Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 2125:7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
Summary: Make JvmtiGCMark safe to run non-safepoint and instrument CMS
Reviewed-by: ysr, dcubed
author | kamg |
---|---|
date | Mon, 10 Jan 2011 17:14:53 -0500 |
parents | f95d63e2154a |
children | 9afee0b9fc1d |
rev | line source |
---|---|
0 | 1 /* |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1489
diff
changeset
|
2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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:
1489
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1489
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:
1489
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/symbolTable.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "code/codeCache.hpp" | |
29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
30 #include "gc_implementation/parallelScavenge/generationSizer.hpp" | |
31 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" | |
32 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
33 #include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp" | |
34 #include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp" | |
35 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" | |
36 #include "gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp" | |
37 #include "gc_implementation/parallelScavenge/psOldGen.hpp" | |
38 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" | |
39 #include "gc_implementation/parallelScavenge/psPermGen.hpp" | |
40 #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" | |
41 #include "gc_implementation/parallelScavenge/psScavenge.hpp" | |
42 #include "gc_implementation/parallelScavenge/psYoungGen.hpp" | |
43 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
44 #include "gc_interface/gcCause.hpp" | |
45 #include "memory/gcLocker.inline.hpp" | |
46 #include "memory/referencePolicy.hpp" | |
47 #include "memory/referenceProcessor.hpp" | |
48 #include "oops/methodDataOop.hpp" | |
49 #include "oops/oop.inline.hpp" | |
50 #include "oops/oop.pcgc.inline.hpp" | |
51 #include "runtime/fprofiler.hpp" | |
52 #include "runtime/safepoint.hpp" | |
53 #include "runtime/vmThread.hpp" | |
54 #include "services/management.hpp" | |
55 #include "services/memoryService.hpp" | |
56 #include "utilities/events.hpp" | |
57 #include "utilities/stack.inline.hpp" | |
0 | 58 |
59 #include <math.h> | |
60 | |
61 // All sizes are in HeapWords. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
62 const size_t ParallelCompactData::Log2RegionSize = 9; // 512 words |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
63 const size_t ParallelCompactData::RegionSize = (size_t)1 << Log2RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
64 const size_t ParallelCompactData::RegionSizeBytes = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
65 RegionSize << LogHeapWordSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
66 const size_t ParallelCompactData::RegionSizeOffsetMask = RegionSize - 1; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
67 const size_t ParallelCompactData::RegionAddrOffsetMask = RegionSizeBytes - 1; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
68 const size_t ParallelCompactData::RegionAddrMask = ~RegionAddrOffsetMask; |
0 | 69 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
70 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
71 ParallelCompactData::RegionData::dc_shift = 27; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
72 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
73 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
74 ParallelCompactData::RegionData::dc_mask = ~0U << dc_shift; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
75 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
76 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
77 ParallelCompactData::RegionData::dc_one = 0x1U << dc_shift; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
78 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
79 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
80 ParallelCompactData::RegionData::los_mask = ~dc_mask; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
81 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
82 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
83 ParallelCompactData::RegionData::dc_claimed = 0x8U << dc_shift; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
84 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
85 const ParallelCompactData::RegionData::region_sz_t |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
86 ParallelCompactData::RegionData::dc_completed = 0xcU << dc_shift; |
0 | 87 |
88 SpaceInfo PSParallelCompact::_space_info[PSParallelCompact::last_space_id]; | |
89 bool PSParallelCompact::_print_phases = false; | |
90 | |
91 ReferenceProcessor* PSParallelCompact::_ref_processor = NULL; | |
92 klassOop PSParallelCompact::_updated_int_array_klass_obj = NULL; | |
93 | |
94 double PSParallelCompact::_dwl_mean; | |
95 double PSParallelCompact::_dwl_std_dev; | |
96 double PSParallelCompact::_dwl_first_term; | |
97 double PSParallelCompact::_dwl_adjustment; | |
98 #ifdef ASSERT | |
99 bool PSParallelCompact::_dwl_initialized = false; | |
100 #endif // #ifdef ASSERT | |
101 | |
102 #ifdef VALIDATE_MARK_SWEEP | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
103 GrowableArray<void*>* PSParallelCompact::_root_refs_stack = NULL; |
0 | 104 GrowableArray<oop> * PSParallelCompact::_live_oops = NULL; |
105 GrowableArray<oop> * PSParallelCompact::_live_oops_moved_to = NULL; | |
106 GrowableArray<size_t>* PSParallelCompact::_live_oops_size = NULL; | |
107 size_t PSParallelCompact::_live_oops_index = 0; | |
108 size_t PSParallelCompact::_live_oops_index_at_perm = 0; | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
109 GrowableArray<void*>* PSParallelCompact::_other_refs_stack = NULL; |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
110 GrowableArray<void*>* PSParallelCompact::_adjusted_pointers = NULL; |
0 | 111 bool PSParallelCompact::_pointer_tracking = false; |
112 bool PSParallelCompact::_root_tracking = true; | |
113 | |
114 GrowableArray<HeapWord*>* PSParallelCompact::_cur_gc_live_oops = NULL; | |
115 GrowableArray<HeapWord*>* PSParallelCompact::_cur_gc_live_oops_moved_to = NULL; | |
116 GrowableArray<size_t> * PSParallelCompact::_cur_gc_live_oops_size = NULL; | |
117 GrowableArray<HeapWord*>* PSParallelCompact::_last_gc_live_oops = NULL; | |
118 GrowableArray<HeapWord*>* PSParallelCompact::_last_gc_live_oops_moved_to = NULL; | |
119 GrowableArray<size_t> * PSParallelCompact::_last_gc_live_oops_size = NULL; | |
120 #endif | |
121 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
122 void SplitInfo::record(size_t src_region_idx, size_t partial_obj_size, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
123 HeapWord* destination) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
124 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
125 assert(src_region_idx != 0, "invalid src_region_idx"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
126 assert(partial_obj_size != 0, "invalid partial_obj_size argument"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
127 assert(destination != NULL, "invalid destination argument"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
128 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
129 _src_region_idx = src_region_idx; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
130 _partial_obj_size = partial_obj_size; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
131 _destination = destination; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
132 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
133 // These fields may not be updated below, so make sure they're clear. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
134 assert(_dest_region_addr == NULL, "should have been cleared"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
135 assert(_first_src_addr == NULL, "should have been cleared"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
136 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
137 // Determine the number of destination regions for the partial object. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
138 HeapWord* const last_word = destination + partial_obj_size - 1; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
139 const ParallelCompactData& sd = PSParallelCompact::summary_data(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
140 HeapWord* const beg_region_addr = sd.region_align_down(destination); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
141 HeapWord* const end_region_addr = sd.region_align_down(last_word); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
142 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
143 if (beg_region_addr == end_region_addr) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
144 // One destination region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
145 _destination_count = 1; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
146 if (end_region_addr == destination) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
147 // The destination falls on a region boundary, thus the first word of the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
148 // partial object will be the first word copied to the destination region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
149 _dest_region_addr = end_region_addr; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
150 _first_src_addr = sd.region_to_addr(src_region_idx); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
151 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
152 } else { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
153 // Two destination regions. When copied, the partial object will cross a |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
154 // destination region boundary, so a word somewhere within the partial |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
155 // object will be the first word copied to the second destination region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
156 _destination_count = 2; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
157 _dest_region_addr = end_region_addr; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
158 const size_t ofs = pointer_delta(end_region_addr, destination); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
159 assert(ofs < _partial_obj_size, "sanity"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
160 _first_src_addr = sd.region_to_addr(src_region_idx) + ofs; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
161 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
162 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
163 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
164 void SplitInfo::clear() |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
165 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
166 _src_region_idx = 0; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
167 _partial_obj_size = 0; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
168 _destination = NULL; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
169 _destination_count = 0; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
170 _dest_region_addr = NULL; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
171 _first_src_addr = NULL; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
172 assert(!is_valid(), "sanity"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
173 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
174 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
175 #ifdef ASSERT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
176 void SplitInfo::verify_clear() |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
177 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
178 assert(_src_region_idx == 0, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
179 assert(_partial_obj_size == 0, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
180 assert(_destination == NULL, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
181 assert(_destination_count == 0, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
182 assert(_dest_region_addr == NULL, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
183 assert(_first_src_addr == NULL, "not clear"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
184 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
185 #endif // #ifdef ASSERT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
186 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
187 |
0 | 188 #ifndef PRODUCT |
189 const char* PSParallelCompact::space_names[] = { | |
190 "perm", "old ", "eden", "from", "to " | |
191 }; | |
192 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
193 void PSParallelCompact::print_region_ranges() |
0 | 194 { |
195 tty->print_cr("space bottom top end new_top"); | |
196 tty->print_cr("------ ---------- ---------- ---------- ----------"); | |
197 | |
198 for (unsigned int id = 0; id < last_space_id; ++id) { | |
199 const MutableSpace* space = _space_info[id].space(); | |
200 tty->print_cr("%u %s " | |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
201 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " " |
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
202 SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10) " ", |
0 | 203 id, space_names[id], |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
204 summary_data().addr_to_region_idx(space->bottom()), |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
205 summary_data().addr_to_region_idx(space->top()), |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
206 summary_data().addr_to_region_idx(space->end()), |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
207 summary_data().addr_to_region_idx(_space_info[id].new_top())); |
0 | 208 } |
209 } | |
210 | |
211 void | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
212 print_generic_summary_region(size_t i, const ParallelCompactData::RegionData* c) |
0 | 213 { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
214 #define REGION_IDX_FORMAT SIZE_FORMAT_W(7) |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
215 #define REGION_DATA_FORMAT SIZE_FORMAT_W(5) |
0 | 216 |
217 ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
218 size_t dci = c->destination() ? sd.addr_to_region_idx(c->destination()) : 0; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
219 tty->print_cr(REGION_IDX_FORMAT " " PTR_FORMAT " " |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
220 REGION_IDX_FORMAT " " PTR_FORMAT " " |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
221 REGION_DATA_FORMAT " " REGION_DATA_FORMAT " " |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
222 REGION_DATA_FORMAT " " REGION_IDX_FORMAT " %d", |
0 | 223 i, c->data_location(), dci, c->destination(), |
224 c->partial_obj_size(), c->live_obj_size(), | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
225 c->data_size(), c->source_region(), c->destination_count()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
226 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
227 #undef REGION_IDX_FORMAT |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
228 #undef REGION_DATA_FORMAT |
0 | 229 } |
230 | |
231 void | |
232 print_generic_summary_data(ParallelCompactData& summary_data, | |
233 HeapWord* const beg_addr, | |
234 HeapWord* const end_addr) | |
235 { | |
236 size_t total_words = 0; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
237 size_t i = summary_data.addr_to_region_idx(beg_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
238 const size_t last = summary_data.addr_to_region_idx(end_addr); |
0 | 239 HeapWord* pdest = 0; |
240 | |
241 while (i <= last) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
242 ParallelCompactData::RegionData* c = summary_data.region(i); |
0 | 243 if (c->data_size() != 0 || c->destination() != pdest) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
244 print_generic_summary_region(i, c); |
0 | 245 total_words += c->data_size(); |
246 pdest = c->destination(); | |
247 } | |
248 ++i; | |
249 } | |
250 | |
251 tty->print_cr("summary_data_bytes=" SIZE_FORMAT, total_words * HeapWordSize); | |
252 } | |
253 | |
254 void | |
255 print_generic_summary_data(ParallelCompactData& summary_data, | |
256 SpaceInfo* space_info) | |
257 { | |
258 for (unsigned int id = 0; id < PSParallelCompact::last_space_id; ++id) { | |
259 const MutableSpace* space = space_info[id].space(); | |
260 print_generic_summary_data(summary_data, space->bottom(), | |
261 MAX2(space->top(), space_info[id].new_top())); | |
262 } | |
263 } | |
264 | |
265 void | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
266 print_initial_summary_region(size_t i, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
267 const ParallelCompactData::RegionData* c, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
268 bool newline = true) |
0 | 269 { |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
270 tty->print(SIZE_FORMAT_W(5) " " PTR_FORMAT " " |
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
271 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " " |
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
272 SIZE_FORMAT_W(5) " " SIZE_FORMAT_W(5) " %d", |
0 | 273 i, c->destination(), |
274 c->partial_obj_size(), c->live_obj_size(), | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
275 c->data_size(), c->source_region(), c->destination_count()); |
0 | 276 if (newline) tty->cr(); |
277 } | |
278 | |
279 void | |
280 print_initial_summary_data(ParallelCompactData& summary_data, | |
281 const MutableSpace* space) { | |
282 if (space->top() == space->bottom()) { | |
283 return; | |
284 } | |
285 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
286 const size_t region_size = ParallelCompactData::RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
287 typedef ParallelCompactData::RegionData RegionData; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
288 HeapWord* const top_aligned_up = summary_data.region_align_up(space->top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
289 const size_t end_region = summary_data.addr_to_region_idx(top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
290 const RegionData* c = summary_data.region(end_region - 1); |
0 | 291 HeapWord* end_addr = c->destination() + c->data_size(); |
292 const size_t live_in_space = pointer_delta(end_addr, space->bottom()); | |
293 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
294 // Print (and count) the full regions at the beginning of the space. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
295 size_t full_region_count = 0; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
296 size_t i = summary_data.addr_to_region_idx(space->bottom()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
297 while (i < end_region && summary_data.region(i)->data_size() == region_size) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
298 print_initial_summary_region(i, summary_data.region(i)); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
299 ++full_region_count; |
0 | 300 ++i; |
301 } | |
302 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
303 size_t live_to_right = live_in_space - full_region_count * region_size; |
0 | 304 |
305 double max_reclaimed_ratio = 0.0; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
306 size_t max_reclaimed_ratio_region = 0; |
0 | 307 size_t max_dead_to_right = 0; |
308 size_t max_live_to_right = 0; | |
309 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
310 // Print the 'reclaimed ratio' for regions while there is something live in |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
311 // the region or to the right of it. The remaining regions are empty (and |
0 | 312 // uninteresting), and computing the ratio will result in division by 0. |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
313 while (i < end_region && live_to_right > 0) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
314 c = summary_data.region(i); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
315 HeapWord* const region_addr = summary_data.region_to_addr(i); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
316 const size_t used_to_right = pointer_delta(space->top(), region_addr); |
0 | 317 const size_t dead_to_right = used_to_right - live_to_right; |
318 const double reclaimed_ratio = double(dead_to_right) / live_to_right; | |
319 | |
320 if (reclaimed_ratio > max_reclaimed_ratio) { | |
321 max_reclaimed_ratio = reclaimed_ratio; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
322 max_reclaimed_ratio_region = i; |
0 | 323 max_dead_to_right = dead_to_right; |
324 max_live_to_right = live_to_right; | |
325 } | |
326 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
327 print_initial_summary_region(i, c, false); |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
328 tty->print_cr(" %12.10f " SIZE_FORMAT_W(10) " " SIZE_FORMAT_W(10), |
0 | 329 reclaimed_ratio, dead_to_right, live_to_right); |
330 | |
331 live_to_right -= c->data_size(); | |
332 ++i; | |
333 } | |
334 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
335 // Any remaining regions are empty. Print one more if there is one. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
336 if (i < end_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
337 print_initial_summary_region(i, summary_data.region(i)); |
0 | 338 } |
339 | |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
340 tty->print_cr("max: " SIZE_FORMAT_W(4) " d2r=" SIZE_FORMAT_W(10) " " |
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
341 "l2r=" SIZE_FORMAT_W(10) " max_ratio=%14.12f", |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
342 max_reclaimed_ratio_region, max_dead_to_right, |
0 | 343 max_live_to_right, max_reclaimed_ratio); |
344 } | |
345 | |
346 void | |
347 print_initial_summary_data(ParallelCompactData& summary_data, | |
348 SpaceInfo* space_info) { | |
349 unsigned int id = PSParallelCompact::perm_space_id; | |
350 const MutableSpace* space; | |
351 do { | |
352 space = space_info[id].space(); | |
353 print_initial_summary_data(summary_data, space); | |
354 } while (++id < PSParallelCompact::eden_space_id); | |
355 | |
356 do { | |
357 space = space_info[id].space(); | |
358 print_generic_summary_data(summary_data, space->bottom(), space->top()); | |
359 } while (++id < PSParallelCompact::last_space_id); | |
360 } | |
361 #endif // #ifndef PRODUCT | |
362 | |
363 #ifdef ASSERT | |
364 size_t add_obj_count; | |
365 size_t add_obj_size; | |
366 size_t mark_bitmap_count; | |
367 size_t mark_bitmap_size; | |
368 #endif // #ifdef ASSERT | |
369 | |
370 ParallelCompactData::ParallelCompactData() | |
371 { | |
372 _region_start = 0; | |
373 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
374 _region_vspace = 0; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
375 _region_data = 0; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
376 _region_count = 0; |
0 | 377 } |
378 | |
379 bool ParallelCompactData::initialize(MemRegion covered_region) | |
380 { | |
381 _region_start = covered_region.start(); | |
382 const size_t region_size = covered_region.word_size(); | |
383 DEBUG_ONLY(_region_end = _region_start + region_size;) | |
384 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
385 assert(region_align_down(_region_start) == _region_start, |
0 | 386 "region start not aligned"); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
387 assert((region_size & RegionSizeOffsetMask) == 0, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
388 "region size not a multiple of RegionSize"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
389 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
390 bool result = initialize_region_data(region_size); |
0 | 391 |
392 return result; | |
393 } | |
394 | |
395 PSVirtualSpace* | |
396 ParallelCompactData::create_vspace(size_t count, size_t element_size) | |
397 { | |
398 const size_t raw_bytes = count * element_size; | |
399 const size_t page_sz = os::page_size_for_region(raw_bytes, raw_bytes, 10); | |
400 const size_t granularity = os::vm_allocation_granularity(); | |
401 const size_t bytes = align_size_up(raw_bytes, MAX2(page_sz, granularity)); | |
402 | |
403 const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 : | |
404 MAX2(page_sz, granularity); | |
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
0
diff
changeset
|
405 ReservedSpace rs(bytes, rs_align, rs_align > 0); |
0 | 406 os::trace_page_sizes("par compact", raw_bytes, raw_bytes, page_sz, rs.base(), |
407 rs.size()); | |
408 PSVirtualSpace* vspace = new PSVirtualSpace(rs, page_sz); | |
409 if (vspace != 0) { | |
410 if (vspace->expand_by(bytes)) { | |
411 return vspace; | |
412 } | |
413 delete vspace; | |
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
414 // Release memory reserved in the space. |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
415 rs.release(); |
0 | 416 } |
417 | |
418 return 0; | |
419 } | |
420 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
421 bool ParallelCompactData::initialize_region_data(size_t region_size) |
0 | 422 { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
423 const size_t count = (region_size + RegionSizeOffsetMask) >> Log2RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
424 _region_vspace = create_vspace(count, sizeof(RegionData)); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
425 if (_region_vspace != 0) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
426 _region_data = (RegionData*)_region_vspace->reserved_low_addr(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
427 _region_count = count; |
0 | 428 return true; |
429 } | |
430 return false; | |
431 } | |
432 | |
433 void ParallelCompactData::clear() | |
434 { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
435 memset(_region_data, 0, _region_vspace->committed_size()); |
0 | 436 } |
437 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
438 void ParallelCompactData::clear_range(size_t beg_region, size_t end_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
439 assert(beg_region <= _region_count, "beg_region out of range"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
440 assert(end_region <= _region_count, "end_region out of range"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
441 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
