_mem_size(); |
4614 | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4615 if (r->used() == 0) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4616 type = "FREE"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4617 } else if (r->is_survivor()) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4618 type = "SURV"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4619 } else if (r->is_young()) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4620 type = "EDEN"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4621 } else if (r->startsHumongous()) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4622 type = "HUMS"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4623 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4624 assert(_hum_used_bytes == 0 && _hum_capacity_bytes == 0 && |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4625 _hum_prev_live_bytes == 0 && _hum_next_live_bytes == 0, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4626 "they should have been zeroed after the last time we used them"); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4627 // Set up the _hum_* fields. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4628 _hum_capacity_bytes = capacity_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4629 _hum_used_bytes = used_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4630 _hum_prev_live_bytes = prev_live_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4631 _hum_next_live_bytes = next_live_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4632 get_hum_bytes(&used_bytes, &capacity_bytes, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4633 &prev_live_bytes, &next_live_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4634 end = bottom + HeapRegion::GrainWords; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4635 } else if (r->continuesHumongous()) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4636 type = "HUMC"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4637 get_hum_bytes(&used_bytes, &capacity_bytes, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4638 &prev_live_bytes, &next_live_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4639 assert(end == bottom + HeapRegion::GrainWords, "invariant"); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4640 } else { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4641 type = "OLD"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4642 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4643 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4644 _total_used_bytes += used_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4645 _total_capacity_bytes += capacity_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4646 _total_prev_live_bytes += prev_live_bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4647 _total_next_live_bytes += next_live_bytes; |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4648 _total_remset_bytes += remset_bytes; |
12080 | 4649 _total_strong_code_roots_bytes += strong_code_roots_bytes; |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4650 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4651 // Print a line for this particular region. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4652 _out->print_cr(G1PPRL_LINE_PREFIX |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4653 G1PPRL_TYPE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4654 G1PPRL_ADDR_BASE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4655 G1PPRL_BYTE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4656 G1PPRL_BYTE_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4657 G1PPRL_BYTE_FORMAT |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4658 G1PPRL_DOUBLE_FORMAT |
12080 | 4659 G1PPRL_BYTE_FORMAT |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4660 G1PPRL_BYTE_FORMAT, |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4661 type, bottom, end, |
12080 | 4662 used_bytes, prev_live_bytes, next_live_bytes, gc_eff, |
4663 remset_bytes, strong_code_roots_bytes); | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4664 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4665 return false; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4666 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4667 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4668 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() { |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4669 // add static memory usages to remembered set sizes |
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4670 _total_remset_bytes += HeapRegionRemSet::fl_mem_size() + HeapRegionRemSet::static_mem_size(); |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4671 // Print the footer of the output. |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4672 _out->print_cr(G1PPRL_LINE_PREFIX); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4673 _out->print_cr(G1PPRL_LINE_PREFIX |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4674 " SUMMARY" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4675 G1PPRL_SUM_MB_FORMAT("capacity") |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4676 G1PPRL_SUM_MB_PERC_FORMAT("used") |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4677 G1PPRL_SUM_MB_PERC_FORMAT("prev-live") |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4678 G1PPRL_SUM_MB_PERC_FORMAT("next-live") |
12080 | 4679 G1PPRL_SUM_MB_FORMAT("remset") |
4680 G1PPRL_SUM_MB_FORMAT("code-roots"), | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4681 bytes_to_mb(_total_capacity_bytes), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4682 bytes_to_mb(_total_used_bytes), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4683 perc(_total_used_bytes, _total_capacity_bytes), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4684 bytes_to_mb(_total_prev_live_bytes), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4685 perc(_total_prev_live_bytes, _total_capacity_bytes), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4686 bytes_to_mb(_total_next_live_bytes), |
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
10186
diff
changeset
|
4687 perc(_total_next_live_bytes, _total_capacity_bytes), |
12080 | 4688 bytes_to_mb(_total_remset_bytes), |
4689 bytes_to_mb(_total_strong_code_roots_bytes)); | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4690 _out->cr(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4691 } |