Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 3932:b0efc7ee3b31
7085860: JSR 292: implement CallSite.setTargetNormal and setTargetVolatile as native methods
Reviewed-by: jrose, never
author | twisti |
---|---|
date | Thu, 08 Sep 2011 05:11:31 -0700 |
parents | 5f6f2615433a |
children | ff53346271fe |
rev | line source |
---|---|
342 | 1 /* |
2149 | 2 * Copyright (c) 2001, 2011, 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" | |
3771 | 31 #include "gc_implementation/g1/g1OopClosures.inline.hpp" |
1972 | 32 #include "gc_implementation/g1/g1RemSet.hpp" |
33 #include "gc_implementation/g1/heapRegionRemSet.hpp" | |
34 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
35 #include "gc_implementation/shared/vmGCOperations.hpp" |
1972 | 36 #include "memory/genOopClosures.inline.hpp" |
37 #include "memory/referencePolicy.hpp" | |
38 #include "memory/resourceArea.hpp" | |
39 #include "oops/oop.inline.hpp" | |
40 #include "runtime/handles.inline.hpp" | |
41 #include "runtime/java.hpp" | |
342 | 42 |
43 // | |
44 // CMS Bit Map Wrapper | |
45 | |
46 CMBitMapRO::CMBitMapRO(ReservedSpace rs, int shifter): | |
47 _bm((uintptr_t*)NULL,0), | |
48 _shifter(shifter) { | |
49 _bmStartWord = (HeapWord*)(rs.base()); | |
50 _bmWordSize = rs.size()/HeapWordSize; // rs.size() is in bytes | |
51 ReservedSpace brs(ReservedSpace::allocation_align_size_up( | |
52 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1)); | |
53 | |
54 guarantee(brs.is_reserved(), "couldn't allocate CMS bit map"); | |
55 // For now we'll just commit all of the bit map up fromt. | |
56 // Later on we'll try to be more parsimonious with swap. | |
57 guarantee(_virtual_space.initialize(brs, brs.size()), | |
58 "couldn't reseve backing store for CMS bit map"); | |
59 assert(_virtual_space.committed_size() == brs.size(), | |
60 "didn't reserve backing store for all of CMS bit map?"); | |
61 _bm.set_map((uintptr_t*)_virtual_space.low()); | |
62 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >= | |
63 _bmWordSize, "inconsistency in bit map sizing"); | |
64 _bm.set_size(_bmWordSize >> _shifter); | |
65 } | |
66 | |
67 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr, | |
68 HeapWord* limit) const { | |
69 // First we must round addr *up* to a possible object boundary. | |
70 addr = (HeapWord*)align_size_up((intptr_t)addr, | |
71 HeapWordSize << _shifter); | |
72 size_t addrOffset = heapWordToOffset(addr); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
73 if (limit == NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
74 limit = _bmStartWord + _bmWordSize; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
75 } |
342 | 76 size_t limitOffset = heapWordToOffset(limit); |
77 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset); | |
78 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
79 assert(nextAddr >= addr, "get_next_one postcondition"); | |
80 assert(nextAddr == limit || isMarked(nextAddr), | |
81 "get_next_one postcondition"); | |
82 return nextAddr; | |
83 } | |
84 | |
85 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr, | |
86 HeapWord* limit) const { | |
87 size_t addrOffset = heapWordToOffset(addr); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
88 if (limit == NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
89 limit = _bmStartWord + _bmWordSize; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
90 } |
342 | 91 size_t limitOffset = heapWordToOffset(limit); |
92 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset); | |
93 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
94 assert(nextAddr >= addr, "get_next_one postcondition"); | |
95 assert(nextAddr == limit || !isMarked(nextAddr), | |
96 "get_next_one postcondition"); | |
97 return nextAddr; | |
98 } | |
99 | |
100 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const { | |
101 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check"); | |
102 return (int) (diff >> _shifter); | |
103 } | |
104 | |
105 bool CMBitMapRO::iterate(BitMapClosure* cl, MemRegion mr) { | |
106 HeapWord* left = MAX2(_bmStartWord, mr.start()); | |
107 HeapWord* right = MIN2(_bmStartWord + _bmWordSize, mr.end()); | |
108 if (right > left) { | |
109 // Right-open interval [leftOffset, rightOffset). | |
110 return _bm.iterate(cl, heapWordToOffset(left), heapWordToOffset(right)); | |
111 } else { | |
112 return true; | |
113 } | |
114 } | |
115 | |
116 void CMBitMapRO::mostly_disjoint_range_union(BitMap* from_bitmap, | |
117 size_t from_start_index, | |
118 HeapWord* to_start_word, | |
119 size_t word_num) { | |
120 _bm.mostly_disjoint_range_union(from_bitmap, | |
121 from_start_index, | |
122 heapWordToOffset(to_start_word), | |
123 word_num); | |
124 } | |
125 | |
126 #ifndef PRODUCT | |
127 bool CMBitMapRO::covers(ReservedSpace rs) const { | |
128 // assert(_bm.map() == _virtual_space.low(), "map inconsistency"); | |
645
c3a720eefe82
6816308: Changes to allow builds with latest Windows SDK 6.1 on 64bit Windows 2003
kvn
parents:
619
diff
changeset
|
129 assert(((size_t)_bm.size() * (size_t)(1 << _shifter)) == _bmWordSize, |
342 | 130 "size inconsistency"); |
131 return _bmStartWord == (HeapWord*)(rs.base()) && | |
132 _bmWordSize == rs.size()>>LogHeapWordSize; | |
133 } | |
134 #endif | |
135 | |
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 | |
182 void CMMarkStack::allocate(size_t size) { | |
183 _base = NEW_C_HEAP_ARRAY(oop, size); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
184 if (_base == NULL) { |
342 | 185 vm_exit_during_initialization("Failed to allocate " |
186 "CM region mark stack"); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
187 } |
342 | 188 _index = 0; |
189 _capacity = (jint) size; | |
190 _oops_do_bound = -1; | |
191 NOT_PRODUCT(_max_depth = 0); | |
192 } | |
193 | |
194 CMMarkStack::~CMMarkStack() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
195 if (_base != NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
196 FREE_C_HEAP_ARRAY(oop, _base); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
197 } |
342 | 198 } |
199 | |
200 void CMMarkStack::par_push(oop ptr) { | |
201 while (true) { | |
202 if (isFull()) { | |
203 _overflow = true; | |
204 return; | |
205 } | |
206 // Otherwise... | |
207 jint index = _index; | |
208 jint next_index = index+1; | |
209 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
210 if (res == index) { | |
211 _base[index] = ptr; | |
212 // Note that we don't maintain this atomically. We could, but it | |
213 // doesn't seem necessary. | |
214 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
215 return; | |
216 } | |
217 // Otherwise, we need to try again. | |
218 } | |
219 } | |
220 | |
221 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) { | |
222 while (true) { | |
223 if (isFull()) { | |
224 _overflow = true; | |
225 return; | |
226 } | |
227 // Otherwise... | |
228 jint index = _index; | |
229 jint next_index = index + n; | |
230 if (next_index > _capacity) { | |
231 _overflow = true; | |
232 return; | |
233 } | |
234 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
235 if (res == index) { | |
236 for (int i = 0; i < n; i++) { | |
237 int ind = index + i; | |
238 assert(ind < _capacity, "By overflow test above."); | |
239 _base[ind] = ptr_arr[i]; | |
240 } | |
241 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
242 return; | |
243 } | |
244 // Otherwise, we need to try again. | |
245 } | |
246 } | |
247 | |
248 | |
249 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) { | |
250 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
251 jint start = _index; | |
252 jint next_index = start + n; | |
253 if (next_index > _capacity) { | |
254 _overflow = true; | |
255 return; | |
256 } | |
257 // Otherwise. | |
258 _index = next_index; | |
259 for (int i = 0; i < n; i++) { | |
260 int ind = start + i; | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
261 assert(ind < _capacity, "By overflow test above."); |
342 | 262 _base[ind] = ptr_arr[i]; |
263 } | |
264 } | |
265 | |
266 | |
267 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) { | |
268 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
269 jint index = _index; | |
270 if (index == 0) { | |
271 *n = 0; | |
272 return false; | |
273 } else { | |
274 int k = MIN2(max, index); | |
275 jint new_ind = index - k; | |
276 for (int j = 0; j < k; j++) { | |
277 ptr_arr[j] = _base[new_ind + j]; | |
278 } | |
279 _index = new_ind; | |
280 *n = k; | |
281 return true; | |
282 } | |
283 } | |
284 | |
285 | |
286 CMRegionStack::CMRegionStack() : _base(NULL) {} | |
287 | |
288 void CMRegionStack::allocate(size_t size) { | |
289 _base = NEW_C_HEAP_ARRAY(MemRegion, size); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
290 if (_base == NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
291 vm_exit_during_initialization("Failed to allocate CM region mark stack"); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
292 } |
342 | 293 _index = 0; |
294 _capacity = (jint) size; | |
295 } | |
296 | |
297 CMRegionStack::~CMRegionStack() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
298 if (_base != NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
299 FREE_C_HEAP_ARRAY(oop, _base); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
300 } |
342 | 301 } |
302 | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
303 void CMRegionStack::push_lock_free(MemRegion mr) { |
342 | 304 assert(mr.word_size() > 0, "Precondition"); |
305 while (true) { | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
306 jint index = _index; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
307 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
308 if (index >= _capacity) { |
342 | 309 _overflow = true; |
310 return; | |
311 } | |
312 // Otherwise... | |
313 jint next_index = index+1; | |
314 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
315 if (res == index) { | |
316 _base[index] = mr; | |
317 return; | |
318 } | |
319 // Otherwise, we need to try again. | |
320 } | |
321 } | |
322 | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
323 // Lock-free pop of the region stack. Called during the concurrent |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
324 // marking / remark phases. Should only be called in tandem with |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
325 // other lock-free pops. |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
326 MemRegion CMRegionStack::pop_lock_free() { |
342 | 327 while (true) { |
328 jint index = _index; | |
329 | |
330 if (index == 0) { | |
331 return MemRegion(); | |
332 } | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
333 // Otherwise... |
342 | 334 jint next_index = index-1; |
335 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
336 if (res == index) { | |
337 MemRegion mr = _base[next_index]; | |
338 if (mr.start() != NULL) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
339 assert(mr.end() != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
340 assert(mr.word_size() > 0, "invariant"); |
342 | 341 return mr; |
342 } else { | |
343 // that entry was invalidated... let's skip it | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
344 assert(mr.end() == NULL, "invariant"); |
342 | 345 } |
346 } | |
347 // Otherwise, we need to try again. | |
348 } | |
349 } | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
350 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
351 #if 0 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
352 // The routines that manipulate the region stack with a lock are |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
353 // not currently used. They should be retained, however, as a |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
354 // diagnostic aid. |
1358
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
355 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
356 void CMRegionStack::push_with_lock(MemRegion mr) { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
357 assert(mr.word_size() > 0, "Precondition"); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
358 MutexLockerEx x(CMRegionStack_lock, Mutex::_no_safepoint_check_flag); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
359 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
360 if (isFull()) { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
361 _overflow = true; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
362 return; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
363 } |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
364 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
365 _base[_index] = mr; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
366 _index += 1; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
367 } |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
368 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
369 MemRegion CMRegionStack::pop_with_lock() { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
370 MutexLockerEx x(CMRegionStack_lock, Mutex::_no_safepoint_check_flag); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
371 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
372 while (true) { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
373 if (_index == 0) { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
374 return MemRegion(); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
375 } |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
376 _index -= 1; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
377 |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
378 MemRegion mr = _base[_index]; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
379 if (mr.start() != NULL) { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
380 assert(mr.end() != NULL, "invariant"); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
381 assert(mr.word_size() > 0, "invariant"); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
382 return mr; |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
383 } else { |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
384 // that entry was invalidated... let's skip it |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
385 assert(mr.end() == NULL, "invariant"); |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
386 } |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
387 } |
72f725c5a7be
6940310: G1: MT-unsafe calls to CM::region_stack_push() / CM::region_stack_pop()
tonyp
parents:
1317
diff
changeset
|
388 } |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
389 #endif |
342 | 390 |
391 bool CMRegionStack::invalidate_entries_into_cset() { | |
392 bool result = false; | |
393 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
394 for (int i = 0; i < _oops_do_bound; ++i) { | |
395 MemRegion mr = _base[i]; | |
396 if (mr.start() != NULL) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
397 assert(mr.end() != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
398 assert(mr.word_size() > 0, "invariant"); |
342 | 399 HeapRegion* hr = g1h->heap_region_containing(mr.start()); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
400 assert(hr != NULL, "invariant"); |
342 | 401 if (hr->in_collection_set()) { |
402 // The region points into the collection set | |
403 _base[i] = MemRegion(); | |
404 result = true; | |
405 } | |
406 } else { | |
407 // that entry was invalidated... let's skip it | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
408 assert(mr.end() == NULL, "invariant"); |
342 | 409 } |
410 } | |
411 return result; | |
412 } | |
413 | |
414 template<class OopClosureClass> | |
415 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) { | |
416 assert(!_drain_in_progress || !_drain_in_progress_yields || yield_after | |
417 || SafepointSynchronize::is_at_safepoint(), | |
418 "Drain recursion must be yield-safe."); | |
419 bool res = true; | |
420 debug_only(_drain_in_progress = true); | |
421 debug_only(_drain_in_progress_yields = yield_after); | |
422 while (!isEmpty()) { | |
423 oop newOop = pop(); | |
424 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop"); | |
425 assert(newOop->is_oop(), "Expected an oop"); | |
426 assert(bm == NULL || bm->isMarked((HeapWord*)newOop), | |
427 "only grey objects on this stack"); | |
428 // iterate over the oops in this oop, marking and pushing | |
429 // the ones in CMS generation. | |
430 newOop->oop_iterate(cl); | |
431 if (yield_after && _cm->do_yield_check()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
432 res = false; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
433 break; |
342 | 434 } |
435 } | |
436 debug_only(_drain_in_progress = false); | |
437 return res; | |
438 } | |
439 | |
440 void CMMarkStack::oops_do(OopClosure* f) { | |
441 if (_index == 0) return; | |
442 assert(_oops_do_bound != -1 && _oops_do_bound <= _index, | |
443 "Bound must be set."); | |
444 for (int i = 0; i < _oops_do_bound; i++) { | |
445 f->do_oop(&_base[i]); | |
446 } | |
447 _oops_do_bound = -1; | |
448 } | |
449 | |
450 bool ConcurrentMark::not_yet_marked(oop obj) const { | |
451 return (_g1h->is_obj_ill(obj) | |
452 || (_g1h->is_in_permanent(obj) | |
453 && !nextMarkBitMap()->isMarked((HeapWord*)obj))); | |
454 } | |
455 | |
456 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
457 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
458 #endif // _MSC_VER | |
459 | |
460 ConcurrentMark::ConcurrentMark(ReservedSpace rs, | |
461 int max_regions) : | |
462 _markBitMap1(rs, MinObjAlignment - 1), | |
463 _markBitMap2(rs, MinObjAlignment - 1), | |
464 | |
465 _parallel_marking_threads(0), | |
466 _sleep_factor(0.0), | |
467 _marking_task_overhead(1.0), | |
468 _cleanup_sleep_factor(0.0), | |
469 _cleanup_task_overhead(1.0), | |
2152 | 470 _cleanup_list("Cleanup List"), |
342 | 471 _region_bm(max_regions, false /* in_resource_area*/), |
472 _card_bm((rs.size() + CardTableModRefBS::card_size - 1) >> | |
473 CardTableModRefBS::card_shift, | |
474 false /* in_resource_area*/), | |
475 _prevMarkBitMap(&_markBitMap1), | |
476 _nextMarkBitMap(&_markBitMap2), | |
477 _at_least_one_mark_complete(false), | |
478 | |
479 _markStack(this), | |
480 _regionStack(), | |
481 // _finger set in set_non_marking_state | |
482 | |
483 _max_task_num(MAX2(ParallelGCThreads, (size_t)1)), | |
484 // _active_tasks set in set_non_marking_state | |
485 // _tasks set inside the constructor | |
486 _task_queues(new CMTaskQueueSet((int) _max_task_num)), | |
487 _terminator(ParallelTaskTerminator((int) _max_task_num, _task_queues)), | |
488 | |
489 _has_overflown(false), | |
490 _concurrent(false), | |
619
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
491 _has_aborted(false), |
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
492 _restart_for_overflow(false), |
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
493 _concurrent_marking_in_progress(false), |
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
494 _should_gray_objects(false), |
342 | 495 |
496 // _verbose_level set below | |
497 | |
498 _init_times(), | |
499 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(), | |
500 _cleanup_times(), | |
501 _total_counting_time(0.0), | |
502 _total_rs_scrub_time(0.0), | |
503 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
504 _parallel_workers(NULL) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
505 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
506 if (verbose_level < no_verbose) { |
342 | 507 verbose_level = no_verbose; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
508 } |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
509 if (verbose_level > high_verbose) { |
342 | 510 verbose_level = high_verbose; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
511 } |
342 | 512 _verbose_level = verbose_level; |
513 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
514 if (verbose_low()) { |
342 | 515 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", " |
516 "heap end = "PTR_FORMAT, _heap_start, _heap_end); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
517 } |
342 | 518 |
1284 | 519 _markStack.allocate(MarkStackSize); |
751 | 520 _regionStack.allocate(G1MarkRegionStackSize); |
342 | 521 |
522 // Create & start a ConcurrentMark thread. | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
523 _cmThread = new ConcurrentMarkThread(this); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
524 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
|
525 assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
526 |
342 | 527 _g1h = G1CollectedHeap::heap(); |
528 assert(CGC_lock != NULL, "Where's the CGC_lock?"); | |
529 assert(_markBitMap1.covers(rs), "_markBitMap1 inconsistency"); | |
530 assert(_markBitMap2.covers(rs), "_markBitMap2 inconsistency"); | |
531 | |
532 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); | |
1282 | 533 satb_qs.set_buffer_size(G1SATBBufferSize); |
342 | 534 |
535 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_task_num); | |
536 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_task_num); | |
537 | |
538 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail | |
539 _active_tasks = _max_task_num; | |
540 for (int i = 0; i < (int) _max_task_num; ++i) { | |
541 CMTaskQueue* task_queue = new CMTaskQueue(); | |
542 task_queue->initialize(); | |
543 _task_queues->register_queue(i, task_queue); | |
544 | |
545 _tasks[i] = new CMTask(i, this, task_queue, _task_queues); | |
546 _accum_task_vtime[i] = 0.0; | |
547 } | |
548 | |
1284 | 549 if (ConcGCThreads > ParallelGCThreads) { |
550 vm_exit_during_initialization("Can't have more ConcGCThreads " | |
342 | 551 "than ParallelGCThreads."); |
552 } | |
553 if (ParallelGCThreads == 0) { | |
554 // if we are not running with any parallel GC threads we will not | |
555 // spawn any marking threads either | |
556 _parallel_marking_threads = 0; | |
557 _sleep_factor = 0.0; | |
558 _marking_task_overhead = 1.0; | |
559 } else { | |
1284 | 560 if (ConcGCThreads > 0) { |
561 // notice that ConcGCThreads overwrites G1MarkingOverheadPercent | |
342 | 562 // if both are set |
563 | |
1284 | 564 _parallel_marking_threads = ConcGCThreads; |
342 | 565 _sleep_factor = 0.0; |
566 _marking_task_overhead = 1.0; | |
751 | 567 } else if (G1MarkingOverheadPercent > 0) { |
342 | 568 // we will calculate the number of parallel marking threads |
569 // based on a target overhead with respect to the soft real-time | |
570 // goal | |
571 | |
751 | 572 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0; |
342 | 573 double overall_cm_overhead = |
751 | 574 (double) MaxGCPauseMillis * marking_overhead / |
575 (double) GCPauseIntervalMillis; | |
342 | 576 double cpu_ratio = 1.0 / (double) os::processor_count(); |
577 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio); | |
578 double marking_task_overhead = | |
579 overall_cm_overhead / marking_thread_num * | |
580 (double) os::processor_count(); | |
581 double sleep_factor = | |
582 (1.0 - marking_task_overhead) / marking_task_overhead; | |
583 | |
584 _parallel_marking_threads = (size_t) marking_thread_num; | |
585 _sleep_factor = sleep_factor; | |
586 _marking_task_overhead = marking_task_overhead; | |
587 } else { | |
588 _parallel_marking_threads = MAX2((ParallelGCThreads + 2) / 4, (size_t)1); | |
589 _sleep_factor = 0.0; | |
590 _marking_task_overhead = 1.0; | |
591 } | |
592 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
593 if (parallel_marking_threads() > 1) { |
342 | 594 _cleanup_task_overhead = 1.0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
595 } else { |
342 | 596 _cleanup_task_overhead = marking_task_overhead(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
597 } |
342 | 598 _cleanup_sleep_factor = |
599 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead(); | |
600 | |
601 #if 0 | |
602 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads()); | |
603 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead()); | |
604 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor()); | |
605 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead()); | |
606 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor()); | |
607 #endif | |
608 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
609 guarantee(parallel_marking_threads() > 0, "peace of mind"); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
610 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads", |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
611 (int) _parallel_marking_threads, false, true); |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
612 if (_parallel_workers == NULL) { |
342 | 613 vm_exit_during_initialization("Failed necessary allocation."); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
614 } else { |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
615 _parallel_workers->initialize_workers(); |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
616 } |
342 | 617 } |
618 | |
619 // so that the call below can read a sensible value | |
620 _heap_start = (HeapWord*) rs.base(); | |
621 set_non_marking_state(); | |
622 } | |
623 | |
624 void ConcurrentMark::update_g1_committed(bool force) { | |
625 // If concurrent marking is not in progress, then we do not need to | |
626 // update _heap_end. This has a subtle and important | |
627 // side-effect. Imagine that two evacuation pauses happen between | |
628 // marking completion and remark. The first one can grow the | |
629 // heap (hence now the finger is below the heap end). Then, the | |
630 // second one could unnecessarily push regions on the region | |
631 // stack. This causes the invariant that the region stack is empty | |
632 // at the beginning of remark to be false. By ensuring that we do | |
633 // not observe heap expansions after marking is complete, then we do | |
634 // not have this problem. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
635 if (!concurrent_marking_in_progress() && !force) return; |
342 | 636 |
637 MemRegion committed = _g1h->g1_committed(); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
638 assert(committed.start() == _heap_start, "start shouldn't change"); |
342 | 639 HeapWord* new_end = committed.end(); |
640 if (new_end > _heap_end) { | |
641 // The heap has been expanded. | |
642 | |
643 _heap_end = new_end; | |
644 } | |
645 // Notice that the heap can also shrink. However, this only happens | |
646 // during a Full GC (at least currently) and the entire marking | |
647 // phase will bail out and the task will not be restarted. So, let's | |
648 // do nothing. | |
649 } | |
650 | |
651 void ConcurrentMark::reset() { | |
652 // Starting values for these two. This should be called in a STW | |
653 // phase. CM will be notified of any future g1_committed expansions | |
654 // will be at the end of evacuation pauses, when tasks are | |
655 // inactive. | |
656 MemRegion committed = _g1h->g1_committed(); | |
657 _heap_start = committed.start(); | |
658 _heap_end = committed.end(); | |
659 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
660 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
661 assert(_heap_start != NULL, "heap bounds should look ok"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
662 assert(_heap_end != NULL, "heap bounds should look ok"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
663 assert(_heap_start < _heap_end, "heap bounds should look ok"); |
342 | 664 |
665 // reset all the marking data structures and any necessary flags | |
666 clear_marking_state(); | |
667 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
668 if (verbose_low()) { |
342 | 669 gclog_or_tty->print_cr("[global] resetting"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
670 } |
342 | 671 |
672 // We do reset all of them, since different phases will use | |
673 // different number of active threads. So, it's easiest to have all | |
674 // of them ready. | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
675 for (int i = 0; i < (int) _max_task_num; ++i) { |
342 | 676 _tasks[i]->reset(_nextMarkBitMap); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
677 } |
342 | 678 |
679 // we need this to make sure that the flag is on during the evac | |
680 // pause with initial mark piggy-backed | |
681 set_concurrent_marking_in_progress(); | |
682 } | |
683 | |
684 void ConcurrentMark::set_phase(size_t active_tasks, bool concurrent) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
685 assert(active_tasks <= _max_task_num, "we should not have more"); |
342 | 686 |
687 _active_tasks = active_tasks; | |
688 // Need to update the three data structures below according to the | |
689 // number of active threads for this phase. | |
690 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues); | |
691 _first_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
692 _second_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
693 | |
694 _concurrent = concurrent; | |
695 // We propagate this to all tasks, not just the active ones. | |
696 for (int i = 0; i < (int) _max_task_num; ++i) | |
697 _tasks[i]->set_concurrent(concurrent); | |
698 | |
699 if (concurrent) { | |
700 set_concurrent_marking_in_progress(); | |
701 } else { | |
702 // We currently assume that the concurrent flag has been set to | |
703 // false before we start remark. At this point we should also be | |
704 // in a STW phase. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
705 assert(!concurrent_marking_in_progress(), "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
706 assert(_finger == _heap_end, "only way to get here"); |
342 | 707 update_g1_committed(true); |
708 } | |
709 } | |
710 | |
711 void ConcurrentMark::set_non_marking_state() { | |
712 // We set the global marking state to some default values when we're | |
713 // not doing marking. | |