442 const size_t region_cnt = end_region - beg_region; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
443 memset(_region_data + beg_region, 0, region_cnt * sizeof(RegionData)); |
0 | 444 } |
445 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
446 HeapWord* ParallelCompactData::partial_obj_end(size_t region_idx) const |
0 | 447 { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
448 const RegionData* cur_cp = region(region_idx); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
449 const RegionData* const end_cp = region(region_count() - 1); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
450 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
451 HeapWord* result = region_to_addr(region_idx); |
0 | 452 if (cur_cp < end_cp) { |
453 do { | |
454 result += cur_cp->partial_obj_size(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
455 } while (cur_cp->partial_obj_size() == RegionSize && ++cur_cp < end_cp); |
0 | 456 } |
457 return result; | |
458 } | |
459 | |
460 void ParallelCompactData::add_obj(HeapWord* addr, size_t len) | |
461 { | |
462 const size_t obj_ofs = pointer_delta(addr, _region_start); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
463 const size_t beg_region = obj_ofs >> Log2RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
464 const size_t end_region = (obj_ofs + len - 1) >> Log2RegionSize; |
0 | 465 |
466 DEBUG_ONLY(Atomic::inc_ptr(&add_obj_count);) | |
467 DEBUG_ONLY(Atomic::add_ptr(len, &add_obj_size);) | |
468 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
469 if (beg_region == end_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
470 // All in one region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
471 _region_data[beg_region].add_live_obj(len); |
0 | 472 return; |
473 } | |
474 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
475 // First region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
476 const size_t beg_ofs = region_offset(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
477 _region_data[beg_region].add_live_obj(RegionSize - beg_ofs); |
0 | 478 |
479 klassOop klass = ((oop)addr)->klass(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
480 // Middle regions--completely spanned by this object. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
481 for (size_t region = beg_region + 1; region < end_region; ++region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
482 _region_data[region].set_partial_obj_size(RegionSize); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
483 _region_data[region].set_partial_obj_addr(addr); |
0 | 484 } |
485 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
486 // Last region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
487 const size_t end_ofs = region_offset(addr + len - 1); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
488 _region_data[end_region].set_partial_obj_size(end_ofs + 1); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
489 _region_data[end_region].set_partial_obj_addr(addr); |
0 | 490 } |
491 | |
492 void | |
493 ParallelCompactData::summarize_dense_prefix(HeapWord* beg, HeapWord* end) | |
494 { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
495 assert(region_offset(beg) == 0, "not RegionSize aligned"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
496 assert(region_offset(end) == 0, "not RegionSize aligned"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
497 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
498 size_t cur_region = addr_to_region_idx(beg); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
499 const size_t end_region = addr_to_region_idx(end); |
0 | 500 HeapWord* addr = beg; |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
501 while (cur_region < end_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
502 _region_data[cur_region].set_destination(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
503 _region_data[cur_region].set_destination_count(0); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
504 _region_data[cur_region].set_source_region(cur_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
505 _region_data[cur_region].set_data_location(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
506 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
507 // Update live_obj_size so the region appears completely full. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
508 size_t live_size = RegionSize - _region_data[cur_region].partial_obj_size(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
509 _region_data[cur_region].set_live_obj_size(live_size); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
510 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
511 ++cur_region; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
512 addr += RegionSize; |
0 | 513 } |
514 } | |
515 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
516 // Find the point at which a space can be split and, if necessary, record the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
517 // split point. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
518 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
519 // If the current src region (which overflowed the destination space) doesn't |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
520 // have a partial object, the split point is at the beginning of the current src |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
521 // region (an "easy" split, no extra bookkeeping required). |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
522 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
523 // If the current src region has a partial object, the split point is in the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
524 // region where that partial object starts (call it the split_region). If |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
525 // split_region has a partial object, then the split point is just after that |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
526 // partial object (a "hard" split where we have to record the split data and |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
527 // zero the partial_obj_size field). With a "hard" split, we know that the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
528 // partial_obj ends within split_region because the partial object that caused |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
529 // the overflow starts in split_region. If split_region doesn't have a partial |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
530 // obj, then the split is at the beginning of split_region (another "easy" |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
531 // split). |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
532 HeapWord* |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
533 ParallelCompactData::summarize_split_space(size_t src_region, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
534 SplitInfo& split_info, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
535 HeapWord* destination, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
536 HeapWord* target_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
537 HeapWord** target_next) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
538 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
539 assert(destination <= target_end, "sanity"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
540 assert(destination + _region_data[src_region].data_size() > target_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
541 "region should not fit into target space"); |
696
f18338cf04b0
6810474: par compact - crash in summary_phase with very full heap
jcoomes
parents:
628
diff
changeset
|
542 assert(is_region_aligned(target_end), "sanity"); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
543 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
544 size_t split_region = src_region; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
545 HeapWord* split_destination = destination; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
546 size_t partial_obj_size = _region_data[src_region].partial_obj_size(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
547 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
548 if (destination + partial_obj_size > target_end) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
549 // The split point is just after the partial object (if any) in the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
550 // src_region that contains the start of the object that overflowed the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
551 // destination space. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
552 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
553 // Find the start of the "overflow" object and set split_region to the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
554 // region containing it. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
555 HeapWord* const overflow_obj = _region_data[src_region].partial_obj_addr(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
556 split_region = addr_to_region_idx(overflow_obj); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
557 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
558 // Clear the source_region field of all destination regions whose first word |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
559 // came from data after the split point (a non-null source_region field |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
560 // implies a region must be filled). |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
561 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
562 // An alternative to the simple loop below: clear during post_compact(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
563 // which uses memcpy instead of individual stores, and is easy to |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
564 // parallelize. (The downside is that it clears the entire RegionData |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
565 // object as opposed to just one field.) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
566 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
567 // post_compact() would have to clear the summary data up to the highest |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
568 // address that was written during the summary phase, which would be |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
569 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
570 // max(top, max(new_top, clear_top)) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
571 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
572 // where clear_top is a new field in SpaceInfo. Would have to set clear_top |
696
f18338cf04b0
6810474: par compact - crash in summary_phase with very full heap
jcoomes
parents:
628
diff
changeset
|
573 // to target_end. |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
574 const RegionData* const sr = region(split_region); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
575 const size_t beg_idx = |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
576 addr_to_region_idx(region_align_up(sr->destination() + |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
577 sr->partial_obj_size())); |
696
f18338cf04b0
6810474: par compact - crash in summary_phase with very full heap
jcoomes
parents:
628
diff
changeset
|
578 const size_t end_idx = addr_to_region_idx(target_end); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
579 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
580 if (TraceParallelOldGCSummaryPhase) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
581 gclog_or_tty->print_cr("split: clearing source_region field in [" |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
582 SIZE_FORMAT ", " SIZE_FORMAT ")", |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
583 beg_idx, end_idx); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
584 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
585 for (size_t idx = beg_idx; idx < end_idx; ++idx) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
586 _region_data[idx].set_source_region(0); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
587 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
588 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
589 // Set split_destination and partial_obj_size to reflect the split region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
590 split_destination = sr->destination(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
591 partial_obj_size = sr->partial_obj_size(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
592 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
593 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
594 // The split is recorded only if a partial object extends onto the region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
595 if (partial_obj_size != 0) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
596 _region_data[split_region].set_partial_obj_size(0); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
597 split_info.record(split_region, partial_obj_size, split_destination); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
598 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
599 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
600 // Setup the continuation addresses. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
601 *target_next = split_destination + partial_obj_size; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
602 HeapWord* const source_next = region_to_addr(split_region) + partial_obj_size; |
0 | 603 |
604 if (TraceParallelOldGCSummaryPhase) { | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
605 const char * split_type = partial_obj_size == 0 ? "easy" : "hard"; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
606 gclog_or_tty->print_cr("%s split: src=" PTR_FORMAT " src_c=" SIZE_FORMAT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
607 " pos=" SIZE_FORMAT, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
608 split_type, source_next, split_region, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
609 partial_obj_size); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
610 gclog_or_tty->print_cr("%s split: dst=" PTR_FORMAT " dst_c=" SIZE_FORMAT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
611 " tn=" PTR_FORMAT, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
612 split_type, split_destination, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
613 addr_to_region_idx(split_destination), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
614 *target_next); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
615 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
616 if (partial_obj_size != 0) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
617 HeapWord* const po_beg = split_info.destination(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
618 HeapWord* const po_end = po_beg + split_info.partial_obj_size(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
619 gclog_or_tty->print_cr("%s split: " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
620 "po_beg=" PTR_FORMAT " " SIZE_FORMAT " " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
621 "po_end=" PTR_FORMAT " " SIZE_FORMAT, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
622 split_type, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
623 po_beg, addr_to_region_idx(po_beg), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
624 po_end, addr_to_region_idx(po_end)); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
625 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
626 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
627 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
628 return source_next; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
629 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
630 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
631 bool ParallelCompactData::summarize(SplitInfo& split_info, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
632 HeapWord* source_beg, HeapWord* source_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
633 HeapWord** source_next, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
634 HeapWord* target_beg, HeapWord* target_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
635 HeapWord** target_next) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
636 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
637 if (TraceParallelOldGCSummaryPhase) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
638 HeapWord* const source_next_val = source_next == NULL ? NULL : *source_next; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
639 tty->print_cr("sb=" PTR_FORMAT " se=" PTR_FORMAT " sn=" PTR_FORMAT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
640 "tb=" PTR_FORMAT " te=" PTR_FORMAT " tn=" PTR_FORMAT, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
641 source_beg, source_end, source_next_val, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
642 target_beg, target_end, *target_next); |
0 | 643 } |
644 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
645 size_t cur_region = addr_to_region_idx(source_beg); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
646 const size_t end_region = addr_to_region_idx(region_align_up(source_end)); |
0 | 647 |
648 HeapWord *dest_addr = target_beg; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
649 while (cur_region < end_region) { |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
650 // The destination must be set even if the region has no data. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
651 _region_data[cur_region].set_destination(dest_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
652 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
653 size_t words = _region_data[cur_region].data_size(); |
0 | 654 if (words > 0) { |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
655 // If cur_region does not fit entirely into the target space, find a point |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
656 // at which the source space can be 'split' so that part is copied to the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
657 // target space and the rest is copied elsewhere. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
658 if (dest_addr + words > target_end) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
659 assert(source_next != NULL, "source_next is NULL when splitting"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
660 *source_next = summarize_split_space(cur_region, split_info, dest_addr, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
661 target_end, target_next); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
662 return false; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
663 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
664 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
665 // Compute the destination_count for cur_region, and if necessary, update |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
666 // source_region for a destination region. The source_region field is |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
667 // updated if cur_region is the first (left-most) region to be copied to a |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
668 // destination region. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
669 // |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
670 // The destination_count calculation is a bit subtle. A region that has |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
671 // data that compacts into itself does not count itself as a destination. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
672 // This maintains the invariant that a zero count means the region is |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
673 // available and can be claimed and then filled. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
674 uint destination_count = 0; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
675 if (split_info.is_split(cur_region)) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
676 // The current region has been split: the partial object will be copied |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
677 // to one destination space and the remaining data will be copied to |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
678 // another destination space. Adjust the initial destination_count and, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
679 // if necessary, set the source_region field if the partial object will |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
680 // cross a destination region boundary. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
681 destination_count = split_info.destination_count(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
682 if (destination_count == 2) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
683 size_t dest_idx = addr_to_region_idx(split_info.dest_region_addr()); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
684 _region_data[dest_idx].set_source_region(cur_region); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
685 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
686 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
687 |
0 | 688 HeapWord* const last_addr = dest_addr + words - 1; |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
689 const size_t dest_region_1 = addr_to_region_idx(dest_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
690 const size_t dest_region_2 = addr_to_region_idx(last_addr); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
691 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
692 // Initially assume that the destination regions will be the same and |
0 | 693 // adjust the value below if necessary. Under this assumption, if |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
694 // cur_region == dest_region_2, then cur_region will be compacted |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
695 // completely into itself. |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
696 destination_count += cur_region == dest_region_2 ? 0 : 1; |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
697 if (dest_region_1 != dest_region_2) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
698 // Destination regions differ; adjust destination_count. |
0 | 699 destination_count += 1; |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
700 // Data from cur_region will be copied to the start of dest_region_2. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
701 _region_data[dest_region_2].set_source_region(cur_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
702 } else if (region_offset(dest_addr) == 0) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
703 // Data from cur_region will be copied to the start of the destination |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
704 // region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
705 _region_data[dest_region_1].set_source_region(cur_region); |
0 | 706 } |
707 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
708 _region_data[cur_region].set_destination_count(destination_count); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
709 _region_data[cur_region].set_data_location(region_to_addr(cur_region)); |
0 | 710 dest_addr += words; |
711 } | |
712 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
713 ++cur_region; |
0 | 714 } |
715 | |
716 *target_next = dest_addr; | |
717 return true; | |
718 } | |
719 | |
720 HeapWord* ParallelCompactData::calc_new_pointer(HeapWord* addr) { | |
721 assert(addr != NULL, "Should detect NULL oop earlier"); | |
722 assert(PSParallelCompact::gc_heap()->is_in(addr), "addr not in heap"); | |
723 #ifdef ASSERT | |
724 if (PSParallelCompact::mark_bitmap()->is_unmarked(addr)) { | |
725 gclog_or_tty->print_cr("calc_new_pointer:: addr " PTR_FORMAT, addr); | |
726 } | |
727 #endif | |
728 assert(PSParallelCompact::mark_bitmap()->is_marked(addr), "obj not marked"); | |
729 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
730 // Region covering the object. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
731 size_t region_index = addr_to_region_idx(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
732 const RegionData* const region_ptr = region(region_index); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
733 HeapWord* const region_addr = region_align_down(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
734 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
735 assert(addr < region_addr + RegionSize, "Region does not cover object"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
736 assert(addr_to_region_ptr(region_addr) == region_ptr, "sanity check"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
737 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
738 HeapWord* result = region_ptr->destination(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
739 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
740 // If all the data in the region is live, then the new location of the object |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
741 // can be calculated from the destination of the region plus the offset of the |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
742 // object in the region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
743 if (region_ptr->data_size() == RegionSize) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
744 result += pointer_delta(addr, region_addr); |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
745 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);) |
0 | 746 return result; |
747 } | |
748 | |
749 // The new location of the object is | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
750 // region destination + |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
751 // size of the partial object extending onto the region + |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
752 // sizes of the live objects in the Region that are to the left of addr |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
753 const size_t partial_obj_size = region_ptr->partial_obj_size(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
754 HeapWord* const search_start = region_addr + partial_obj_size; |
0 | 755 |
756 const ParMarkBitMap* bitmap = PSParallelCompact::mark_bitmap(); | |
757 size_t live_to_left = bitmap->live_words_in_range(search_start, oop(addr)); | |
758 | |
759 result += partial_obj_size + live_to_left; | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
760 DEBUG_ONLY(PSParallelCompact::check_new_location(addr, result);) |
0 | 761 return result; |
762 } | |
763 | |
764 klassOop ParallelCompactData::calc_new_klass(klassOop old_klass) { | |
765 klassOop updated_klass; | |
766 if (PSParallelCompact::should_update_klass(old_klass)) { | |
767 updated_klass = (klassOop) calc_new_pointer(old_klass); | |
768 } else { | |
769 updated_klass = old_klass; | |
770 } | |
771 | |
772 return updated_klass; | |
773 } | |
774 | |
775 #ifdef ASSERT | |
776 void ParallelCompactData::verify_clear(const PSVirtualSpace* vspace) | |
777 { | |
778 const size_t* const beg = (const size_t*)vspace->committed_low_addr(); | |
779 const size_t* const end = (const size_t*)vspace->committed_high_addr(); | |
780 for (const size_t* p = beg; p < end; ++p) { | |
781 assert(*p == 0, "not zero"); | |
782 } | |
783 } | |
784 | |
785 void ParallelCompactData::verify_clear() | |
786 { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
787 verify_clear(_region_vspace); |
0 | 788 } |
789 #endif // #ifdef ASSERT | |
790 | |
791 #ifdef NOT_PRODUCT | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
792 ParallelCompactData::RegionData* debug_region(size_t region_index) { |
0 | 793 ParallelCompactData& sd = PSParallelCompact::summary_data(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
794 return sd.region(region_index); |
0 | 795 } |
796 #endif | |
797 | |
798 elapsedTimer PSParallelCompact::_accumulated_time; | |
799 unsigned int PSParallelCompact::_total_invocations = 0; | |
800 unsigned int PSParallelCompact::_maximum_compaction_gc_num = 0; | |
801 jlong PSParallelCompact::_time_of_last_gc = 0; | |
802 CollectorCounters* PSParallelCompact::_counters = NULL; | |
803 ParMarkBitMap PSParallelCompact::_mark_bitmap; | |
804 ParallelCompactData PSParallelCompact::_summary_data; | |
805 | |
806 PSParallelCompact::IsAliveClosure PSParallelCompact::_is_alive_closure; | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
807 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
808 void PSParallelCompact::IsAliveClosure::do_object(oop p) { ShouldNotReachHere(); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
809 bool PSParallelCompact::IsAliveClosure::do_object_b(oop p) { return mark_bitmap()->is_marked(p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
810 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
811 void PSParallelCompact::KeepAliveClosure::do_oop(oop* p) { PSParallelCompact::KeepAliveClosure::do_oop_work(p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
812 void PSParallelCompact::KeepAliveClosure::do_oop(narrowOop* p) { PSParallelCompact::KeepAliveClosure::do_oop_work(p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
813 |
0 | 814 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_root_pointer_closure(true); |
815 PSParallelCompact::AdjustPointerClosure PSParallelCompact::_adjust_pointer_closure(false); | |
816 | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
817 void PSParallelCompact::AdjustPointerClosure::do_oop(oop* p) { adjust_pointer(p, _is_root); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
818 void PSParallelCompact::AdjustPointerClosure::do_oop(narrowOop* p) { adjust_pointer(p, _is_root); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
819 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
997
diff
changeset
|
820 void PSParallelCompact::FollowStackClosure::do_void() { _compaction_manager->follow_marking_stacks(); } |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
821 |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
822 void PSParallelCompact::MarkAndPushClosure::do_oop(oop* p) { mark_and_push(_compaction_manager, p); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
823 void PSParallelCompact::MarkAndPushClosure::do_oop(narrowOop* p) { mark_and_push(_compaction_manager, p); } |
0 | 824 |
825 void PSParallelCompact::post_initialize() { | |
826 ParallelScavengeHeap* heap = gc_heap(); | |
827 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
828 | |
829 MemRegion mr = heap->reserved_region(); | |
830 _ref_processor = ReferenceProcessor::create_ref_processor( | |
831 mr, // span | |
832 true, // atomic_discovery | |
833 true, // mt_discovery | |
834 &_is_alive_closure, | |
835 ParallelGCThreads, | |
836 ParallelRefProcEnabled); | |
837 _counters = new CollectorCounters("PSParallelCompact", 1); | |
838 | |
839 // Initialize static fields in ParCompactionManager. | |
840 ParCompactionManager::initialize(mark_bitmap()); | |
841 } | |
842 | |
843 bool PSParallelCompact::initialize() { | |
844 ParallelScavengeHeap* heap = gc_heap(); | |
845 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
846 MemRegion mr = heap->reserved_region(); | |
847 | |
848 // Was the old gen get allocated successfully? | |
849 if (!heap->old_gen()->is_allocated()) { | |
850 return false; | |
851 } | |
852 | |
853 initialize_space_info(); | |
854 initialize_dead_wood_limiter(); | |
855 | |
856 if (!_mark_bitmap.initialize(mr)) { | |
857 vm_shutdown_during_initialization("Unable to allocate bit map for " | |
858 "parallel garbage collection for the requested heap size."); | |
859 return false; | |
860 } | |
861 | |
862 if (!_summary_data.initialize(mr)) { | |
863 vm_shutdown_during_initialization("Unable to allocate tables for " | |
864 "parallel garbage collection for the requested heap size."); | |
865 return false; | |
866 } | |
867 | |
868 return true; | |
869 } | |
870 | |
871 void PSParallelCompact::initialize_space_info() | |
872 { | |
873 memset(&_space_info, 0, sizeof(_space_info)); | |
874 | |
875 ParallelScavengeHeap* heap = gc_heap(); | |
876 PSYoungGen* young_gen = heap->young_gen(); | |
877 MutableSpace* perm_space = heap->perm_gen()->object_space(); | |
878 | |
879 _space_info[perm_space_id].set_space(perm_space); | |
880 _space_info[old_space_id].set_space(heap->old_gen()->object_space()); | |
881 _space_info[eden_space_id].set_space(young_gen->eden_space()); | |
882 _space_info[from_space_id].set_space(young_gen->from_space()); | |
883 _space_info[to_space_id].set_space(young_gen->to_space()); | |
884 | |
885 _space_info[perm_space_id].set_start_array(heap->perm_gen()->start_array()); | |
886 _space_info[old_space_id].set_start_array(heap->old_gen()->start_array()); | |
887 | |
888 _space_info[perm_space_id].set_min_dense_prefix(perm_space->top()); | |
889 if (TraceParallelOldGCDensePrefix) { | |
890 tty->print_cr("perm min_dense_prefix=" PTR_FORMAT, | |
891 _space_info[perm_space_id].min_dense_prefix()); | |
892 } | |
893 } | |
894 | |
895 void PSParallelCompact::initialize_dead_wood_limiter() | |
896 { | |
897 const size_t max = 100; | |
898 _dwl_mean = double(MIN2(ParallelOldDeadWoodLimiterMean, max)) / 100.0; | |
899 _dwl_std_dev = double(MIN2(ParallelOldDeadWoodLimiterStdDev, max)) / 100.0; | |
900 _dwl_first_term = 1.0 / (sqrt(2.0 * M_PI) * _dwl_std_dev); | |
901 DEBUG_ONLY(_dwl_initialized = true;) | |
902 _dwl_adjustment = normal_distribution(1.0); | |
903 } | |
904 | |
905 // Simple class for storing info about the heap at the start of GC, to be used | |
906 // after GC for comparison/printing. | |
907 class PreGCValues { | |
908 public: | |
909 PreGCValues() { } | |
910 PreGCValues(ParallelScavengeHeap* heap) { fill(heap); } | |
911 | |
912 void fill(ParallelScavengeHeap* heap) { | |
913 _heap_used = heap->used(); | |
914 _young_gen_used = heap->young_gen()->used_in_bytes(); | |
915 _old_gen_used = heap->old_gen()->used_in_bytes(); | |
916 _perm_gen_used = heap->perm_gen()->used_in_bytes(); | |
917 }; | |
918 | |
919 size_t heap_used() const { return _heap_used; } | |
920 size_t young_gen_used() const { return _young_gen_used; } | |
921 size_t old_gen_used() const { return _old_gen_used; } | |
922 size_t perm_gen_used() const { return _perm_gen_used; } | |
923 | |
924 private: | |
925 size_t _heap_used; | |
926 size_t _young_gen_used; | |
927 size_t _old_gen_used; | |
928 size_t _perm_gen_used; | |
929 }; | |
930 | |
931 void | |
932 PSParallelCompact::clear_data_covering_space(SpaceId id) | |
933 { | |
934 // At this point, top is the value before GC, new_top() is the value that will | |
935 // be set at the end of GC. The marking bitmap is cleared to top; nothing | |
936 // should be marked above top. The summary data is cleared to the larger of | |
937 // top & new_top. | |
938 MutableSpace* const space = _space_info[id].space(); | |
939 HeapWord* const bot = space->bottom(); | |
940 HeapWord* const top = space->top(); | |
941 HeapWord* const max_top = MAX2(top, _space_info[id].new_top()); | |
942 | |
943 const idx_t beg_bit = _mark_bitmap.addr_to_bit(bot); | |
944 const idx_t end_bit = BitMap::word_align_up(_mark_bitmap.addr_to_bit(top)); | |
945 _mark_bitmap.clear_range(beg_bit, end_bit); | |
946 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
947 const size_t beg_region = _summary_data.addr_to_region_idx(bot); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
948 const size_t end_region = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
949 _summary_data.addr_to_region_idx(_summary_data.region_align_up(max_top)); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
950 _summary_data.clear_range(beg_region, end_region); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
951 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
952 // Clear the data used to 'split' regions. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
953 SplitInfo& split_info = _space_info[id].split_info(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
954 if (split_info.is_valid()) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
955 split_info.clear(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
956 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
957 DEBUG_ONLY(split_info.verify_clear();) |
0 | 958 } |
959 | |
960 void PSParallelCompact::pre_compact(PreGCValues* pre_gc_values) | |
961 { | |
962 // Update the from & to space pointers in space_info, since they are swapped | |
963 // at each young gen gc. Do the update unconditionally (even though a | |
964 // promotion failure does not swap spaces) because an unknown number of minor | |
965 // collections will have swapped the spaces an unknown number of times. | |
966 TraceTime tm("pre compact", print_phases(), true, gclog_or_tty); | |
967 ParallelScavengeHeap* heap = gc_heap(); | |
968 _space_info[from_space_id].set_space(heap->young_gen()->from_space()); | |
969 _space_info[to_space_id].set_space(heap->young_gen()->to_space()); | |
970 | |
971 pre_gc_values->fill(heap); | |
972 | |
973 ParCompactionManager::reset(); | |
974 NOT_PRODUCT(_mark_bitmap.reset_counters()); | |
975 DEBUG_ONLY(add_obj_count = add_obj_size = 0;) | |
976 DEBUG_ONLY(mark_bitmap_count = mark_bitmap_size = 0;) | |
977 | |
978 // Increment the invocation count | |
139
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
979 heap->increment_total_collections(true); |
0 | 980 |
981 // We need to track unique mark sweep invocations as well. | |
982 _total_invocations++; | |
983 | |
984 if (PrintHeapAtGC) { | |
985 Universe::print_heap_before_gc(); | |
986 } | |
987 | |
988 // Fill in TLABs | |
989 heap->accumulate_statistics_all_tlabs(); | |
990 heap->ensure_parsability(true); // retire TLABs | |
991 | |
992 if (VerifyBeforeGC && heap->total_collections() >= VerifyGCStartAt) { | |
993 HandleMark hm; // Discard invalid handles created during verification | |
994 gclog_or_tty->print(" VerifyBeforeGC:"); | |
995 Universe::verify(true); | |
996 } | |
997 | |
998 // Verify object start arrays | |
999 if (VerifyObjectStartArray && | |
1000 VerifyBeforeGC) { | |
1001 heap->old_gen()->verify_object_start_array(); | |
1002 heap->perm_gen()->verify_object_start_array(); | |
1003 } | |
1004 | |
1005 DEBUG_ONLY(mark_bitmap()->verify_clear();) | |
1006 DEBUG_ONLY(summary_data().verify_clear();) | |
210 | 1007 |
1008 // Have worker threads release resources the next time they run a task. | |
1009 gc_task_manager()->release_all_resources(); | |
0 | 1010 } |
1011 | |
1012 void PSParallelCompact::post_compact() | |
1013 { | |
1014 TraceTime tm("post compact", print_phases(), true, gclog_or_tty); | |
1015 | |
1016 for (unsigned int id = perm_space_id; id < last_space_id; ++id) { | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1017 // Clear the marking bitmap, summary data and split info. |
0 | 1018 clear_data_covering_space(SpaceId(id)); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1019 // Update top(). Must be done after clearing the bitmap and summary data. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1020 _space_info[id].publish_new_top(); |
0 | 1021 } |
1022 | |
1023 MutableSpace* const eden_space = _space_info[eden_space_id].space(); | |
1024 MutableSpace* const from_space = _space_info[from_space_id].space(); | |
1025 MutableSpace* const to_space = _space_info[to_space_id].space(); | |
1026 | |
1027 ParallelScavengeHeap* heap = gc_heap(); | |
1028 bool eden_empty = eden_space->is_empty(); | |
1029 if (!eden_empty) { | |
1030 eden_empty = absorb_live_data_from_eden(heap->size_policy(), | |
1031 heap->young_gen(), heap->old_gen()); | |
1032 } | |
1033 | |
1034 // Update heap occupancy information which is used as input to the soft ref | |
1035 // clearing policy at the next gc. | |
1036 Universe::update_heap_info_at_gc(); | |
1037 | |
1038 bool young_gen_empty = eden_empty && from_space->is_empty() && | |
1039 to_space->is_empty(); | |
1040 | |
1041 BarrierSet* bs = heap->barrier_set(); | |
1042 if (bs->is_a(BarrierSet::ModRef)) { | |
1043 ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs; | |
1044 MemRegion old_mr = heap->old_gen()->reserved(); | |
1045 MemRegion perm_mr = heap->perm_gen()->reserved(); | |
1046 assert(perm_mr.end() <= old_mr.start(), "Generations out of order"); | |
1047 | |
1048 if (young_gen_empty) { | |
1049 modBS->clear(MemRegion(perm_mr.start(), old_mr.end())); | |
1050 } else { | |
1051 modBS->invalidate(MemRegion(perm_mr.start(), old_mr.end())); | |
1052 } | |
1053 } | |
1054 | |
1055 Threads::gc_epilogue(); | |
1056 CodeCache::gc_epilogue(); | |
1057 | |
1058 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
1059 | |
1060 ref_processor()->enqueue_discovered_references(NULL); | |
1061 | |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
1062 if (ZapUnusedHeapArea) { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
1063 heap->gen_mangle_unused_area(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
1064 } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
1065 |
0 | 1066 // Update time of last GC |
1067 reset_millis_since_last_gc(); | |
1068 } | |
1069 | |
1070 HeapWord* | |
1071 PSParallelCompact::compute_dense_prefix_via_density(const SpaceId id, | |
1072 bool maximum_compaction) | |
1073 { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1074 const size_t region_size = ParallelCompactData::RegionSize; |
0 | 1075 const ParallelCompactData& sd = summary_data(); |
1076 | |
1077 const MutableSpace* const space = _space_info[id].space(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1078 HeapWord* const top_aligned_up = sd.region_align_up(space->top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1079 const RegionData* const beg_cp = sd.addr_to_region_ptr(space->bottom()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1080 const RegionData* const end_cp = sd.addr_to_region_ptr(top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1081 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1082 // Skip full regions at the beginning of the space--they are necessarily part |
0 | 1083 // of the dense prefix. |
1084 size_t full_count = 0; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1085 const RegionData* cp; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1086 for (cp = beg_cp; cp < end_cp && cp->data_size() == region_size; ++cp) { |
0 | 1087 ++full_count; |
1088 } | |
1089 | |
1090 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); | |
1091 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; | |
1092 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval; | |
1093 if (maximum_compaction || cp == end_cp || interval_ended) { | |
1094 _maximum_compaction_gc_num = total_invocations(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1095 return sd.region_to_addr(cp); |
0 | 1096 } |
1097 | |
1098 HeapWord* const new_top = _space_info[id].new_top(); | |
1099 const size_t space_live = pointer_delta(new_top, space->bottom()); | |
1100 const size_t space_used = space->used_in_words(); | |
1101 const size_t space_capacity = space->capacity_in_words(); | |
1102 | |
1103 const double cur_density = double(space_live) / space_capacity; | |
1104 const double deadwood_density = | |
1105 (1.0 - cur_density) * (1.0 - cur_density) * cur_density * cur_density; | |
1106 const size_t deadwood_goal = size_t(space_capacity * deadwood_density); | |
1107 | |
1108 if (TraceParallelOldGCDensePrefix) { | |
1109 tty->print_cr("cur_dens=%5.3f dw_dens=%5.3f dw_goal=" SIZE_FORMAT, | |
1110 cur_density, deadwood_density, deadwood_goal); | |
1111 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " | |
1112 "space_cap=" SIZE_FORMAT, | |
1113 space_live, space_used, | |
1114 space_capacity); | |
1115 } | |
1116 | |
1117 // XXX - Use binary search? | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1118 HeapWord* dense_prefix = sd.region_to_addr(cp); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1119 const RegionData* full_cp = cp; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1120 const RegionData* const top_cp = sd.addr_to_region_ptr(space->top() - 1); |
0 | 1121 while (cp < end_cp) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1122 HeapWord* region_destination = cp->destination(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1123 const size_t cur_deadwood = pointer_delta(dense_prefix, region_destination); |
0 | 1124 if (TraceParallelOldGCDensePrefix && Verbose) { |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
1125 tty->print_cr("c#=" SIZE_FORMAT_W(4) " dst=" PTR_FORMAT " " |
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
1126 "dp=" SIZE_FORMAT_W(8) " " "cdw=" SIZE_FORMAT_W(8), |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1127 sd.region(cp), region_destination, |
0 | 1128 dense_prefix, cur_deadwood); |
1129 } | |
1130 | |
1131 if (cur_deadwood >= deadwood_goal) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1132 // Found the region that has the correct amount of deadwood to the left. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1133 // This typically occurs after crossing a fairly sparse set of regions, so |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1134 // iterate backwards over those sparse regions, looking for the region |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1135 // that has the lowest density of live objects 'to the right.' |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1136 size_t space_to_left = sd.region(cp) * region_size; |
0 | 1137 size_t live_to_left = space_to_left - cur_deadwood; |
1138 size_t space_to_right = space_capacity - space_to_left; | |
1139 size_t live_to_right = space_live - live_to_left; | |
1140 double density_to_right = double(live_to_right) / space_to_right; | |
1141 while (cp > full_cp) { | |
1142 --cp; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1143 const size_t prev_region_live_to_right = live_to_right - |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1144 cp->data_size(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1145 const size_t prev_region_space_to_right = space_to_right + region_size; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1146 double prev_region_density_to_right = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1147 double(prev_region_live_to_right) / prev_region_space_to_right; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1148 if (density_to_right <= prev_region_density_to_right) { |
0 | 1149 return dense_prefix; |
1150 } | |
1151 if (TraceParallelOldGCDensePrefix && Verbose) { | |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
1152 tty->print_cr("backing up from c=" SIZE_FORMAT_W(4) " d2r=%10.8f " |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1153 "pc_d2r=%10.8f", sd.region(cp), density_to_right, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1154 prev_region_density_to_right); |
0 | 1155 } |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1156 dense_prefix -= region_size; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1157 live_to_right = prev_region_live_to_right; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1158 space_to_right = prev_region_space_to_right; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1159 density_to_right = prev_region_density_to_right; |
0 | 1160 } |
1161 return dense_prefix; | |
1162 } | |
1163 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1164 dense_prefix += region_size; |
0 | 1165 ++cp; |
1166 } | |
1167 | |
1168 return dense_prefix; | |
1169 } | |
1170 | |
1171 #ifndef PRODUCT | |
1172 void PSParallelCompact::print_dense_prefix_stats(const char* const algorithm, | |
1173 const SpaceId id, | |
1174 const bool maximum_compaction, | |
1175 HeapWord* const addr) | |
1176 { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1177 const size_t region_idx = summary_data().addr_to_region_idx(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1178 RegionData* const cp = summary_data().region(region_idx); |
0 | 1179 const MutableSpace* const space = _space_info[id].space(); |
1180 HeapWord* const new_top = _space_info[id].new_top(); | |
1181 | |
1182 const size_t space_live = pointer_delta(new_top, space->bottom()); | |
1183 const size_t dead_to_left = pointer_delta(addr, cp->destination()); | |
1184 const size_t space_cap = space->capacity_in_words(); | |
1185 const double dead_to_left_pct = double(dead_to_left) / space_cap; | |
1186 const size_t live_to_right = new_top - cp->destination(); | |
1187 const size_t dead_to_right = space->top() - addr - live_to_right; | |
1188 | |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
1189 tty->print_cr("%s=" PTR_FORMAT " dpc=" SIZE_FORMAT_W(5) " " |
0 | 1190 "spl=" SIZE_FORMAT " " |
1191 "d2l=" SIZE_FORMAT " d2l%%=%6.4f " | |
1192 "d2r=" SIZE_FORMAT " l2r=" SIZE_FORMAT | |
1193 " ratio=%10.8f", | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1194 algorithm, addr, region_idx, |
0 | 1195 space_live, |
1196 dead_to_left, dead_to_left_pct, | |
1197 dead_to_right, live_to_right, | |
1198 double(dead_to_right) / live_to_right); | |
1199 } | |
1200 #endif // #ifndef PRODUCT | |
1201 | |
1202 // Return a fraction indicating how much of the generation can be treated as | |
1203 // "dead wood" (i.e., not reclaimed). The function uses a normal distribution | |
1204 // based on the density of live objects in the generation to determine a limit, | |
1205 // which is then adjusted so the return value is min_percent when the density is | |
1206 // 1. | |
1207 // | |
1208 // The following table shows some return values for a different values of the | |
1209 // standard deviation (ParallelOldDeadWoodLimiterStdDev); the mean is 0.5 and | |
1210 // min_percent is 1. | |
1211 // | |
1212 // fraction allowed as dead wood | |
1213 // ----------------------------------------------------------------- | |
1214 // density std_dev=70 std_dev=75 std_dev=80 std_dev=85 std_dev=90 std_dev=95 | |
1215 // ------- ---------- ---------- ---------- ---------- ---------- ---------- | |
1216 // 0.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 | |
1217 // 0.05000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 | |
1218 // 0.10000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 | |
1219 // 0.15000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 | |
1220 // 0.20000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 | |
1221 // 0.25000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 | |
1222 // 0.30000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 | |
1223 // 0.35000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 | |
1224 // 0.40000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 | |
1225 // 0.45000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 | |
1226 // 0.50000 0.13832410 0.11599237 0.09847664 0.08456518 0.07338887 0.06431510 | |
1227 // 0.55000 0.13687208 0.11481163 0.09750361 0.08375387 0.07270534 0.06373386 | |
1228 // 0.60000 0.13253818 0.11128511 0.09459590 0.08132834 0.07066107 0.06199500 | |
1229 // 0.65000 0.12538832 0.10545958 0.08978741 0.07731366 0.06727491 0.05911289 | |
1230 // 0.70000 0.11553050 0.09741183 0.08313394 0.07175114 0.06257797 0.05511132 | |
1231 // 0.75000 0.10311208 0.08724696 0.07471205 0.06469760 0.05661313 0.05002313 | |
1232 // 0.80000 0.08831616 0.07509618 0.06461766 0.05622444 0.04943437 0.04388975 | |
1233 // 0.85000 0.07135702 0.06111390 0.05296419 0.04641639 0.04110601 0.03676066 | |
1234 // 0.90000 0.05247504 0.04547452 0.03988045 0.03537016 0.03170171 0.02869272 | |
1235 // 0.95000 0.03193096 0.02836880 0.02550828 0.02319280 0.02130337 0.01974941 | |
1236 // 1.00000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 0.01000000 | |
1237 | |
1238 double PSParallelCompact::dead_wood_limiter(double density, size_t min_percent) | |
1239 { | |
1240 assert(_dwl_initialized, "uninitialized"); | |
1241 | |
1242 // The raw limit is the value of the normal distribution at x = density. | |
1243 const double raw_limit = normal_distribution(density); | |
1244 | |
1245 // Adjust the raw limit so it becomes the minimum when the density is 1. | |
1246 // | |
1247 // First subtract the adjustment value (which is simply the precomputed value | |
1248 // normal_distribution(1.0)); this yields a value of 0 when the density is 1. | |
1249 // Then add the minimum value, so the minimum is returned when the density is | |
1250 // 1. Finally, prevent negative values, which occur when the mean is not 0.5. | |
1251 const double min = double(min_percent) / 100.0; | |
1252 const double limit = raw_limit - _dwl_adjustment + min; | |
1253 return MAX2(limit, 0.0); | |
1254 } | |
1255 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1256 ParallelCompactData::RegionData* |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1257 PSParallelCompact::first_dead_space_region(const RegionData* beg, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1258 const RegionData* end) |