714 clear_marking_state(); | |
715 _active_tasks = 0; | |
716 clear_concurrent_marking_in_progress(); | |
717 } | |
718 | |
719 ConcurrentMark::~ConcurrentMark() { | |
720 for (int i = 0; i < (int) _max_task_num; ++i) { | |
721 delete _task_queues->queue(i); | |
722 delete _tasks[i]; | |
723 } | |
724 delete _task_queues; | |
725 FREE_C_HEAP_ARRAY(CMTask*, _max_task_num); | |
726 } | |
727 | |
728 // This closure is used to mark refs into the g1 generation | |
729 // from external roots in the CMS bit map. | |
730 // Called at the first checkpoint. | |
731 // | |
732 | |
733 void ConcurrentMark::clearNextBitmap() { | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
734 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
735 G1CollectorPolicy* g1p = g1h->g1_policy(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
736 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
737 // 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
|
738 // the current cycle. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
739 guarantee(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
740 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
741 // 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
|
742 // 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
|
743 // 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
|
744 // is the case. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
745 guarantee(!g1h->mark_in_progress(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
746 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
747 // 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
|
748 // 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
|
749 // each chunk. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
750 HeapWord* start = _nextMarkBitMap->startWord(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
751 HeapWord* end = _nextMarkBitMap->endWord(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
752 HeapWord* cur = start; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
753 size_t chunkSize = M; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
754 while (cur < end) { |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
755 HeapWord* next = cur + chunkSize; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
756 if (next > end) { |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
757 next = end; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
758 } |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
759 MemRegion mr(cur,next); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
760 _nextMarkBitMap->clearRange(mr); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
761 cur = next; |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
762 do_yield_check(); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
763 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
764 // 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
|
765 // 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
|
766 // 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
|
767 // clearing to get some checking in the product. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
768 assert(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
769 assert(!g1h->mark_in_progress(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
770 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
771 |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
772 // Repeat the asserts from above. |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
773 guarantee(cmThread()->during_cycle(), "invariant"); |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
774 guarantee(!g1h->mark_in_progress(), "invariant"); |
342 | 775 } |
776 | |
777 class NoteStartOfMarkHRClosure: public HeapRegionClosure { | |
778 public: | |
779 bool doHeapRegion(HeapRegion* r) { | |
780 if (!r->continuesHumongous()) { | |
781 r->note_start_of_marking(true); | |
782 } | |
783 return false; | |
784 } | |
785 }; | |
786 | |
787 void ConcurrentMark::checkpointRootsInitialPre() { | |
788 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
789 G1CollectorPolicy* g1p = g1h->g1_policy(); | |
790 | |
791 _has_aborted = false; | |
792 | |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
793 #ifndef PRODUCT |
1044 | 794 if (G1PrintReachableAtInitialMark) { |
1388 | 795 print_reachable("at-cycle-start", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
796 VerifyOption_G1UsePrevMarking, true /* all */); |
1044 | 797 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
798 #endif |
342 | 799 |
800 // Initialise marking structures. This has to be done in a STW phase. | |
801 reset(); | |
802 } | |
803 | |
804 class CMMarkRootsClosure: public OopsInGenClosure { | |
805 private: | |
806 ConcurrentMark* _cm; | |
807 G1CollectedHeap* _g1h; | |
808 bool _do_barrier; | |
809 | |
810 public: | |
811 CMMarkRootsClosure(ConcurrentMark* cm, | |
812 G1CollectedHeap* g1h, | |
813 bool do_barrier) : _cm(cm), _g1h(g1h), | |
814 _do_barrier(do_barrier) { } | |
815 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
816 virtual 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
|
817 virtual 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
|
818 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
819 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
|
820 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
821 if (!oopDesc::is_null(heap_oop)) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
822 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
823 assert(obj->is_oop() || obj->mark() == NULL, |
342 | 824 "expected an oop, possibly with mark word displaced"); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
825 HeapWord* addr = (HeapWord*)obj; |
342 | 826 if (_g1h->is_in_g1_reserved(addr)) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
827 _cm->grayRoot(obj); |
342 | 828 } |
829 } | |
830 if (_do_barrier) { | |
831 assert(!_g1h->is_in_g1_reserved(p), | |
832 "Should be called on external roots"); | |
833 do_barrier(p); | |
834 } | |
835 } | |
836 }; | |
837 | |
838 void ConcurrentMark::checkpointRootsInitialPost() { | |
839 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
840 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
841 // 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
|
842 // 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
|
843 // 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
|
844 // 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
|
845 // 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
|
846 // 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
|
847 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
|
848 |
342 | 849 // For each region note start of marking. |
850 NoteStartOfMarkHRClosure startcl; | |
851 g1h->heap_region_iterate(&startcl); | |
852 | |
853 // Start weak-reference discovery. | |
854 ReferenceProcessor* rp = g1h->ref_processor(); | |
855 rp->verify_no_references_recorded(); | |
856 rp->enable_discovery(); // enable ("weak") refs discovery | |
457
27a80744a83b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
453
diff
changeset
|
857 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle |
342 | 858 |
859 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
|
860 // 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
|
861 // 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
|
862 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
|
863 false /* expected_active */); |
342 | 864 |
865 // update_g1_committed() will be called at the end of an evac pause | |
866 // when marking is on. So, it's also called at the end of the | |
867 // initial-mark pause to update the heap end, if the heap expands | |
868 // during it. No need to call it here. | |
869 } | |
870 | |
871 // Checkpoint the roots into this generation from outside | |
872 // this generation. [Note this initial checkpoint need only | |
873 // be approximate -- we'll do a catch up phase subsequently.] | |
874 void ConcurrentMark::checkpointRootsInitial() { | |
875 assert(SafepointSynchronize::is_at_safepoint(), "world should be stopped"); | |
876 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
877 | |
878 double start = os::elapsedTime(); | |
879 | |
880 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy(); | |
881 g1p->record_concurrent_mark_init_start(); | |
882 checkpointRootsInitialPre(); | |
883 | |
884 // YSR: when concurrent precleaning is in place, we'll | |
885 // need to clear the cached card table here | |
886 | |
887 ResourceMark rm; | |
888 HandleMark hm; | |
889 | |
890 g1h->ensure_parsability(false); | |
891 g1h->perm_gen()->save_marks(); | |
892 | |
893 CMMarkRootsClosure notOlder(this, g1h, false); | |
894 CMMarkRootsClosure older(this, g1h, true); | |
895 | |
896 g1h->set_marking_started(); | |
897 g1h->rem_set()->prepare_for_younger_refs_iterate(false); | |
898 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
899 g1h->process_strong_roots(true, // activate StrongRootsScope |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
900 false, // fake perm gen collection |
342 | 901 SharedHeap::SO_AllClasses, |
902 ¬Older, // Regular roots | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
903 NULL, // do not visit active blobs |
342 | 904 &older // Perm Gen Roots |
905 ); | |
906 checkpointRootsInitialPost(); | |
907 | |
908 // Statistics. | |
909 double end = os::elapsedTime(); | |
910 _init_times.add((end - start) * 1000.0); | |
911 | |
912 g1p->record_concurrent_mark_init_end(); | |
913 } | |
914 | |
915 /* | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
916 * 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
|
917 * 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
|
918 * 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
|
919 * 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
|
920 * 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
|
921 * 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
|
922 * |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
923 * 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
|
924 * 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
|
925 * 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
|
926 * (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
|
927 * 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
|
928 * |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
929 * 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
|
930 * 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
|
931 * 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
|
932 * 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
|
933 * 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
|
934 */ |
342 | 935 |
936 void ConcurrentMark::enter_first_sync_barrier(int task_num) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
937 if (verbose_low()) { |
342 | 938 gclog_or_tty->print_cr("[%d] entering first barrier", task_num); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
939 } |
342 | 940 |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
941 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
|
942 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
|
943 } |
342 | 944 _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
|
945 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
|
946 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
|
947 } |
342 | 948 // at this point everyone should have synced up and not be doing any |
949 // more work | |
950 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
951 if (verbose_low()) { |
342 | 952 gclog_or_tty->print_cr("[%d] leaving first barrier", task_num); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
953 } |
342 | 954 |
955 // let task 0 do this | |
956 if (task_num == 0) { | |
957 // task 0 is responsible for clearing the global data structures | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
958 // We should be here because of an overflow. During STW we should |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
959 // not clear the overflow flag since we rely on it being true when |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
960 // we exit this method to abort the pause and restart concurent |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
961 // marking. |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
962 clear_marking_state(concurrent() /* clear_overflow */); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
963 force_overflow()->update(); |
342 | 964 |
965 if (PrintGC) { | |
966 gclog_or_tty->date_stamp(PrintGCDateStamps); | |
967 gclog_or_tty->stamp(PrintGCTimeStamps); | |
968 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]"); | |
969 } | |
970 } | |
971 | |
972 // after this, each task should reset its own data structures then | |
973 // then go into the second barrier | |
974 } | |
975 | |
976 void ConcurrentMark::enter_second_sync_barrier(int task_num) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
977 if (verbose_low()) { |
342 | 978 gclog_or_tty->print_cr("[%d] entering second barrier", task_num); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
979 } |
342 | 980 |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
981 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
|
982 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
|
983 } |
342 | 984 _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
|
985 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
|
986 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
|
987 } |
342 | 988 // at this point everything should be re-initialised and ready to go |
989 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
990 if (verbose_low()) { |
342 | 991 gclog_or_tty->print_cr("[%d] leaving second barrier", task_num); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
992 } |
342 | 993 } |
994 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
995 #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
|
996 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
|
997 _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
|
998 _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
|
999 update(); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1000 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1001 |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1002 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
|
1003 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
|
1004 _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
|
1005 _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
|
1006 } else { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1007 _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
|
1008 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1009 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1010 |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1011 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
|
1012 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
|
1013 _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
|
1014 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
|
1015 } else { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1016 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
|
1017 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1018 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1019 #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
|
1020 |
342 | 1021 void ConcurrentMark::grayRoot(oop p) { |
1022 HeapWord* addr = (HeapWord*) p; | |
1023 // We can't really check against _heap_start and _heap_end, since it | |
1024 // is possible during an evacuation pause with piggy-backed | |
1025 // initial-mark that the committed space is expanded during the | |
1026 // pause without CM observing this change. So the assertions below | |
1027 // is a bit conservative; but better than nothing. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1028 assert(_g1h->g1_committed().contains(addr), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1029 "address should be within the heap bounds"); |
342 | 1030 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1031 if (!_nextMarkBitMap->isMarked(addr)) { |
342 | 1032 _nextMarkBitMap->parMark(addr); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1033 } |
342 | 1034 } |
1035 | |
1036 void ConcurrentMark::grayRegionIfNecessary(MemRegion mr) { | |
1037 // The objects on the region have already been marked "in bulk" by | |
1038 // the caller. We only need to decide whether to push the region on | |
1039 // the region stack or not. | |
1040 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1041 if (!concurrent_marking_in_progress() || !_should_gray_objects) { |
342 | 1042 // We're done with marking and waiting for remark. We do not need to |
1043 // push anything else on the region stack. | |
1044 return; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1045 } |
342 | 1046 |
1047 HeapWord* finger = _finger; | |
1048 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1049 if (verbose_low()) { |
342 | 1050 gclog_or_tty->print_cr("[global] attempting to push " |
1051 "region ["PTR_FORMAT", "PTR_FORMAT"), finger is at " | |
1052 PTR_FORMAT, mr.start(), mr.end(), finger); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1053 } |
342 | 1054 |
1055 if (mr.start() < finger) { | |
1056 // The finger is always heap region aligned and it is not possible | |
1057 // for mr to span heap regions. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1058 assert(mr.end() <= finger, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1059 |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1060 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1061 assert(mr.start() <= mr.end(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1062 "region boundaries should fall within the committed space"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1063 assert(_heap_start <= mr.start(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1064 "region boundaries should fall within the committed space"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1065 assert(mr.end() <= _heap_end, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1066 "region boundaries should fall within the committed space"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1067 if (verbose_low()) { |
342 | 1068 gclog_or_tty->print_cr("[global] region ["PTR_FORMAT", "PTR_FORMAT") " |
1069 "below the finger, pushing it", | |
1070 mr.start(), mr.end()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1071 } |
342 | 1072 |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
1073 if (!region_stack_push_lock_free(mr)) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1074 if (verbose_low()) { |
342 | 1075 gclog_or_tty->print_cr("[global] region stack has overflown."); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1076 } |
342 | 1077 } |
1078 } | |
1079 } | |
1080 | |
1081 void ConcurrentMark::markAndGrayObjectIfNecessary(oop p) { | |
1082 // The object is not marked by the caller. We need to at least mark | |
1083 // it and maybe push in on the stack. | |
1084 | |
1085 HeapWord* addr = (HeapWord*)p; | |
1086 if (!_nextMarkBitMap->isMarked(addr)) { | |
1087 // We definitely need to mark it, irrespective whether we bail out | |
1088 // because we're done with marking. | |
1089 if (_nextMarkBitMap->parMark(addr)) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1090 if (!concurrent_marking_in_progress() || !_should_gray_objects) { |
342 | 1091 // If we're done with concurrent marking and we're waiting for |
1092 // remark, then we're not pushing anything on the stack. | |
1093 return; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1094 } |
342 | 1095 |
1096 // No OrderAccess:store_load() is needed. It is implicit in the | |
1097 // CAS done in parMark(addr) above | |
1098 HeapWord* finger = _finger; | |
1099 | |
1100 if (addr < finger) { | |
1101 if (!mark_stack_push(oop(addr))) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1102 if (verbose_low()) { |
342 | 1103 gclog_or_tty->print_cr("[global] global stack overflow " |
1104 "during parMark"); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1105 } |
342 | 1106 } |
1107 } | |
1108 } | |
1109 } | |
1110 } | |
1111 | |
1112 class CMConcurrentMarkingTask: public AbstractGangTask { | |
1113 private: | |
1114 ConcurrentMark* _cm; | |
1115 ConcurrentMarkThread* _cmt; | |
1116 | |
1117 public: | |
1118 void work(int worker_i) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1119 assert(Thread::current()->is_ConcurrentGC_thread(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1120 "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
|
1121 ResourceMark rm; |
342 | 1122 |
1123 double start_vtime = os::elapsedVTime(); | |
1124 | |
1125 ConcurrentGCThread::stsJoin(); | |
1126 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1127 assert((size_t) worker_i < _cm->active_tasks(), "invariant"); |
342 | 1128 CMTask* the_task = _cm->task(worker_i); |
1129 the_task->record_start_time(); | |
1130 if (!_cm->has_aborted()) { | |
1131 do { | |
1132 double start_vtime_sec = os::elapsedVTime(); | |
1133 double start_time_sec = os::elapsedTime(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1134 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1135 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1136 the_task->do_marking_step(mark_step_duration_ms, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1137 true /* do_stealing */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1138 true /* do_termination */); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1139 |
342 | 1140 double end_time_sec = os::elapsedTime(); |
1141 double end_vtime_sec = os::elapsedVTime(); | |
1142 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec; | |
1143 double elapsed_time_sec = end_time_sec - start_time_sec; | |
1144 _cm->clear_has_overflown(); | |
1145 | |
1146 bool ret = _cm->do_yield_check(worker_i); | |
1147 | |
1148 jlong sleep_time_ms; | |
1149 if (!_cm->has_aborted() && the_task->has_aborted()) { | |
1150 sleep_time_ms = | |
1151 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0); | |
1152 ConcurrentGCThread::stsLeave(); | |
1153 os::sleep(Thread::current(), sleep_time_ms, false); | |
1154 ConcurrentGCThread::stsJoin(); | |
1155 } | |
1156 double end_time2_sec = os::elapsedTime(); | |
1157 double elapsed_time2_sec = end_time2_sec - start_time_sec; | |
1158 | |
1159 #if 0 | |
1160 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, " | |
1161 "overhead %1.4lf", | |
1162 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms, | |
1163 the_task->conc_overhead(os::elapsedTime()) * 8.0); | |
1164 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms", | |
1165 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0); | |
1166 #endif | |
1167 } while (!_cm->has_aborted() && the_task->has_aborted()); | |
1168 } | |
1169 the_task->record_end_time(); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1170 guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant"); |
342 | 1171 |
1172 ConcurrentGCThread::stsLeave(); | |
1173 | |
1174 double end_vtime = os::elapsedVTime(); | |
1175 _cm->update_accum_task_vtime(worker_i, end_vtime - start_vtime); | |
1176 } | |
1177 | |
1178 CMConcurrentMarkingTask(ConcurrentMark* cm, | |
1179 ConcurrentMarkThread* cmt) : | |
1180 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { } | |
1181 | |
1182 ~CMConcurrentMarkingTask() { } | |
1183 }; | |
1184 | |
1185 void ConcurrentMark::markFromRoots() { | |
1186 // we might be tempted to assert that: | |
1187 // assert(asynch == !SafepointSynchronize::is_at_safepoint(), | |
1188 // "inconsistent argument?"); | |
1189 // However that wouldn't be right, because it's possible that | |
1190 // a safepoint is indeed in progress as a younger generation | |
1191 // stop-the-world GC happens even as we mark in this generation. | |
1192 | |
1193 _restart_for_overflow = false; | |
1194 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1195 size_t active_workers = MAX2((size_t) 1, parallel_marking_threads()); |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1196 force_overflow_conc()->init(); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1197 set_phase(active_workers, true /* concurrent */); |
342 | 1198 |
1199 CMConcurrentMarkingTask markingTask(this, cmThread()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1200 if (parallel_marking_threads() > 0) { |
342 | 1201 _parallel_workers->run_task(&markingTask); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1202 } else { |
342 | 1203 markingTask.work(0); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1204 } |
342 | 1205 print_stats(); |
1206 } | |
1207 | |
1208 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) { | |
1209 // world is stopped at this checkpoint | |
1210 assert(SafepointSynchronize::is_at_safepoint(), | |
1211 "world should be stopped"); | |
1212 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
1213 | |
1214 // If a full collection has happened, we shouldn't do this. | |
1215 if (has_aborted()) { | |
1216 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
1217 return; | |
1218 } | |
1219 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1220 SvcGCMarker sgcm(SvcGCMarker::OTHER); |
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1221 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1222 if (VerifyDuringGC) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1223 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1224 gclog_or_tty->print(" VerifyDuringGC:(before)"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1225 Universe::heap()->prepare_for_verify(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1226 Universe::verify(/* allow dirty */ true, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1227 /* silent */ false, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1228 /* option */ VerifyOption_G1UsePrevMarking); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1229 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1230 |
342 | 1231 G1CollectorPolicy* g1p = g1h->g1_policy(); |
1232 g1p->record_concurrent_mark_remark_start(); | |
1233 | |
1234 double start = os::elapsedTime(); | |
1235 | |
1236 checkpointRootsFinalWork(); | |
1237 | |
1238 double mark_work_end = os::elapsedTime(); | |
1239 | |
1240 weakRefsWork(clear_all_soft_refs); | |
1241 | |
1242 if (has_overflown()) { | |
1243 // Oops. We overflowed. Restart concurrent marking. | |
1244 _restart_for_overflow = true; | |
1245 // Clear the flag. We do not need it any more. | |
1246 clear_has_overflown(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1247 if (G1TraceMarkStackOverflow) { |
342 | 1248 gclog_or_tty->print_cr("\nRemark led to restart for overflow."); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1249 } |
342 | 1250 } else { |
2149 | 1251 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
342 | 1252 // We're done with marking. |
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
1253 // 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
|
1254 // threads to have SATB queues with active set to true. |
2149 | 1255 satb_mq_set.set_active_all_threads(false, /* new active value */ |
1256 true /* expected_active */); | |
811 | 1257 |
1258 if (VerifyDuringGC) { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1259 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1260 gclog_or_tty->print(" VerifyDuringGC:(after)"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1261 Universe::heap()->prepare_for_verify(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1262 Universe::verify(/* allow dirty */ true, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1263 /* silent */ false, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1264 /* option */ VerifyOption_G1UseNextMarking); |
811 | 1265 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1266 assert(!restart_for_overflow(), "sanity"); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1267 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1268 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1269 // Reset the marking state if marking completed |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1270 if (!restart_for_overflow()) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1271 set_non_marking_state(); |
342 | 1272 } |
1273 | |
1274 #if VERIFY_OBJS_PROCESSED | |
1275 _scan_obj_cl.objs_processed = 0; | |
1276 ThreadLocalObjQueue::objs_enqueued = 0; | |
1277 #endif | |
1278 | |
1279 // Statistics | |
1280 double now = os::elapsedTime(); | |
1281 _remark_mark_times.add((mark_work_end - start) * 1000.0); | |
1282 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0); | |
1283 _remark_times.add((now - start) * 1000.0); | |
1284 | |
1285 g1p->record_concurrent_mark_remark_end(); | |
1286 } | |
1287 | |
1288 #define CARD_BM_TEST_MODE 0 | |
1289 | |
1290 class CalcLiveObjectsClosure: public HeapRegionClosure { | |
1291 | |
1292 CMBitMapRO* _bm; | |
1293 ConcurrentMark* _cm; | |
1294 bool _changed; | |
1295 bool _yield; | |
1296 size_t _words_done; | |
1297 size_t _tot_live; | |
1298 size_t _tot_used; | |
1299 size_t _regions_done; | |
1300 double _start_vtime_sec; | |
1301 | |
1302 BitMap* _region_bm; | |
1303 BitMap* _card_bm; | |
1304 intptr_t _bottom_card_num; | |
1305 bool _final; | |
1306 | |
1307 void mark_card_num_range(intptr_t start_card_num, intptr_t last_card_num) { | |
1308 for (intptr_t i = start_card_num; i <= last_card_num; i++) { | |
1309 #if CARD_BM_TEST_MODE | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1310 guarantee(_card_bm->at(i - _bottom_card_num), "Should already be set."); |
342 | 1311 #else |
1312 _card_bm->par_at_put(i - _bottom_card_num, 1); | |
1313 #endif | |
1314 } | |
1315 } | |
1316 | |
1317 public: | |
1318 CalcLiveObjectsClosure(bool final, | |
1319 CMBitMapRO *bm, ConcurrentMark *cm, | |
936 | 1320 BitMap* region_bm, BitMap* card_bm) : |
342 | 1321 _bm(bm), _cm(cm), _changed(false), _yield(true), |
1322 _words_done(0), _tot_live(0), _tot_used(0), | |
936 | 1323 _region_bm(region_bm), _card_bm(card_bm),_final(final), |
342 | 1324 _regions_done(0), _start_vtime_sec(0.0) |
1325 { | |
1326 _bottom_card_num = | |
1327 intptr_t(uintptr_t(G1CollectedHeap::heap()->reserved_region().start()) >> | |
1328 CardTableModRefBS::card_shift); | |
1329 } | |
1330 | |
829 | 1331 // It takes a region that's not empty (i.e., it has at least one |
1332 // live object in it and sets its corresponding bit on the region | |
1333 // bitmap to 1. If the region is "starts humongous" it will also set | |
1334 // to 1 the bits on the region bitmap that correspond to its | |
1335 // associated "continues humongous" regions. | |
1336 void set_bit_for_region(HeapRegion* hr) { | |
1337 assert(!hr->continuesHumongous(), "should have filtered those out"); | |
1338 | |
1339 size_t index = hr->hrs_index(); | |
1340 if (!hr->startsHumongous()) { | |
1341 // Normal (non-humongous) case: just set the bit. | |
1342 _region_bm->par_at_put((BitMap::idx_t) index, true); | |
1343 } else { | |
1344 // Starts humongous case: calculate how many regions are part of | |
1345 // this humongous region and then set the bit range. It might | |
1346 // have been a bit more efficient to look at the object that | |
1347 // spans these humongous regions to calculate their number from | |
1348 // the object's size. However, it's a good idea to calculate | |
1349 // this based on the metadata itself, and not the region | |
1350 // contents, so that this code is not aware of what goes into | |
1351 // the humongous regions (in case this changes in the future). | |
1352 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
1353 size_t end_index = index + 1; | |
831 | 1354 while (end_index < g1h->n_regions()) { |
1355 HeapRegion* chr = g1h->region_at(end_index); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1356 if (!chr->continuesHumongous()) break; |
829 | 1357 end_index += 1; |
1358 } | |
1359 _region_bm->par_at_put_range((BitMap::idx_t) index, | |
1360 (BitMap::idx_t) end_index, true); | |
1361 } | |
1362 } | |
1363 | |
342 | 1364 bool doHeapRegion(HeapRegion* hr) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1365 if (!_final && _regions_done == 0) { |
342 | 1366 _start_vtime_sec = os::elapsedVTime(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1367 } |
342 | 1368 |
639 | 1369 if (hr->continuesHumongous()) { |
829 | 1370 // We will ignore these here and process them when their |
1371 // associated "starts humongous" region is processed (see | |
1372 // set_bit_for_heap_region()). Note that we cannot rely on their | |
1373 // associated "starts humongous" region to have their bit set to | |
1374 // 1 since, due to the region chunking in the parallel region | |
1375 // iteration, a "continues humongous" region might be visited | |
1376 // before its associated "starts humongous". | |
639 | 1377 return false; |
1378 } | |
342 | 1379 |
1380 HeapWord* nextTop = hr->next_top_at_mark_start(); | |
1381 HeapWord* start = hr->top_at_conc_mark_count(); | |
1382 assert(hr->bottom() <= start && start <= hr->end() && | |
1383 hr->bottom() <= nextTop && nextTop <= hr->end() && | |
1384 start <= nextTop, | |
1385 "Preconditions."); | |
1386 // Otherwise, record the number of word's we'll examine. | |
1387 size_t words_done = (nextTop - start); | |
1388 // Find the first marked object at or after "start". | |
1389 start = _bm->getNextMarkedWordAddress(start, nextTop); | |
1390 size_t marked_bytes = 0; | |
1391 | |
1392 // Below, the term "card num" means the result of shifting an address | |
1393 // by the card shift -- address 0 corresponds to card number 0. One | |
1394 // must subtract the card num of the bottom of the heap to obtain a | |
1395 // card table index. | |
1396 // The first card num of the sequence of live cards currently being | |
1397 // constructed. -1 ==> no sequence. | |
1398 intptr_t start_card_num = -1; | |
1399 // The last card num of the sequence of live cards currently being | |
1400 // constructed. -1 ==> no sequence. | |
1401 intptr_t last_card_num = -1; | |
1402 | |
1403 while (start < nextTop) { | |
1404 if (_yield && _cm->do_yield_check()) { | |
1405 // We yielded. It might be for a full collection, in which case | |
1406 // all bets are off; terminate the traversal. | |
1407 if (_cm->has_aborted()) { | |
1408 _changed = false; | |
1409 return true; | |
1410 } else { | |
1411 // Otherwise, it might be a collection pause, and the region | |
1412 // we're looking at might be in the collection set. We'll | |
1413 // abandon this region. | |
1414 return false; | |
1415 } | |
1416 } | |
1417 oop obj = oop(start); | |
1418 int obj_sz = obj->size(); | |
1419 // The card num of the start of the current object. | |
1420 intptr_t obj_card_num = | |
1421 intptr_t(uintptr_t(start) >> CardTableModRefBS::card_shift); | |
1422 | |
1423 HeapWord* obj_last = start + obj_sz - 1; | |
1424 intptr_t obj_last_card_num = | |
1425 intptr_t(uintptr_t(obj_last) >> CardTableModRefBS::card_shift); | |
1426 | |
1427 if (obj_card_num != last_card_num) { | |
1428 if (start_card_num == -1) { | |
1429 assert(last_card_num == -1, "Both or neither."); | |
1430 start_card_num = obj_card_num; | |
1431 } else { | |
1432 assert(last_card_num != -1, "Both or neither."); | |
1433 assert(obj_card_num >= last_card_num, "Inv"); | |
1434 if ((obj_card_num - last_card_num) > 1) { | |
1435 // Mark the last run, and start a new one. | |
1436 mark_card_num_range(start_card_num, last_card_num); | |
1437 start_card_num = obj_card_num; | |
1438 } | |
1439 } | |
1440 #if CARD_BM_TEST_MODE | |
1441 /* | |
1442 gclog_or_tty->print_cr("Setting bits from %d/%d.", | |
1443 obj_card_num - _bottom_card_num, | |
1444 obj_last_card_num - _bottom_card_num); | |
1445 */ | |
1446 for (intptr_t j = obj_card_num; j <= obj_last_card_num; j++) { | |
1447 _card_bm->par_at_put(j - _bottom_card_num, 1); | |
1448 } | |
1449 #endif | |
1450 } | |
1451 // In any case, we set the last card num. | |
1452 last_card_num = obj_last_card_num; | |
1453 | |
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; |
342 | 1455 // Find the next marked object after this one. |
1456 start = _bm->getNextMarkedWordAddress(start + 1, nextTop); | |
1457 _changed = true; | |
1458 } | |
1459 // Handle the last range, if any. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1460 if (start_card_num != -1) { |
342 | 1461 mark_card_num_range(start_card_num, last_card_num); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1462 } |
342 | 1463 if (_final) { |
1464 // Mark the allocated-since-marking portion... | |
1465 HeapWord* tp = hr->top(); | |
1466 if (nextTop < tp) { | |
1467 start_card_num = | |
1468 intptr_t(uintptr_t(nextTop) >> CardTableModRefBS::card_shift); | |
1469 last_card_num = | |
1470 intptr_t(uintptr_t(tp) >> CardTableModRefBS::card_shift); | |
1471 mark_card_num_range(start_card_num, last_card_num); | |
1472 // This definitely means the region has live objects. | |
829 | 1473 set_bit_for_region(hr); |
342 | 1474 } |
1475 } | |
1476 | |
1477 hr->add_to_marked_bytes(marked_bytes); | |
1478 // Update the live region bitmap. | |
1479 if (marked_bytes > 0) { | |
829 | 1480 set_bit_for_region(hr); |
342 | 1481 } |
1482 hr->set_top_at_conc_mark_count(nextTop); | |
1483 _tot_live += hr->next_live_bytes(); | |
1484 _tot_used += hr->used(); | |
1485 _words_done = words_done; | |
1486 | |
1487 if (!_final) { | |
1488 ++_regions_done; | |
1489 if (_regions_done % 10 == 0) { | |
1490 double end_vtime_sec = os::elapsedVTime(); | |
1491 double elapsed_vtime_sec = end_vtime_sec - _start_vtime_sec; | |
1492 if (elapsed_vtime_sec > (10.0 / 1000.0)) { | |
1493 jlong sleep_time_ms = | |
1494 (jlong) (elapsed_vtime_sec * _cm->cleanup_sleep_factor() * 1000.0); | |
1495 os::sleep(Thread::current(), sleep_time_ms, false); | |
1496 _start_vtime_sec = end_vtime_sec; | |
1497 } | |
1498 } | |
1499 } | |
1500 | |
1501 return false; | |
1502 } | |
1503 | |
1504 bool changed() { return _changed; } | |
1505 void reset() { _changed = false; _words_done = 0; } | |
1506 void no_yield() { _yield = false; } | |
1507 size_t words_done() { return _words_done; } | |
1508 size_t tot_live() { return _tot_live; } | |
1509 size_t tot_used() { return _tot_used; } | |
1510 }; | |
1511 | |
1512 | |
1513 void ConcurrentMark::calcDesiredRegions() { | |
1514 _region_bm.clear(); | |
1515 _card_bm.clear(); | |
1516 CalcLiveObjectsClosure calccl(false /*final*/, | |
1517 nextMarkBitMap(), this, | |
936 | 1518 &_region_bm, &_card_bm); |
342 | 1519 G1CollectedHeap *g1h = G1CollectedHeap::heap(); |
1520 g1h->heap_region_iterate(&calccl); | |
1521 | |
1522 do { | |
1523 calccl.reset(); | |
1524 g1h->heap_region_iterate(&calccl); | |
1525 } while (calccl.changed()); | |
1526 } | |
1527 | |
1528 class G1ParFinalCountTask: public AbstractGangTask { | |
1529 protected: | |
1530 G1CollectedHeap* _g1h; | |
1531 CMBitMap* _bm; | |
1532 size_t _n_workers; | |
1533 size_t *_live_bytes; | |
1534 size_t *_used_bytes; | |
1535 BitMap* _region_bm; | |
1536 BitMap* _card_bm; | |
1537 public: | |
1538 G1ParFinalCountTask(G1CollectedHeap* g1h, CMBitMap* bm, | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1539 BitMap* region_bm, BitMap* card_bm) |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1540 : AbstractGangTask("G1 final counting"), _g1h(g1h), |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1541 _bm(bm), _region_bm(region_bm), _card_bm(card_bm) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1542 if (ParallelGCThreads > 0) { |
342 | 1543 _n_workers = _g1h->workers()->total_workers(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1544 } else { |
342 | 1545 _n_workers = 1; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1546 } |
342 | 1547 _live_bytes = NEW_C_HEAP_ARRAY(size_t, _n_workers); |
1548 _used_bytes = NEW_C_HEAP_ARRAY(size_t, _n_workers); | |
1549 } | |
1550 | |
1551 ~G1ParFinalCountTask() { | |
1552 FREE_C_HEAP_ARRAY(size_t, _live_bytes); | |
1553 FREE_C_HEAP_ARRAY(size_t, _used_bytes); | |
1554 } | |
1555 | |
1556 void work(int i) { | |
1557 CalcLiveObjectsClosure calccl(true /*final*/, | |
1558 _bm, _g1h->concurrent_mark(), | |
936 | 1559 _region_bm, _card_bm); |
342 | 1560 calccl.no_yield(); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1561 if (G1CollectedHeap::use_parallel_gc_threads()) { |
355 | 1562 _g1h->heap_region_par_iterate_chunked(&calccl, i, |
1563 HeapRegion::FinalCountClaimValue); | |
342 | 1564 } else { |
1565 _g1h->heap_region_iterate(&calccl); | |
1566 } | |
1567 assert(calccl.complete(), "Shouldn't have yielded!"); | |
1568 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
1569 assert((size_t) i < _n_workers, "invariant"); |
342 | 1570 _live_bytes[i] = calccl.tot_live(); |
1571 _used_bytes[i] = calccl.tot_used(); | |
1572 } | |
1573 size_t live_bytes() { | |
1574 size_t live_bytes = 0; | |
1575 for (size_t i = 0; i < _n_workers; ++i) | |
1576 live_bytes += _live_bytes[i]; | |
1577 return live_bytes; | |
1578 } | |
1579 size_t used_bytes() { | |
1580 size_t used_bytes = 0; | |
1581 for (size_t i = 0; i < _n_workers; ++i) | |
1582 used_bytes += _used_bytes[i]; | |
1583 return used_bytes; | |
1584 } | |
1585 }; | |
1586 | |
1587 class G1ParNoteEndTask; | |
1588 | |
1589 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure { | |
1590 G1CollectedHeap* _g1; | |
1591 int _worker_num; | |
1592 size_t _max_live_bytes; | |
1593 size_t _regions_claimed; | |
1594 size_t _freed_bytes; | |
2173 | 1595 FreeRegionList* _local_cleanup_list; |
1596 HumongousRegionSet* _humongous_proxy_set; | |
1597 HRRSCleanupTask* _hrrs_cleanup_task; | |
342 | 1598 double _claimed_region_time; |
1599 double _max_region_time; | |
1600 | |
1601 public: | |
1602 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1, | |
2173 | 1603 int worker_num, |
1604 FreeRegionList* local_cleanup_list, | |
1605 HumongousRegionSet* humongous_proxy_set, | |
1606 HRRSCleanupTask* hrrs_cleanup_task); | |
342 | 1607 size_t freed_bytes() { return _freed_bytes; } |
1608 | |
1609 bool doHeapRegion(HeapRegion *r); | |
1610 | |
1611 size_t max_live_bytes() { return _max_live_bytes; } | |
1612 size_t regions_claimed() { return _regions_claimed; } | |
1613 double claimed_region_time_sec() { return _claimed_region_time; } | |
1614 double max_region_time_sec() { return _max_region_time; } | |
1615 }; | |
1616 | |
1617 class G1ParNoteEndTask: public AbstractGangTask { | |
1618 friend class G1NoteEndOfConcMarkClosure; | |
2152 | 1619 |
342 | 1620 protected: |
1621 G1CollectedHeap* _g1h; | |
1622 size_t _max_live_bytes; | |
1623 size_t _freed_bytes; | |
2152 | 1624 FreeRegionList* _cleanup_list; |
1625 | |
342 | 1626 public: |
1627 G1ParNoteEndTask(G1CollectedHeap* g1h, | |
2152 | 1628 FreeRegionList* cleanup_list) : |
342 | 1629 AbstractGangTask("G1 note end"), _g1h(g1h), |
2152 | 1630 _max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { } |
342 | 1631 |
1632 void work(int i) { | |
1633 double start = os::elapsedTime(); | |
2173 | 1634 FreeRegionList local_cleanup_list("Local Cleanup List"); |
1635 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set"); | |
1636 HRRSCleanupTask hrrs_cleanup_task; | |
1637 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, i, &local_cleanup_list, | |
1638 &humongous_proxy_set, | |
1639 &hrrs_cleanup_task); | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1640 if (G1CollectedHeap::use_parallel_gc_threads()) { |
355 | 1641 _g1h->heap_region_par_iterate_chunked(&g1_note_end, i, |
1642 HeapRegion::NoteEndClaimValue); | |
342 | 1643 } else { |
1644 _g1h->heap_region_iterate(&g1_note_end); | |
1645 } | |
1646 assert(g1_note_end.complete(), "Shouldn't have yielded!"); | |
1647 | |
2152 | 1648 // Now update the lists |
1649 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(), | |
1650 NULL /* free_list */, | |
2173 | 1651 &humongous_proxy_set, |
2152 | 1652 true /* par */); |
342 | 1653 { |
1654 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
1655 _max_live_bytes += g1_note_end.max_live_bytes(); | |
1656 _freed_bytes += g1_note_end.freed_bytes(); | |
2152 | 1657 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1658 // 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
|
1659 // 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
|
1660 // generate output for the newly-reclaimed regions (the list |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1661 // 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
|
1662 // 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
|
1663 // 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
|
1664 // cleanup list. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1665 |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1666 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1667 if (hr_printer->is_active()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1668 HeapRegionLinkedListIterator iter(&local_cleanup_list); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1669 while (iter.more_available()) { |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1670 HeapRegion* hr = iter.get_next(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1671 hr_printer->cleanup(hr); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1672 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1673 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1674 |
2173 | 1675 _cleanup_list->add_as_tail(&local_cleanup_list); |
1676 assert(local_cleanup_list.is_empty(), "post-condition"); | |
1677 | |
1678 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task); | |
342 | 1679 } |
1680 double end = os::elapsedTime(); | |
1681 if (G1PrintParCleanupStats) { | |
1682 gclog_or_tty->print(" Worker thread %d [%8.3f..%8.3f = %8.3f ms] " | |
1683 "claimed %d regions (tot = %8.3f ms, max = %8.3f ms).\n", | |
1684 i, start, end, (end-start)*1000.0, | |
1685 g1_note_end.regions_claimed(), | |
1686 g1_note_end.claimed_region_time_sec()*1000.0, | |
1687 g1_note_end.max_region_time_sec()*1000.0); | |
1688 } | |
1689 } | |
1690 size_t max_live_bytes() { return _max_live_bytes; } | |
1691 size_t freed_bytes() { return _freed_bytes; } | |
1692 }; | |
1693 | |
1694 class G1ParScrubRemSetTask: public AbstractGangTask { | |
1695 protected: | |
1696 G1RemSet* _g1rs; | |
1697 BitMap* _region_bm; | |
1698 BitMap* _card_bm; | |
1699 public: | |
1700 G1ParScrubRemSetTask(G1CollectedHeap* g1h, | |
1701 BitMap* region_bm, BitMap* card_bm) : | |
1702 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()), | |
1703 _region_bm(region_bm), _card_bm(card_bm) | |
1704 {} | |
1705 | |
1706 void work(int i) { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1707 if (G1CollectedHeap::use_parallel_gc_threads()) { |
355 | 1708 _g1rs->scrub_par(_region_bm, _card_bm, i, |
1709 HeapRegion::ScrubRemSetClaimValue); | |
342 | 1710 } else { |
1711 _g1rs->scrub(_region_bm, _card_bm); | |
1712 } | |
1713 } | |
1714 | |
1715 }; | |
1716 | |
1717 G1NoteEndOfConcMarkClosure:: | |
1718 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1, | |
2173 | 1719 int worker_num, |
1720 FreeRegionList* local_cleanup_list, | |
1721 HumongousRegionSet* humongous_proxy_set, | |
1722 HRRSCleanupTask* hrrs_cleanup_task) | |
342 | 1723 : _g1(g1), _worker_num(worker_num), |
1724 _max_live_bytes(0), _regions_claimed(0), | |
2152 | 1725 _freed_bytes(0), |
342 | 1726 _claimed_region_time(0.0), _max_region_time(0.0), |
2173 | 1727 _local_cleanup_list(local_cleanup_list), |
1728 _humongous_proxy_set(humongous_proxy_set), | |
1729 _hrrs_cleanup_task(hrrs_cleanup_task) { } | |
2152 | 1730 |
1731 bool G1NoteEndOfConcMarkClosure::doHeapRegion(HeapRegion *hr) { | |
342 | 1732 // We use a claim value of zero here because all regions |
1733 // were claimed with value 1 in the FinalCount task. | |
2152 | 1734 hr->reset_gc_time_stamp(); |
1735 if (!hr->continuesHumongous()) { | |
342 | 1736 double start = os::elapsedTime(); |
1737 _regions_claimed++; | |
2152 | 1738 hr->note_end_of_marking(); |
1739 _max_live_bytes += hr->max_live_bytes(); | |
2173 | 1740 _g1->free_region_if_empty(hr, |
1741 &_freed_bytes, | |
1742 _local_cleanup_list, | |
1743 _humongous_proxy_set, | |
1744 _hrrs_cleanup_task, | |
1745 true /* par */); | |
342 | 1746 double region_time = (os::elapsedTime() - start); |
1747 _claimed_region_time += region_time; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1748 if (region_time > _max_region_time) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1749 _max_region_time = region_time; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1750 } |
342 | 1751 } |
1752 return false; | |
1753 } | |
1754 | |
1755 void ConcurrentMark::cleanup() { | |
1756 // world is stopped at this checkpoint | |
1757 assert(SafepointSynchronize::is_at_safepoint(), | |
1758 "world should be stopped"); | |
1759 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
1760 | |
1761 // If a full collection has happened, we shouldn't do this. | |
1762 if (has_aborted()) { | |
1763 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
1764 return; | |
1765 } | |
1766 | |
2152 | 1767 g1h->verify_region_sets_optional(); |
1768 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1769 if (VerifyDuringGC) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1770 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1771 gclog_or_tty->print(" VerifyDuringGC:(before)"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1772 Universe::heap()->prepare_for_verify(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1773 Universe::verify(/* allow dirty */ true, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1774 /* silent */ false, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1775 /* option */ VerifyOption_G1UsePrevMarking); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1776 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1777 |
342 | 1778 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy(); |
1779 g1p->record_concurrent_mark_cleanup_start(); | |
1780 | |
1781 double start = os::elapsedTime(); | |
1782 | |
2173 | 1783 HeapRegionRemSet::reset_for_cleanup_tasks(); |
1784 | |
342 | 1785 // Do counting once more with the world stopped for good measure. |
1786 G1ParFinalCountTask g1_par_count_task(g1h, nextMarkBitMap(), | |
1787 &_region_bm, &_card_bm); | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1788 if (G1CollectedHeap::use_parallel_gc_threads()) { |
355 | 1789 assert(g1h->check_heap_region_claim_values( |
1790 HeapRegion::InitialClaimValue), | |
1791 "sanity check"); | |
1792 | |
342 | 1793 int n_workers = g1h->workers()->total_workers(); |
1794 g1h->set_par_threads(n_workers); | |
1795 g1h->workers()->run_task(&g1_par_count_task); | |
1796 g1h->set_par_threads(0); | |
355 | 1797 |
1798 assert(g1h->check_heap_region_claim_values( | |
1799 HeapRegion::FinalCountClaimValue), | |
1800 "sanity check"); | |
342 | 1801 } else { |
1802 g1_par_count_task.work(0); | |
1803 } | |
1804 | |
1805 size_t known_garbage_bytes = | |
1806 g1_par_count_task.used_bytes() - g1_par_count_task.live_bytes(); | |
1807 #if 0 | |
1808 gclog_or_tty->print_cr("used %1.2lf, live %1.2lf, garbage %1.2lf", | |
1809 (double) g1_par_count_task.used_bytes() / (double) (1024 * 1024), | |
1810 (double) g1_par_count_task.live_bytes() / (double) (1024 * 1024), | |
1811 (double) known_garbage_bytes / (double) (1024 * 1024)); | |
1812 #endif // 0 | |
1813 g1p->set_known_garbage_bytes(known_garbage_bytes); | |
1814 | |
1815 size_t start_used_bytes = g1h->used(); | |
1816 _at_least_one_mark_complete = true; | |
1817 g1h->set_marking_complete(); | |
1818 | |
1819 double count_end = os::elapsedTime(); | |
1820 double this_final_counting_time = (count_end - start); | |
1821 if (G1PrintParCleanupStats) { | |
1822 gclog_or_tty->print_cr("Cleanup:"); | |
1823 gclog_or_tty->print_cr(" Finalize counting: %8.3f ms", | |
1824 this_final_counting_time*1000.0); | |
1825 } | |
1826 _total_counting_time += this_final_counting_time; | |
1827 | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1828 if (G1PrintRegionLivenessInfo) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1829 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
|
1830 _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
|
1831 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1832 |
342 | 1833 // Install newly created mark bitMap as "prev". |
1834 swapMarkBitMaps(); | |
1835 | |
1836 g1h->reset_gc_time_stamp(); | |
1837 | |
1838 // Note end of marking in all heap regions. | |
1839 double note_end_start = os::elapsedTime(); | |
2152 | 1840 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list); |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1841 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 1842 int n_workers = g1h->workers()->total_workers(); |
1843 g1h->set_par_threads(n_workers); | |
1844 g1h->workers()->run_task(&g1_par_note_end_task); | |
1845 g1h->set_par_threads(0); | |
355 | 1846 |
1847 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue), | |
1848 "sanity check"); | |
342 | 1849 } else { |
1850 g1_par_note_end_task.work(0); | |
1851 } | |
2152 | 1852 |
1853 if (!cleanup_list_is_empty()) { | |
1854 // The cleanup list is not empty, so we'll have to process it | |
1855 // concurrently. Notify anyone else that might be wanting free | |
1856 // regions that there will be more free regions coming soon. | |
1857 g1h->set_free_regions_coming(); | |
1858 } | |
342 | 1859 double note_end_end = os::elapsedTime(); |
1860 if (G1PrintParCleanupStats) { | |
1861 gclog_or_tty->print_cr(" note end of marking: %8.3f ms.", | |
1862 (note_end_end - note_end_start)*1000.0); | |
1863 } | |
1864 | |
355 | 1865 |
342 | 1866 // call below, since it affects the metric by which we sort the heap |
1867 // regions. | |
1868 if (G1ScrubRemSets) { | |
1869 double rs_scrub_start = os::elapsedTime(); | |
1870 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
|
1871 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 1872 int n_workers = g1h->workers()->total_workers(); |
1873 g1h->set_par_threads(n_workers); | |
1874 g1h->workers()->run_task(&g1_par_scrub_rs_task); | |
1875 g1h->set_par_threads(0); | |
355 | 1876 |
1877 assert(g1h->check_heap_region_claim_values( | |
1878 HeapRegion::ScrubRemSetClaimValue), | |
1879 "sanity check"); | |
342 | 1880 } else { |
1881 g1_par_scrub_rs_task.work(0); | |
1882 } | |
1883 | |
1884 double rs_scrub_end = os::elapsedTime(); | |
1885 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start); | |
1886 _total_rs_scrub_time += this_rs_scrub_time; | |
1887 } | |
1888 | |
1889 // this will also free any regions totally full of garbage objects, | |
1890 // and sort the regions. | |
1891 g1h->g1_policy()->record_concurrent_mark_cleanup_end( | |
1892 g1_par_note_end_task.freed_bytes(), | |
1893 g1_par_note_end_task.max_live_bytes()); | |
1894 | |
1895 // Statistics. | |
1896 double end = os::elapsedTime(); | |
1897 _cleanup_times.add((end - start) * 1000.0); | |
1898 | |
1899 // G1CollectedHeap::heap()->print(); | |
1900 // gclog_or_tty->print_cr("HEAP GC TIME STAMP : %d", | |
1901 // G1CollectedHeap::heap()->get_gc_time_stamp()); | |
1902 | |
1903 if (PrintGC || PrintGCDetails) { | |
1904 g1h->print_size_transition(gclog_or_tty, | |
1905 start_used_bytes, | |
1906 g1h->used(), | |
1907 g1h->capacity()); | |
1908 } | |
1909 | |
1910 size_t cleaned_up_bytes = start_used_bytes - g1h->used(); | |
1911 g1p->decrease_known_garbage_bytes(cleaned_up_bytes); | |
1912 | |
1913 // We need to make this be a "collection" so any collection pause that | |
1914 // races with it goes around and waits for completeCleanup to finish. | |
1915 g1h->increment_total_collections(); | |
1916 | |
751 | 1917 if (VerifyDuringGC) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1918 HandleMark hm; // handle scope |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1919 gclog_or_tty->print(" VerifyDuringGC:(after)"); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1920 Universe::heap()->prepare_for_verify(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1921 Universe::verify(/* allow dirty */ true, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1922 /* silent */ false, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1923 /* option */ VerifyOption_G1UsePrevMarking); |
342 | 1924 } |
2152 | 1925 |
1926 g1h->verify_region_sets_optional(); | |
342 | 1927 } |
1928 | |
1929 void ConcurrentMark::completeCleanup() { | |
1930 if (has_aborted()) return; | |
1931 | |
2152 | 1932 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
1933 | |
1934 _cleanup_list.verify_optional(); | |
2361 | 1935 FreeRegionList tmp_free_list("Tmp Free List"); |
2152 | 1936 |
1937 if (G1ConcRegionFreeingVerbose) { | |
1938 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
1939 "cleanup list has "SIZE_FORMAT" entries", | |
1940 _cleanup_list.length()); | |
1941 } | |
1942 | |
1943 // Noone else should be accessing the _cleanup_list at this point, | |
1944 // so it's not necessary to take any locks | |
1945 while (!_cleanup_list.is_empty()) { | |
1946 HeapRegion* hr = _cleanup_list.remove_head(); | |
1947 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
|
1948 hr->par_clear(); |
2361 | 1949 tmp_free_list.add_as_tail(hr); |
2152 | 1950 |
1951 // Instead of adding one region at a time to the secondary_free_list, | |
1952 // we accumulate them in the local list and move them a few at a | |
1953 // time. This also cuts down on the number of notify_all() calls | |
1954 // we do during this process. We'll also append the local list when | |
1955 // _cleanup_list is empty (which means we just removed the last | |
1956 // region from the _cleanup_list). | |
2361 | 1957 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) || |
2152 | 1958 _cleanup_list.is_empty()) { |
1959 if (G1ConcRegionFreeingVerbose) { | |
1960 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
1961 "appending "SIZE_FORMAT" entries to the " | |
1962 "secondary_free_list, clean list still has " | |
1963 SIZE_FORMAT" entries", | |
2361 | 1964 tmp_free_list.length(), |
2152 | 1965 _cleanup_list.length()); |
342 | 1966 } |
2152 | 1967 |
1968 { | |
1969 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
2361 | 1970 g1h->secondary_free_list_add_as_tail(&tmp_free_list); |
2152 | 1971 SecondaryFreeList_lock->notify_all(); |
1972 } | |
1973 | |
1974 if (G1StressConcRegionFreeing) { | |
1975 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) { | |
1976 os::sleep(Thread::current(), (jlong) 1, false); | |
1977 } | |
1978 } | |
342 | 1979 } |
1980 } | |
2361 | 1981 assert(tmp_free_list.is_empty(), "post-condition"); |
342 | 1982 } |
1983 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1984 // Support closures for reference procssing in G1 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1985 |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
1986 bool G1CMIsAliveClosure::do_object_b(oop obj) { |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
1987 HeapWord* addr = (HeapWord*)obj; |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
1988 return addr != NULL && |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
1989 (!_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
|
1990 } |
342 | 1991 |
1992 class G1CMKeepAliveClosure: public OopClosure { | |
1993 G1CollectedHeap* _g1; | |
1994 ConcurrentMark* _cm; | |