0 | 1259 { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1260 const size_t region_size = ParallelCompactData::RegionSize; |
0 | 1261 ParallelCompactData& sd = summary_data(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1262 size_t left = sd.region(beg); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1263 size_t right = end > beg ? sd.region(end) - 1 : left; |
0 | 1264 |
1265 // Binary search. | |
1266 while (left < right) { | |
1267 // Equivalent to (left + right) / 2, but does not overflow. | |
1268 const size_t middle = left + (right - left) / 2; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1269 RegionData* const middle_ptr = sd.region(middle); |
0 | 1270 HeapWord* const dest = middle_ptr->destination(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1271 HeapWord* const addr = sd.region_to_addr(middle); |
0 | 1272 assert(dest != NULL, "sanity"); |
1273 assert(dest <= addr, "must move left"); | |
1274 | |
1275 if (middle > left && dest < addr) { | |
1276 right = middle - 1; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1277 } else if (middle < right && middle_ptr->data_size() == region_size) { |
0 | 1278 left = middle + 1; |
1279 } else { | |
1280 return middle_ptr; | |
1281 } | |
1282 } | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1283 return sd.region(left); |
0 | 1284 } |
1285 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1286 ParallelCompactData::RegionData* |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1287 PSParallelCompact::dead_wood_limit_region(const RegionData* beg, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1288 const RegionData* end, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1289 size_t dead_words) |
0 | 1290 { |
1291 ParallelCompactData& sd = summary_data(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1292 size_t left = sd.region(beg); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1293 size_t right = end > beg ? sd.region(end) - 1 : left; |
0 | 1294 |
1295 // Binary search. | |
1296 while (left < right) { | |
1297 // Equivalent to (left + right) / 2, but does not overflow. | |
1298 const size_t middle = left + (right - left) / 2; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1299 RegionData* const middle_ptr = sd.region(middle); |
0 | 1300 HeapWord* const dest = middle_ptr->destination(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1301 HeapWord* const addr = sd.region_to_addr(middle); |
0 | 1302 assert(dest != NULL, "sanity"); |
1303 assert(dest <= addr, "must move left"); | |
1304 | |
1305 const size_t dead_to_left = pointer_delta(addr, dest); | |
1306 if (middle > left && dead_to_left > dead_words) { | |
1307 right = middle - 1; | |
1308 } else if (middle < right && dead_to_left < dead_words) { | |
1309 left = middle + 1; | |
1310 } else { | |
1311 return middle_ptr; | |
1312 } | |
1313 } | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1314 return sd.region(left); |
0 | 1315 } |
1316 | |
1317 // The result is valid during the summary phase, after the initial summarization | |
1318 // of each space into itself, and before final summarization. | |
1319 inline double | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1320 PSParallelCompact::reclaimed_ratio(const RegionData* const cp, |
0 | 1321 HeapWord* const bottom, |
1322 HeapWord* const top, | |
1323 HeapWord* const new_top) | |
1324 { | |
1325 ParallelCompactData& sd = summary_data(); | |
1326 | |
1327 assert(cp != NULL, "sanity"); | |
1328 assert(bottom != NULL, "sanity"); | |
1329 assert(top != NULL, "sanity"); | |
1330 assert(new_top != NULL, "sanity"); | |
1331 assert(top >= new_top, "summary data problem?"); | |
1332 assert(new_top > bottom, "space is empty; should not be here"); | |
1333 assert(new_top >= cp->destination(), "sanity"); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1334 assert(top >= sd.region_to_addr(cp), "sanity"); |
0 | 1335 |
1336 HeapWord* const destination = cp->destination(); | |
1337 const size_t dense_prefix_live = pointer_delta(destination, bottom); | |
1338 const size_t compacted_region_live = pointer_delta(new_top, destination); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1339 const size_t compacted_region_used = pointer_delta(top, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1340 sd.region_to_addr(cp)); |
0 | 1341 const size_t reclaimable = compacted_region_used - compacted_region_live; |
1342 | |
1343 const double divisor = dense_prefix_live + 1.25 * compacted_region_live; | |
1344 return double(reclaimable) / divisor; | |
1345 } | |
1346 | |
1347 // Return the address of the end of the dense prefix, a.k.a. the start of the | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1348 // compacted region. The address is always on a region boundary. |
0 | 1349 // |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1350 // Completely full regions at the left are skipped, since no compaction can |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1351 // occur in those regions. Then the maximum amount of dead wood to allow is |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1352 // computed, based on the density (amount live / capacity) of the generation; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1353 // the region with approximately that amount of dead space to the left is |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1354 // identified as the limit region. Regions between the last completely full |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1355 // region and the limit region are scanned and the one that has the best |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1356 // (maximum) reclaimed_ratio() is selected. |
0 | 1357 HeapWord* |
1358 PSParallelCompact::compute_dense_prefix(const SpaceId id, | |
1359 bool maximum_compaction) | |
1360 { | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1361 if (ParallelOldGCSplitALot) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1362 if (_space_info[id].dense_prefix() != _space_info[id].space()->bottom()) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1363 // The value was chosen to provoke splitting a young gen space; use it. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1364 return _space_info[id].dense_prefix(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1365 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1366 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1367 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1368 const size_t region_size = ParallelCompactData::RegionSize; |
0 | 1369 const ParallelCompactData& sd = summary_data(); |
1370 | |
1371 const MutableSpace* const space = _space_info[id].space(); | |
1372 HeapWord* const top = space->top(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1373 HeapWord* const top_aligned_up = sd.region_align_up(top); |
0 | 1374 HeapWord* const new_top = _space_info[id].new_top(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1375 HeapWord* const new_top_aligned_up = sd.region_align_up(new_top); |
0 | 1376 HeapWord* const bottom = space->bottom(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1377 const RegionData* const beg_cp = sd.addr_to_region_ptr(bottom); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1378 const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1379 const RegionData* const new_top_cp = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1380 sd.addr_to_region_ptr(new_top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1381 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1382 // Skip full regions at the beginning of the space--they are necessarily part |
0 | 1383 // of the dense prefix. |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1384 const RegionData* const full_cp = first_dead_space_region(beg_cp, new_top_cp); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1385 assert(full_cp->destination() == sd.region_to_addr(full_cp) || |
0 | 1386 space->is_empty(), "no dead space allowed to the left"); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1387 assert(full_cp->data_size() < region_size || full_cp == new_top_cp - 1, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1388 "region must have dead space"); |
0 | 1389 |
1390 // The gc number is saved whenever a maximum compaction is done, and used to | |
1391 // determine when the maximum compaction interval has expired. This avoids | |
1392 // successive max compactions for different reasons. | |
1393 assert(total_invocations() >= _maximum_compaction_gc_num, "sanity"); | |
1394 const size_t gcs_since_max = total_invocations() - _maximum_compaction_gc_num; | |
1395 const bool interval_ended = gcs_since_max > HeapMaximumCompactionInterval || | |
1396 total_invocations() == HeapFirstMaximumCompactionCount; | |
1397 if (maximum_compaction || full_cp == top_cp || interval_ended) { | |
1398 _maximum_compaction_gc_num = total_invocations(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1399 return sd.region_to_addr(full_cp); |
0 | 1400 } |
1401 | |
1402 const size_t space_live = pointer_delta(new_top, bottom); | |
1403 const size_t space_used = space->used_in_words(); | |
1404 const size_t space_capacity = space->capacity_in_words(); | |
1405 | |
1406 const double density = double(space_live) / double(space_capacity); | |
1407 const size_t min_percent_free = | |
1408 id == perm_space_id ? PermMarkSweepDeadRatio : MarkSweepDeadRatio; | |
1409 const double limiter = dead_wood_limiter(density, min_percent_free); | |
1410 const size_t dead_wood_max = space_used - space_live; | |
1411 const size_t dead_wood_limit = MIN2(size_t(space_capacity * limiter), | |
1412 dead_wood_max); | |
1413 | |
1414 if (TraceParallelOldGCDensePrefix) { | |
1415 tty->print_cr("space_live=" SIZE_FORMAT " " "space_used=" SIZE_FORMAT " " | |
1416 "space_cap=" SIZE_FORMAT, | |
1417 space_live, space_used, | |
1418 space_capacity); | |
1419 tty->print_cr("dead_wood_limiter(%6.4f, %d)=%6.4f " | |
1420 "dead_wood_max=" SIZE_FORMAT " dead_wood_limit=" SIZE_FORMAT, | |
1421 density, min_percent_free, limiter, | |
1422 dead_wood_max, dead_wood_limit); | |
1423 } | |
1424 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1425 // Locate the region with the desired amount of dead space to the left. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1426 const RegionData* const limit_cp = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1427 dead_wood_limit_region(full_cp, top_cp, dead_wood_limit); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1428 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1429 // Scan from the first region with dead space to the limit region and find the |
0 | 1430 // one with the best (largest) reclaimed ratio. |
1431 double best_ratio = 0.0; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1432 const RegionData* best_cp = full_cp; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1433 for (const RegionData* cp = full_cp; cp < limit_cp; ++cp) { |
0 | 1434 double tmp_ratio = reclaimed_ratio(cp, bottom, top, new_top); |
1435 if (tmp_ratio > best_ratio) { | |
1436 best_cp = cp; | |
1437 best_ratio = tmp_ratio; | |
1438 } | |
1439 } | |
1440 | |
1441 #if 0 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1442 // Something to consider: if the region with the best ratio is 'close to' the |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1443 // first region w/free space, choose the first region with free space |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1444 // ("first-free"). The first-free region is usually near the start of the |
0 | 1445 // heap, which means we are copying most of the heap already, so copy a bit |
1446 // more to get complete compaction. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1447 if (pointer_delta(best_cp, full_cp, sizeof(RegionData)) < 4) { |
0 | 1448 _maximum_compaction_gc_num = total_invocations(); |
1449 best_cp = full_cp; | |
1450 } | |
1451 #endif // #if 0 | |
1452 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1453 return sd.region_to_addr(best_cp); |
0 | 1454 } |
1455 | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1456 #ifndef PRODUCT |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1457 void |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1458 PSParallelCompact::fill_with_live_objects(SpaceId id, HeapWord* const start, |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1459 size_t words) |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1460 { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1461 if (TraceParallelOldGCSummaryPhase) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1462 tty->print_cr("fill_with_live_objects [" PTR_FORMAT " " PTR_FORMAT ") " |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1463 SIZE_FORMAT, start, start + words, words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1464 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1465 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1466 ObjectStartArray* const start_array = _space_info[id].start_array(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1467 CollectedHeap::fill_with_objects(start, words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1468 for (HeapWord* p = start; p < start + words; p += oop(p)->size()) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1469 _mark_bitmap.mark_obj(p, words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1470 _summary_data.add_obj(p, words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1471 start_array->allocate_block(p); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1472 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1473 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1474 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1475 void |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1476 PSParallelCompact::summarize_new_objects(SpaceId id, HeapWord* start) |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1477 { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1478 ParallelCompactData& sd = summary_data(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1479 MutableSpace* space = _space_info[id].space(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1480 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1481 // Find the source and destination start addresses. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1482 HeapWord* const src_addr = sd.region_align_down(start); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1483 HeapWord* dst_addr; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1484 if (src_addr < start) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1485 dst_addr = sd.addr_to_region_ptr(src_addr)->destination(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1486 } else if (src_addr > space->bottom()) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1487 // The start (the original top() value) is aligned to a region boundary so |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1488 // the associated region does not have a destination. Compute the |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1489 // destination from the previous region. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1490 RegionData* const cp = sd.addr_to_region_ptr(src_addr) - 1; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1491 dst_addr = cp->destination() + cp->data_size(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1492 } else { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1493 // Filling the entire space. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1494 dst_addr = space->bottom(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1495 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1496 assert(dst_addr != NULL, "sanity"); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1497 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1498 // Update the summary data. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1499 bool result = _summary_data.summarize(_space_info[id].split_info(), |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1500 src_addr, space->top(), NULL, |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1501 dst_addr, space->end(), |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1502 _space_info[id].new_top_addr()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1503 assert(result, "should not fail: bad filler object size"); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1504 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1505 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1506 void |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1507 PSParallelCompact::provoke_split_fill_survivor(SpaceId id) |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1508 { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1509 if (total_invocations() % (ParallelOldGCSplitInterval * 3) != 0) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1510 return; |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1511 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1512 |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1513 MutableSpace* const space = _space_info[id].space(); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1514 if (space->is_empty()) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1515 HeapWord* b = space->bottom(); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1516 HeapWord* t = b + space->capacity_in_words() / 2; |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1517 space->set_top(t); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1518 if (ZapUnusedHeapArea) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1519 space->set_top_for_allocations(); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1520 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1521 |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1522 size_t min_size = CollectedHeap::min_fill_size(); |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1523 size_t obj_len = min_size; |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1524 while (b + obj_len <= t) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1525 CollectedHeap::fill_with_object(b, obj_len); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1526 mark_bitmap()->mark_obj(b, obj_len); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1527 summary_data().add_obj(b, obj_len); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1528 b += obj_len; |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1529 obj_len = (obj_len & (min_size*3)) + min_size; // 8 16 24 32 8 16 24 32 ... |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1530 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1531 if (b < t) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1532 // The loop didn't completely fill to t (top); adjust top downward. |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1533 space->set_top(b); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1534 if (ZapUnusedHeapArea) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1535 space->set_top_for_allocations(); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1536 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1537 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1538 |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1539 HeapWord** nta = _space_info[id].new_top_addr(); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1540 bool result = summary_data().summarize(_space_info[id].split_info(), |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1541 space->bottom(), space->top(), NULL, |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1542 space->bottom(), space->end(), nta); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1543 assert(result, "space must fit into itself"); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1544 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1545 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1546 |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1547 void |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1548 PSParallelCompact::provoke_split(bool & max_compaction) |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1549 { |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1550 if (total_invocations() % ParallelOldGCSplitInterval != 0) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1551 return; |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1552 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1553 |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1554 const size_t region_size = ParallelCompactData::RegionSize; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1555 ParallelCompactData& sd = summary_data(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1556 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1557 MutableSpace* const eden_space = _space_info[eden_space_id].space(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1558 MutableSpace* const from_space = _space_info[from_space_id].space(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1559 const size_t eden_live = pointer_delta(eden_space->top(), |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1560 _space_info[eden_space_id].new_top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1561 const size_t from_live = pointer_delta(from_space->top(), |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1562 _space_info[from_space_id].new_top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1563 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1564 const size_t min_fill_size = CollectedHeap::min_fill_size(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1565 const size_t eden_free = pointer_delta(eden_space->end(), eden_space->top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1566 const size_t eden_fillable = eden_free >= min_fill_size ? eden_free : 0; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1567 const size_t from_free = pointer_delta(from_space->end(), from_space->top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1568 const size_t from_fillable = from_free >= min_fill_size ? from_free : 0; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1569 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1570 // Choose the space to split; need at least 2 regions live (or fillable). |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1571 SpaceId id; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1572 MutableSpace* space; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1573 size_t live_words; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1574 size_t fill_words; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1575 if (eden_live + eden_fillable >= region_size * 2) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1576 id = eden_space_id; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1577 space = eden_space; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1578 live_words = eden_live; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1579 fill_words = eden_fillable; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1580 } else if (from_live + from_fillable >= region_size * 2) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1581 id = from_space_id; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1582 space = from_space; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1583 live_words = from_live; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1584 fill_words = from_fillable; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1585 } else { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1586 return; // Give up. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1587 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1588 assert(fill_words == 0 || fill_words >= min_fill_size, "sanity"); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1589 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1590 if (live_words < region_size * 2) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1591 // Fill from top() to end() w/live objects of mixed sizes. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1592 HeapWord* const fill_start = space->top(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1593 live_words += fill_words; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1594 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1595 space->set_top(fill_start + fill_words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1596 if (ZapUnusedHeapArea) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1597 space->set_top_for_allocations(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1598 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1599 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1600 HeapWord* cur_addr = fill_start; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1601 while (fill_words > 0) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1602 const size_t r = (size_t)os::random() % (region_size / 2) + min_fill_size; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1603 size_t cur_size = MIN2(align_object_size_(r), fill_words); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1604 if (fill_words - cur_size < min_fill_size) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1605 cur_size = fill_words; // Avoid leaving a fragment too small to fill. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1606 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1607 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1608 CollectedHeap::fill_with_object(cur_addr, cur_size); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1609 mark_bitmap()->mark_obj(cur_addr, cur_size); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1610 sd.add_obj(cur_addr, cur_size); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1611 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1612 cur_addr += cur_size; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1613 fill_words -= cur_size; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1614 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1615 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1616 summarize_new_objects(id, fill_start); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1617 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1618 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1619 max_compaction = false; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1620 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1621 // Manipulate the old gen so that it has room for about half of the live data |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1622 // in the target young gen space (live_words / 2). |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1623 id = old_space_id; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1624 space = _space_info[id].space(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1625 const size_t free_at_end = space->free_in_words(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1626 const size_t free_target = align_object_size(live_words / 2); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1627 const size_t dead = pointer_delta(space->top(), _space_info[id].new_top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1628 |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1629 if (free_at_end >= free_target + min_fill_size) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1630 // Fill space above top() and set the dense prefix so everything survives. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1631 HeapWord* const fill_start = space->top(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1632 const size_t fill_size = free_at_end - free_target; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1633 space->set_top(space->top() + fill_size); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1634 if (ZapUnusedHeapArea) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1635 space->set_top_for_allocations(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1636 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1637 fill_with_live_objects(id, fill_start, fill_size); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1638 summarize_new_objects(id, fill_start); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1639 _space_info[id].set_dense_prefix(sd.region_align_down(space->top())); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1640 } else if (dead + free_at_end > free_target) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1641 // Find a dense prefix that makes the right amount of space available. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1642 HeapWord* cur = sd.region_align_down(space->top()); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1643 HeapWord* cur_destination = sd.addr_to_region_ptr(cur)->destination(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1644 size_t dead_to_right = pointer_delta(space->end(), cur_destination); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1645 while (dead_to_right < free_target) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1646 cur -= region_size; |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1647 cur_destination = sd.addr_to_region_ptr(cur)->destination(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1648 dead_to_right = pointer_delta(space->end(), cur_destination); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1649 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1650 _space_info[id].set_dense_prefix(cur); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1651 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1652 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1653 #endif // #ifndef PRODUCT |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1654 |