1995 CMBitMap* _bitMap; | |
1996 public: | |
1997 G1CMKeepAliveClosure(G1CollectedHeap* g1, ConcurrentMark* cm, | |
1998 CMBitMap* bitMap) : | |
1999 _g1(g1), _cm(cm), | |
2000 _bitMap(bitMap) {} | |
2001 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2002 virtual 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
|
2003 virtual 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
|
2004 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2005 template <class T> void do_oop_work(T* p) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2006 oop obj = oopDesc::load_decode_heap_oop(p); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2007 HeapWord* addr = (HeapWord*)obj; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2008 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2009 if (_cm->verbose_high()) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2010 gclog_or_tty->print_cr("\t[0] we're looking at location " |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2011 "*"PTR_FORMAT" = "PTR_FORMAT, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2012 p, (void*) obj); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2013 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2014 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2015 if (_g1->is_in_g1_reserved(addr) && _g1->is_obj_ill(obj)) { |
342 | 2016 _bitMap->mark(addr); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2017 _cm->mark_stack_push(obj); |
342 | 2018 } |
2019 } | |
2020 }; | |
2021 | |
2022 class G1CMDrainMarkingStackClosure: public VoidClosure { | |
2023 CMMarkStack* _markStack; | |
2024 CMBitMap* _bitMap; | |
2025 G1CMKeepAliveClosure* _oopClosure; | |
2026 public: | |
2027 G1CMDrainMarkingStackClosure(CMBitMap* bitMap, CMMarkStack* markStack, | |
2028 G1CMKeepAliveClosure* oopClosure) : | |
2029 _bitMap(bitMap), | |
2030 _markStack(markStack), | |
2031 _oopClosure(oopClosure) | |
2032 {} | |
2033 | |
2034 void do_void() { | |
2035 _markStack->drain((OopClosure*)_oopClosure, _bitMap, false); | |
2036 } | |
2037 }; | |
2038 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2039 // 'Keep Alive' closure used by parallel reference processing. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2040 // An instance of this closure is used in the parallel reference processing |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2041 // code rather than an instance of G1CMKeepAliveClosure. We could have used |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2042 // the G1CMKeepAliveClosure as it is MT-safe. Also reference objects are |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2043 // placed on to discovered ref lists once so we can mark and push with no |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2044 // need to check whether the object has already been marked. Using the |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2045 // G1CMKeepAliveClosure would mean, however, having all the worker threads |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2046 // operating on the global mark stack. This means that an individual |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2047 // worker would be doing lock-free pushes while it processes its own |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2048 // discovered ref list followed by drain call. If the discovered ref lists |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2049 // are unbalanced then this could cause interference with the other |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2050 // workers. Using a CMTask (and its embedded local data structures) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2051 // avoids that potential interference. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2052 class G1CMParKeepAliveAndDrainClosure: public OopClosure { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2053 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2054 CMTask* _task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2055 CMBitMap* _bitMap; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2056 int _ref_counter_limit; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2057 int _ref_counter; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2058 public: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2059 G1CMParKeepAliveAndDrainClosure(ConcurrentMark* cm, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2060 CMTask* task, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2061 CMBitMap* bitMap) : |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2062 _cm(cm), _task(task), _bitMap(bitMap), |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2063 _ref_counter_limit(G1RefProcDrainInterval) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2064 { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2065 assert(_ref_counter_limit > 0, "sanity"); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2066 _ref_counter = _ref_counter_limit; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2067 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2068 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2069 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2070 virtual void do_oop( oop* p) { do_oop_work(p); } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2071 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2072 template <class T> void do_oop_work(T* p) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2073 if (!_cm->has_overflown()) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2074 oop obj = oopDesc::load_decode_heap_oop(p); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2075 if (_cm->verbose_high()) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2076 gclog_or_tty->print_cr("\t[%d] we're looking at location " |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2077 "*"PTR_FORMAT" = "PTR_FORMAT, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2078 _task->task_id(), p, (void*) obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2079 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2080 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2081 _task->deal_with_reference(obj); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2082 _ref_counter--; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2083 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2084 if (_ref_counter == 0) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2085 // We have dealt with _ref_counter_limit references, pushing them and objects |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2086 // reachable from them on to the local stack (and possibly the global stack). |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2087 // Call do_marking_step() to process these entries. We call the routine in a |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2088 // loop, which we'll exit if there's nothing more to do (i.e. we're done |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2089 // with the entries that we've pushed as a result of the deal_with_reference |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2090 // calls above) or we overflow. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2091 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2092 // while there may still be some work to do. (See the comment at the |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2093 // beginning of CMTask::do_marking_step() for those conditions - one of which |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2094 // is reaching the specified time target.) It is only when |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2095 // CMTask::do_marking_step() returns without setting the has_aborted() flag |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2096 // that the marking has completed. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2097 do { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2098 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2099 _task->do_marking_step(mark_step_duration_ms, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2100 false /* do_stealing */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2101 false /* do_termination */); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2102 } while (_task->has_aborted() && !_cm->has_overflown()); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2103 _ref_counter = _ref_counter_limit; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2104 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2105 } else { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2106 if (_cm->verbose_high()) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2107 gclog_or_tty->print_cr("\t[%d] CM Overflow", _task->task_id()); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2108 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2109 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2110 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2111 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2112 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2113 class G1CMParDrainMarkingStackClosure: public VoidClosure { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2114 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2115 CMTask* _task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2116 public: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2117 G1CMParDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task) : |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2118 _cm(cm), _task(task) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2119 {} |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2120 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2121 void do_void() { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2122 do { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2123 if (_cm->verbose_high()) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2124 gclog_or_tty->print_cr("\t[%d] Drain: Calling do marking_step", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2125 _task->task_id()); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2126 } |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2127 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2128 // We call CMTask::do_marking_step() to completely drain the local and |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2129 // global marking stacks. The routine is called in a loop, which we'll |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2130 // exit if there's nothing more to do (i.e. we'completely drained the |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2131 // entries that were pushed as a result of applying the |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2132 // G1CMParKeepAliveAndDrainClosure to the entries on the discovered ref |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2133 // lists above) or we overflow the global marking stack. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2134 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2135 // while there may still be some work to do. (See the comment at the |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2136 // beginning of CMTask::do_marking_step() for those conditions - one of which |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2137 // is reaching the specified time target.) It is only when |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2138 // CMTask::do_marking_step() returns without setting the has_aborted() flag |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2139 // that the marking has completed. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2140 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2141 _task->do_marking_step(1000000000.0 /* something very large */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2142 true /* do_stealing */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2143 true /* do_termination */); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2144 } while (_task->has_aborted() && !_cm->has_overflown()); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2145 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2146 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2147 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2148 // Implementation of AbstractRefProcTaskExecutor for G1 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2149 class G1RefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2150 private: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2151 G1CollectedHeap* _g1h; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2152 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2153 CMBitMap* _bitmap; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2154 WorkGang* _workers; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2155 int _active_workers; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2156 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2157 public: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2158 G1RefProcTaskExecutor(G1CollectedHeap* g1h, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2159 ConcurrentMark* cm, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2160 CMBitMap* bitmap, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2161 WorkGang* workers, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2162 int n_workers) : |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2163 _g1h(g1h), _cm(cm), _bitmap(bitmap), |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2164 _workers(workers), _active_workers(n_workers) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2165 { } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2166 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2167 // Executes the given task using concurrent marking worker threads. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2168 virtual void execute(ProcessTask& task); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2169 virtual void execute(EnqueueTask& task); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2170 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2171 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2172 class G1RefProcTaskProxy: public AbstractGangTask { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2173 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2174 ProcessTask& _proc_task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2175 G1CollectedHeap* _g1h; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2176 ConcurrentMark* _cm; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2177 CMBitMap* _bitmap; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2178 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2179 public: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2180 G1RefProcTaskProxy(ProcessTask& proc_task, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2181 G1CollectedHeap* g1h, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2182 ConcurrentMark* cm, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2183 CMBitMap* bitmap) : |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2184 AbstractGangTask("Process reference objects in parallel"), |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2185 _proc_task(proc_task), _g1h(g1h), _cm(cm), _bitmap(bitmap) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2186 {} |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2187 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2188 virtual void work(int i) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2189 CMTask* marking_task = _cm->task(i); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2190 G1CMIsAliveClosure g1_is_alive(_g1h); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2191 G1CMParKeepAliveAndDrainClosure g1_par_keep_alive(_cm, marking_task, _bitmap); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2192 G1CMParDrainMarkingStackClosure g1_par_drain(_cm, marking_task); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2193 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2194 _proc_task.work(i, g1_is_alive, g1_par_keep_alive, g1_par_drain); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2195 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2196 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2197 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2198 void G1RefProcTaskExecutor::execute(ProcessTask& proc_task) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2199 assert(_workers != NULL, "Need parallel worker threads."); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2200 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2201 G1RefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm, _bitmap); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2202 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2203 // We need to reset the phase for each task execution so that |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2204 // the termination protocol of CMTask::do_marking_step works. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2205 _cm->set_phase(_active_workers, false /* concurrent */); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2206 _g1h->set_par_threads(_active_workers); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2207 _workers->run_task(&proc_task_proxy); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2208 _g1h->set_par_threads(0); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2209 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2210 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2211 class G1RefEnqueueTaskProxy: public AbstractGangTask { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2212 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2213 EnqueueTask& _enq_task; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2214 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2215 public: |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2216 G1RefEnqueueTaskProxy(EnqueueTask& enq_task) : |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2217 AbstractGangTask("Enqueue reference objects in parallel"), |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2218 _enq_task(enq_task) |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2219 { } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2220 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2221 virtual void work(int i) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2222 _enq_task.work(i); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2223 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2224 }; |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2225 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2226 void G1RefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2227 assert(_workers != NULL, "Need parallel worker threads."); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2228 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2229 G1RefEnqueueTaskProxy enq_task_proxy(enq_task); |
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 _g1h->set_par_threads(_active_workers); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2232 _workers->run_task(&enq_task_proxy); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2233 _g1h->set_par_threads(0); |
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 |
342 | 2236 void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) { |
2237 ResourceMark rm; | |
2238 HandleMark hm; | |
453
c96030fff130
6684579: SoftReference processing can be made more efficient
ysr
parents:
355
diff
changeset
|
2239 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
c96030fff130
6684579: SoftReference processing can be made more efficient
ysr
parents:
355
diff
changeset
|
2240 ReferenceProcessor* rp = g1h->ref_processor(); |
342 | 2241 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1972
diff
changeset
|
2242 // See the comment in G1CollectedHeap::ref_processing_init() |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1972
diff
changeset
|
2243 // about how reference processing currently works in G1. |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1972
diff
changeset
|
2244 |
342 | 2245 // Process weak references. |
457
27a80744a83b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
453
diff
changeset
|
2246 rp->setup_policy(clear_all_soft_refs); |
342 | 2247 assert(_markStack.isEmpty(), "mark stack should be empty"); |
2248 | |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2249 G1CMIsAliveClosure g1_is_alive(g1h); |
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2250 G1CMKeepAliveClosure g1_keep_alive(g1h, this, nextMarkBitMap()); |
342 | 2251 G1CMDrainMarkingStackClosure |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2252 g1_drain_mark_stack(nextMarkBitMap(), &_markStack, &g1_keep_alive); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2253 // We use the work gang from the G1CollectedHeap and we utilize all |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2254 // the worker threads. |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2255 int active_workers = g1h->workers() ? g1h->workers()->total_workers() : 1; |
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2256 active_workers = MAX2(MIN2(active_workers, (int)_max_task_num), 1); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2257 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2258 G1RefProcTaskExecutor par_task_executor(g1h, this, nextMarkBitMap(), |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2259 g1h->workers(), active_workers); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2260 |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2261 |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2262 if (rp->processing_is_mt()) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2263 // Set the degree of MT here. If the discovery is done MT, there |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2264 // may have been a different number of threads doing the discovery |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2265 // and a different number of discovered lists may have Ref objects. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2266 // That is OK as long as the Reference lists are balanced (see |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2267 // balance_all_queues() and balance_queues()). |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2268 rp->set_active_mt_degree(active_workers); |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2269 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2270 rp->process_discovered_references(&g1_is_alive, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2271 &g1_keep_alive, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2272 &g1_drain_mark_stack, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2273 &par_task_executor); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2274 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2275 // The work routines of the parallel keep_alive and drain_marking_stack |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2276 // will set the has_overflown flag if we overflow the global marking |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2277 // stack. |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2278 } else { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2279 rp->process_discovered_references(&g1_is_alive, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2280 &g1_keep_alive, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2281 &g1_drain_mark_stack, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2282 NULL); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2283 |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2284 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2285 |
342 | 2286 assert(_markStack.overflow() || _markStack.isEmpty(), |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2287 "mark stack should be empty (unless it overflowed)"); |
342 | 2288 if (_markStack.overflow()) { |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2289 // Should have been done already when we tried to push an |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2290 // entry on to the global mark stack. But let's do it again. |
342 | 2291 set_has_overflown(); |
2292 } | |
2293 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2294 if (rp->processing_is_mt()) { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2295 assert(rp->num_q() == active_workers, "why not"); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2296 rp->enqueue_discovered_references(&par_task_executor); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2297 } else { |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2298 rp->enqueue_discovered_references(); |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2299 } |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2300 |
342 | 2301 rp->verify_no_references_recorded(); |
2302 assert(!rp->discovery_enabled(), "should have been disabled"); | |
2303 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2304 // Now clean up stale oops in StringTable |
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2305 StringTable::unlink(&g1_is_alive); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2306 // Clean up unreferenced symbols in symbol table. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2307 SymbolTable::unlink(); |
342 | 2308 } |
2309 | |
2310 void ConcurrentMark::swapMarkBitMaps() { | |
2311 CMBitMapRO* temp = _prevMarkBitMap; | |
2312 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap; | |
2313 _nextMarkBitMap = (CMBitMap*) temp; | |
2314 } | |
2315 | |
2316 class CMRemarkTask: public AbstractGangTask { | |
2317 private: | |
2318 ConcurrentMark *_cm; | |
2319 | |
2320 public: | |
2321 void work(int worker_i) { | |
2322 // Since all available tasks are actually started, we should | |
2323 // only proceed if we're supposed to be actived. | |
2324 if ((size_t)worker_i < _cm->active_tasks()) { | |
2325 CMTask* task = _cm->task(worker_i); | |
2326 task->record_start_time(); | |
2327 do { | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2328 task->do_marking_step(1000000000.0 /* something very large */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2329 true /* do_stealing */, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2330 true /* do_termination */); |
342 | 2331 } while (task->has_aborted() && !_cm->has_overflown()); |
2332 // If we overflow, then we do not want to restart. We instead | |
2333 // want to abort remark and do concurrent marking again. | |
2334 task->record_end_time(); | |
2335 } | |
2336 } | |
2337 | |
2338 CMRemarkTask(ConcurrentMark* cm) : | |
2339 AbstractGangTask("Par Remark"), _cm(cm) { } | |
2340 }; | |
2341 | |
2342 void ConcurrentMark::checkpointRootsFinalWork() { | |
2343 ResourceMark rm; | |
2344 HandleMark hm; | |
2345 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
2346 | |
2347 g1h->ensure_parsability(false); | |
2348 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
2349 if (G1CollectedHeap::use_parallel_gc_threads()) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2350 G1CollectedHeap::StrongRootsScope srs(g1h); |
342 | 2351 // this is remark, so we'll use up all available threads |
2352 int active_workers = ParallelGCThreads; | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2353 set_phase(active_workers, false /* concurrent */); |
342 | 2354 |
2355 CMRemarkTask remarkTask(this); | |
2356 // We will start all available threads, even if we decide that the | |
2357 // active_workers will be fewer. The extra ones will just bail out | |
2358 // immediately. | |
2359 int n_workers = g1h->workers()->total_workers(); | |
2360 g1h->set_par_threads(n_workers); | |
2361 g1h->workers()->run_task(&remarkTask); | |
2362 g1h->set_par_threads(0); | |
2363 } else { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2364 G1CollectedHeap::StrongRootsScope srs(g1h); |
342 | 2365 // this is remark, so we'll use up all available threads |
2366 int active_workers = 1; | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2367 set_phase(active_workers, false /* concurrent */); |
342 | 2368 |
2369 CMRemarkTask remarkTask(this); | |
2370 // We will start all available threads, even if we decide that the | |
2371 // active_workers will be fewer. The extra ones will just bail out | |
2372 // immediately. | |
2373 remarkTask.work(0); | |
2374 } | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2375 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2376 guarantee(satb_mq_set.completed_buffers_num() == 0, "invariant"); |
342 | 2377 |
2378 print_stats(); | |
2379 | |
2380 #if VERIFY_OBJS_PROCESSED | |
2381 if (_scan_obj_cl.objs_processed != ThreadLocalObjQueue::objs_enqueued) { | |
2382 gclog_or_tty->print_cr("Processed = %d, enqueued = %d.", | |
2383 _scan_obj_cl.objs_processed, | |
2384 ThreadLocalObjQueue::objs_enqueued); | |
2385 guarantee(_scan_obj_cl.objs_processed == | |
2386 ThreadLocalObjQueue::objs_enqueued, | |
2387 "Different number of objs processed and enqueued."); | |
2388 } | |
2389 #endif | |
2390 } | |
2391 | |
1044 | 2392 #ifndef PRODUCT |
2393 | |
1388 | 2394 class PrintReachableOopClosure: public OopClosure { |
342 | 2395 private: |
2396 G1CollectedHeap* _g1h; | |
2397 outputStream* _out; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2398 VerifyOption _vo; |
1388 | 2399 bool _all; |
342 | 2400 |
2401 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2402 PrintReachableOopClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2403 VerifyOption vo, |
1388 | 2404 bool all) : |
1044 | 2405 _g1h(G1CollectedHeap::heap()), |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2406 _out(out), _vo(vo), _all(all) { } |
342 | 2407 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2408 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
|
2409 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
|
2410 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2411 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
|
2412 oop obj = oopDesc::load_decode_heap_oop(p); |
342 | 2413 const char* str = NULL; |
2414 const char* str2 = ""; | |
2415 | |
1388 | 2416 if (obj == NULL) { |
2417 str = ""; | |
2418 } else if (!_g1h->is_in_g1_reserved(obj)) { | |
2419 str = " O"; | |
2420 } else { | |
342 | 2421 HeapRegion* hr = _g1h->heap_region_containing(obj); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2422 guarantee(hr != NULL, "invariant"); |
1044 | 2423 bool over_tams = false; |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2424 bool marked = false; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2425 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2426 switch (_vo) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2427 case VerifyOption_G1UsePrevMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2428 over_tams = hr->obj_allocated_since_prev_marking(obj); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2429 marked = _g1h->isMarkedPrev(obj); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2430 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2431 case VerifyOption_G1UseNextMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2432 over_tams = hr->obj_allocated_since_next_marking(obj); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2433 marked = _g1h->isMarkedNext(obj); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2434 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2435 case VerifyOption_G1UseMarkWord: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2436 marked = obj->is_gc_marked(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2437 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2438 default: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2439 ShouldNotReachHere(); |
1044 | 2440 } |
2441 | |
2442 if (over_tams) { | |
1388 | 2443 str = " >"; |
2444 if (marked) { | |
342 | 2445 str2 = " AND MARKED"; |
1044 | 2446 } |
1388 | 2447 } else if (marked) { |
2448 str = " M"; | |
1044 | 2449 } else { |
1388 | 2450 str = " NOT"; |
1044 | 2451 } |
342 | 2452 } |
2453 | |
1388 | 2454 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s", |
342 | 2455 p, (void*) obj, str, str2); |
2456 } | |
2457 }; | |
2458 | |
1388 | 2459 class PrintReachableObjectClosure : public ObjectClosure { |
342 | 2460 private: |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2461 G1CollectedHeap* _g1h; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2462 outputStream* _out; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2463 VerifyOption _vo; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2464 bool _all; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2465 HeapRegion* _hr; |
342 | 2466 |
2467 public: | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2468 PrintReachableObjectClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2469 VerifyOption vo, |
1388 | 2470 bool all, |
2471 HeapRegion* hr) : | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2472 _g1h(G1CollectedHeap::heap()), |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2473 _out(out), _vo(vo), _all(all), _hr(hr) { } |
1388 | 2474 |
2475 void do_object(oop o) { | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2476 bool over_tams = false; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2477 bool marked = false; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2478 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2479 switch (_vo) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2480 case VerifyOption_G1UsePrevMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2481 over_tams = _hr->obj_allocated_since_prev_marking(o); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2482 marked = _g1h->isMarkedPrev(o); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2483 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2484 case VerifyOption_G1UseNextMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2485 over_tams = _hr->obj_allocated_since_next_marking(o); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2486 marked = _g1h->isMarkedNext(o); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2487 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2488 case VerifyOption_G1UseMarkWord: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2489 marked = o->is_gc_marked(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2490 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2491 default: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2492 ShouldNotReachHere(); |
1388 | 2493 } |
2494 bool print_it = _all || over_tams || marked; | |
2495 | |
2496 if (print_it) { | |
2497 _out->print_cr(" "PTR_FORMAT"%s", | |
2498 o, (over_tams) ? " >" : (marked) ? " M" : ""); | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2499 PrintReachableOopClosure oopCl(_out, _vo, _all); |
1388 | 2500 o->oop_iterate(&oopCl); |
2501 } | |
342 | 2502 } |
2503 }; | |
2504 | |
1388 | 2505 class PrintReachableRegionClosure : public HeapRegionClosure { |
342 | 2506 private: |
2507 outputStream* _out; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2508 VerifyOption _vo; |
1388 | 2509 bool _all; |
342 | 2510 |
2511 public: | |
2512 bool doHeapRegion(HeapRegion* hr) { | |
2513 HeapWord* b = hr->bottom(); | |
2514 HeapWord* e = hr->end(); | |
2515 HeapWord* t = hr->top(); | |
1044 | 2516 HeapWord* p = NULL; |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2517 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2518 switch (_vo) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2519 case VerifyOption_G1UsePrevMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2520 p = hr->prev_top_at_mark_start(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2521 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2522 case VerifyOption_G1UseNextMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2523 p = hr->next_top_at_mark_start(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2524 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2525 case VerifyOption_G1UseMarkWord: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2526 // When we are verifying marking using the mark word |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2527 // TAMS has no relevance. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2528 assert(p == NULL, "post-condition"); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2529 break; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2530 default: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2531 ShouldNotReachHere(); |
1044 | 2532 } |
342 | 2533 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" " |
1044 | 2534 "TAMS: "PTR_FORMAT, b, e, t, p); |
1388 | 2535 _out->cr(); |
2536 | |
2537 HeapWord* from = b; | |
2538 HeapWord* to = t; | |
2539 | |
2540 if (to > from) { | |
2541 _out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to); | |
2542 _out->cr(); | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2543 PrintReachableObjectClosure ocl(_out, _vo, _all, hr); |
1388 | 2544 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl); |
2545 _out->cr(); | |
2546 } | |
342 | 2547 |
2548 return false; | |
2549 } | |
2550 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2551 PrintReachableRegionClosure(outputStream* out, |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2552 VerifyOption vo, |
1388 | 2553 bool all) : |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2554 _out(out), _vo(vo), _all(all) { } |
342 | 2555 }; |
2556 | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2557 static const char* verify_option_to_tams(VerifyOption vo) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2558 switch (vo) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2559 case VerifyOption_G1UsePrevMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2560 return "PTAMS"; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2561 case VerifyOption_G1UseNextMarking: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2562 return "NTAMS"; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2563 default: |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2564 return "NONE"; |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2565 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2566 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2567 |
1388 | 2568 void ConcurrentMark::print_reachable(const char* str, |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2569 VerifyOption vo, |
1388 | 2570 bool all) { |
2571 gclog_or_tty->cr(); | |
2572 gclog_or_tty->print_cr("== Doing heap dump... "); | |
1044 | 2573 |
2574 if (G1PrintReachableBaseFile == NULL) { | |
2575 gclog_or_tty->print_cr(" #### error: no base file defined"); | |
2576 return; | |
2577 } | |
2578 | |
2579 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) > | |
2580 (JVM_MAXPATHLEN - 1)) { | |
2581 gclog_or_tty->print_cr(" #### error: file name too long"); | |
2582 return; | |
2583 } | |
2584 | |
2585 char file_name[JVM_MAXPATHLEN]; | |
2586 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str); | |
2587 gclog_or_tty->print_cr(" dumping to file %s", file_name); | |
2588 | |
2589 fileStream fout(file_name); | |
2590 if (!fout.is_open()) { | |
2591 gclog_or_tty->print_cr(" #### error: could not open file"); | |
2592 return; | |
2593 } | |
2594 | |
2595 outputStream* out = &fout; | |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2596 out->print_cr("-- USING %s", verify_option_to_tams(vo)); |
1044 | 2597 out->cr(); |
2598 | |
1388 | 2599 out->print_cr("--- ITERATING OVER REGIONS"); |
1044 | 2600 out->cr(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2601 PrintReachableRegionClosure rcl(out, vo, all); |
1388 | 2602 _g1h->heap_region_iterate(&rcl); |
1044 | 2603 out->cr(); |
2604 | |
2605 gclog_or_tty->print_cr(" done"); | |
1388 | 2606 gclog_or_tty->flush(); |
342 | 2607 } |
2608 | |
1044 | 2609 #endif // PRODUCT |
2610 | |
342 | 2611 // This note is for drainAllSATBBuffers and the code in between. |
2612 // In the future we could reuse a task to do this work during an | |
2613 // evacuation pause (since now tasks are not active and can be claimed | |
2614 // during an evacuation pause). This was a late change to the code and | |
2615 // is currently not being taken advantage of. | |
2616 | |
2617 class CMGlobalObjectClosure : public ObjectClosure { | |
2618 private: | |
2619 ConcurrentMark* _cm; | |
2620 | |
2621 public: | |
2622 void do_object(oop obj) { | |
2623 _cm->deal_with_reference(obj); | |
2624 } | |
2625 | |
2626 CMGlobalObjectClosure(ConcurrentMark* cm) : _cm(cm) { } | |
2627 }; | |
2628 | |
2629 void ConcurrentMark::deal_with_reference(oop obj) { | |
3771 | 2630 if (verbose_high()) { |
342 | 2631 gclog_or_tty->print_cr("[global] we're dealing with reference "PTR_FORMAT, |
2632 (void*) obj); | |
3771 | 2633 } |
342 | 2634 |
2635 HeapWord* objAddr = (HeapWord*) obj; | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2636 assert(obj->is_oop_or_null(true /* ignore mark word */), "Error"); |
342 | 2637 if (_g1h->is_in_g1_reserved(objAddr)) { |
3771 | 2638 assert(obj != NULL, "null check is implicit"); |
2639 if (!_nextMarkBitMap->isMarked(objAddr)) { | |
2640 // Only get the containing region if the object is not marked on the | |
2641 // bitmap (otherwise, it's a waste of time since we won't do | |
2642 // anything with it). | |
2643 HeapRegion* hr = _g1h->heap_region_containing_raw(obj); | |
2644 if (!hr->obj_allocated_since_next_marking(obj)) { | |
2645 if (verbose_high()) { | |
2646 gclog_or_tty->print_cr("[global] "PTR_FORMAT" is not considered " | |
2647 "marked", (void*) obj); | |
2648 } | |
2649 | |
2650 // we need to mark it first | |
2651 if (_nextMarkBitMap->parMark(objAddr)) { | |
2652 // No OrderAccess:store_load() is needed. It is implicit in the | |
2653 // CAS done in parMark(objAddr) above | |
2654 HeapWord* finger = _finger; | |
2655 if (objAddr < finger) { | |
2656 if (verbose_high()) { | |
2657 gclog_or_tty->print_cr("[global] below the global finger " | |
2658 "("PTR_FORMAT"), pushing it", finger); | |
2659 } | |
2660 if (!mark_stack_push(obj)) { | |
2661 if (verbose_low()) { | |
2662 gclog_or_tty->print_cr("[global] global stack overflow during " | |
2663 "deal_with_reference"); | |
2664 } | |
2665 } | |
342 | 2666 } |
2667 } | |
2668 } | |
2669 } | |
2670 } | |
2671 } | |
2672 | |
2673 void ConcurrentMark::drainAllSATBBuffers() { | |
2674 CMGlobalObjectClosure oc(this); | |
2675 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
2676 satb_mq_set.set_closure(&oc); | |
2677 | |
2678 while (satb_mq_set.apply_closure_to_completed_buffer()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2679 if (verbose_medium()) { |
342 | 2680 gclog_or_tty->print_cr("[global] processed an SATB buffer"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2681 } |
342 | 2682 } |
2683 | |
2684 // no need to check whether we should do this, as this is only | |
2685 // called during an evacuation pause | |
2686 satb_mq_set.iterate_closure_all_threads(); | |
2687 | |
2688 satb_mq_set.set_closure(NULL); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2689 assert(satb_mq_set.completed_buffers_num() == 0, "invariant"); |
342 | 2690 } |
2691 | |
2692 void ConcurrentMark::markPrev(oop p) { | |
2693 // Note we are overriding the read-only view of the prev map here, via | |
2694 // the cast. | |
2695 ((CMBitMap*)_prevMarkBitMap)->mark((HeapWord*)p); | |
2696 } | |
2697 | |
2698 void ConcurrentMark::clear(oop p) { | |
2699 assert(p != NULL && p->is_oop(), "expected an oop"); | |
2700 HeapWord* addr = (HeapWord*)p; | |
2701 assert(addr >= _nextMarkBitMap->startWord() || | |
2702 addr < _nextMarkBitMap->endWord(), "in a region"); | |
2703 | |
2704 _nextMarkBitMap->clear(addr); | |
2705 } | |
2706 | |
2707 void ConcurrentMark::clearRangeBothMaps(MemRegion mr) { | |
2708 // Note we are overriding the read-only view of the prev map here, via | |
2709 // the cast. | |
2710 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr); | |
2711 _nextMarkBitMap->clearRange(mr); | |
2712 } | |
2713 | |
2714 HeapRegion* | |
2715 ConcurrentMark::claim_region(int task_num) { | |
2716 // "checkpoint" the finger | |
2717 HeapWord* finger = _finger; | |
2718 | |
2719 // _heap_end will not change underneath our feet; it only changes at | |
2720 // yield points. | |
2721 while (finger < _heap_end) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2722 assert(_g1h->is_in_g1_reserved(finger), "invariant"); |
342 | 2723 |
3771 | 2724 // Note on how this code handles humongous regions. In the |
2725 // normal case the finger will reach the start of a "starts | |
2726 // humongous" (SH) region. Its end will either be the end of the | |
2727 // last "continues humongous" (CH) region in the sequence, or the | |
2728 // standard end of the SH region (if the SH is the only region in | |
2729 // the sequence). That way claim_region() will skip over the CH | |
2730 // regions. However, there is a subtle race between a CM thread | |
2731 // executing this method and a mutator thread doing a humongous | |
2732 // object allocation. The two are not mutually exclusive as the CM | |
2733 // thread does not need to hold the Heap_lock when it gets | |
2734 // here. So there is a chance that claim_region() will come across | |
2735 // a free region that's in the progress of becoming a SH or a CH | |
2736 // region. In the former case, it will either | |
2737 // a) Miss the update to the region's end, in which case it will | |
2738 // visit every subsequent CH region, will find their bitmaps | |
2739 // empty, and do nothing, or | |
2740 // b) Will observe the update of the region's end (in which case | |
2741 // it will skip the subsequent CH regions). | |
2742 // If it comes across a region that suddenly becomes CH, the | |
2743 // scenario will be similar to b). So, the race between | |
2744 // claim_region() and a humongous object allocation might force us | |
2745 // to do a bit of unnecessary work (due to some unnecessary bitmap | |
2746 // iterations) but it should not introduce and correctness issues. | |
2747 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger); | |
342 | 2748 HeapWord* bottom = curr_region->bottom(); |
2749 HeapWord* end = curr_region->end(); | |
2750 HeapWord* limit = curr_region->next_top_at_mark_start(); | |
2751 | |
3771 | 2752 if (verbose_low()) { |
342 | 2753 gclog_or_tty->print_cr("[%d] curr_region = "PTR_FORMAT" " |
2754 "["PTR_FORMAT", "PTR_FORMAT"), " | |
2755 "limit = "PTR_FORMAT, | |
2756 task_num, curr_region, bottom, end, limit); | |
3771 | 2757 } |
2758 | |
2759 // Is the gap between reading the finger and doing the CAS too long? | |
2760 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger); | |
342 | 2761 if (res == finger) { |
2762 // we succeeded | |
2763 | |
2764 // notice that _finger == end cannot be guaranteed here since, | |
2765 // someone else might have moved the finger even further | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2766 assert(_finger >= end, "the finger should have moved forward"); |
342 | 2767 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2768 if (verbose_low()) { |
342 | 2769 gclog_or_tty->print_cr("[%d] we were successful with region = " |
2770 PTR_FORMAT, task_num, curr_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2771 } |
342 | 2772 |
2773 if (limit > bottom) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2774 if (verbose_low()) { |
342 | 2775 gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is not empty, " |
2776 "returning it ", task_num, curr_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2777 } |
342 | 2778 return curr_region; |
2779 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2780 assert(limit == bottom, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2781 "the region limit should be at bottom"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2782 if (verbose_low()) { |
342 | 2783 gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is empty, " |
2784 "returning NULL", task_num, curr_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2785 } |
342 | 2786 // we return NULL and the caller should try calling |
2787 // claim_region() again. | |
2788 return NULL; | |
2789 } | |
2790 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2791 assert(_finger > finger, "the finger should have moved forward"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2792 if (verbose_low()) { |
342 | 2793 gclog_or_tty->print_cr("[%d] somebody else moved the finger, " |
2794 "global finger = "PTR_FORMAT", " | |
2795 "our finger = "PTR_FORMAT, | |
2796 task_num, _finger, finger); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2797 } |
342 | 2798 |
2799 // read it again | |
2800 finger = _finger; | |
2801 } | |
2802 } | |
2803 | |
2804 return NULL; | |
2805 } | |
2806 | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2807 bool ConcurrentMark::invalidate_aborted_regions_in_cset() { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2808 bool result = false; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2809 for (int i = 0; i < (int)_max_task_num; ++i) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2810 CMTask* the_task = _tasks[i]; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2811 MemRegion mr = the_task->aborted_region(); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2812 if (mr.start() != NULL) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2813 assert(mr.end() != NULL, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2814 assert(mr.word_size() > 0, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2815 HeapRegion* hr = _g1h->heap_region_containing(mr.start()); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2816 assert(hr != NULL, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2817 if (hr->in_collection_set()) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2818 // The region points into the collection set |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2819 the_task->set_aborted_region(MemRegion()); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2820 result = true; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2821 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2822 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2823 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2824 return result; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2825 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2826 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2827 bool ConcurrentMark::has_aborted_regions() { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2828 for (int i = 0; i < (int)_max_task_num; ++i) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2829 CMTask* the_task = _tasks[i]; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2830 MemRegion mr = the_task->aborted_region(); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2831 if (mr.start() != NULL) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2832 assert(mr.end() != NULL, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2833 assert(mr.word_size() > 0, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2834 return true; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2835 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2836 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2837 return false; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2838 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2839 |
342 | 2840 void ConcurrentMark::oops_do(OopClosure* cl) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2841 if (_markStack.size() > 0 && verbose_low()) { |
342 | 2842 gclog_or_tty->print_cr("[global] scanning the global marking stack, " |
2843 "size = %d", _markStack.size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2844 } |
342 | 2845 // we first iterate over the contents of the mark stack... |
2846 _markStack.oops_do(cl); | |
2847 | |
2848 for (int i = 0; i < (int)_max_task_num; ++i) { | |
2849 OopTaskQueue* queue = _task_queues->queue((int)i); | |
2850 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2851 if (queue->size() > 0 && verbose_low()) { |
342 | 2852 gclog_or_tty->print_cr("[global] scanning task queue of task %d, " |
2853 "size = %d", i, queue->size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2854 } |
342 | 2855 |
2856 // ...then over the contents of the all the task queues. | |
2857 queue->oops_do(cl); | |
2858 } | |
2859 | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2860 // Invalidate any entries, that are in the region stack, that |
342 | 2861 // point into the collection set |
2862 if (_regionStack.invalidate_entries_into_cset()) { | |
2863 // otherwise, any gray objects copied during the evacuation pause | |
2864 // might not be visited. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2865 assert(_should_gray_objects, "invariant"); |
342 | 2866 } |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2867 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2868 // Invalidate any aborted regions, recorded in the individual CM |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2869 // tasks, that point into the collection set. |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2870 if (invalidate_aborted_regions_in_cset()) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2871 // otherwise, any gray objects copied during the evacuation pause |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2872 // might not be visited. |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2873 assert(_should_gray_objects, "invariant"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2874 } |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2875 |
342 | 2876 } |
2877 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2878 void ConcurrentMark::clear_marking_state(bool clear_overflow) { |
342 | 2879 _markStack.setEmpty(); |
2880 _markStack.clear_overflow(); | |
2881 _regionStack.setEmpty(); | |
2882 _regionStack.clear_overflow(); | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2883 if (clear_overflow) { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2884 clear_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
|
2885 } else { |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2886 assert(has_overflown(), "pre-condition"); |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2887 } |
342 | 2888 _finger = _heap_start; |
2889 | |
2890 for (int i = 0; i < (int)_max_task_num; ++i) { | |
2891 OopTaskQueue* queue = _task_queues->queue(i); | |
2892 queue->set_empty(); | |
1885
a5c514e74487
6988458: G1: assert(mr.end() <= _cm->finger()) failed: otherwise the region shouldn't be on the stack
johnc
parents:
1835
diff
changeset
|
2893 // Clear any partial regions from the CMTasks |
a5c514e74487
6988458: G1: assert(mr.end() <= _cm->finger()) failed: otherwise the region shouldn't be on the stack
johnc
parents:
1835
diff
changeset
|
2894 _tasks[i]->clear_aborted_region(); |
342 | 2895 } |
2896 } | |
2897 | |
2898 void ConcurrentMark::print_stats() { | |
2899 if (verbose_stats()) { | |
2900 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
2901 for (size_t i = 0; i < _active_tasks; ++i) { | |
2902 _tasks[i]->print_stats(); | |
2903 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
2904 } | |
2905 } | |
2906 } | |
2907 | |
2908 class CSMarkOopClosure: public OopClosure { | |
2909 friend class CSMarkBitMapClosure; | |
2910 | |
2911 G1CollectedHeap* _g1h; | |
2912 CMBitMap* _bm; | |
2913 ConcurrentMark* _cm; | |
2914 oop* _ms; | |
2915 jint* _array_ind_stack; | |
2916 int _ms_size; | |
2917 int _ms_ind; | |
2918 int _array_increment; | |
2919 | |
2920 bool push(oop obj, int arr_ind = 0) { | |
2921 if (_ms_ind == _ms_size) { | |
2922 gclog_or_tty->print_cr("Mark stack is full."); | |
2923 return false; | |
2924 } | |
2925 _ms[_ms_ind] = obj; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2926 if (obj->is_objArray()) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2927 _array_ind_stack[_ms_ind] = arr_ind; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2928 } |
342 | 2929 _ms_ind++; |
2930 return true; | |
2931 } | |
2932 | |
2933 oop pop() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2934 if (_ms_ind == 0) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2935 return NULL; |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2936 } else { |
342 | 2937 _ms_ind--; |
2938 return _ms[_ms_ind]; | |
2939 } | |
2940 } | |
2941 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2942 template <class T> bool drain() { |
342 | 2943 while (_ms_ind > 0) { |
2944 oop obj = pop(); | |
2945 assert(obj != NULL, "Since index was non-zero."); | |
2946 if (obj->is_objArray()) { | |
2947 jint arr_ind = _array_ind_stack[_ms_ind]; | |
2948 objArrayOop aobj = objArrayOop(obj); | |
2949 jint len = aobj->length(); | |
2950 jint next_arr_ind = arr_ind + _array_increment; | |
2951 if (next_arr_ind < len) { | |
2952 push(obj, next_arr_ind); | |
2953 } | |
2954 // Now process this portion of this one. | |
2955 int lim = MIN2(next_arr_ind, len); | |
2956 for (int j = arr_ind; j < lim; j++) { | |
912
308762b2bf14
6872000: G1: compilation fails on linux/older gcc
apetrusenko
parents:
866
diff
changeset
|
2957 do_oop(aobj->objArrayOopDesc::obj_at_addr<T>(j)); |
342 | 2958 } |
2959 | |
2960 } else { | |
2961 obj->oop_iterate(this); | |
2962 } | |
2963 if (abort()) return false; | |
2964 } | |
2965 return true; | |
2966 } | |
2967 | |
2968 public: | |
2969 CSMarkOopClosure(ConcurrentMark* cm, int ms_size) : | |
2970 _g1h(G1CollectedHeap::heap()), | |
2971 _cm(cm), | |
2972 _bm(cm->nextMarkBitMap()), | |
2973 _ms_size(ms_size), _ms_ind(0), | |
2974 _ms(NEW_C_HEAP_ARRAY(oop, ms_size)), | |
2975 _array_ind_stack(NEW_C_HEAP_ARRAY(jint, ms_size)), | |
2976 _array_increment(MAX2(ms_size/8, 16)) | |
2977 {} | |
2978 | |
2979 ~CSMarkOopClosure() { | |
2980 FREE_C_HEAP_ARRAY(oop, _ms); | |
2981 FREE_C_HEAP_ARRAY(jint, _array_ind_stack); | |
2982 } | |
2983 | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2984 virtual 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
|
2985 virtual 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
|
2986 |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2987 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
|
2988 T heap_oop = oopDesc::load_heap_oop(p); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2989 if (oopDesc::is_null(heap_oop)) return; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2990 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
342 | 2991 if (obj->is_forwarded()) { |
2992 // If the object has already been forwarded, we have to make sure | |
2993 // that it's marked. So follow the forwarding pointer. Note that | |
2994 // this does the right thing for self-forwarding pointers in the | |
2995 // evacuation failure case. | |
2996 obj = obj->forwardee(); | |
2997 } | |
2998 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
2999 if (hr != NULL) { | |
3000 if (hr->in_collection_set()) { | |
3001 if (_g1h->is_obj_ill(obj)) { | |
3002 _bm->mark((HeapWord*)obj); | |
3003 if (!push(obj)) { | |
3004 gclog_or_tty->print_cr("Setting abort in CSMarkOopClosure because push failed."); | |
3005 set_abort(); | |
3006 } | |
3007 } | |
3008 } else { | |
3009 // Outside the collection set; we need to gray it | |
3010 _cm->deal_with_reference(obj); | |