0 | 1655 void PSParallelCompact::summarize_spaces_quick() |
1656 { | |
1657 for (unsigned int i = 0; i < last_space_id; ++i) { | |
1658 const MutableSpace* space = _space_info[i].space(); | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1659 HeapWord** nta = _space_info[i].new_top_addr(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1660 bool result = _summary_data.summarize(_space_info[i].split_info(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1661 space->bottom(), space->top(), NULL, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1662 space->bottom(), space->end(), nta); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1663 assert(result, "space must fit into itself"); |
0 | 1664 _space_info[i].set_dense_prefix(space->bottom()); |
1665 } | |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1666 |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1667 #ifndef PRODUCT |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1668 if (ParallelOldGCSplitALot) { |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1669 provoke_split_fill_survivor(to_space_id); |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1670 } |
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1671 #endif // #ifndef PRODUCT |
0 | 1672 } |
1673 | |
1674 void PSParallelCompact::fill_dense_prefix_end(SpaceId id) | |
1675 { | |
1676 HeapWord* const dense_prefix_end = dense_prefix(id); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1677 const RegionData* region = _summary_data.addr_to_region_ptr(dense_prefix_end); |
0 | 1678 const idx_t dense_prefix_bit = _mark_bitmap.addr_to_bit(dense_prefix_end); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1679 if (dead_space_crosses_boundary(region, dense_prefix_bit)) { |
0 | 1680 // Only enough dead space is filled so that any remaining dead space to the |
1681 // left is larger than the minimum filler object. (The remainder is filled | |
1682 // during the copy/update phase.) | |
1683 // | |
1684 // The size of the dead space to the right of the boundary is not a | |
1685 // concern, since compaction will be able to use whatever space is | |
1686 // available. | |
1687 // | |
1688 // Here '||' is the boundary, 'x' represents a don't care bit and a box | |
1689 // surrounds the space to be filled with an object. | |
1690 // | |
1691 // In the 32-bit VM, each bit represents two 32-bit words: | |
1692 // +---+ | |
1693 // a) beg_bits: ... x x x | 0 | || 0 x x ... | |
1694 // end_bits: ... x x x | 0 | || 0 x x ... | |
1695 // +---+ | |
1696 // | |
1697 // In the 64-bit VM, each bit represents one 64-bit word: | |
1698 // +------------+ | |
1699 // b) beg_bits: ... x x x | 0 || 0 | x x ... | |
1700 // end_bits: ... x x 1 | 0 || 0 | x x ... | |
1701 // +------------+ | |
1702 // +-------+ | |
1703 // c) beg_bits: ... x x | 0 0 | || 0 x x ... | |
1704 // end_bits: ... x 1 | 0 0 | || 0 x x ... | |
1705 // +-------+ | |
1706 // +-----------+ | |
1707 // d) beg_bits: ... x | 0 0 0 | || 0 x x ... | |
1708 // end_bits: ... 1 | 0 0 0 | || 0 x x ... | |
1709 // +-----------+ | |
1710 // +-------+ | |
1711 // e) beg_bits: ... 0 0 | 0 0 | || 0 x x ... | |
1712 // end_bits: ... 0 0 | 0 0 | || 0 x x ... | |
1713 // +-------+ | |
1714 | |
1715 // Initially assume case a, c or e will apply. | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1716 size_t obj_len = CollectedHeap::min_fill_size(); |
0 | 1717 HeapWord* obj_beg = dense_prefix_end - obj_len; |
1718 | |
1719 #ifdef _LP64 | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1720 if (MinObjAlignment > 1) { // object alignment > heap word size |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1721 // Cases a, c or e. |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1489
diff
changeset
|
1722 } else if (_mark_bitmap.is_obj_end(dense_prefix_bit - 2)) { |
0 | 1723 // Case b above. |
1724 obj_beg = dense_prefix_end - 1; | |
1725 } else if (!_mark_bitmap.is_obj_end(dense_prefix_bit - 3) && | |
1726 _mark_bitmap.is_obj_end(dense_prefix_bit - 4)) { | |
1727 // Case d above. | |
1728 obj_beg = dense_prefix_end - 3; | |
1729 obj_len = 3; | |
1730 } | |
1731 #endif // #ifdef _LP64 | |
1732 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1733 CollectedHeap::fill_with_object(obj_beg, obj_len); |
0 | 1734 _mark_bitmap.mark_obj(obj_beg, obj_len); |
1735 _summary_data.add_obj(obj_beg, obj_len); | |
1736 assert(start_array(id) != NULL, "sanity"); | |
1737 start_array(id)->allocate_block(obj_beg); | |
1738 } | |
1739 } | |
1740 | |
1741 void | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1742 PSParallelCompact::clear_source_region(HeapWord* beg_addr, HeapWord* end_addr) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1743 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1744 RegionData* const beg_ptr = _summary_data.addr_to_region_ptr(beg_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1745 HeapWord* const end_aligned_up = _summary_data.region_align_up(end_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1746 RegionData* const end_ptr = _summary_data.addr_to_region_ptr(end_aligned_up); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1747 for (RegionData* cur = beg_ptr; cur < end_ptr; ++cur) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1748 cur->set_source_region(0); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1749 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1750 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1751 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1752 void |
0 | 1753 PSParallelCompact::summarize_space(SpaceId id, bool maximum_compaction) |
1754 { | |
1755 assert(id < last_space_id, "id out of range"); | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1756 assert(_space_info[id].dense_prefix() == _space_info[id].space()->bottom() || |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1757 ParallelOldGCSplitALot && id == old_space_id, |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1758 "should have been reset in summarize_spaces_quick()"); |
0 | 1759 |
1760 const MutableSpace* space = _space_info[id].space(); | |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1761 if (_space_info[id].new_top() != space->bottom()) { |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1762 HeapWord* dense_prefix_end = compute_dense_prefix(id, maximum_compaction); |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1763 _space_info[id].set_dense_prefix(dense_prefix_end); |
0 | 1764 |
1765 #ifndef PRODUCT | |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1766 if (TraceParallelOldGCDensePrefix) { |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1767 print_dense_prefix_stats("ratio", id, maximum_compaction, |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1768 dense_prefix_end); |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1769 HeapWord* addr = compute_dense_prefix_via_density(id, maximum_compaction); |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1770 print_dense_prefix_stats("density", id, maximum_compaction, addr); |
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1771 } |
0 | 1772 #endif // #ifndef PRODUCT |
1773 | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1774 // Recompute the summary data, taking into account the dense prefix. If |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1775 // every last byte will be reclaimed, then the existing summary data which |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1776 // compacts everything can be left in place. |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1777 if (!maximum_compaction && dense_prefix_end != space->bottom()) { |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1778 // If dead space crosses the dense prefix boundary, it is (at least |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1779 // partially) filled with a dummy object, marked live and added to the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1780 // summary data. This simplifies the copy/update phase and must be done |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1781 // before the final locations of objects are determined, to prevent |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1782 // leaving a fragment of dead space that is too small to fill. |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1783 fill_dense_prefix_end(id); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1784 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1785 // Compute the destination of each Region, and thus each object. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1786 _summary_data.summarize_dense_prefix(space->bottom(), dense_prefix_end); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1787 _summary_data.summarize(_space_info[id].split_info(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1788 dense_prefix_end, space->top(), NULL, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1789 dense_prefix_end, space->end(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1790 _space_info[id].new_top_addr()); |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1791 } |
0 | 1792 } |
1793 | |
1794 if (TraceParallelOldGCSummaryPhase) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1795 const size_t region_size = ParallelCompactData::RegionSize; |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1796 HeapWord* const dense_prefix_end = _space_info[id].dense_prefix(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1797 const size_t dp_region = _summary_data.addr_to_region_idx(dense_prefix_end); |
0 | 1798 const size_t dp_words = pointer_delta(dense_prefix_end, space->bottom()); |
265
f88815ca1af1
6483129: par compact assertion failure (new_top > bottom)
jcoomes
parents:
264
diff
changeset
|
1799 HeapWord* const new_top = _space_info[id].new_top(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1800 const HeapWord* nt_aligned_up = _summary_data.region_align_up(new_top); |
0 | 1801 const size_t cr_words = pointer_delta(nt_aligned_up, dense_prefix_end); |
1802 tty->print_cr("id=%d cap=" SIZE_FORMAT " dp=" PTR_FORMAT " " | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1803 "dp_region=" SIZE_FORMAT " " "dp_count=" SIZE_FORMAT " " |
0 | 1804 "cr_count=" SIZE_FORMAT " " "nt=" PTR_FORMAT, |
1805 id, space->capacity_in_words(), dense_prefix_end, | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1806 dp_region, dp_words / region_size, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1807 cr_words / region_size, new_top); |
0 | 1808 } |
1809 } | |
1810 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1811 #ifndef PRODUCT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1812 void PSParallelCompact::summary_phase_msg(SpaceId dst_space_id, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1813 HeapWord* dst_beg, HeapWord* dst_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1814 SpaceId src_space_id, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1815 HeapWord* src_beg, HeapWord* src_end) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1816 { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1817 if (TraceParallelOldGCSummaryPhase) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1818 tty->print_cr("summarizing %d [%s] into %d [%s]: " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1819 "src=" PTR_FORMAT "-" PTR_FORMAT " " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1820 SIZE_FORMAT "-" SIZE_FORMAT " " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1821 "dst=" PTR_FORMAT "-" PTR_FORMAT " " |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1822 SIZE_FORMAT "-" SIZE_FORMAT, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1823 src_space_id, space_names[src_space_id], |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1824 dst_space_id, space_names[dst_space_id], |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1825 src_beg, src_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1826 _summary_data.addr_to_region_idx(src_beg), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1827 _summary_data.addr_to_region_idx(src_end), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1828 dst_beg, dst_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1829 _summary_data.addr_to_region_idx(dst_beg), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1830 _summary_data.addr_to_region_idx(dst_end)); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1831 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1832 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1833 #endif // #ifndef PRODUCT |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1834 |
0 | 1835 void PSParallelCompact::summary_phase(ParCompactionManager* cm, |
1836 bool maximum_compaction) | |
1837 { | |
1838 EventMark m("2 summarize"); | |
1839 TraceTime tm("summary phase", print_phases(), true, gclog_or_tty); | |
1840 // trace("2"); | |
1841 | |
1842 #ifdef ASSERT | |
1843 if (TraceParallelOldGCMarkingPhase) { | |
1844 tty->print_cr("add_obj_count=" SIZE_FORMAT " " | |
1845 "add_obj_bytes=" SIZE_FORMAT, | |
1846 add_obj_count, add_obj_size * HeapWordSize); | |
1847 tty->print_cr("mark_bitmap_count=" SIZE_FORMAT " " | |
1848 "mark_bitmap_bytes=" SIZE_FORMAT, | |
1849 mark_bitmap_count, mark_bitmap_size * HeapWordSize); | |
1850 } | |
1851 #endif // #ifdef ASSERT | |
1852 | |
1853 // Quick summarization of each space into itself, to see how much is live. | |
1854 summarize_spaces_quick(); | |
1855 | |
1856 if (TraceParallelOldGCSummaryPhase) { | |
1857 tty->print_cr("summary_phase: after summarizing each space to self"); | |
1858 Universe::print(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1859 NOT_PRODUCT(print_region_ranges()); |
0 | 1860 if (Verbose) { |
1861 NOT_PRODUCT(print_initial_summary_data(_summary_data, _space_info)); | |
1862 } | |
1863 } | |
1864 | |
1865 // The amount of live data that will end up in old space (assuming it fits). | |
1866 size_t old_space_total_live = 0; | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1867 assert(perm_space_id < old_space_id, "should not count perm data here"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1868 for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
0 | 1869 old_space_total_live += pointer_delta(_space_info[id].new_top(), |
1870 _space_info[id].space()->bottom()); | |
1871 } | |
1872 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1873 MutableSpace* const old_space = _space_info[old_space_id].space(); |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1874 const size_t old_capacity = old_space->capacity_in_words(); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1875 if (old_space_total_live > old_capacity) { |
0 | 1876 // XXX - should also try to expand |
1877 maximum_compaction = true; | |
1878 } | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1879 #ifndef PRODUCT |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1880 if (ParallelOldGCSplitALot && old_space_total_live < old_capacity) { |
496
b27c885f75f9
6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents:
495
diff
changeset
|
1881 provoke_split(maximum_compaction); |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1882 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
482
diff
changeset
|
1883 #endif // #ifndef PRODUCT |
0 | 1884 |
1885 // Permanent and Old generations. | |
1886 summarize_space(perm_space_id, maximum_compaction); | |
1887 summarize_space(old_space_id, maximum_compaction); | |
1888 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1889 // Summarize the remaining spaces in the young gen. The initial target space |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1890 // is the old gen. If a space does not fit entirely into the target, then the |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1891 // remainder is compacted into the space itself and that space becomes the new |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1892 // target. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1893 SpaceId dst_space_id = old_space_id; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1894 HeapWord* dst_space_end = old_space->end(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1895 HeapWord** new_top_addr = _space_info[dst_space_id].new_top_addr(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1896 for (unsigned int id = eden_space_id; id < last_space_id; ++id) { |
0 | 1897 const MutableSpace* space = _space_info[id].space(); |
1898 const size_t live = pointer_delta(_space_info[id].new_top(), | |
1899 space->bottom()); | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1900 const size_t available = pointer_delta(dst_space_end, *new_top_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1901 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1902 NOT_PRODUCT(summary_phase_msg(dst_space_id, *new_top_addr, dst_space_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1903 SpaceId(id), space->bottom(), space->top());) |
266
2214b226b7f0
6724367: par compact could clear less young gen summary data
jcoomes
parents:
265
diff
changeset
|
1904 if (live > 0 && live <= available) { |
0 | 1905 // All the live data will fit. |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1906 bool done = _summary_data.summarize(_space_info[id].split_info(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1907 space->bottom(), space->top(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1908 NULL, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1909 *new_top_addr, dst_space_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1910 new_top_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1911 assert(done, "space must fit into old gen"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1912 |
266
2214b226b7f0
6724367: par compact could clear less young gen summary data
jcoomes
parents:
265
diff
changeset
|
1913 // Reset the new_top value for the space. |
2214b226b7f0
6724367: par compact could clear less young gen summary data
jcoomes
parents:
265
diff
changeset
|
1914 _space_info[id].set_new_top(space->bottom()); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1915 } else if (live > 0) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1916 // Attempt to fit part of the source space into the target space. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1917 HeapWord* next_src_addr = NULL; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1918 bool done = _summary_data.summarize(_space_info[id].split_info(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1919 space->bottom(), space->top(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1920 &next_src_addr, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1921 *new_top_addr, dst_space_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1922 new_top_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1923 assert(!done, "space should not fit into old gen"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1924 assert(next_src_addr != NULL, "sanity"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1925 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1926 // The source space becomes the new target, so the remainder is compacted |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1927 // within the space itself. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1928 dst_space_id = SpaceId(id); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1929 dst_space_end = space->end(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1930 new_top_addr = _space_info[id].new_top_addr(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1931 NOT_PRODUCT(summary_phase_msg(dst_space_id, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1932 space->bottom(), dst_space_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1933 SpaceId(id), next_src_addr, space->top());) |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1934 done = _summary_data.summarize(_space_info[id].split_info(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1935 next_src_addr, space->top(), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1936 NULL, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1937 space->bottom(), dst_space_end, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1938 new_top_addr); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1939 assert(done, "space must fit when compacted into itself"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
1940 assert(*new_top_addr <= space->top(), "usage should not grow"); |
0 | 1941 } |
1942 } | |
1943 | |
1944 if (TraceParallelOldGCSummaryPhase) { | |
1945 tty->print_cr("summary_phase: after final summarization"); | |
1946 Universe::print(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1947 NOT_PRODUCT(print_region_ranges()); |
0 | 1948 if (Verbose) { |
1949 NOT_PRODUCT(print_generic_summary_data(_summary_data, _space_info)); | |
1950 } | |
1951 } | |
1952 } | |
1953 | |
1954 // This method should contain all heap-specific policy for invoking a full | |
1955 // collection. invoke_no_policy() will only attempt to compact the heap; it | |
1956 // will do nothing further. If we need to bail out for policy reasons, scavenge | |
1957 // before full gc, or any other specialized behavior, it needs to be added here. | |
1958 // | |
1959 // Note that this method should only be called from the vm_thread while at a | |
1960 // safepoint. | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1961 // |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1962 // Note that the all_soft_refs_clear flag in the collector policy |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1963 // may be true because this method can be called without intervening |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1964 // activity. For example when the heap space is tight and full measure |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1965 // are being taken to free space. |
0 | 1966 void PSParallelCompact::invoke(bool maximum_heap_compaction) { |
1967 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); | |
1968 assert(Thread::current() == (Thread*)VMThread::vm_thread(), | |
1969 "should be in vm thread"); | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1970 |
0 | 1971 ParallelScavengeHeap* heap = gc_heap(); |
1972 GCCause::Cause gc_cause = heap->gc_cause(); | |
1973 assert(!heap->is_gc_active(), "not reentrant"); | |
1974 | |
1975 PSAdaptiveSizePolicy* policy = heap->size_policy(); | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1976 IsGCActiveMark mark; |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1977 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1978 if (ScavengeBeforeFullGC) { |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1979 PSScavenge::invoke_no_policy(); |
0 | 1980 } |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1981 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1982 const bool clear_all_soft_refs = |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1983 heap->collector_policy()->should_clear_all_soft_refs(); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1984 |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1985 PSParallelCompact::invoke_no_policy(clear_all_soft_refs || |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
1986 maximum_heap_compaction); |
0 | 1987 } |
1988 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1989 bool ParallelCompactData::region_contains(size_t region_index, HeapWord* addr) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1990 size_t addr_region_index = addr_to_region_idx(addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
1991 return region_index == addr_region_index; |
0 | 1992 } |
1993 | |
1994 // This method contains no policy. You should probably | |
1995 // be calling invoke() instead. | |
1996 void PSParallelCompact::invoke_no_policy(bool maximum_heap_compaction) { | |
1997 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
1998 assert(ref_processor() != NULL, "Sanity"); | |
1999 | |
139
c0492d52d55b
6539517: CR 6186200 should be extended to perm gen allocation to prevent spurious OOM's from perm gen
apetrusenko
parents:
0
diff
changeset
|
2000 if (GC_locker::check_active_before_gc()) { |
0 | 2001 return; |
2002 } | |
2003 | |
2004 TimeStamp marking_start; | |
2005 TimeStamp compaction_start; | |
2006 TimeStamp collection_exit; | |
2007 | |
2008 ParallelScavengeHeap* heap = gc_heap(); | |
2009 GCCause::Cause gc_cause = heap->gc_cause(); | |
2010 PSYoungGen* young_gen = heap->young_gen(); | |
2011 PSOldGen* old_gen = heap->old_gen(); | |
2012 PSPermGen* perm_gen = heap->perm_gen(); | |
2013 PSAdaptiveSizePolicy* size_policy = heap->size_policy(); | |
2014 | |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2015 // The scope of casr should end after code that can change |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2016 // CollectorPolicy::_should_clear_all_soft_refs. |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2017 ClearedAllSoftRefs casr(maximum_heap_compaction, |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2018 heap->collector_policy()); |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2019 |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2020 if (ZapUnusedHeapArea) { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2021 // Save information needed to minimize mangling |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2022 heap->record_gen_tops_before_GC(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2023 } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2024 |
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
546
diff
changeset
|
2025 heap->pre_full_gc_dump(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
546
diff
changeset
|
2026 |
0 | 2027 _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes; |
2028 | |
2029 // Make sure data structures are sane, make the heap parsable, and do other | |
2030 // miscellaneous bookkeeping. | |
2031 PreGCValues pre_gc_values; | |
2032 pre_compact(&pre_gc_values); | |
2033 | |
210 | 2034 // Get the compaction manager reserved for the VM thread. |
2035 ParCompactionManager* const vmthread_cm = | |
2036 ParCompactionManager::manager_array(gc_task_manager()->workers()); | |
2037 | |
0 | 2038 // Place after pre_compact() where the number of invocations is incremented. |
2039 AdaptiveSizePolicyOutput(size_policy, heap->total_collections()); | |
2040 | |
2041 { | |
2042 ResourceMark rm; | |
2043 HandleMark hm; | |
2044 | |
2045 const bool is_system_gc = gc_cause == GCCause::_java_lang_system_gc; | |
2046 | |
2047 // This is useful for debugging but don't change the output the | |
2048 // the customer sees. | |
2049 const char* gc_cause_str = "Full GC"; | |
2050 if (is_system_gc && PrintGCDetails) { | |
2051 gc_cause_str = "Full GC (System)"; | |
2052 } | |
2053 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); | |
2054 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); | |
2055 TraceTime t1(gc_cause_str, PrintGC, !PrintGCDetails, gclog_or_tty); | |
2056 TraceCollectorStats tcs(counters()); | |
2057 TraceMemoryManagerStats tms(true /* Full GC */); | |
2058 | |
2059 if (TraceGen1Time) accumulated_time()->start(); | |
2060 | |
2061 // Let the size policy know we're starting | |
2062 size_policy->major_collection_begin(); | |
2063 | |
2064 // When collecting the permanent generation methodOops may be moving, | |
2065 // so we either have to flush all bcp data or convert it into bci. | |
2066 CodeCache::gc_prologue(); | |
2067 Threads::gc_prologue(); | |
2068 | |
2069 NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); | |
2070 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
2071 | |
2072 ref_processor()->enable_discovery(); | |
457
27a80744a83b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
453
diff
changeset
|
2073 ref_processor()->setup_policy(maximum_heap_compaction); |
0 | 2074 |
2075 bool marked_for_unloading = false; | |
2076 | |
2077 marking_start.update(); | |
210 | 2078 marking_phase(vmthread_cm, maximum_heap_compaction); |
0 | 2079 |
2080 #ifndef PRODUCT | |
2081 if (TraceParallelOldGCMarkingPhase) { | |
2082 gclog_or_tty->print_cr("marking_phase: cas_tries %d cas_retries %d " | |
2083 "cas_by_another %d", | |
2084 mark_bitmap()->cas_tries(), mark_bitmap()->cas_retries(), | |
2085 mark_bitmap()->cas_by_another()); | |
2086 } | |
2087 #endif // #ifndef PRODUCT | |
2088 | |
2089 bool max_on_system_gc = UseMaximumCompactionOnSystemGC && is_system_gc; | |
210 | 2090 summary_phase(vmthread_cm, maximum_heap_compaction || max_on_system_gc); |
0 | 2091 |
2092 COMPILER2_PRESENT(assert(DerivedPointerTable::is_active(), "Sanity")); | |
2093 COMPILER2_PRESENT(DerivedPointerTable::set_active(false)); | |
2094 | |
2095 // adjust_roots() updates Universe::_intArrayKlassObj which is | |
2096 // needed by the compaction for filling holes in the dense prefix. | |
2097 adjust_roots(); | |
2098 | |
2099 compaction_start.update(); | |
2100 // Does the perm gen always have to be done serially because | |
2101 // klasses are used in the update of an object? | |
210 | 2102 compact_perm(vmthread_cm); |
0 | 2103 |
2104 if (UseParallelOldGCCompacting) { | |
2105 compact(); | |
2106 } else { | |
210 | 2107 compact_serial(vmthread_cm); |
0 | 2108 } |
2109 | |
2110 // Reset the mark bitmap, summary data, and do other bookkeeping. Must be | |
2111 // done before resizing. | |
2112 post_compact(); | |
2113 | |
2114 // Let the size policy know we're done | |
2115 size_policy->major_collection_end(old_gen->used_in_bytes(), gc_cause); | |
2116 | |
2117 if (UseAdaptiveSizePolicy) { | |
2118 if (PrintAdaptiveSizePolicy) { | |
2119 gclog_or_tty->print("AdaptiveSizeStart: "); | |
2120 gclog_or_tty->stamp(); | |
2121 gclog_or_tty->print_cr(" collection: %d ", | |
2122 heap->total_collections()); | |
2123 if (Verbose) { | |
2124 gclog_or_tty->print("old_gen_capacity: %d young_gen_capacity: %d" | |
2125 " perm_gen_capacity: %d ", | |
2126 old_gen->capacity_in_bytes(), young_gen->capacity_in_bytes(), | |
2127 perm_gen->capacity_in_bytes()); | |
2128 } | |
2129 } | |
2130 | |
2131 // Don't check if the size_policy is ready here. Let | |
2132 // the size_policy check that internally. | |
2133 if (UseAdaptiveGenerationSizePolicyAtMajorCollection && | |
2134 ((gc_cause != GCCause::_java_lang_system_gc) || | |
2135 UseAdaptiveSizePolicyWithSystemGC)) { | |
2136 // Calculate optimal free space amounts | |
2137 assert(young_gen->max_size() > | |
2138 young_gen->from_space()->capacity_in_bytes() + | |
2139 young_gen->to_space()->capacity_in_bytes(), | |
2140 "Sizes of space in young gen are out-of-bounds"); | |
2141 size_t max_eden_size = young_gen->max_size() - | |
2142 young_gen->from_space()->capacity_in_bytes() - | |
2143 young_gen->to_space()->capacity_in_bytes(); | |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2144 size_policy->compute_generation_free_space( |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2145 young_gen->used_in_bytes(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2146 young_gen->eden_space()->used_in_bytes(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2147 old_gen->used_in_bytes(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2148 perm_gen->used_in_bytes(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2149 young_gen->eden_space()->capacity_in_bytes(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2150 old_gen->max_gen_size(), |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2151 max_eden_size, |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2152 true /* full gc*/, |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2153 gc_cause, |
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1311
diff
changeset
|
2154 heap->collector_policy()); |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2155 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2156 heap->resize_old_gen( |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2157 size_policy->calculated_old_free_size_in_bytes()); |
0 | 2158 |
2159 // Don't resize the young generation at an major collection. A | |
2160 // desired young generation size may have been calculated but | |
2161 // resizing the young generation complicates the code because the | |
2162 // resizing of the old generation may have moved the boundary | |
2163 // between the young generation and the old generation. Let the | |
2164 // young generation resizing happen at the minor collections. | |
2165 } | |
2166 if (PrintAdaptiveSizePolicy) { | |
2167 gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ", | |
2168 heap->total_collections()); | |
2169 } | |
2170 } | |
2171 | |
2172 if (UsePerfData) { | |
2173 PSGCAdaptivePolicyCounters* const counters = heap->gc_policy_counters(); | |
2174 counters->update_counters(); | |
2175 counters->update_old_capacity(old_gen->capacity_in_bytes()); | |
2176 counters->update_young_capacity(young_gen->capacity_in_bytes()); | |
2177 } | |
2178 | |
2179 heap->resize_all_tlabs(); | |
2180 | |
2181 // We collected the perm gen, so we'll resize it here. | |
2182 perm_gen->compute_new_size(pre_gc_values.perm_gen_used()); | |
2183 | |
2184 if (TraceGen1Time) accumulated_time()->stop(); | |
2185 | |
2186 if (PrintGC) { | |
2187 if (PrintGCDetails) { | |
2188 // No GC timestamp here. This is after GC so it would be confusing. | |
2189 young_gen->print_used_change(pre_gc_values.young_gen_used()); | |
2190 old_gen->print_used_change(pre_gc_values.old_gen_used()); | |
2191 heap->print_heap_change(pre_gc_values.heap_used()); | |
2192 // Print perm gen last (print_heap_change() excludes the perm gen). | |
2193 perm_gen->print_used_change(pre_gc_values.perm_gen_used()); | |
2194 } else { | |
2195 heap->print_heap_change(pre_gc_values.heap_used()); | |
2196 } | |
2197 } | |
2198 | |
2199 // Track memory usage and detect low memory | |
2200 MemoryService::track_memory_usage(); | |
2201 heap->update_counters(); | |
2202 } | |
2203 | |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2204 #ifdef ASSERT |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2205 for (size_t i = 0; i < ParallelGCThreads + 1; ++i) { |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2206 ParCompactionManager* const cm = |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2207 ParCompactionManager::manager_array(int(i)); |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2208 assert(cm->marking_stack()->is_empty(), "should be empty"); |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2209 assert(cm->region_stack()->is_empty(), "should be empty"); |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2210 assert(cm->revisit_klass_stack()->is_empty(), "should be empty"); |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2211 } |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2212 #endif // ASSERT |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2213 |
0 | 2214 if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) { |
2215 HandleMark hm; // Discard invalid handles created during verification | |
2216 gclog_or_tty->print(" VerifyAfterGC:"); | |
2217 Universe::verify(false); | |
2218 } | |
2219 | |
2220 // Re-verify object start arrays | |
2221 if (VerifyObjectStartArray && | |
2222 VerifyAfterGC) { | |
2223 old_gen->verify_object_start_array(); | |
2224 perm_gen->verify_object_start_array(); | |
2225 } | |
2226 | |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2227 if (ZapUnusedHeapArea) { |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2228 old_gen->object_space()->check_mangled_unused_area_complete(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2229 perm_gen->object_space()->check_mangled_unused_area_complete(); |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2230 } |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
210
diff
changeset
|
2231 |
0 | 2232 NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); |
2233 | |
2234 collection_exit.update(); | |
2235 | |
2236 if (PrintHeapAtGC) { | |
2237 Universe::print_heap_after_gc(); | |
2238 } | |
2239 if (PrintGCTaskTimeStamps) { | |
2240 gclog_or_tty->print_cr("VM-Thread " INT64_FORMAT " " INT64_FORMAT " " | |
2241 INT64_FORMAT, | |
2242 marking_start.ticks(), compaction_start.ticks(), | |
2243 collection_exit.ticks()); | |
2244 gc_task_manager()->print_task_time_stamps(); | |
2245 } | |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
496
diff
changeset
|
2246 |
615
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
546
diff
changeset
|
2247 heap->post_full_gc_dump(); |
c6c601a0f2d6
6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents:
546
diff
changeset
|
2248 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
496
diff
changeset
|
2249 #ifdef TRACESPINNING |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
496
diff
changeset
|
2250 ParallelTaskTerminator::print_termination_counts(); |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
496
diff
changeset
|
2251 #endif |
0 | 2252 } |
2253 | |
2254 bool PSParallelCompact::absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy, | |
2255 PSYoungGen* young_gen, | |
2256 PSOldGen* old_gen) { | |
2257 MutableSpace* const eden_space = young_gen->eden_space(); | |
2258 assert(!eden_space->is_empty(), "eden must be non-empty"); | |
2259 assert(young_gen->virtual_space()->alignment() == | |
2260 old_gen->virtual_space()->alignment(), "alignments do not match"); | |
2261 | |
2262 if (!(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary)) { | |
2263 return false; | |
2264 } | |
2265 | |
2266 // Both generations must be completely committed. | |
2267 if (young_gen->virtual_space()->uncommitted_size() != 0) { | |
2268 return false; | |
2269 } | |
2270 if (old_gen->virtual_space()->uncommitted_size() != 0) { | |
2271 return false; | |
2272 } | |
2273 | |
2274 // Figure out how much to take from eden. Include the average amount promoted | |
2275 // in the total; otherwise the next young gen GC will simply bail out to a | |
2276 // full GC. | |
2277 const size_t alignment = old_gen->virtual_space()->alignment(); | |
2278 const size_t eden_used = eden_space->used_in_bytes(); | |
2279 const size_t promoted = (size_t)size_policy->avg_promoted()->padded_average(); | |
2280 const size_t absorb_size = align_size_up(eden_used + promoted, alignment); | |
2281 const size_t eden_capacity = eden_space->capacity_in_bytes(); | |
2282 | |
2283 if (absorb_size >= eden_capacity) { | |
2284 return false; // Must leave some space in eden. | |
2285 } | |
2286 | |
2287 const size_t new_young_size = young_gen->capacity_in_bytes() - absorb_size; | |
2288 if (new_young_size < young_gen->min_gen_size()) { | |
2289 return false; // Respect young gen minimum size. | |
2290 } | |
2291 | |
2292 if (TraceAdaptiveGCBoundary && Verbose) { | |
2293 gclog_or_tty->print(" absorbing " SIZE_FORMAT "K: " | |
2294 "eden " SIZE_FORMAT "K->" SIZE_FORMAT "K " | |
2295 "from " SIZE_FORMAT "K, to " SIZE_FORMAT "K " | |
2296 "young_gen " SIZE_FORMAT "K->" SIZE_FORMAT "K ", | |
2297 absorb_size / K, | |
2298 eden_capacity / K, (eden_capacity - absorb_size) / K, | |
2299 young_gen->from_space()->used_in_bytes() / K, | |
2300 young_gen->to_space()->used_in_bytes() / K, | |
2301 young_gen->capacity_in_bytes() / K, new_young_size / K); | |
2302 } | |
2303 | |
2304 // Fill the unused part of the old gen. | |
2305 MutableSpace* const old_space = old_gen->object_space(); | |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2306 HeapWord* const unused_start = old_space->top(); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2307 size_t const unused_words = pointer_delta(old_space->end(), unused_start); |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2308 |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2309 if (unused_words > 0) { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2310 if (unused_words < CollectedHeap::min_fill_size()) { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2311 return false; // If the old gen cannot be filled, must give up. |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2312 } |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2313 CollectedHeap::fill_with_objects(unused_start, unused_words); |
0 | 2314 } |
2315 | |
2316 // Take the live data from eden and set both top and end in the old gen to | |
2317 // eden top. (Need to set end because reset_after_change() mangles the region | |
2318 // from end to virtual_space->high() in debug builds). | |
2319 HeapWord* const new_top = eden_space->top(); | |
2320 old_gen->virtual_space()->expand_into(young_gen->virtual_space(), | |
2321 absorb_size); | |
2322 young_gen->reset_after_change(); | |
2323 old_space->set_top(new_top); | |
2324 old_space->set_end(new_top); | |
2325 old_gen->reset_after_change(); | |
2326 | |
2327 // Update the object start array for the filler object and the data from eden. | |
2328 ObjectStartArray* const start_array = old_gen->start_array(); | |
481
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2329 for (HeapWord* p = unused_start; p < new_top; p += oop(p)->size()) { |
7d7a7c599c17
6578152: fill_region_with_object has usability and safety issues
jcoomes
parents:
457
diff
changeset
|
2330 start_array->allocate_block(p); |
0 | 2331 } |
2332 | |
2333 // Could update the promoted average here, but it is not typically updated at | |
2334 // full GCs and the value to use is unclear. Something like | |
2335 // | |
2336 // cur_promoted_avg + absorb_size / number_of_scavenges_since_last_full_gc. | |
2337 | |
2338 size_policy->set_bytes_absorbed_from_eden(absorb_size); | |
2339 return true; | |
2340 } | |
2341 | |
2342 GCTaskManager* const PSParallelCompact::gc_task_manager() { | |
2343 assert(ParallelScavengeHeap::gc_task_manager() != NULL, | |
2344 "shouldn't return NULL"); | |
2345 return ParallelScavengeHeap::gc_task_manager(); | |
2346 } | |
2347 | |
2348 void PSParallelCompact::marking_phase(ParCompactionManager* cm, | |
2349 bool maximum_heap_compaction) { | |
2350 // Recursively traverse all live objects and mark them | |
2351 EventMark m("1 mark object"); | |
2352 TraceTime tm("marking phase", print_phases(), true, gclog_or_tty); | |
2353 | |
2354 ParallelScavengeHeap* heap = gc_heap(); | |
2355 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2356 TaskQueueSetSuper* qset = ParCompactionManager::region_array(); |
0 | 2357 ParallelTaskTerminator terminator(parallel_gc_threads, qset); |
2358 | |
2359 PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); | |
2360 PSParallelCompact::FollowStackClosure follow_stack_closure(cm); | |
2361 | |
2362 { | |
2363 TraceTime tm_m("par mark", print_phases(), true, gclog_or_tty); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
696
diff
changeset
|
2364 ParallelScavengeHeap::ParStrongRootsScope psrs; |
0 | 2365 |
2366 GCTaskQueue* q = GCTaskQueue::create(); | |
2367 | |
2368 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::universe)); | |
2369 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jni_handles)); | |
2370 // We scan the thread roots in parallel | |
2371 Threads::create_thread_roots_marking_tasks(q); | |
2372 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::object_synchronizer)); | |
2373 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::flat_profiler)); | |
2374 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management)); | |
2375 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary)); | |
2376 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti)); | |
2377 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::vm_symbols)); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
696
diff
changeset
|
2378 q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache)); |
0 | 2379 |
2380 if (parallel_gc_threads > 1) { | |
2381 for (uint j = 0; j < parallel_gc_threads; j++) { | |
2382 q->enqueue(new StealMarkingTask(&terminator)); | |
2383 } | |
2384 } | |
2385 | |
2386 WaitForBarrierGCTask* fin = WaitForBarrierGCTask::create(); | |
2387 q->enqueue(fin); | |
2388 | |
2389 gc_task_manager()->add_list(q); | |
2390 | |
2391 fin->wait_for(); | |
2392 | |
2393 // We have to release the barrier tasks! | |
2394 WaitForBarrierGCTask::destroy(fin); | |
2395 } | |
2396 | |
2397 // Process reference objects found during marking | |
2398 { | |
2399 TraceTime tm_r("reference processing", print_phases(), true, gclog_or_tty); | |
2400 if (ref_processor()->processing_is_mt()) { | |
2401 RefProcTaskExecutor task_executor; | |
2402 ref_processor()->process_discovered_references( | |
453
c96030fff130
6684579: SoftReference processing can be made more efficient
ysr
parents:
376
diff
changeset
|
2403 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, |
c96030fff130
6684579: SoftReference processing can be made more efficient
ysr
parents:
376
diff
changeset
|
2404 &task_executor); |
0 | 2405 } else { |
2406 ref_processor()->process_discovered_references( | |
453
c96030fff130
6684579: SoftReference processing can be made more efficient
ysr
parents:
376
diff
changeset
|
2407 is_alive_closure(), &mark_and_push_closure, &follow_stack_closure, NULL); |
0 | 2408 } |
2409 } | |
2410 | |
2411 TraceTime tm_c("class unloading", print_phases(), true, gclog_or_tty); | |
2412 // Follow system dictionary roots and unload classes. | |
2413 bool purged_class = SystemDictionary::do_unloading(is_alive_closure()); | |
2414 | |
2415 // Follow code cache roots. | |
2416 CodeCache::do_unloading(is_alive_closure(), &mark_and_push_closure, | |
2417 purged_class); | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
997
diff
changeset
|
2418 cm->follow_marking_stacks(); // Flush marking stack. |
0 | 2419 |
2420 // Update subklass/sibling/implementor links of live klasses | |
2421 // revisit_klass_stack is used in follow_weak_klass_links(). | |
941 | 2422 follow_weak_klass_links(); |
2423 | |
2424 // Revisit memoized MDO's and clear any unmarked weak refs | |
2425 follow_mdo_weak_refs(); | |
0 | 2426 |
2427 // Visit symbol and interned string tables and delete unmarked oops | |
2428 SymbolTable::unlink(is_alive_closure()); | |
2429 StringTable::unlink(is_alive_closure()); | |
2430 | |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
997
diff
changeset
|
2431 assert(cm->marking_stacks_empty(), "marking stacks should be empty"); |
0 | 2432 } |
2433 | |
2434 // This should be moved to the shared markSweep code! | |
2435 class PSAlwaysTrueClosure: public BoolObjectClosure { | |
2436 public: | |
2437 void do_object(oop p) { ShouldNotReachHere(); } | |
2438 bool do_object_b(oop p) { return true; } | |
2439 }; | |
2440 static PSAlwaysTrueClosure always_true; | |
2441 | |
2442 void PSParallelCompact::adjust_roots() { | |
2443 // Adjust the pointers to reflect the new locations | |
2444 EventMark m("3 adjust roots"); | |
2445 TraceTime tm("adjust roots", print_phases(), true, gclog_or_tty); | |
2446 | |
2447 // General strong roots. | |
2448 Universe::oops_do(adjust_root_pointer_closure()); | |
2449 ReferenceProcessor::oops_do(adjust_root_pointer_closure()); | |
2450 JNIHandles::oops_do(adjust_root_pointer_closure()); // Global (strong) JNI handles | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
696
diff
changeset
|
2451 Threads::oops_do(adjust_root_pointer_closure(), NULL); |
0 | 2452 ObjectSynchronizer::oops_do(adjust_root_pointer_closure()); |
2453 FlatProfiler::oops_do(adjust_root_pointer_closure()); | |
2454 Management::oops_do(adjust_root_pointer_closure()); | |
2455 JvmtiExport::oops_do(adjust_root_pointer_closure()); | |
2456 // SO_AllClasses | |
2457 SystemDictionary::oops_do(adjust_root_pointer_closure()); | |
2458 vmSymbols::oops_do(adjust_root_pointer_closure()); | |
2459 | |
2460 // Now adjust pointers in remaining weak roots. (All of which should | |
2461 // have been cleared if they pointed to non-surviving objects.) | |
2462 // Global (weak) JNI handles | |
2463 JNIHandles::weak_oops_do(&always_true, adjust_root_pointer_closure()); | |
2464 | |
2465 CodeCache::oops_do(adjust_pointer_closure()); | |
2466 SymbolTable::oops_do(adjust_root_pointer_closure()); | |
2467 StringTable::oops_do(adjust_root_pointer_closure()); | |
2468 ref_processor()->weak_oops_do(adjust_root_pointer_closure()); | |
2469 // Roots were visited so references into the young gen in roots | |
2470 // may have been scanned. Process them also. | |
2471 // Should the reference processor have a span that excludes | |
2472 // young gen objects? | |
2473 PSScavenge::reference_processor()->weak_oops_do( | |
2474 adjust_root_pointer_closure()); | |
2475 } | |
2476 | |
2477 void PSParallelCompact::compact_perm(ParCompactionManager* cm) { | |
2478 EventMark m("4 compact perm"); | |
2479 TraceTime tm("compact perm gen", print_phases(), true, gclog_or_tty); | |
2480 // trace("4"); | |
2481 | |
2482 gc_heap()->perm_gen()->start_array()->reset(); | |
2483 move_and_update(cm, perm_space_id); | |
2484 } | |
2485 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2486 void PSParallelCompact::enqueue_region_draining_tasks(GCTaskQueue* q, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2487 uint parallel_gc_threads) |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2488 { |
0 | 2489 TraceTime tm("drain task setup", print_phases(), true, gclog_or_tty); |
2490 | |
2491 const unsigned int task_count = MAX2(parallel_gc_threads, 1U); | |
2492 for (unsigned int j = 0; j < task_count; j++) { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1638
diff
changeset
|
2493 q->enqueue(new DrainStacksCompactionTask(j)); |
0 | 2494 } |