3011 } | |
3012 } | |
3013 } | |
3014 }; | |
3015 | |
3016 class CSMarkBitMapClosure: public BitMapClosure { | |
3017 G1CollectedHeap* _g1h; | |
3018 CMBitMap* _bitMap; | |
3019 ConcurrentMark* _cm; | |
3020 CSMarkOopClosure _oop_cl; | |
3021 public: | |
3022 CSMarkBitMapClosure(ConcurrentMark* cm, int ms_size) : | |
3023 _g1h(G1CollectedHeap::heap()), | |
3024 _bitMap(cm->nextMarkBitMap()), | |
3025 _oop_cl(cm, ms_size) | |
3026 {} | |
3027 | |
3028 ~CSMarkBitMapClosure() {} | |
3029 | |
3030 bool do_bit(size_t offset) { | |
3031 // convert offset into a HeapWord* | |
3032 HeapWord* addr = _bitMap->offsetToHeapWord(offset); | |
3033 assert(_bitMap->endWord() && addr < _bitMap->endWord(), | |
3034 "address out of range"); | |
3035 assert(_bitMap->isMarked(addr), "tautology"); | |
3036 oop obj = oop(addr); | |
3037 if (!obj->is_forwarded()) { | |
3038 if (!_oop_cl.push(obj)) return false; | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
3039 if (UseCompressedOops) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
3040 if (!_oop_cl.drain<narrowOop>()) return false; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
3041 } else { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
3042 if (!_oop_cl.drain<oop>()) return false; |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
3043 } |
342 | 3044 } |
3045 // Otherwise... | |
3046 return true; | |
3047 } | |
3048 }; | |
3049 | |
3050 | |
3051 class CompleteMarkingInCSHRClosure: public HeapRegionClosure { | |
3052 CMBitMap* _bm; | |
3053 CSMarkBitMapClosure _bit_cl; | |
3054 enum SomePrivateConstants { | |
3055 MSSize = 1000 | |
3056 }; | |
3057 bool _completed; | |
3058 public: | |
3059 CompleteMarkingInCSHRClosure(ConcurrentMark* cm) : | |
3060 _bm(cm->nextMarkBitMap()), | |
3061 _bit_cl(cm, MSSize), | |
3062 _completed(true) | |
3063 {} | |
3064 | |
3065 ~CompleteMarkingInCSHRClosure() {} | |
3066 | |
3067 bool doHeapRegion(HeapRegion* r) { | |
3068 if (!r->evacuation_failed()) { | |
3069 MemRegion mr = MemRegion(r->bottom(), r->next_top_at_mark_start()); | |
3070 if (!mr.is_empty()) { | |
3071 if (!_bm->iterate(&_bit_cl, mr)) { | |
3072 _completed = false; | |
3073 return true; | |
3074 } | |
3075 } | |
3076 } | |
3077 return false; | |
3078 } | |
3079 | |
3080 bool completed() { return _completed; } | |
3081 }; | |
3082 | |
3083 class ClearMarksInHRClosure: public HeapRegionClosure { | |
3084 CMBitMap* _bm; | |
3085 public: | |
3086 ClearMarksInHRClosure(CMBitMap* bm): _bm(bm) { } | |
3087 | |
3088 bool doHeapRegion(HeapRegion* r) { | |
3089 if (!r->used_region().is_empty() && !r->evacuation_failed()) { | |
3090 MemRegion usedMR = r->used_region(); | |
3091 _bm->clearRange(r->used_region()); | |
3092 } | |
3093 return false; | |
3094 } | |
3095 }; | |
3096 | |
3097 void ConcurrentMark::complete_marking_in_collection_set() { | |
3098 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
3099 | |
3100 if (!g1h->mark_in_progress()) { | |
3101 g1h->g1_policy()->record_mark_closure_time(0.0); | |
3102 return; | |
3103 } | |
3104 | |
3105 int i = 1; | |
3106 double start = os::elapsedTime(); | |
3107 while (true) { | |
3108 i++; | |
3109 CompleteMarkingInCSHRClosure cmplt(this); | |
3110 g1h->collection_set_iterate(&cmplt); | |
3111 if (cmplt.completed()) break; | |
3112 } | |
3113 double end_time = os::elapsedTime(); | |
3114 double elapsed_time_ms = (end_time - start) * 1000.0; | |
3115 g1h->g1_policy()->record_mark_closure_time(elapsed_time_ms); | |
3116 | |
3117 ClearMarksInHRClosure clr(nextMarkBitMap()); | |
3118 g1h->collection_set_iterate(&clr); | |
3119 } | |
3120 | |
3121 // The next two methods deal with the following optimisation. Some | |
3122 // objects are gray by being marked and located above the finger. If | |
3123 // they are copied, during an evacuation pause, below the finger then | |
3124 // the need to be pushed on the stack. The observation is that, if | |
3125 // there are no regions in the collection set located above the | |
3126 // finger, then the above cannot happen, hence we do not need to | |
3127 // explicitly gray any objects when copying them to below the | |
3128 // finger. The global stack will be scanned to ensure that, if it | |
3129 // points to objects being copied, it will update their | |
3130 // location. There is a tricky situation with the gray objects in | |
3131 // region stack that are being coped, however. See the comment in | |
3132 // newCSet(). | |
3133 | |
3134 void ConcurrentMark::newCSet() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3135 if (!concurrent_marking_in_progress()) { |
342 | 3136 // nothing to do if marking is not in progress |
3137 return; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3138 } |
342 | 3139 |
3140 // find what the lowest finger is among the global and local fingers | |
3141 _min_finger = _finger; | |
3142 for (int i = 0; i < (int)_max_task_num; ++i) { | |
3143 CMTask* task = _tasks[i]; | |
3144 HeapWord* task_finger = task->finger(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3145 if (task_finger != NULL && task_finger < _min_finger) { |
342 | 3146 _min_finger = task_finger; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3147 } |
342 | 3148 } |
3149 | |
3150 _should_gray_objects = false; | |
3151 | |
3152 // This fixes a very subtle and fustrating bug. It might be the case | |
3153 // that, during en evacuation pause, heap regions that contain | |
3154 // objects that are gray (by being in regions contained in the | |
3155 // region stack) are included in the collection set. Since such gray | |
3156 // objects will be moved, and because it's not easy to redirect | |
3157 // region stack entries to point to a new location (because objects | |
3158 // in one region might be scattered to multiple regions after they | |
3159 // are copied), one option is to ensure that all marked objects | |
3160 // copied during a pause are pushed on the stack. Notice, however, | |
3161 // that this problem can only happen when the region stack is not | |
3162 // empty during an evacuation pause. So, we make the fix a bit less | |
3163 // conservative and ensure that regions are pushed on the stack, | |
3164 // irrespective whether all collection set regions are below the | |
3165 // finger, if the region stack is not empty. This is expected to be | |
3166 // a rare case, so I don't think it's necessary to be smarted about it. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3167 if (!region_stack_empty() || has_aborted_regions()) { |
342 | 3168 _should_gray_objects = true; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3169 } |
342 | 3170 } |
3171 | |
3172 void ConcurrentMark::registerCSetRegion(HeapRegion* hr) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3173 if (!concurrent_marking_in_progress()) return; |
342 | 3174 |
3175 HeapWord* region_end = hr->end(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3176 if (region_end > _min_finger) { |
342 | 3177 _should_gray_objects = true; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3178 } |
342 | 3179 } |
3180 | |
3378
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3181 // Resets the region fields of active CMTasks whose values point |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3182 // into the collection set. |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3183 void ConcurrentMark::reset_active_task_region_fields_in_cset() { |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3184 assert(SafepointSynchronize::is_at_safepoint(), "should be in STW"); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3185 assert(parallel_marking_threads() <= _max_task_num, "sanity"); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3186 |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3187 for (int i = 0; i < (int)parallel_marking_threads(); i += 1) { |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3188 CMTask* task = _tasks[i]; |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3189 HeapWord* task_finger = task->finger(); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3190 if (task_finger != NULL) { |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3191 assert(_g1h->is_in_g1_reserved(task_finger), "not in heap"); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3192 HeapRegion* finger_region = _g1h->heap_region_containing(task_finger); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3193 if (finger_region->in_collection_set()) { |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3194 // The task's current region is in the collection set. |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3195 // This region will be evacuated in the current GC and |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3196 // the region fields in the task will be stale. |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3197 task->giveup_current_region(); |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3198 } |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3199 } |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3200 } |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3201 } |
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3317
diff
changeset
|
3202 |
342 | 3203 // abandon current marking iteration due to a Full GC |
3204 void ConcurrentMark::abort() { | |
3205 // Clear all marks to force marking thread to do nothing | |
3206 _nextMarkBitMap->clearAll(); | |
3207 // Empty mark stack | |
3208 clear_marking_state(); | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3209 for (int i = 0; i < (int)_max_task_num; ++i) { |
342 | 3210 _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
|
3211 } |
342 | 3212 _has_aborted = true; |
3213 | |
3214 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3215 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
|
3216 // 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
|
3217 // 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
|
3218 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
|
3219 false, /* new active value */ |
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3220 satb_mq_set.is_active() /* expected_active */); |
342 | 3221 } |
3222 | |
3223 static void print_ms_time_info(const char* prefix, const char* name, | |
3224 NumberSeq& ns) { | |
3225 gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).", | |
3226 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg()); | |
3227 if (ns.num() > 0) { | |
3228 gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]", | |
3229 prefix, ns.sd(), ns.maximum()); | |
3230 } | |
3231 } | |
3232 | |
3233 void ConcurrentMark::print_summary_info() { | |
3234 gclog_or_tty->print_cr(" Concurrent marking:"); | |
3235 print_ms_time_info(" ", "init marks", _init_times); | |
3236 print_ms_time_info(" ", "remarks", _remark_times); | |
3237 { | |
3238 print_ms_time_info(" ", "final marks", _remark_mark_times); | |
3239 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times); | |
3240 | |
3241 } | |
3242 print_ms_time_info(" ", "cleanups", _cleanup_times); | |
3243 gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).", | |
3244 _total_counting_time, | |
3245 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 / | |
3246 (double)_cleanup_times.num() | |
3247 : 0.0)); | |
3248 if (G1ScrubRemSets) { | |
3249 gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).", | |
3250 _total_rs_scrub_time, | |
3251 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 / | |
3252 (double)_cleanup_times.num() | |
3253 : 0.0)); | |
3254 } | |
3255 gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.", | |
3256 (_init_times.sum() + _remark_times.sum() + | |
3257 _cleanup_times.sum())/1000.0); | |
3258 gclog_or_tty->print_cr(" Total concurrent time = %8.2f s " | |
3259 "(%8.2f s marking, %8.2f s counting).", | |
3260 cmThread()->vtime_accum(), | |
3261 cmThread()->vtime_mark_accum(), | |
3262 cmThread()->vtime_count_accum()); | |
3263 } | |
3264 | |
1019 | 3265 void ConcurrentMark::print_worker_threads_on(outputStream* st) const { |
3266 _parallel_workers->print_worker_threads_on(st); | |
3267 } | |
3268 | |
342 | 3269 // Closures |
3270 // XXX: there seems to be a lot of code duplication here; | |
3271 // should refactor and consolidate the shared code. | |
3272 | |
3273 // This closure is used to mark refs into the CMS generation in | |
3274 // the CMS bit map. Called at the first checkpoint. | |
3275 | |
3276 // We take a break if someone is trying to stop the world. | |
3277 bool ConcurrentMark::do_yield_check(int worker_i) { | |
3278 if (should_yield()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3279 if (worker_i == 0) { |
342 | 3280 _g1h->g1_policy()->record_concurrent_pause(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3281 } |
342 | 3282 cmThread()->yield(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3283 if (worker_i == 0) { |
342 | 3284 _g1h->g1_policy()->record_concurrent_pause_end(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3285 } |
342 | 3286 return true; |
3287 } else { | |
3288 return false; | |
3289 } | |
3290 } | |
3291 | |
3292 bool ConcurrentMark::should_yield() { | |
3293 return cmThread()->should_yield(); | |
3294 } | |
3295 | |
3296 bool ConcurrentMark::containing_card_is_marked(void* p) { | |
3297 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1); | |
3298 return _card_bm.at(offset >> CardTableModRefBS::card_shift); | |
3299 } | |
3300 | |
3301 bool ConcurrentMark::containing_cards_are_marked(void* start, | |
3302 void* last) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3303 return containing_card_is_marked(start) && |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3304 containing_card_is_marked(last); |
342 | 3305 } |
3306 | |
3307 #ifndef PRODUCT | |
3308 // for debugging purposes | |
3309 void ConcurrentMark::print_finger() { | |
3310 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT, | |
3311 _heap_start, _heap_end, _finger); | |
3312 for (int i = 0; i < (int) _max_task_num; ++i) { | |
3313 gclog_or_tty->print(" %d: "PTR_FORMAT, i, _tasks[i]->finger()); | |
3314 } | |
3315 gclog_or_tty->print_cr(""); | |
3316 } | |
3317 #endif | |
3318 | |
3771 | 3319 void CMTask::scan_object(oop obj) { |
3320 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant"); | |
3321 | |
3322 if (_cm->verbose_high()) { | |
3323 gclog_or_tty->print_cr("[%d] we're scanning object "PTR_FORMAT, | |
3324 _task_id, (void*) obj); | |
3325 } | |
3326 | |
3327 size_t obj_size = obj->size(); | |
3328 _words_scanned += obj_size; | |
3329 | |
3330 obj->oop_iterate(_cm_oop_closure); | |
3331 statsOnly( ++_objs_scanned ); | |
3332 check_limits(); | |
3333 } | |
3334 | |
342 | 3335 // Closure for iteration over bitmaps |
3336 class CMBitMapClosure : public BitMapClosure { | |
3337 private: | |
3338 // the bitmap that is being iterated over | |
3339 CMBitMap* _nextMarkBitMap; | |
3340 ConcurrentMark* _cm; | |
3341 CMTask* _task; | |
3342 // true if we're scanning a heap region claimed by the task (so that | |
3343 // we move the finger along), false if we're not, i.e. currently when | |
3344 // scanning a heap region popped from the region stack (so that we | |
3345 // do not move the task finger along; it'd be a mistake if we did so). | |
3346 bool _scanning_heap_region; | |
3347 | |
3348 public: | |
3349 CMBitMapClosure(CMTask *task, | |
3350 ConcurrentMark* cm, | |
3351 CMBitMap* nextMarkBitMap) | |
3352 : _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { } | |
3353 | |
3354 void set_scanning_heap_region(bool scanning_heap_region) { | |
3355 _scanning_heap_region = scanning_heap_region; | |
3356 } | |
3357 | |
3358 bool do_bit(size_t offset) { | |
3359 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3360 assert(_nextMarkBitMap->isMarked(addr), "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3361 assert( addr < _cm->finger(), "invariant"); |
342 | 3362 |
3363 if (_scanning_heap_region) { | |
3364 statsOnly( _task->increase_objs_found_on_bitmap() ); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3365 assert(addr >= _task->finger(), "invariant"); |
342 | 3366 // We move that task's local finger along. |
3367 _task->move_finger_to(addr); | |
3368 } else { | |
3369 // We move the task's region finger along. | |
3370 _task->move_region_finger_to(addr); | |
3371 } | |
3372 | |
3373 _task->scan_object(oop(addr)); | |
3374 // we only partially drain the local queue and global stack | |
3375 _task->drain_local_queue(true); | |
3376 _task->drain_global_stack(true); | |
3377 | |
3378 // if the has_aborted flag has been raised, we need to bail out of | |
3379 // the iteration | |
3380 return !_task->has_aborted(); | |
3381 } | |
3382 }; | |
3383 | |
3384 // Closure for iterating over objects, currently only used for | |
3385 // processing SATB buffers. | |
3386 class CMObjectClosure : public ObjectClosure { | |
3387 private: | |
3388 CMTask* _task; | |
3389 | |
3390 public: | |
3391 void do_object(oop obj) { | |
3392 _task->deal_with_reference(obj); | |
3393 } | |
3394 | |
3395 CMObjectClosure(CMTask* task) : _task(task) { } | |
3396 }; | |
3397 | |
3771 | 3398 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h, |
3399 ConcurrentMark* cm, | |
3400 CMTask* task) | |
3401 : _g1h(g1h), _cm(cm), _task(task) { | |
3402 assert(_ref_processor == NULL, "should be initialized to NULL"); | |
3403 | |
3404 if (G1UseConcMarkReferenceProcessing) { | |
3405 _ref_processor = g1h->ref_processor(); | |
3406 assert(_ref_processor != NULL, "should not be NULL"); | |
342 | 3407 } |
3771 | 3408 } |
342 | 3409 |
3410 void CMTask::setup_for_region(HeapRegion* hr) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3411 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3412 assert(hr != NULL, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3413 "claim_region() should have filtered out continues humongous regions"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3414 assert(!hr->continuesHumongous(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3415 "claim_region() should have filtered out continues humongous regions"); |
342 | 3416 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3417 if (_cm->verbose_low()) { |
342 | 3418 gclog_or_tty->print_cr("[%d] setting up for region "PTR_FORMAT, |
3419 _task_id, hr); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3420 } |
342 | 3421 |
3422 _curr_region = hr; | |
3423 _finger = hr->bottom(); | |
3424 update_region_limit(); | |
3425 } | |
3426 | |
3427 void CMTask::update_region_limit() { | |
3428 HeapRegion* hr = _curr_region; | |
3429 HeapWord* bottom = hr->bottom(); | |
3430 HeapWord* limit = hr->next_top_at_mark_start(); | |
3431 | |
3432 if (limit == bottom) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3433 if (_cm->verbose_low()) { |
342 | 3434 gclog_or_tty->print_cr("[%d] found an empty region " |
3435 "["PTR_FORMAT", "PTR_FORMAT")", | |
3436 _task_id, bottom, limit); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3437 } |
342 | 3438 // The region was collected underneath our feet. |
3439 // We set the finger to bottom to ensure that the bitmap | |
3440 // iteration that will follow this will not do anything. | |
3441 // (this is not a condition that holds when we set the region up, | |
3442 // as the region is not supposed to be empty in the first place) | |
3443 _finger = bottom; | |
3444 } else if (limit >= _region_limit) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3445 assert(limit >= _finger, "peace of mind"); |
342 | 3446 } else { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3447 assert(limit < _region_limit, "only way to get here"); |
342 | 3448 // This can happen under some pretty unusual circumstances. An |
3449 // evacuation pause empties the region underneath our feet (NTAMS | |
3450 // at bottom). We then do some allocation in the region (NTAMS | |
3451 // stays at bottom), followed by the region being used as a GC | |
3452 // alloc region (NTAMS will move to top() and the objects | |
3453 // originally below it will be grayed). All objects now marked in | |
3454 // the region are explicitly grayed, if below the global finger, | |
3455 // and we do not need in fact to scan anything else. So, we simply | |
3456 // set _finger to be limit to ensure that the bitmap iteration | |
3457 // doesn't do anything. | |
3458 _finger = limit; | |
3459 } | |
3460 | |
3461 _region_limit = limit; | |
3462 } | |
3463 | |
3464 void CMTask::giveup_current_region() { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3465 assert(_curr_region != NULL, "invariant"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3466 if (_cm->verbose_low()) { |
342 | 3467 gclog_or_tty->print_cr("[%d] giving up region "PTR_FORMAT, |
3468 _task_id, _curr_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3469 } |
342 | 3470 clear_region_fields(); |
3471 } | |
3472 | |
3473 void CMTask::clear_region_fields() { | |
3474 // Values for these three fields that indicate that we're not | |
3475 // holding on to a region. | |
3476 _curr_region = NULL; | |
3477 _finger = NULL; | |
3478 _region_limit = NULL; | |
3479 | |
3480 _region_finger = NULL; | |
3481 } | |
3482 | |
3771 | 3483 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) { |
3484 if (cm_oop_closure == NULL) { | |
3485 assert(_cm_oop_closure != NULL, "invariant"); | |
3486 } else { | |
3487 assert(_cm_oop_closure == NULL, "invariant"); | |
3488 } | |
3489 _cm_oop_closure = cm_oop_closure; | |
3490 } | |
3491 | |
342 | 3492 void CMTask::reset(CMBitMap* nextMarkBitMap) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3493 guarantee(nextMarkBitMap != NULL, "invariant"); |
342 | 3494 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3495 if (_cm->verbose_low()) { |
342 | 3496 gclog_or_tty->print_cr("[%d] resetting", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3497 } |
342 | 3498 |
3499 _nextMarkBitMap = nextMarkBitMap; | |
3500 clear_region_fields(); | |
1885
a5c514e74487
6988458: G1: assert(mr.end() <= _cm->finger()) failed: otherwise the region shouldn't be on the stack
johnc
parents:
1835
diff
changeset
|
3501 assert(_aborted_region.is_empty(), "should have been cleared"); |
342 | 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 _region_stack_pops = 0; | |
3519 _regions_claimed = 0; | |
3520 _objs_found_on_bitmap = 0; | |
3521 _satb_buffers_processed = 0; | |
3522 _steal_attempts = 0; | |
3523 _steals = 0; | |
3524 _aborted = 0; | |
3525 _aborted_overflow = 0; | |
3526 _aborted_cm_aborted = 0; | |
3527 _aborted_yield = 0; | |
3528 _aborted_timed_out = 0; | |
3529 _aborted_satb = 0; | |
3530 _aborted_termination = 0; | |
3531 #endif // _MARKING_STATS_ | |
3532 } | |
3533 | |
3534 bool CMTask::should_exit_termination() { | |
3535 regular_clock_call(); | |
3536 // This is called when we are in the termination protocol. We should | |
3537 // quit if, for some reason, this task wants to abort or the global | |
3538 // stack is not empty (this means that we can get work from it). | |
3539 return !_cm->mark_stack_empty() || has_aborted(); | |
3540 } | |
3541 | |
3542 void CMTask::reached_limit() { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3543 assert(_words_scanned >= _words_scanned_limit || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3544 _refs_reached >= _refs_reached_limit , |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3545 "shouldn't have been called otherwise"); |
342 | 3546 regular_clock_call(); |
3547 } | |
3548 | |
3549 void CMTask::regular_clock_call() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3550 if (has_aborted()) return; |
342 | 3551 |
3552 // First, we need to recalculate the words scanned and refs reached | |
3553 // limits for the next clock call. | |
3554 recalculate_limits(); | |
3555 | |
3556 // During the regular clock call we do the following | |
3557 | |
3558 // (1) If an overflow has been flagged, then we abort. | |
3559 if (_cm->has_overflown()) { | |
3560 set_has_aborted(); | |
3561 return; | |
3562 } | |
3563 | |
3564 // If we are not concurrent (i.e. we're doing remark) we don't need | |
3565 // to check anything else. The other steps are only needed during | |
3566 // the concurrent marking phase. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3567 if (!concurrent()) return; |
342 | 3568 |
3569 // (2) If marking has been aborted for Full GC, then we also abort. | |
3570 if (_cm->has_aborted()) { | |
3571 set_has_aborted(); | |
3572 statsOnly( ++_aborted_cm_aborted ); | |
3573 return; | |
3574 } | |
3575 | |
3576 double curr_time_ms = os::elapsedVTime() * 1000.0; | |
3577 | |
3578 // (3) If marking stats are enabled, then we update the step history. | |
3579 #if _MARKING_STATS_ | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3580 if (_words_scanned >= _words_scanned_limit) { |
342 | 3581 ++_clock_due_to_scanning; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3582 } |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3583 if (_refs_reached >= _refs_reached_limit) { |
342 | 3584 ++_clock_due_to_marking; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3585 } |
342 | 3586 |
3587 double last_interval_ms = curr_time_ms - _interval_start_time_ms; | |
3588 _interval_start_time_ms = curr_time_ms; | |
3589 _all_clock_intervals_ms.add(last_interval_ms); | |
3590 | |
3591 if (_cm->verbose_medium()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3592 gclog_or_tty->print_cr("[%d] regular clock, interval = %1.2lfms, " |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3593 "scanned = %d%s, refs reached = %d%s", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3594 _task_id, last_interval_ms, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3595 _words_scanned, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3596 (_words_scanned >= _words_scanned_limit) ? " (*)" : "", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3597 _refs_reached, |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3598 (_refs_reached >= _refs_reached_limit) ? " (*)" : ""); |
342 | 3599 } |
3600 #endif // _MARKING_STATS_ | |
3601 | |
3602 // (4) We check whether we should yield. If we have to, then we abort. | |
3603 if (_cm->should_yield()) { | |
3604 // We should yield. To do this we abort the task. The caller is | |
3605 // responsible for yielding. | |
3606 set_has_aborted(); | |
3607 statsOnly( ++_aborted_yield ); | |
3608 return; | |
3609 } | |
3610 | |
3611 // (5) We check whether we've reached our time quota. If we have, | |
3612 // then we abort. | |
3613 double elapsed_time_ms = curr_time_ms - _start_time_ms; | |
3614 if (elapsed_time_ms > _time_target_ms) { | |
3615 set_has_aborted(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3616 _has_timed_out = true; |
342 | 3617 statsOnly( ++_aborted_timed_out ); |
3618 return; | |
3619 } | |
3620 | |
3621 // (6) Finally, we check whether there are enough completed STAB | |
3622 // buffers available for processing. If there are, we abort. | |
3623 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3624 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
|
3625 if (_cm->verbose_low()) { |
342 | 3626 gclog_or_tty->print_cr("[%d] aborting to deal with pending SATB buffers", |
3627 _task_id); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3628 } |
342 | 3629 // we do need to process SATB buffers, we'll abort and restart |
3630 // the marking task to do so | |
3631 set_has_aborted(); | |
3632 statsOnly( ++_aborted_satb ); | |
3633 return; | |
3634 } | |
3635 } | |
3636 | |
3637 void CMTask::recalculate_limits() { | |
3638 _real_words_scanned_limit = _words_scanned + words_scanned_period; | |
3639 _words_scanned_limit = _real_words_scanned_limit; | |
3640 | |
3641 _real_refs_reached_limit = _refs_reached + refs_reached_period; | |
3642 _refs_reached_limit = _real_refs_reached_limit; | |
3643 } | |
3644 | |
3645 void CMTask::decrease_limits() { | |
3646 // This is called when we believe that we're going to do an infrequent | |
3647 // operation which will increase the per byte scanned cost (i.e. move | |
3648 // entries to/from the global stack). It basically tries to decrease the | |
3649 // scanning limit so that the clock is called earlier. | |
3650 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3651 if (_cm->verbose_medium()) { |
342 | 3652 gclog_or_tty->print_cr("[%d] decreasing limits", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3653 } |
342 | 3654 |
3655 _words_scanned_limit = _real_words_scanned_limit - | |
3656 3 * words_scanned_period / 4; | |
3657 _refs_reached_limit = _real_refs_reached_limit - | |
3658 3 * refs_reached_period / 4; | |
3659 } | |
3660 | |
3661 void CMTask::move_entries_to_global_stack() { | |
3662 // local array where we'll store the entries that will be popped | |
3663 // from the local queue | |
3664 oop buffer[global_stack_transfer_size]; | |
3665 | |
3666 int n = 0; | |
3667 oop obj; | |
3668 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) { | |
3669 buffer[n] = obj; | |
3670 ++n; | |
3671 } | |
3672 | |
3673 if (n > 0) { | |
3674 // we popped at least one entry from the local queue | |
3675 | |
3676 statsOnly( ++_global_transfers_to; _local_pops += n ); | |
3677 | |
3678 if (!_cm->mark_stack_push(buffer, n)) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3679 if (_cm->verbose_low()) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3680 gclog_or_tty->print_cr("[%d] aborting due to global stack overflow", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3681 _task_id); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3682 } |
342 | 3683 set_has_aborted(); |
3684 } else { | |
3685 // the transfer was successful | |
3686 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3687 if (_cm->verbose_medium()) { |