2495 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2496 // Find all regions that are available (can be filled immediately) and |
0 | 2497 // distribute them to the thread stacks. The iteration is done in reverse |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2498 // order (high to low) so the regions will be removed in ascending order. |
0 | 2499 |
2500 const ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
2501 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2502 size_t fillable_regions = 0; // A count for diagnostic purposes. |
0 | 2503 unsigned int which = 0; // The worker thread number. |
2504 | |
2505 for (unsigned int id = to_space_id; id > perm_space_id; --id) { | |
2506 SpaceInfo* const space_info = _space_info + id; | |
2507 MutableSpace* const space = space_info->space(); | |
2508 HeapWord* const new_top = space_info->new_top(); | |
2509 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2510 const size_t beg_region = sd.addr_to_region_idx(space_info->dense_prefix()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2511 const size_t end_region = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2512 sd.addr_to_region_idx(sd.region_align_up(new_top)); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2513 assert(end_region > 0, "perm gen cannot be empty"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2514 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2515 for (size_t cur = end_region - 1; cur >= beg_region; --cur) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2516 if (sd.region(cur)->claim_unsafe()) { |
0 | 2517 ParCompactionManager* cm = ParCompactionManager::manager_array(which); |
1638 | 2518 cm->push_region(cur); |
0 | 2519 |
2520 if (TraceParallelOldGCCompactionPhase && Verbose) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2521 const size_t count_mod_8 = fillable_regions & 7; |
0 | 2522 if (count_mod_8 == 0) gclog_or_tty->print("fillable: "); |
264
15dd2594d08e
6718283: existing uses of *_FORMAT_W() were broken by 6521491
jcoomes
parents:
263
diff
changeset
|
2523 gclog_or_tty->print(" " SIZE_FORMAT_W(7), cur); |
0 | 2524 if (count_mod_8 == 7) gclog_or_tty->cr(); |
2525 } | |
2526 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2527 NOT_PRODUCT(++fillable_regions;) |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2528 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2529 // Assign regions to threads in round-robin fashion. |
0 | 2530 if (++which == task_count) { |
2531 which = 0; | |
2532 } | |
2533 } | |
2534 } | |
2535 } | |
2536 | |
2537 if (TraceParallelOldGCCompactionPhase) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2538 if (Verbose && (fillable_regions & 7) != 0) gclog_or_tty->cr(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2539 gclog_or_tty->print_cr("%u initially fillable regions", fillable_regions); |
0 | 2540 } |
2541 } | |
2542 | |
2543 #define PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING 4 | |
2544 | |
2545 void PSParallelCompact::enqueue_dense_prefix_tasks(GCTaskQueue* q, | |
2546 uint parallel_gc_threads) { | |
2547 TraceTime tm("dense prefix task setup", print_phases(), true, gclog_or_tty); | |
2548 | |
2549 ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
2550 | |
2551 // Iterate over all the spaces adding tasks for updating | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2552 // regions in the dense prefix. Assume that 1 gc thread |
0 | 2553 // will work on opening the gaps and the remaining gc threads |
2554 // will work on the dense prefix. | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2555 unsigned int space_id; |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2556 for (space_id = old_space_id; space_id < last_space_id; ++ space_id) { |
0 | 2557 HeapWord* const dense_prefix_end = _space_info[space_id].dense_prefix(); |
2558 const MutableSpace* const space = _space_info[space_id].space(); | |
2559 | |
2560 if (dense_prefix_end == space->bottom()) { | |
2561 // There is no dense prefix for this space. | |
2562 continue; | |
2563 } | |
2564 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2565 // The dense prefix is before this region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2566 size_t region_index_end_dense_prefix = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2567 sd.addr_to_region_idx(dense_prefix_end); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2568 RegionData* const dense_prefix_cp = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2569 sd.region(region_index_end_dense_prefix); |
0 | 2570 assert(dense_prefix_end == space->end() || |
2571 dense_prefix_cp->available() || | |
2572 dense_prefix_cp->claimed(), | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2573 "The region after the dense prefix should always be ready to fill"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2574 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2575 size_t region_index_start = sd.addr_to_region_idx(space->bottom()); |
0 | 2576 |
2577 // Is there dense prefix work? | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2578 size_t total_dense_prefix_regions = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2579 region_index_end_dense_prefix - region_index_start; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2580 // How many regions of the dense prefix should be given to |
0 | 2581 // each thread? |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2582 if (total_dense_prefix_regions > 0) { |
0 | 2583 uint tasks_for_dense_prefix = 1; |
2584 if (UseParallelDensePrefixUpdate) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2585 if (total_dense_prefix_regions <= |
0 | 2586 (parallel_gc_threads * PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING)) { |
2587 // Don't over partition. This assumes that | |
2588 // PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING is a small integer value | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2589 // so there are not many regions to process. |
0 | 2590 tasks_for_dense_prefix = parallel_gc_threads; |
2591 } else { | |
2592 // Over partition | |
2593 tasks_for_dense_prefix = parallel_gc_threads * | |
2594 PAR_OLD_DENSE_PREFIX_OVER_PARTITIONING; | |
2595 } | |
2596 } | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2597 size_t regions_per_thread = total_dense_prefix_regions / |
0 | 2598 tasks_for_dense_prefix; |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2599 // Give each thread at least 1 region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2600 if (regions_per_thread == 0) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2601 regions_per_thread = 1; |
0 | 2602 } |
2603 | |
2604 for (uint k = 0; k < tasks_for_dense_prefix; k++) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2605 if (region_index_start >= region_index_end_dense_prefix) { |
0 | 2606 break; |
2607 } | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2608 // region_index_end is not processed |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2609 size_t region_index_end = MIN2(region_index_start + regions_per_thread, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2610 region_index_end_dense_prefix); |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2611 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2612 region_index_start, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2613 region_index_end)); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2614 region_index_start = region_index_end; |
0 | 2615 } |
2616 } | |
2617 // This gets any part of the dense prefix that did not | |
2618 // fit evenly. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2619 if (region_index_start < region_index_end_dense_prefix) { |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2620 q->enqueue(new UpdateDensePrefixTask(SpaceId(space_id), |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2621 region_index_start, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2622 region_index_end_dense_prefix)); |
0 | 2623 } |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
2624 } |
0 | 2625 } |
2626 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2627 void PSParallelCompact::enqueue_region_stealing_tasks( |
0 | 2628 GCTaskQueue* q, |
2629 ParallelTaskTerminator* terminator_ptr, | |
2630 uint parallel_gc_threads) { | |
2631 TraceTime tm("steal task setup", print_phases(), true, gclog_or_tty); | |
2632 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2633 // Once a thread has drained it's stack, it should try to steal regions from |
0 | 2634 // other threads. |
2635 if (parallel_gc_threads > 1) { | |
2636 for (uint j = 0; j < parallel_gc_threads; j++) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2637 q->enqueue(new StealRegionCompactionTask(terminator_ptr)); |
0 | 2638 } |
2639 } | |
2640 } | |
2641 | |
2642 void PSParallelCompact::compact() { | |
2643 EventMark m("5 compact"); | |
2644 // trace("5"); | |
2645 TraceTime tm("compaction phase", print_phases(), true, gclog_or_tty); | |
2646 | |
2647 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
2648 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
2649 PSOldGen* old_gen = heap->old_gen(); | |
2650 old_gen->start_array()->reset(); | |
2651 uint parallel_gc_threads = heap->gc_task_manager()->workers(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2652 TaskQueueSetSuper* qset = ParCompactionManager::region_array(); |
0 | 2653 ParallelTaskTerminator terminator(parallel_gc_threads, qset); |
2654 | |
2655 GCTaskQueue* q = GCTaskQueue::create(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2656 enqueue_region_draining_tasks(q, parallel_gc_threads); |
0 | 2657 enqueue_dense_prefix_tasks(q, parallel_gc_threads); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2658 enqueue_region_stealing_tasks(q, &terminator, parallel_gc_threads); |
0 | 2659 |
2660 { | |
2661 TraceTime tm_pc("par compact", print_phases(), true, gclog_or_tty); | |
2662 | |
2663 WaitForBarrierGCTask* fin = WaitForBarrierGCTask::create(); | |
2664 q->enqueue(fin); | |
2665 | |
2666 gc_task_manager()->add_list(q); | |
2667 | |
2668 fin->wait_for(); | |
2669 | |
2670 // We have to release the barrier tasks! | |
2671 WaitForBarrierGCTask::destroy(fin); | |
2672 | |
2673 #ifdef ASSERT | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2674 // Verify that all regions have been processed before the deferred updates. |
0 | 2675 // Note that perm_space_id is skipped; this type of verification is not |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2676 // valid until the perm gen is compacted by regions. |
0 | 2677 for (unsigned int id = old_space_id; id < last_space_id; ++id) { |
2678 verify_complete(SpaceId(id)); | |
2679 } | |
2680 #endif | |
2681 } | |
2682 | |
2683 { | |
2684 // Update the deferred objects, if any. Any compaction manager can be used. | |
2685 TraceTime tm_du("deferred updates", print_phases(), true, gclog_or_tty); | |
2686 ParCompactionManager* cm = ParCompactionManager::manager_array(0); | |
2687 for (unsigned int id = old_space_id; id < last_space_id; ++id) { | |
2688 update_deferred_objects(cm, SpaceId(id)); | |
2689 } | |
2690 } | |
2691 } | |
2692 | |
2693 #ifdef ASSERT | |
2694 void PSParallelCompact::verify_complete(SpaceId space_id) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2695 // All Regions between space bottom() to new_top() should be marked as filled |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2696 // and all Regions between new_top() and top() should be available (i.e., |
0 | 2697 // should have been emptied). |
2698 ParallelCompactData& sd = summary_data(); | |
2699 SpaceInfo si = _space_info[space_id]; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2700 HeapWord* new_top_addr = sd.region_align_up(si.new_top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2701 HeapWord* old_top_addr = sd.region_align_up(si.space()->top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2702 const size_t beg_region = sd.addr_to_region_idx(si.space()->bottom()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2703 const size_t new_top_region = sd.addr_to_region_idx(new_top_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2704 const size_t old_top_region = sd.addr_to_region_idx(old_top_addr); |
0 | 2705 |
2706 bool issued_a_warning = false; | |
2707 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2708 size_t cur_region; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2709 for (cur_region = beg_region; cur_region < new_top_region; ++cur_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2710 const RegionData* const c = sd.region(cur_region); |
0 | 2711 if (!c->completed()) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2712 warning("region " SIZE_FORMAT " not filled: " |
0 | 2713 "destination_count=" SIZE_FORMAT, |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2714 cur_region, c->destination_count()); |
0 | 2715 issued_a_warning = true; |
2716 } | |
2717 } | |
2718 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2719 for (cur_region = new_top_region; cur_region < old_top_region; ++cur_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2720 const RegionData* const c = sd.region(cur_region); |
0 | 2721 if (!c->available()) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2722 warning("region " SIZE_FORMAT " not empty: " |
0 | 2723 "destination_count=" SIZE_FORMAT, |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2724 cur_region, c->destination_count()); |
0 | 2725 issued_a_warning = true; |
2726 } | |
2727 } | |
2728 | |
2729 if (issued_a_warning) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2730 print_region_ranges(); |
0 | 2731 } |
2732 } | |
2733 #endif // #ifdef ASSERT | |
2734 | |
2735 void PSParallelCompact::compact_serial(ParCompactionManager* cm) { | |
2736 EventMark m("5 compact serial"); | |
2737 TraceTime tm("compact serial", print_phases(), true, gclog_or_tty); | |
2738 | |
2739 ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); | |
2740 assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); | |
2741 | |
2742 PSYoungGen* young_gen = heap->young_gen(); | |
2743 PSOldGen* old_gen = heap->old_gen(); | |
2744 | |
2745 old_gen->start_array()->reset(); | |
2746 old_gen->move_and_update(cm); | |
2747 young_gen->move_and_update(cm); | |
2748 } | |
2749 | |
2750 void | |
941 | 2751 PSParallelCompact::follow_weak_klass_links() { |
0 | 2752 // All klasses on the revisit stack are marked at this point. |
2753 // Update and follow all subklass, sibling and implementor links. | |
941 | 2754 if (PrintRevisitStats) { |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2755 gclog_or_tty->print_cr("#classes in system dictionary = %d", |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2756 SystemDictionary::number_of_classes()); |
941 | 2757 } |
2758 for (uint i = 0; i < ParallelGCThreads + 1; i++) { | |
0 | 2759 ParCompactionManager* cm = ParCompactionManager::manager_array(i); |
2760 KeepAliveClosure keep_alive_closure(cm); | |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2761 Stack<Klass*>* const rks = cm->revisit_klass_stack(); |
941 | 2762 if (PrintRevisitStats) { |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2763 gclog_or_tty->print_cr("Revisit klass stack[%u] length = " SIZE_FORMAT, |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2764 i, rks->size()); |
941 | 2765 } |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2766 while (!rks->is_empty()) { |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2767 Klass* const k = rks->pop(); |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2768 k->follow_weak_klass_links(is_alive_closure(), &keep_alive_closure); |
0 | 2769 } |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2770 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
997
diff
changeset
|
2771 cm->follow_marking_stacks(); |
0 | 2772 } |
2773 } | |
2774 | |
2775 void | |
2776 PSParallelCompact::revisit_weak_klass_link(ParCompactionManager* cm, Klass* k) { | |
2777 cm->revisit_klass_stack()->push(k); | |
2778 } | |
2779 | |
941 | 2780 void PSParallelCompact::revisit_mdo(ParCompactionManager* cm, DataLayout* p) { |
2781 cm->revisit_mdo_stack()->push(p); | |
2782 } | |
2783 | |
2784 void PSParallelCompact::follow_mdo_weak_refs() { | |
2785 // All strongly reachable oops have been marked at this point; | |
2786 // we can visit and clear any weak references from MDO's which | |
2787 // we memoized during the strong marking phase. | |
2788 if (PrintRevisitStats) { | |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2789 gclog_or_tty->print_cr("#classes in system dictionary = %d", |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2790 SystemDictionary::number_of_classes()); |
941 | 2791 } |
2792 for (uint i = 0; i < ParallelGCThreads + 1; i++) { | |
2793 ParCompactionManager* cm = ParCompactionManager::manager_array(i); | |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2794 Stack<DataLayout*>* rms = cm->revisit_mdo_stack(); |
941 | 2795 if (PrintRevisitStats) { |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2796 gclog_or_tty->print_cr("Revisit MDO stack[%u] size = " SIZE_FORMAT, |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2797 i, rms->size()); |
941 | 2798 } |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2799 while (!rms->is_empty()) { |
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2800 rms->pop()->follow_weak_refs(is_alive_closure()); |
941 | 2801 } |
1836
894b1d7c7e01
6423256: GC stacks should use a better data structure
jcoomes
parents:
1833
diff
changeset
|
2802 |
1311
2a1472c30599
4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents:
997
diff
changeset
|
2803 cm->follow_marking_stacks(); |
941 | 2804 } |
2805 } | |
2806 | |
2807 | |
0 | 2808 #ifdef VALIDATE_MARK_SWEEP |
2809 | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
2810 void PSParallelCompact::track_adjusted_pointer(void* p, bool isroot) { |
0 | 2811 if (!ValidateMarkSweep) |
2812 return; | |
2813 | |
2814 if (!isroot) { | |
2815 if (_pointer_tracking) { | |
2816 guarantee(_adjusted_pointers->contains(p), "should have seen this pointer"); | |
2817 _adjusted_pointers->remove(p); | |
2818 } | |
2819 } else { | |
2820 ptrdiff_t index = _root_refs_stack->find(p); | |
2821 if (index != -1) { | |
2822 int l = _root_refs_stack->length(); | |
2823 if (l > 0 && l - 1 != index) { | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
2824 void* last = _root_refs_stack->pop(); |
0 | 2825 assert(last != p, "should be different"); |
2826 _root_refs_stack->at_put(index, last); | |
2827 } else { | |
2828 _root_refs_stack->remove(p); | |
2829 } | |
2830 } | |
2831 } | |
2832 } | |
2833 | |
2834 | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
2835 void PSParallelCompact::check_adjust_pointer(void* p) { |
0 | 2836 _adjusted_pointers->push(p); |
2837 } | |
2838 | |
2839 | |
2840 class AdjusterTracker: public OopClosure { | |
2841 public: | |
2842 AdjusterTracker() {}; | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
2843 void do_oop(oop* o) { PSParallelCompact::check_adjust_pointer(o); } |
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
79
diff
changeset
|
2844 void do_oop(narrowOop* o) { PSParallelCompact::check_adjust_pointer(o); } |
0 | 2845 }; |
2846 | |
2847 | |
2848 void PSParallelCompact::track_interior_pointers(oop obj) { | |
2849 if (ValidateMarkSweep) { | |
2850 _adjusted_pointers->clear(); | |
2851 _pointer_tracking = true; | |
2852 | |
2853 AdjusterTracker checker; | |
2854 obj->oop_iterate(&checker); | |
2855 } | |
2856 } | |
2857 | |
2858 | |
2859 void PSParallelCompact::check_interior_pointers() { | |
2860 if (ValidateMarkSweep) { | |
2861 _pointer_tracking = false; | |
2862 guarantee(_adjusted_pointers->length() == 0, "should have processed the same pointers"); | |
2863 } | |
2864 } | |
2865 | |
2866 | |
2867 void PSParallelCompact::reset_live_oop_tracking(bool at_perm) { | |
2868 if (ValidateMarkSweep) { | |
2869 guarantee((size_t)_live_oops->length() == _live_oops_index, "should be at end of live oops"); | |
2870 _live_oops_index = at_perm ? _live_oops_index_at_perm : 0; | |
2871 } | |
2872 } | |
2873 | |
2874 | |
2875 void PSParallelCompact::register_live_oop(oop p, size_t size) { | |
2876 if (ValidateMarkSweep) { | |
2877 _live_oops->push(p); | |
2878 _live_oops_size->push(size); | |
2879 _live_oops_index++; | |
2880 } | |
2881 } | |
2882 | |
2883 void PSParallelCompact::validate_live_oop(oop p, size_t size) { | |
2884 if (ValidateMarkSweep) { | |
2885 oop obj = _live_oops->at((int)_live_oops_index); | |
2886 guarantee(obj == p, "should be the same object"); | |
2887 guarantee(_live_oops_size->at((int)_live_oops_index) == size, "should be the same size"); | |
2888 _live_oops_index++; | |
2889 } | |
2890 } | |
2891 | |
2892 void PSParallelCompact::live_oop_moved_to(HeapWord* q, size_t size, | |
2893 HeapWord* compaction_top) { | |
2894 assert(oop(q)->forwardee() == NULL || oop(q)->forwardee() == oop(compaction_top), | |
2895 "should be moved to forwarded location"); | |
2896 if (ValidateMarkSweep) { | |
2897 PSParallelCompact::validate_live_oop(oop(q), size); | |
2898 _live_oops_moved_to->push(oop(compaction_top)); | |
2899 } | |
2900 if (RecordMarkSweepCompaction) { | |
2901 _cur_gc_live_oops->push(q); | |
2902 _cur_gc_live_oops_moved_to->push(compaction_top); | |
2903 _cur_gc_live_oops_size->push(size); | |
2904 } | |
2905 } | |
2906 | |
2907 | |
2908 void PSParallelCompact::compaction_complete() { | |
2909 if (RecordMarkSweepCompaction) { | |
2910 GrowableArray<HeapWord*>* _tmp_live_oops = _cur_gc_live_oops; | |
2911 GrowableArray<HeapWord*>* _tmp_live_oops_moved_to = _cur_gc_live_oops_moved_to; | |
2912 GrowableArray<size_t> * _tmp_live_oops_size = _cur_gc_live_oops_size; | |
2913 | |
2914 _cur_gc_live_oops = _last_gc_live_oops; | |
2915 _cur_gc_live_oops_moved_to = _last_gc_live_oops_moved_to; | |
2916 _cur_gc_live_oops_size = _last_gc_live_oops_size; | |
2917 _last_gc_live_oops = _tmp_live_oops; | |
2918 _last_gc_live_oops_moved_to = _tmp_live_oops_moved_to; | |
2919 _last_gc_live_oops_size = _tmp_live_oops_size; | |
2920 } | |
2921 } | |
2922 | |
2923 | |
2924 void PSParallelCompact::print_new_location_of_heap_address(HeapWord* q) { | |
2925 if (!RecordMarkSweepCompaction) { | |
2926 tty->print_cr("Requires RecordMarkSweepCompaction to be enabled"); | |
2927 return; | |
2928 } | |
2929 | |
2930 if (_last_gc_live_oops == NULL) { | |
2931 tty->print_cr("No compaction information gathered yet"); | |
2932 return; | |
2933 } | |
2934 | |
2935 for (int i = 0; i < _last_gc_live_oops->length(); i++) { | |
2936 HeapWord* old_oop = _last_gc_live_oops->at(i); | |
2937 size_t sz = _last_gc_live_oops_size->at(i); | |
2938 if (old_oop <= q && q < (old_oop + sz)) { | |
2939 HeapWord* new_oop = _last_gc_live_oops_moved_to->at(i); | |
2940 size_t offset = (q - old_oop); | |
2941 tty->print_cr("Address " PTR_FORMAT, q); | |
2942 tty->print_cr(" Was in oop " PTR_FORMAT ", size %d, at offset %d", old_oop, sz, offset); | |
2943 tty->print_cr(" Now in oop " PTR_FORMAT ", actual address " PTR_FORMAT, new_oop, new_oop + offset); | |
2944 return; | |
2945 } | |
2946 } | |
2947 | |
2948 tty->print_cr("Address " PTR_FORMAT " not found in live oop information from last GC", q); | |
2949 } | |
2950 #endif //VALIDATE_MARK_SWEEP | |
2951 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2952 // Update interior oops in the ranges of regions [beg_region, end_region). |
0 | 2953 void |
2954 PSParallelCompact::update_and_deadwood_in_dense_prefix(ParCompactionManager* cm, | |
2955 SpaceId space_id, | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2956 size_t beg_region, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2957 size_t end_region) { |
0 | 2958 ParallelCompactData& sd = summary_data(); |
2959 ParMarkBitMap* const mbm = mark_bitmap(); | |
2960 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2961 HeapWord* beg_addr = sd.region_to_addr(beg_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2962 HeapWord* const end_addr = sd.region_to_addr(end_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2963 assert(beg_region <= end_region, "bad region range"); |
0 | 2964 assert(end_addr <= dense_prefix(space_id), "not in the dense prefix"); |
2965 | |
2966 #ifdef ASSERT | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2967 // Claim the regions to avoid triggering an assert when they are marked as |
0 | 2968 // filled. |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2969 for (size_t claim_region = beg_region; claim_region < end_region; ++claim_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2970 assert(sd.region(claim_region)->claim_unsafe(), "claim() failed"); |
0 | 2971 } |
2972 #endif // #ifdef ASSERT | |
2973 | |
2974 if (beg_addr != space(space_id)->bottom()) { | |
2975 // Find the first live object or block of dead space that *starts* in this | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2976 // range of regions. If a partial object crosses onto the region, skip it; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2977 // it will be marked for 'deferred update' when the object head is |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2978 // processed. If dead space crosses onto the region, it is also skipped; it |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2979 // will be filled when the prior region is processed. If neither of those |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2980 // apply, the first word in the region is the start of a live object or dead |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2981 // space. |
0 | 2982 assert(beg_addr > space(space_id)->bottom(), "sanity"); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2983 const RegionData* const cp = sd.region(beg_region); |
0 | 2984 if (cp->partial_obj_size() != 0) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2985 beg_addr = sd.partial_obj_end(beg_region); |
0 | 2986 } else if (dead_space_crosses_boundary(cp, mbm->addr_to_bit(beg_addr))) { |
2987 beg_addr = mbm->find_obj_beg(beg_addr, end_addr); | |
2988 } | |
2989 } | |
2990 | |
2991 if (beg_addr < end_addr) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
2992 // A live object or block of dead space starts in this range of Regions. |
0 | 2993 HeapWord* const dense_prefix_end = dense_prefix(space_id); |
2994 | |
2995 // Create closures and iterate. | |
2996 UpdateOnlyClosure update_closure(mbm, cm, space_id); | |