342 | 3688 gclog_or_tty->print_cr("[%d] pushed %d entries to the global stack", |
3689 _task_id, n); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3690 } |
342 | 3691 statsOnly( int tmp_size = _cm->mark_stack_size(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3692 if (tmp_size > _global_max_size) { |
342 | 3693 _global_max_size = tmp_size; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3694 } |
342 | 3695 _global_pushes += n ); |
3696 } | |
3697 } | |
3698 | |
3699 // this operation was quite expensive, so decrease the limits | |
3700 decrease_limits(); | |
3701 } | |
3702 | |
3703 void CMTask::get_entries_from_global_stack() { | |
3704 // local array where we'll store the entries that will be popped | |
3705 // from the global stack. | |
3706 oop buffer[global_stack_transfer_size]; | |
3707 int n; | |
3708 _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
|
3709 assert(n <= global_stack_transfer_size, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3710 "we should not pop more than the given limit"); |
342 | 3711 if (n > 0) { |
3712 // yes, we did actually pop at least one entry | |
3713 | |
3714 statsOnly( ++_global_transfers_from; _global_pops += n ); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3715 if (_cm->verbose_medium()) { |
342 | 3716 gclog_or_tty->print_cr("[%d] popped %d entries from the global stack", |
3717 _task_id, n); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3718 } |
342 | 3719 for (int i = 0; i < n; ++i) { |
3720 bool success = _task_queue->push(buffer[i]); | |
3721 // We only call this when the local queue is empty or under a | |
3722 // 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
|
3723 assert(success, "invariant"); |
342 | 3724 } |
3725 | |
3726 statsOnly( int tmp_size = _task_queue->size(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3727 if (tmp_size > _local_max_size) { |
342 | 3728 _local_max_size = tmp_size; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3729 } |
342 | 3730 _local_pushes += n ); |
3731 } | |
3732 | |
3733 // this operation was quite expensive, so decrease the limits | |
3734 decrease_limits(); | |
3735 } | |
3736 | |
3737 void CMTask::drain_local_queue(bool partially) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3738 if (has_aborted()) return; |
342 | 3739 |
3740 // Decide what the target size is, depending whether we're going to | |
3741 // drain it partially (so that other tasks can steal if they run out | |
3742 // of things to do) or totally (at the very end). | |
3743 size_t target_size; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3744 if (partially) { |
342 | 3745 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
|
3746 } else { |
342 | 3747 target_size = 0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3748 } |
342 | 3749 |
3750 if (_task_queue->size() > target_size) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3751 if (_cm->verbose_high()) { |
342 | 3752 gclog_or_tty->print_cr("[%d] draining local queue, target size = %d", |
3753 _task_id, target_size); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3754 } |
342 | 3755 |
3756 oop obj; | |
3757 bool ret = _task_queue->pop_local(obj); | |
3758 while (ret) { | |
3759 statsOnly( ++_local_pops ); | |
3760 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3761 if (_cm->verbose_high()) { |
342 | 3762 gclog_or_tty->print_cr("[%d] popped "PTR_FORMAT, _task_id, |
3763 (void*) obj); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3764 } |
342 | 3765 |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3766 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" ); |
2361 | 3767 assert(!_g1h->is_on_master_free_list( |
2152 | 3768 _g1h->heap_region_containing((HeapWord*) obj)), "invariant"); |
342 | 3769 |
3770 scan_object(obj); | |
3771 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3772 if (_task_queue->size() <= target_size || has_aborted()) { |
342 | 3773 ret = false; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3774 } else { |
342 | 3775 ret = _task_queue->pop_local(obj); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3776 } |
342 | 3777 } |
3778 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3779 if (_cm->verbose_high()) { |
342 | 3780 gclog_or_tty->print_cr("[%d] drained local queue, size = %d", |
3781 _task_id, _task_queue->size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3782 } |
342 | 3783 } |
3784 } | |
3785 | |
3786 void CMTask::drain_global_stack(bool partially) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3787 if (has_aborted()) return; |
342 | 3788 |
3789 // We have a policy to drain the local queue before we attempt to | |
3790 // drain the global stack. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3791 assert(partially || _task_queue->size() == 0, "invariant"); |
342 | 3792 |
3793 // Decide what the target size is, depending whether we're going to | |
3794 // drain it partially (so that other tasks can steal if they run out | |
3795 // of things to do) or totally (at the very end). Notice that, | |
3796 // because we move entries from the global stack in chunks or | |
3797 // because another task might be doing the same, we might in fact | |
3798 // drop below the target. But, this is not a problem. | |
3799 size_t target_size; | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3800 if (partially) { |
342 | 3801 target_size = _cm->partial_mark_stack_size_target(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3802 } else { |
342 | 3803 target_size = 0; |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3804 } |
342 | 3805 |
3806 if (_cm->mark_stack_size() > target_size) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3807 if (_cm->verbose_low()) { |
342 | 3808 gclog_or_tty->print_cr("[%d] draining global_stack, target size %d", |
3809 _task_id, target_size); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3810 } |
342 | 3811 |
3812 while (!has_aborted() && _cm->mark_stack_size() > target_size) { | |
3813 get_entries_from_global_stack(); | |
3814 drain_local_queue(partially); | |
3815 } | |
3816 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3817 if (_cm->verbose_low()) { |
342 | 3818 gclog_or_tty->print_cr("[%d] drained global stack, size = %d", |
3819 _task_id, _cm->mark_stack_size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3820 } |
342 | 3821 } |
3822 } | |
3823 | |
3824 // SATB Queue has several assumptions on whether to call the par or | |
3825 // non-par versions of the methods. this is why some of the code is | |
3826 // replicated. We should really get rid of the single-threaded version | |
3827 // of the code to simplify things. | |
3828 void CMTask::drain_satb_buffers() { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3829 if (has_aborted()) return; |
342 | 3830 |
3831 // We set this so that the regular clock knows that we're in the | |
3832 // middle of draining buffers and doesn't set the abort flag when it | |
3833 // notices that SATB buffers are available for draining. It'd be | |
3834 // very counter productive if it did that. :-) | |
3835 _draining_satb_buffers = true; | |
3836 | |
3837 CMObjectClosure oc(this); | |
3838 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3839 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3840 satb_mq_set.set_par_closure(_task_id, &oc); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3841 } else { |
342 | 3842 satb_mq_set.set_closure(&oc); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3843 } |
342 | 3844 |
3845 // This keeps claiming and applying the closure to completed buffers | |
3846 // 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
|
3847 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3848 while (!has_aborted() && |
3849 satb_mq_set.par_apply_closure_to_completed_buffer(_task_id)) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3850 if (_cm->verbose_medium()) { |
342 | 3851 gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3852 } |
342 | 3853 statsOnly( ++_satb_buffers_processed ); |
3854 regular_clock_call(); | |
3855 } | |
3856 } else { | |
3857 while (!has_aborted() && | |
3858 satb_mq_set.apply_closure_to_completed_buffer()) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3859 if (_cm->verbose_medium()) { |
342 | 3860 gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3861 } |
342 | 3862 statsOnly( ++_satb_buffers_processed ); |
3863 regular_clock_call(); | |
3864 } | |
3865 } | |
3866 | |
3867 if (!concurrent() && !has_aborted()) { | |
3868 // We should only do this during remark. | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3869 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3870 satb_mq_set.par_iterate_closure_all_threads(_task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3871 } else { |
342 | 3872 satb_mq_set.iterate_closure_all_threads(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3873 } |
342 | 3874 } |
3875 | |
3876 _draining_satb_buffers = false; | |
3877 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3878 assert(has_aborted() || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3879 concurrent() || |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3880 satb_mq_set.completed_buffers_num() == 0, "invariant"); |
342 | 3881 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3882 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3883 satb_mq_set.set_par_closure(_task_id, NULL); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3884 } else { |
342 | 3885 satb_mq_set.set_closure(NULL); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3886 } |
342 | 3887 |
3888 // again, this was a potentially expensive operation, decrease the | |
3889 // limits to get the regular clock call early | |
3890 decrease_limits(); | |
3891 } | |
3892 | |
3893 void CMTask::drain_region_stack(BitMapClosure* bc) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3894 if (has_aborted()) return; |
342 | 3895 |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3896 assert(_region_finger == NULL, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3897 "it should be NULL when we're not scanning a region"); |
342 | 3898 |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3899 if (!_cm->region_stack_empty() || !_aborted_region.is_empty()) { |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3900 if (_cm->verbose_low()) { |
342 | 3901 gclog_or_tty->print_cr("[%d] draining region stack, size = %d", |
3902 _task_id, _cm->region_stack_size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3903 } |
342 | 3904 |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3905 MemRegion mr; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3906 |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3907 if (!_aborted_region.is_empty()) { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3908 mr = _aborted_region; |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3909 _aborted_region = MemRegion(); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3910 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3911 if (_cm->verbose_low()) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3912 gclog_or_tty->print_cr("[%d] scanning aborted region " |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3913 "[ " PTR_FORMAT ", " PTR_FORMAT " )", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3914 _task_id, mr.start(), mr.end()); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3915 } |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3916 } else { |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3917 mr = _cm->region_stack_pop_lock_free(); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3918 // it returns MemRegion() if the pop fails |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3919 statsOnly(if (mr.start() != NULL) ++_region_stack_pops ); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3920 } |
342 | 3921 |
3922 while (mr.start() != NULL) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3923 if (_cm->verbose_medium()) { |
342 | 3924 gclog_or_tty->print_cr("[%d] we are scanning region " |
3925 "["PTR_FORMAT", "PTR_FORMAT")", | |
3926 _task_id, mr.start(), mr.end()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3927 } |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3928 |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3929 assert(mr.end() <= _cm->finger(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3930 "otherwise the region shouldn't be on the stack"); |
342 | 3931 assert(!mr.is_empty(), "Only non-empty regions live on the region stack"); |
3932 if (_nextMarkBitMap->iterate(bc, mr)) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3933 assert(!has_aborted(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3934 "cannot abort the task without aborting the bitmap iteration"); |
342 | 3935 |
3936 // We finished iterating over the region without aborting. | |
3937 regular_clock_call(); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3938 if (has_aborted()) { |
342 | 3939 mr = MemRegion(); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3940 } else { |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3941 mr = _cm->region_stack_pop_lock_free(); |
342 | 3942 // it returns MemRegion() if the pop fails |
3943 statsOnly(if (mr.start() != NULL) ++_region_stack_pops ); | |
3944 } | |
3945 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3946 assert(has_aborted(), "currently the only way to do so"); |
342 | 3947 |
3948 // The only way to abort the bitmap iteration is to return | |
3949 // false from the do_bit() method. However, inside the | |
3950 // do_bit() method we move the _region_finger to point to the | |
3951 // object currently being looked at. So, if we bail out, we | |
3952 // have definitely set _region_finger to something non-null. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3953 assert(_region_finger != NULL, "invariant"); |
342 | 3954 |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3955 // Make sure that any previously aborted region has been |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3956 // cleared. |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3957 assert(_aborted_region.is_empty(), "aborted region not cleared"); |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3958 |
342 | 3959 // The iteration was actually aborted. So now _region_finger |
3960 // points to the address of the object we last scanned. If we | |
3961 // leave it there, when we restart this task, we will rescan | |
3962 // the object. It is easy to avoid this. We move the finger by | |
3963 // enough to point to the next possible object header (the | |
3964 // bitmap knows by how much we need to move it as it knows its | |
3965 // granularity). | |
3966 MemRegion newRegion = | |
3967 MemRegion(_nextMarkBitMap->nextWord(_region_finger), mr.end()); | |
3968 | |
3969 if (!newRegion.is_empty()) { | |
3970 if (_cm->verbose_low()) { | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3971 gclog_or_tty->print_cr("[%d] recording unscanned region" |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3972 "[" PTR_FORMAT "," PTR_FORMAT ") in CMTask", |
342 | 3973 _task_id, |
3974 newRegion.start(), newRegion.end()); | |
3975 } | |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3976 // Now record the part of the region we didn't scan to |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3977 // make sure this task scans it later. |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3978 _aborted_region = newRegion; |
342 | 3979 } |
3980 // break from while | |
3981 mr = MemRegion(); | |
3982 } | |
3983 _region_finger = NULL; | |
3984 } | |
3985 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3986 if (_cm->verbose_low()) { |
342 | 3987 gclog_or_tty->print_cr("[%d] drained region stack, size = %d", |
3988 _task_id, _cm->region_stack_size()); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3989 } |
342 | 3990 } |
3991 } | |
3992 | |
3993 void CMTask::print_stats() { | |
3994 gclog_or_tty->print_cr("Marking Stats, task = %d, calls = %d", | |
3995 _task_id, _calls); | |
3996 gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms", | |
3997 _elapsed_time_ms, _termination_time_ms); | |
3998 gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
3999 _step_times_ms.num(), _step_times_ms.avg(), | |
4000 _step_times_ms.sd()); | |
4001 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
4002 _step_times_ms.maximum(), _step_times_ms.sum()); | |
4003 | |
4004 #if _MARKING_STATS_ | |
4005 gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
4006 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(), | |
4007 _all_clock_intervals_ms.sd()); | |
4008 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
4009 _all_clock_intervals_ms.maximum(), | |
4010 _all_clock_intervals_ms.sum()); | |
4011 gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d", | |
4012 _clock_due_to_scanning, _clock_due_to_marking); | |
4013 gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d", | |
4014 _objs_scanned, _objs_found_on_bitmap); | |
4015 gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d", | |
4016 _local_pushes, _local_pops, _local_max_size); | |
4017 gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d", | |
4018 _global_pushes, _global_pops, _global_max_size); | |
4019 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d", | |
4020 _global_transfers_to,_global_transfers_from); | |
4021 gclog_or_tty->print_cr(" Regions: claimed = %d, Region Stack: pops = %d", | |
4022 _regions_claimed, _region_stack_pops); | |
4023 gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed); | |
4024 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d", | |
4025 _steal_attempts, _steals); | |
4026 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted); | |
4027 gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d", | |
4028 _aborted_overflow, _aborted_cm_aborted, _aborted_yield); | |
4029 gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d", | |
4030 _aborted_timed_out, _aborted_satb, _aborted_termination); | |
4031 #endif // _MARKING_STATS_ | |
4032 } | |
4033 | |
4034 /***************************************************************************** | |
4035 | |
4036 The do_marking_step(time_target_ms) method is the building block | |
4037 of the parallel marking framework. It can be called in parallel | |
4038 with other invocations of do_marking_step() on different tasks | |
4039 (but only one per task, obviously) and concurrently with the | |
4040 mutator threads, or during remark, hence it eliminates the need | |
4041 for two versions of the code. When called during remark, it will | |
4042 pick up from where the task left off during the concurrent marking | |
4043 phase. Interestingly, tasks are also claimable during evacuation | |
4044 pauses too, since do_marking_step() ensures that it aborts before | |
4045 it needs to yield. | |
4046 | |
4047 The data structures that is uses to do marking work are the | |
4048 following: | |
4049 | |
4050 (1) Marking Bitmap. If there are gray objects that appear only | |
4051 on the bitmap (this happens either when dealing with an overflow | |
4052 or when the initial marking phase has simply marked the roots | |
4053 and didn't push them on the stack), then tasks claim heap | |
4054 regions whose bitmap they then scan to find gray objects. A | |
4055 global finger indicates where the end of the last claimed region | |
4056 is. A local finger indicates how far into the region a task has | |
4057 scanned. The two fingers are used to determine how to gray an | |
4058 object (i.e. whether simply marking it is OK, as it will be | |
4059 visited by a task in the future, or whether it needs to be also | |
4060 pushed on a stack). | |
4061 | |
4062 (2) Local Queue. The local queue of the task which is accessed | |
4063 reasonably efficiently by the task. Other tasks can steal from | |
4064 it when they run out of work. Throughout the marking phase, a | |
4065 task attempts to keep its local queue short but not totally | |
4066 empty, so that entries are available for stealing by other | |
4067 tasks. Only when there is no more work, a task will totally | |
4068 drain its local queue. | |
4069 | |
4070 (3) Global Mark Stack. This handles local queue overflow. During | |
4071 marking only sets of entries are moved between it and the local | |
4072 queues, as access to it requires a mutex and more fine-grain | |
4073 interaction with it which might cause contention. If it | |
4074 overflows, then the marking phase should restart and iterate | |
4075 over the bitmap to identify gray objects. Throughout the marking | |
4076 phase, tasks attempt to keep the global mark stack at a small | |
4077 length but not totally empty, so that entries are available for | |
4078 popping by other tasks. Only when there is no more work, tasks | |
4079 will totally drain the global mark stack. | |
4080 | |
4081 (4) Global Region Stack. Entries on it correspond to areas of | |
4082 the bitmap that need to be scanned since they contain gray | |
4083 objects. Pushes on the region stack only happen during | |
4084 evacuation pauses and typically correspond to areas covered by | |
4085 GC LABS. If it overflows, then the marking phase should restart | |
4086 and iterate over the bitmap to identify gray objects. Tasks will | |
4087 try to totally drain the region stack as soon as possible. | |
4088 | |
4089 (5) SATB Buffer Queue. This is where completed SATB buffers are | |
4090 made available. Buffers are regularly removed from this queue | |
4091 and scanned for roots, so that the queue doesn't get too | |
4092 long. During remark, all completed buffers are processed, as | |
4093 well as the filled in parts of any uncompleted buffers. | |
4094 | |
4095 The do_marking_step() method tries to abort when the time target | |
4096 has been reached. There are a few other cases when the | |
4097 do_marking_step() method also aborts: | |
4098 | |
4099 (1) When the marking phase has been aborted (after a Full GC). | |
4100 | |
4101 (2) When a global overflow (either on the global stack or the | |
4102 region stack) has been triggered. Before the task aborts, it | |
4103 will actually sync up with the other tasks to ensure that all | |
4104 the marking data structures (local queues, stacks, fingers etc.) | |
4105 are re-initialised so that when do_marking_step() completes, | |
4106 the marking phase can immediately restart. | |
4107 | |
4108 (3) When enough completed SATB buffers are available. The | |
4109 do_marking_step() method only tries to drain SATB buffers right | |
4110 at the beginning. So, if enough buffers are available, the | |
4111 marking step aborts and the SATB buffers are processed at | |
4112 the beginning of the next invocation. | |
4113 | |
4114 (4) To yield. when we have to yield then we abort and yield | |
4115 right at the end of do_marking_step(). This saves us from a lot | |
4116 of hassle as, by yielding we might allow a Full GC. If this | |
4117 happens then objects will be compacted underneath our feet, the | |
4118 heap might shrink, etc. We save checking for this by just | |
4119 aborting and doing the yield right at the end. | |
4120 | |
4121 From the above it follows that the do_marking_step() method should | |
4122 be called in a loop (or, otherwise, regularly) until it completes. | |
4123 | |
4124 If a marking step completes without its has_aborted() flag being | |
4125 true, it means it has completed the current marking phase (and | |
4126 also all other marking tasks have done so and have all synced up). | |
4127 | |
4128 A method called regular_clock_call() is invoked "regularly" (in | |
4129 sub ms intervals) throughout marking. It is this clock method that | |
4130 checks all the abort conditions which were mentioned above and | |
4131 decides when the task should abort. A work-based scheme is used to | |
4132 trigger this clock method: when the number of object words the | |
4133 marking phase has scanned or the number of references the marking | |
4134 phase has visited reach a given limit. Additional invocations to | |
4135 the method clock have been planted in a few other strategic places | |
4136 too. The initial reason for the clock method was to avoid calling | |
4137 vtime too regularly, as it is quite expensive. So, once it was in | |
4138 place, it was natural to piggy-back all the other conditions on it | |
4139 too and not constantly check them throughout the code. | |
4140 | |
4141 *****************************************************************************/ | |
4142 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4143 void CMTask::do_marking_step(double time_target_ms, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4144 bool do_stealing, |
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4145 bool do_termination) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4146 assert(time_target_ms >= 1.0, "minimum granularity is 1ms"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4147 assert(concurrent() == _cm->concurrent(), "they should be the same"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4148 |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4149 assert(concurrent() || _cm->region_stack_empty(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4150 "the region stack should have been cleared before remark"); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
4151 assert(concurrent() || !_cm->has_aborted_regions(), |
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
4152 "aborted regions should have been cleared before remark"); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4153 assert(_region_finger == NULL, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4154 "this should be non-null only when a region is being scanned"); |
342 | 4155 |
4156 G1CollectorPolicy* g1_policy = _g1h->g1_policy(); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4157 assert(_task_queues != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4158 assert(_task_queue != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4159 assert(_task_queues->queue(_task_id) == _task_queue, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4160 |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4161 assert(!_claimed, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4162 "only one thread should claim this task at any one time"); |
342 | 4163 |
4164 // OK, this doesn't safeguard again all possible scenarios, as it is | |
4165 // possible for two threads to set the _claimed flag at the same | |
4166 // time. But it is only for debugging purposes anyway and it will | |
4167 // catch most problems. | |
4168 _claimed = true; | |
4169 | |
4170 _start_time_ms = os::elapsedVTime() * 1000.0; | |
4171 statsOnly( _interval_start_time_ms = _start_time_ms ); | |
4172 | |
4173 double diff_prediction_ms = | |
4174 g1_policy->get_new_prediction(&_marking_step_diffs_ms); | |
4175 _time_target_ms = time_target_ms - diff_prediction_ms; | |
4176 | |
4177 // set up the variables that are used in the work-based scheme to | |
4178 // call the regular clock method | |
4179 _words_scanned = 0; | |
4180 _refs_reached = 0; | |
4181 recalculate_limits(); | |
4182 | |
4183 // clear all flags | |
4184 clear_has_aborted(); | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4185 _has_timed_out = false; |
342 | 4186 _draining_satb_buffers = false; |
4187 | |
4188 ++_calls; | |
4189 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4190 if (_cm->verbose_low()) { |
342 | 4191 gclog_or_tty->print_cr("[%d] >>>>>>>>>> START, call = %d, " |
4192 "target = %1.2lfms >>>>>>>>>>", | |
4193 _task_id, _calls, _time_target_ms); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4194 } |
342 | 4195 |
4196 // Set up the bitmap and oop closures. Anything that uses them is | |
4197 // eventually called from this method, so it is OK to allocate these | |
4198 // statically. | |
4199 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap); | |
3771 | 4200 G1CMOopClosure cm_oop_closure(_g1h, _cm, this); |
4201 set_cm_oop_closure(&cm_oop_closure); | |
342 | 4202 |
4203 if (_cm->has_overflown()) { | |
4204 // This can happen if the region stack or the mark stack overflows | |
4205 // during a GC pause and this task, after a yield point, | |
4206 // restarts. We have to abort as we need to get into the overflow | |
4207 // protocol which happens right at the end of this task. | |
4208 set_has_aborted(); | |
4209 } | |
4210 | |
4211 // First drain any available SATB buffers. After this, we will not | |
4212 // look at SATB buffers before the next invocation of this method. | |
4213 // If enough completed SATB buffers are queued up, the regular clock | |
4214 // will abort this task so that it restarts. | |
4215 drain_satb_buffers(); | |
4216 // ...then partially drain the local queue and the global stack | |
4217 drain_local_queue(true); | |
4218 drain_global_stack(true); | |
4219 | |
4220 // Then totally drain the region stack. We will not look at | |
4221 // it again before the next invocation of this method. Entries on | |
4222 // the region stack are only added during evacuation pauses, for | |
4223 // which we have to yield. When we do, we abort the task anyway so | |
4224 // it will look at the region stack again when it restarts. | |
4225 bitmap_closure.set_scanning_heap_region(false); | |
4226 drain_region_stack(&bitmap_closure); | |
4227 // ...then partially drain the local queue and the global stack | |
4228 drain_local_queue(true); | |
4229 drain_global_stack(true); | |
4230 | |
4231 do { | |
4232 if (!has_aborted() && _curr_region != NULL) { | |
4233 // 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
|
4234 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
|
4235 "should not be NULL either"); |
342 | 4236 |
4237 // We might have restarted this task after an evacuation pause | |
4238 // which might have evacuated the region we're holding on to | |
4239 // underneath our feet. Let's read its limit again to make sure | |
4240 // that we do not iterate over a region of the heap that | |
4241 // contains garbage (update_region_limit() will also move | |
4242 // _finger to the start of the region if it is found empty). | |
4243 update_region_limit(); | |
4244 // We will start from _finger not from the start of the region, | |
4245 // as we might be restarting this task after aborting half-way | |
4246 // through scanning this region. In this case, _finger points to | |
4247 // the address where we last found a marked object. If this is a | |
4248 // fresh region, _finger points to start(). | |
4249 MemRegion mr = MemRegion(_finger, _region_limit); | |
4250 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4251 if (_cm->verbose_low()) { |
342 | 4252 gclog_or_tty->print_cr("[%d] we're scanning part " |
4253 "["PTR_FORMAT", "PTR_FORMAT") " | |
4254 "of region "PTR_FORMAT, | |
4255 _task_id, _finger, _region_limit, _curr_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4256 } |
342 | 4257 |
4258 // Let's iterate over the bitmap of the part of the | |
4259 // region that is left. | |
4260 bitmap_closure.set_scanning_heap_region(true); | |
4261 if (mr.is_empty() || | |
4262 _nextMarkBitMap->iterate(&bitmap_closure, mr)) { | |
4263 // We successfully completed iterating over the region. Now, | |
4264 // let's give up the region. | |
4265 giveup_current_region(); | |
4266 regular_clock_call(); | |
4267 } else { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4268 assert(has_aborted(), "currently the only way to do so"); |
342 | 4269 // The only way to abort the bitmap iteration is to return |
4270 // false from the do_bit() method. However, inside the | |
4271 // do_bit() method we move the _finger to point to the | |
4272 // object currently being looked at. So, if we bail out, we | |
4273 // have definitely set _finger to something non-null. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4274 assert(_finger != NULL, "invariant"); |
342 | 4275 |
4276 // Region iteration was actually aborted. So now _finger | |
4277 // points to the address of the object we last scanned. If we | |
4278 // leave it there, when we restart this task, we will rescan | |
4279 // the object. It is easy to avoid this. We move the finger by | |
4280 // enough to point to the next possible object header (the | |
4281 // bitmap knows by how much we need to move it as it knows its | |
4282 // granularity). | |
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4283 assert(_finger < _region_limit, "invariant"); |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4284 HeapWord* new_finger = _nextMarkBitMap->nextWord(_finger); |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4285 // 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
|
4286 if (new_finger >= _region_limit) { |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4287 giveup_current_region(); |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4288 } else { |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4289 move_finger_to(new_finger); |
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4290 } |
342 | 4291 } |
4292 } | |
4293 // At this point we have either completed iterating over the | |
4294 // region we were holding on to, or we have aborted. | |
4295 | |
4296 // We then partially drain the local queue and the global stack. | |
4297 // (Do we really need this?) | |
4298 drain_local_queue(true); | |
4299 drain_global_stack(true); | |
4300 | |
4301 // Read the note on the claim_region() method on why it might | |
4302 // return NULL with potentially more regions available for | |
4303 // claiming and why we have to check out_of_regions() to determine | |
4304 // whether we're done or not. | |
4305 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) { | |
4306 // We are going to try to claim a new region. We should have | |
4307 // given up on the previous one. | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4308 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4309 assert(_curr_region == NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4310 assert(_finger == NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4311 assert(_region_limit == NULL, "invariant"); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4312 if (_cm->verbose_low()) { |
342 | 4313 gclog_or_tty->print_cr("[%d] trying to claim a new region", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4314 } |
342 | 4315 HeapRegion* claimed_region = _cm->claim_region(_task_id); |
4316 if (claimed_region != NULL) { | |
4317 // Yes, we managed to claim one | |
4318 statsOnly( ++_regions_claimed ); | |
4319 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4320 if (_cm->verbose_low()) { |
342 | 4321 gclog_or_tty->print_cr("[%d] we successfully claimed " |
4322 "region "PTR_FORMAT, | |
4323 _task_id, claimed_region); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4324 } |
342 | 4325 |
4326 setup_for_region(claimed_region); | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4327 assert(_curr_region == claimed_region, "invariant"); |
342 | 4328 } |
4329 // It is important to call the regular clock here. It might take | |
4330 // a while to claim a region if, for example, we hit a large | |
4331 // block of empty regions. So we need to call the regular clock | |
4332 // method once round the loop to make sure it's called | |
4333 // frequently enough. | |
4334 regular_clock_call(); | |
4335 } | |
4336 | |
4337 if (!has_aborted() && _curr_region == NULL) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4338 assert(_cm->out_of_regions(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4339 "at this point we should be out of regions"); |
342 | 4340 } |
4341 } while ( _curr_region != NULL && !has_aborted()); | |
4342 | |
4343 if (!has_aborted()) { | |
4344 // We cannot check whether the global stack is empty, since other | |
343
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4345 // tasks might be pushing objects to it concurrently. We also cannot |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4346 // check if the region stack is empty because if a thread is aborting |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4347 // it can push a partially done region back. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4348 assert(_cm->out_of_regions(), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4349 "at this point we should be out of regions"); |
342 | 4350 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4351 if (_cm->verbose_low()) { |
342 | 4352 gclog_or_tty->print_cr("[%d] all regions claimed", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4353 } |
342 | 4354 |
4355 // Try to reduce the number of available SATB buffers so that | |
4356 // remark has less work to do. | |
4357 drain_satb_buffers(); | |
4358 } | |
4359 | |
4360 // Since we've done everything else, we can now totally drain the | |
4361 // local queue and global stack. | |
4362 drain_local_queue(false); | |
4363 drain_global_stack(false); | |
4364 | |
4365 // Attempt at work stealing from other task's queues. | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4366 if (do_stealing && !has_aborted()) { |
342 | 4367 // We have not aborted. This means that we have finished all that |
4368 // we could. Let's try to do some stealing... | |
4369 | |
4370 // We cannot check whether the global stack is empty, since other | |
343
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4371 // tasks might be pushing objects to it concurrently. We also cannot |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4372 // check if the region stack is empty because if a thread is aborting |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4373 // it can push a partially done region back. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4374 assert(_cm->out_of_regions() && _task_queue->size() == 0, |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4375 "only way to reach here"); |
342 | 4376 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4377 if (_cm->verbose_low()) { |
342 | 4378 gclog_or_tty->print_cr("[%d] starting to steal", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4379 } |
342 | 4380 |
4381 while (!has_aborted()) { | |
4382 oop obj; | |
4383 statsOnly( ++_steal_attempts ); | |
4384 | |
4385 if (_cm->try_stealing(_task_id, &_hash_seed, obj)) { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4386 if (_cm->verbose_medium()) { |
342 | 4387 gclog_or_tty->print_cr("[%d] stolen "PTR_FORMAT" successfully", |
4388 _task_id, (void*) obj); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4389 } |
342 | 4390 |
4391 statsOnly( ++_steals ); | |
4392 | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4393 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4394 "any stolen object should be marked"); |
342 | 4395 scan_object(obj); |
4396 | |
4397 // And since we're towards the end, let's totally drain the | |
4398 // local queue and global stack. | |
4399 drain_local_queue(false); | |
4400 drain_global_stack(false); | |
4401 } else { | |
4402 break; | |
4403 } | |
4404 } | |
4405 } | |
4406 | |
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4407 // 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
|
4408 // 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
|
4409 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
|
4410 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
|
4411 _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
|
4412 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
|
4413 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4414 } |
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4415 |
342 | 4416 // We still haven't aborted. Now, let's try to get into the |
4417 // termination protocol. | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4418 if (do_termination && !has_aborted()) { |
342 | 4419 // We cannot check whether the global stack is empty, since other |
343
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4420 // tasks might be concurrently pushing objects on it. We also cannot |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4421 // check if the region stack is empty because if a thread is aborting |
afc1ce1efe66
6710665: G1: guarantee(_cm->out_of_regions() && _cm->region_stack_empty() && _task_queue->size() == 0, ...)
iveresov
parents:
342
diff
changeset
|
4422 // it can push a partially done region back. |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4423 // Separated the asserts so that we know which one fires. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4424 assert(_cm->out_of_regions(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4425 assert(_task_queue->size() == 0, "only way to reach here"); |
342 | 4426 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4427 if (_cm->verbose_low()) { |
342 | 4428 gclog_or_tty->print_cr("[%d] starting termination protocol", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4429 } |
342 | 4430 |
4431 _termination_start_time_ms = os::elapsedVTime() * 1000.0; | |
4432 // The CMTask class also extends the TerminatorTerminator class, | |
4433 // hence its should_exit_termination() method will also decide | |
4434 // whether to exit the termination protocol or not. | |
4435 bool finished = _cm->terminator()->offer_termination(this); | |
4436 double termination_end_time_ms = os::elapsedVTime() * 1000.0; | |
4437 _termination_time_ms += | |
4438 termination_end_time_ms - _termination_start_time_ms; | |
4439 | |
4440 if (finished) { | |
4441 // We're all done. | |
4442 | |
4443 if (_task_id == 0) { | |
4444 // let's allow task 0 to do this | |
4445 if (concurrent()) { | |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4446 assert(_cm->concurrent_marking_in_progress(), "invariant"); |
342 | 4447 // we need to set this to false before the next |
4448 // safepoint. This way we ensure that the marking phase | |
4449 // doesn't observe any more heap expansions. | |
4450 _cm->clear_concurrent_marking_in_progress(); | |
4451 } | |
4452 } | |
4453 | |
4454 // 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
|
4455 // all other tasks have finished. We separated the guarantees so |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4456 // 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
|
4457 // which one. |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4458 guarantee(_cm->out_of_regions(), "only way to reach here"); |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
4459 guarantee(_aborted_region.is_empty(), "only way to reach here"); |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4460 guarantee(_cm->region_stack_empty(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4461 guarantee(_cm->mark_stack_empty(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4462 guarantee(_task_queue->size() == 0, "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4463 guarantee(!_cm->has_overflown(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4464 guarantee(!_cm->mark_stack_overflow(), "only way to reach here"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4465 guarantee(!_cm->region_stack_overflow(), "only way to reach here"); |
342 | 4466 |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4467 if (_cm->verbose_low()) { |
342 | 4468 gclog_or_tty->print_cr("[%d] all tasks terminated", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4469 } |
342 | 4470 } else { |
4471 // Apparently there's more work to do. Let's abort this task. It | |
4472 // will restart it and we can hopefully find more things to do. | |
4473 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4474 if (_cm->verbose_low()) { |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4475 gclog_or_tty->print_cr("[%d] apparently there is more work to do", |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4476 _task_id); |
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4477 } |
342 | 4478 |
4479 set_has_aborted(); | |
4480 statsOnly( ++_aborted_termination ); | |
4481 } | |
4482 } | |
4483 | |
4484 // Mainly for debugging purposes to make sure that a pointer to the | |
4485 // closure which was statically allocated in this frame doesn't | |
4486 // escape it by accident. | |
3771 | 4487 set_cm_oop_closure(NULL); |
342 | 4488 double end_time_ms = os::elapsedVTime() * 1000.0; |
4489 double elapsed_time_ms = end_time_ms - _start_time_ms; | |
4490 // Update the step history. | |
4491 _step_times_ms.add(elapsed_time_ms); | |
4492 | |
4493 if (has_aborted()) { | |
4494 // The task was aborted for some reason. | |
4495 | |
4496 statsOnly( ++_aborted ); | |
4497 | |
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4498 if (_has_timed_out) { |
342 | 4499 double diff_ms = elapsed_time_ms - _time_target_ms; |
4500 // Keep statistics of how well we did with respect to hitting | |
4501 // our target only if we actually timed out (if we aborted for | |
4502 // other reasons, then the results might get skewed). | |
4503 _marking_step_diffs_ms.add(diff_ms); | |
4504 } | |
4505 | |
4506 if (_cm->has_overflown()) { | |
4507 // This is the interesting one. We aborted because a global | |
4508 // overflow was raised. This means we have to restart the | |
4509 // marking phase and start iterating over regions. However, in | |
4510 // order to do this we have to make sure that all tasks stop | |
4511 // what they are doing and re-initialise in a safe manner. We | |
4512 // will achieve this with the use of two barrier sync points. | |
4513 | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4514 if (_cm->verbose_low()) { |
342 | 4515 gclog_or_tty->print_cr("[%d] detected overflow", _task_id); |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4516 } |
342 | 4517 |
4518 _cm->enter_first_sync_barrier(_task_id); | |
4519 // When we exit this sync barrier we know that all tasks have | |
4520 // stopped doing marking work. So, it's now safe to | |
4521 // re-initialise our data structures. At the end of this method, | |
4522 // task 0 will clear the global data structures. | |
4523 | |
4524 statsOnly( ++_aborted_overflow ); | |
4525 | |
4526 // We clear the local state of this task... | |
4527 clear_region_fields(); | |
4528 | |
4529 // ...and enter the second barrier. | |
4530 _cm->enter_second_sync_barrier(_task_id); | |
4531 // At this point everything has bee re-initialised and we're | |
4532 // ready to restart. | |
4533 } | |
4534 | |
4535 if (_cm->verbose_low()) { | |
4536 gclog_or_tty->print_cr("[%d] <<<<<<<<<< ABORTING, target = %1.2lfms, " | |
4537 "elapsed = %1.2lfms <<<<<<<<<<", | |
4538 _task_id, _time_target_ms, elapsed_time_ms); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4539 if (_cm->has_aborted()) { |
342 | 4540 gclog_or_tty->print_cr("[%d] ========== MARKING ABORTED ==========", |
4541 _task_id); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4542 } |
342 | 4543 } |
4544 } else { | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4545 if (_cm->verbose_low()) { |
342 | 4546 gclog_or_tty->print_cr("[%d] <<<<<<<<<< FINISHED, target = %1.2lfms, " |
4547 "elapsed = %1.2lfms <<<<<<<<<<", | |
4548 _task_id, _time_target_ms, elapsed_time_ms); | |
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4549 } |
342 | 4550 } |
4551 | |
4552 _claimed = false; | |
4553 } | |
4554 | |
4555 CMTask::CMTask(int task_id, | |
4556 ConcurrentMark* cm, | |
4557 CMTaskQueue* task_queue, | |
4558 CMTaskQueueSet* task_queues) | |
4559 : _g1h(G1CollectedHeap::heap()), | |
4560 _task_id(task_id), _cm(cm), | |
4561 _claimed(false), | |
4562 _nextMarkBitMap(NULL), _hash_seed(17), | |
4563 _task_queue(task_queue), | |
4564 _task_queues(task_queues), | |
3771 | 4565 _cm_oop_closure(NULL), |
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
4566 _aborted_region(MemRegion()) { |
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4567 guarantee(task_queue != NULL, "invariant"); |
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4568 guarantee(task_queues != NULL, "invariant"); |
342 | 4569 |
4570 statsOnly( _clock_due_to_scanning = 0; | |
4571 _clock_due_to_marking = 0 ); | |
4572 | |
4573 _marking_step_diffs_ms.add(0.5); | |
4574 } | |
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4575 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4576 // 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
|
4577 // 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
|
4578 // 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
|
4579 // 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
|
4580 // 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
|
4581 // 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
|
4582 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4583 // 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
|
4584 // 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
|
4585 #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
|
4586 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4587 #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
|
4588 #ifdef _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4589 #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
|
4590 #else // _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4591 #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
|
4592 #endif // _LP64 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4593 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4594 // 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
|
4595 #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
|
4596 #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
|
4597 #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
|
4598 #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
|
4599 #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
|
4600 #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
|
4601 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4602 // 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
|
4603 #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
|
4604 #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
|
4605 #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
|
4606 #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
|
4607 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4608 G1PrintRegionLivenessInfoClosure:: |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4609 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
|
4610 : _out(out), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4611 _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
|
4612 _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
|
4613 _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
|
4614 _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
|
4615 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
|
4616 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
|
4617 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
|
4618 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
|
4619 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4620 // 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
|
4621 _out->cr(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4622 _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
|
4623 _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
|
4624 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
|
4625 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
|
4626 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
|
4627 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
|
4628 g1_reserved.start(), g1_reserved.end(), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4629 HeapRegion::GrainBytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4630 _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
|
4631 _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
|
4632 G1PPRL_TYPE_H_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4633 G1PPRL_ADDR_BASE_H_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4634 G1PPRL_BYTE_H_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4635 G1PPRL_BYTE_H_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4636 G1PPRL_BYTE_H_FORMAT |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4637 G1PPRL_DOUBLE_H_FORMAT, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4638 "type", "address-range", |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4639 "used", "prev-live", "next-live", "gc-eff"); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4640 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4641 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4642 // 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
|
4643 // 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
|
4644 // 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
|
4645 // 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
|
4646 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
|
4647 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
|
4648 // 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
|
4649 // 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
|
4650 if (*hum_bytes > 0) { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4651 bytes = MIN2((size_t) HeapRegion::GrainBytes, *hum_bytes); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4652 *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
|
4653 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4654 return bytes; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4655 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4656 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4657 // 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
|
4658 // 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
|
4659 // 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
|
4660 // 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
|
4661 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
|
4662 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
|
4663 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
|
4664 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
|
4665 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
|
4666 *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
|
4667 *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
|
4668 *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
|
4669 *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
|
4670 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4671 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4672 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
|
4673 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
|
4674 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
|
4675 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
|
4676 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
|
4677 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
|
4678 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
|
4679 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
|
4680 double gc_eff = r->gc_efficiency(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4681 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
|
4682 type = "FREE"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4683 } 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
|
4684 type = "SURV"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4685 } 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
|
4686 type = "EDEN"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4687 } 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
|
4688 type = "HUMS"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4689 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4690 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
|
4691 _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
|
4692 "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
|
4693 // 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
|
4694 _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
|
4695 _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
|
4696 _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
|
4697 _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
|
4698 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
|
4699 &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
|
4700 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
|
4701 } 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
|
4702 type = "HUMC"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4703 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
|
4704 &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
|
4705 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
|
4706 } else { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4707 type = "OLD"; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4708 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4709 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4710 _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
|
4711 _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
|
4712 _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
|
4713 _total_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
|
4714 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4715 // 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
|
4716 _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
|
4717 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
|
4718 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
|
4719 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
|
4720 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
|
4721 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
|
4722 G1PPRL_DOUBLE_FORMAT, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4723 type, bottom, end, |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4724 used_bytes, prev_live_bytes, next_live_bytes, gc_eff); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4725 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4726 return false; |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4727 } |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4728 |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4729 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() { |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4730 // 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
|
4731 _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
|
4732 _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
|
4733 " SUMMARY" |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4734 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
|
4735 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
|
4736 G1PPRL_SUM_MB_PERC_FORMAT("prev-live") |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4737 G1PPRL_SUM_MB_PERC_FORMAT("next-live"), |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4738 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
|
4739 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
|
4740 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
|
4741 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
|
4742 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
|
4743 bytes_to_mb(_total_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
|
4744 perc(_total_next_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
|
4745 _out->cr(); |
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4746 } |