2997 FillClosure fill_closure(cm, space_id); | |
2998 ParMarkBitMap::IterationStatus status; | |
2999 status = mbm->iterate(&update_closure, &fill_closure, beg_addr, end_addr, | |
3000 dense_prefix_end); | |
3001 if (status == ParMarkBitMap::incomplete) { | |
3002 update_closure.do_addr(update_closure.source()); | |
3003 } | |
3004 } | |
3005 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3006 // Mark the regions as filled. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3007 RegionData* const beg_cp = sd.region(beg_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3008 RegionData* const end_cp = sd.region(end_region); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3009 for (RegionData* cp = beg_cp; cp < end_cp; ++cp) { |
0 | 3010 cp->set_completed(); |
3011 } | |
3012 } | |
3013 | |
3014 // Return the SpaceId for the space containing addr. If addr is not in the | |
3015 // heap, last_space_id is returned. In debug mode it expects the address to be | |
3016 // in the heap and asserts such. | |
3017 PSParallelCompact::SpaceId PSParallelCompact::space_id(HeapWord* addr) { | |
3018 assert(Universe::heap()->is_in_reserved(addr), "addr not in the heap"); | |
3019 | |
3020 for (unsigned int id = perm_space_id; id < last_space_id; ++id) { | |
3021 if (_space_info[id].space()->contains(addr)) { | |
3022 return SpaceId(id); | |
3023 } | |
3024 } | |
3025 | |
3026 assert(false, "no space contains the addr"); | |
3027 return last_space_id; | |
3028 } | |
3029 | |
3030 void PSParallelCompact::update_deferred_objects(ParCompactionManager* cm, | |
3031 SpaceId id) { | |
3032 assert(id < last_space_id, "bad space id"); | |
3033 | |
3034 ParallelCompactData& sd = summary_data(); | |
3035 const SpaceInfo* const space_info = _space_info + id; | |
3036 ObjectStartArray* const start_array = space_info->start_array(); | |
3037 | |
3038 const MutableSpace* const space = space_info->space(); | |
3039 assert(space_info->dense_prefix() >= space->bottom(), "dense_prefix not set"); | |
3040 HeapWord* const beg_addr = space_info->dense_prefix(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3041 HeapWord* const end_addr = sd.region_align_up(space_info->new_top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3042 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3043 const RegionData* const beg_region = sd.addr_to_region_ptr(beg_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3044 const RegionData* const end_region = sd.addr_to_region_ptr(end_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3045 const RegionData* cur_region; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3046 for (cur_region = beg_region; cur_region < end_region; ++cur_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3047 HeapWord* const addr = cur_region->deferred_obj_addr(); |
0 | 3048 if (addr != NULL) { |
3049 if (start_array != NULL) { | |
3050 start_array->allocate_block(addr); | |
3051 } | |
3052 oop(addr)->update_contents(cm); | |
3053 assert(oop(addr)->is_oop_or_null(), "should be an oop now"); | |
3054 } | |
3055 } | |
3056 } | |
3057 | |
3058 // Skip over count live words starting from beg, and return the address of the | |
3059 // next live word. Unless marked, the word corresponding to beg is assumed to | |
3060 // be dead. Callers must either ensure beg does not correspond to the middle of | |
3061 // an object, or account for those live words in some other way. Callers must | |
3062 // also ensure that there are enough live words in the range [beg, end) to skip. | |
3063 HeapWord* | |
3064 PSParallelCompact::skip_live_words(HeapWord* beg, HeapWord* end, size_t count) | |
3065 { | |
3066 assert(count > 0, "sanity"); | |
3067 | |
3068 ParMarkBitMap* m = mark_bitmap(); | |
3069 idx_t bits_to_skip = m->words_to_bits(count); | |
3070 idx_t cur_beg = m->addr_to_bit(beg); | |
3071 const idx_t search_end = BitMap::word_align_up(m->addr_to_bit(end)); | |
3072 | |
3073 do { | |
3074 cur_beg = m->find_obj_beg(cur_beg, search_end); | |
3075 idx_t cur_end = m->find_obj_end(cur_beg, search_end); | |
3076 const size_t obj_bits = cur_end - cur_beg + 1; | |
3077 if (obj_bits > bits_to_skip) { | |
3078 return m->bit_to_addr(cur_beg + bits_to_skip); | |
3079 } | |
3080 bits_to_skip -= obj_bits; | |
3081 cur_beg = cur_end + 1; | |
3082 } while (bits_to_skip > 0); | |
3083 | |
3084 // Skipping the desired number of words landed just past the end of an object. | |
3085 // Find the start of the next object. | |
3086 cur_beg = m->find_obj_beg(cur_beg, search_end); | |
3087 assert(cur_beg < m->addr_to_bit(end), "not enough live words to skip"); | |
3088 return m->bit_to_addr(cur_beg); | |
3089 } | |
3090 | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3091 HeapWord* PSParallelCompact::first_src_addr(HeapWord* const dest_addr, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3092 SpaceId src_space_id, |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3093 size_t src_region_idx) |
0 | 3094 { |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3095 assert(summary_data().is_region_aligned(dest_addr), "not aligned"); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3096 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3097 const SplitInfo& split_info = _space_info[src_space_id].split_info(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3098 if (split_info.dest_region_addr() == dest_addr) { |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3099 // The partial object ending at the split point contains the first word to |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3100 // be copied to dest_addr. |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3101 return split_info.first_src_addr(); |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3102 } |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3103 |
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3104 const ParallelCompactData& sd = summary_data(); |
0 | 3105 ParMarkBitMap* const bitmap = mark_bitmap(); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3106 const size_t RegionSize = ParallelCompactData::RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3107 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3108 assert(sd.is_region_aligned(dest_addr), "not aligned"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3109 const RegionData* const src_region_ptr = sd.region(src_region_idx); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3110 const size_t partial_obj_size = src_region_ptr->partial_obj_size(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3111 HeapWord* const src_region_destination = src_region_ptr->destination(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3112 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3113 assert(dest_addr >= src_region_destination, "wrong src region"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3114 assert(src_region_ptr->data_size() > 0, "src region cannot be empty"); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3115 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3116 HeapWord* const src_region_beg = sd.region_to_addr(src_region_idx); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3117 HeapWord* const src_region_end = src_region_beg + RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3118 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3119 HeapWord* addr = src_region_beg; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3120 if (dest_addr == src_region_destination) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3121 // Return the first live word in the source region. |
0 | 3122 if (partial_obj_size == 0) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3123 addr = bitmap->find_obj_beg(addr, src_region_end); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3124 assert(addr < src_region_end, "no objects start in src region"); |
0 | 3125 } |
3126 return addr; | |
3127 } | |
3128 | |
3129 // Must skip some live data. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3130 size_t words_to_skip = dest_addr - src_region_destination; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3131 assert(src_region_ptr->data_size() > words_to_skip, "wrong src region"); |
0 | 3132 |
3133 if (partial_obj_size >= words_to_skip) { | |
3134 // All the live words to skip are part of the partial object. | |
3135 addr += words_to_skip; | |
3136 if (partial_obj_size == words_to_skip) { | |
3137 // Find the first live word past the partial object. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3138 addr = bitmap->find_obj_beg(addr, src_region_end); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3139 assert(addr < src_region_end, "wrong src region"); |
0 | 3140 } |
3141 return addr; | |
3142 } | |
3143 | |
3144 // Skip over the partial object (if any). | |
3145 if (partial_obj_size != 0) { | |
3146 words_to_skip -= partial_obj_size; | |
3147 addr += partial_obj_size; | |
3148 } | |
3149 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3150 // Skip over live words due to objects that start in the region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3151 addr = skip_live_words(addr, src_region_end, words_to_skip); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3152 assert(addr < src_region_end, "wrong src region"); |
0 | 3153 return addr; |
3154 } | |
3155 | |
3156 void PSParallelCompact::decrement_destination_counts(ParCompactionManager* cm, | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3157 SpaceId src_space_id, |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3158 size_t beg_region, |
0 | 3159 HeapWord* end_addr) |
3160 { | |
3161 ParallelCompactData& sd = summary_data(); | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3162 |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3163 #ifdef ASSERT |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3164 MutableSpace* const src_space = _space_info[src_space_id].space(); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3165 HeapWord* const beg_addr = sd.region_to_addr(beg_region); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3166 assert(src_space->contains(beg_addr) || beg_addr == src_space->end(), |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3167 "src_space_id does not match beg_addr"); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3168 assert(src_space->contains(end_addr) || end_addr == src_space->end(), |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3169 "src_space_id does not match end_addr"); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3170 #endif // #ifdef ASSERT |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3171 |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3172 RegionData* const beg = sd.region(beg_region); |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3173 RegionData* const end = sd.addr_to_region_ptr(sd.region_align_up(end_addr)); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3174 |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3175 // Regions up to new_top() are enqueued if they become available. |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3176 HeapWord* const new_top = _space_info[src_space_id].new_top(); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3177 RegionData* const enqueue_end = |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3178 sd.addr_to_region_ptr(sd.region_align_up(new_top)); |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3179 |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3180 for (RegionData* cur = beg; cur < end; ++cur) { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3181 assert(cur->data_size() > 0, "region must have live data"); |
0 | 3182 cur->decrement_destination_count(); |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3183 if (cur < enqueue_end && cur->available() && cur->claim()) { |
1638 | 3184 cm->push_region(sd.region(cur)); |
0 | 3185 } |
3186 } | |
3187 } | |
3188 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3189 size_t PSParallelCompact::next_src_region(MoveAndUpdateClosure& closure, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3190 SpaceId& src_space_id, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3191 HeapWord*& src_space_top, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3192 HeapWord* end_addr) |
0 | 3193 { |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3194 typedef ParallelCompactData::RegionData RegionData; |
0 | 3195 |
3196 ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3197 const size_t region_size = ParallelCompactData::RegionSize; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3198 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3199 size_t src_region_idx = 0; |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3200 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3201 // Skip empty regions (if any) up to the top of the space. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3202 HeapWord* const src_aligned_up = sd.region_align_up(end_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3203 RegionData* src_region_ptr = sd.addr_to_region_ptr(src_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3204 HeapWord* const top_aligned_up = sd.region_align_up(src_space_top); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3205 const RegionData* const top_region_ptr = |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3206 sd.addr_to_region_ptr(top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3207 while (src_region_ptr < top_region_ptr && src_region_ptr->data_size() == 0) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3208 ++src_region_ptr; |
0 | 3209 } |
3210 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3211 if (src_region_ptr < top_region_ptr) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3212 // The next source region is in the current space. Update src_region_idx |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3213 // and the source address to match src_region_ptr. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3214 src_region_idx = sd.region(src_region_ptr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3215 HeapWord* const src_region_addr = sd.region_to_addr(src_region_idx); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3216 if (src_region_addr > closure.source()) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3217 closure.set_source(src_region_addr); |
0 | 3218 } |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3219 return src_region_idx; |
0 | 3220 } |
3221 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3222 // Switch to a new source space and find the first non-empty region. |
0 | 3223 unsigned int space_id = src_space_id + 1; |
3224 assert(space_id < last_space_id, "not enough spaces"); | |
3225 | |
3226 HeapWord* const destination = closure.destination(); | |
3227 | |
3228 do { | |
3229 MutableSpace* space = _space_info[space_id].space(); | |
3230 HeapWord* const bottom = space->bottom(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3231 const RegionData* const bottom_cp = sd.addr_to_region_ptr(bottom); |
0 | 3232 |
3233 // Iterate over the spaces that do not compact into themselves. | |
3234 if (bottom_cp->destination() != bottom) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3235 HeapWord* const top_aligned_up = sd.region_align_up(space->top()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3236 const RegionData* const top_cp = sd.addr_to_region_ptr(top_aligned_up); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3237 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3238 for (const RegionData* src_cp = bottom_cp; src_cp < top_cp; ++src_cp) { |
0 | 3239 if (src_cp->live_obj_size() > 0) { |
3240 // Found it. | |
3241 assert(src_cp->destination() == destination, | |
3242 "first live obj in the space must match the destination"); | |
3243 assert(src_cp->partial_obj_size() == 0, | |
3244 "a space cannot begin with a partial obj"); | |
3245 | |
3246 src_space_id = SpaceId(space_id); | |
3247 src_space_top = space->top(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3248 const size_t src_region_idx = sd.region(src_cp); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3249 closure.set_source(sd.region_to_addr(src_region_idx)); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3250 return src_region_idx; |
0 | 3251 } else { |
3252 assert(src_cp->data_size() == 0, "sanity"); | |
3253 } | |
3254 } | |
3255 } | |
3256 } while (++space_id < last_space_id); | |
3257 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3258 assert(false, "no source region was found"); |
0 | 3259 return 0; |
3260 } | |
3261 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3262 void PSParallelCompact::fill_region(ParCompactionManager* cm, size_t region_idx) |
0 | 3263 { |
3264 typedef ParMarkBitMap::IterationStatus IterationStatus; | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3265 const size_t RegionSize = ParallelCompactData::RegionSize; |
0 | 3266 ParMarkBitMap* const bitmap = mark_bitmap(); |
3267 ParallelCompactData& sd = summary_data(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3268 RegionData* const region_ptr = sd.region(region_idx); |
0 | 3269 |
3270 // Get the items needed to construct the closure. | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3271 HeapWord* dest_addr = sd.region_to_addr(region_idx); |
0 | 3272 SpaceId dest_space_id = space_id(dest_addr); |
3273 ObjectStartArray* start_array = _space_info[dest_space_id].start_array(); | |
3274 HeapWord* new_top = _space_info[dest_space_id].new_top(); | |
3275 assert(dest_addr < new_top, "sanity"); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3276 const size_t words = MIN2(pointer_delta(new_top, dest_addr), RegionSize); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3277 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3278 // Get the source region and related info. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3279 size_t src_region_idx = region_ptr->source_region(); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3280 SpaceId src_space_id = space_id(sd.region_to_addr(src_region_idx)); |
0 | 3281 HeapWord* src_space_top = _space_info[src_space_id].space()->top(); |
3282 | |
3283 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words); | |
482
7c2386d67889
6765745: par compact - allow young gen spaces to be split
jcoomes
parents:
481
diff
changeset
|
3284 closure.set_source(first_src_addr(dest_addr, src_space_id, src_region_idx)); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3285 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3286 // Adjust src_region_idx to prepare for decrementing destination counts (the |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3287 // destination count is not decremented when a region is copied to itself). |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3288 if (src_region_idx == region_idx) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3289 src_region_idx += 1; |
0 | 3290 } |
3291 | |
3292 if (bitmap->is_unmarked(closure.source())) { | |
3293 // The first source word is in the middle of an object; copy the remainder | |
3294 // of the object or as much as will fit. The fact that pointer updates were | |
3295 // deferred will be noted when the object header is processed. | |
3296 HeapWord* const old_src_addr = closure.source(); | |
3297 closure.copy_partial_obj(); | |
3298 if (closure.is_full()) { | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3299 decrement_destination_counts(cm, src_space_id, src_region_idx, |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3300 closure.source()); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3301 region_ptr->set_deferred_obj_addr(NULL); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3302 region_ptr->set_completed(); |
0 | 3303 return; |
3304 } | |
3305 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3306 HeapWord* const end_addr = sd.region_align_down(closure.source()); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3307 if (sd.region_align_down(old_src_addr) != end_addr) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3308 // The partial object was copied from more than one source region. |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3309 decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3310 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3311 // Move to the next source region, possibly switching spaces as well. All |
0 | 3312 // args except end_addr may be modified. |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3313 src_region_idx = next_src_region(closure, src_space_id, src_space_top, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3314 end_addr); |
0 | 3315 } |
3316 } | |
3317 | |
3318 do { | |
3319 HeapWord* const cur_addr = closure.source(); | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3320 HeapWord* const end_addr = MIN2(sd.region_align_up(cur_addr + 1), |
0 | 3321 src_space_top); |
3322 IterationStatus status = bitmap->iterate(&closure, cur_addr, end_addr); | |
3323 | |
3324 if (status == ParMarkBitMap::incomplete) { | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3325 // The last obj that starts in the source region does not end in the |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3326 // region. |
1489
cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
parents:
1387
diff
changeset
|
3327 assert(closure.source() < end_addr, "sanity"); |
0 | 3328 HeapWord* const obj_beg = closure.source(); |
3329 HeapWord* const range_end = MIN2(obj_beg + closure.words_remaining(), | |
3330 src_space_top); | |
3331 HeapWord* const obj_end = bitmap->find_obj_end(obj_beg, range_end); | |
3332 if (obj_end < range_end) { | |
3333 // The end was found; the entire object will fit. | |
3334 status = closure.do_addr(obj_beg, bitmap->obj_size(obj_beg, obj_end)); | |
3335 assert(status != ParMarkBitMap::would_overflow, "sanity"); | |
3336 } else { | |
3337 // The end was not found; the object will not fit. | |
3338 assert(range_end < src_space_top, "obj cannot cross space boundary"); | |
3339 status = ParMarkBitMap::would_overflow; | |
3340 } | |
3341 } | |
3342 | |
3343 if (status == ParMarkBitMap::would_overflow) { | |
3344 // The last object did not fit. Note that interior oop updates were | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3345 // deferred, then copy enough of the object to fill the region. |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3346 region_ptr->set_deferred_obj_addr(closure.destination()); |
0 | 3347 status = closure.copy_until_full(); // copies from closure.source() |
3348 | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3349 decrement_destination_counts(cm, src_space_id, src_region_idx, |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3350 closure.source()); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3351 region_ptr->set_completed(); |
0 | 3352 return; |
3353 } | |
3354 | |
3355 if (status == ParMarkBitMap::full) { | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3356 decrement_destination_counts(cm, src_space_id, src_region_idx, |
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3357 closure.source()); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3358 region_ptr->set_deferred_obj_addr(NULL); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3359 region_ptr->set_completed(); |
0 | 3360 return; |
3361 } | |
3362 | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3363 decrement_destination_counts(cm, src_space_id, src_region_idx, end_addr); |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3364 |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3365 // Move to the next source region, possibly switching spaces as well. All |
0 | 3366 // args except end_addr may be modified. |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3367 src_region_idx = next_src_region(closure, src_space_id, src_space_top, |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3368 end_addr); |
0 | 3369 } while (true); |
3370 } | |
3371 | |
3372 void | |
3373 PSParallelCompact::move_and_update(ParCompactionManager* cm, SpaceId space_id) { | |
3374 const MutableSpace* sp = space(space_id); | |
3375 if (sp->is_empty()) { | |
3376 return; | |
3377 } | |
3378 | |
3379 ParallelCompactData& sd = PSParallelCompact::summary_data(); | |
3380 ParMarkBitMap* const bitmap = mark_bitmap(); | |
3381 HeapWord* const dp_addr = dense_prefix(space_id); | |
3382 HeapWord* beg_addr = sp->bottom(); | |
3383 HeapWord* end_addr = sp->top(); | |
3384 | |
3385 #ifdef ASSERT | |
3386 assert(beg_addr <= dp_addr && dp_addr <= end_addr, "bad dense prefix"); | |
3387 if (cm->should_verify_only()) { | |
3388 VerifyUpdateClosure verify_update(cm, sp); | |
3389 bitmap->iterate(&verify_update, beg_addr, end_addr); | |
3390 return; | |
3391 } | |
3392 | |
3393 if (cm->should_reset_only()) { | |
3394 ResetObjectsClosure reset_objects(cm); | |
3395 bitmap->iterate(&reset_objects, beg_addr, end_addr); | |
3396 return; | |
3397 } | |
3398 #endif | |
3399 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3400 const size_t beg_region = sd.addr_to_region_idx(beg_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3401 const size_t dp_region = sd.addr_to_region_idx(dp_addr); |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3402 if (beg_region < dp_region) { |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3403 update_and_deadwood_in_dense_prefix(cm, space_id, beg_region, dp_region); |
0 | 3404 } |
3405 | |
375
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3406 // The destination of the first live object that starts in the region is one |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3407 // past the end of the partial object entering the region (if any). |
81cd571500b0
6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents:
374
diff
changeset
|
3408 HeapWord* const dest_addr = sd.partial_obj_end(dp_region); |
0 | 3409 HeapWord* const new_top = _space_info[space_id].new_top(); |
3410 assert(new_top >= dest_addr, "bad new_top value"); | |
3411 const size_t words = pointer_delta(new_top, dest_addr); | |
3412 | |
3413 if (words > 0) { | |
3414 ObjectStartArray* start_array = _space_info[space_id].start_array(); | |
3415 MoveAndUpdateClosure closure(bitmap, cm, start_array, dest_addr, words); | |
3416 | |
3417 ParMarkBitMap::IterationStatus status; | |
3418 status = bitmap->iterate(&closure, dest_addr, end_addr); | |
3419 assert(status == ParMarkBitMap::full, "iteration not complete"); | |
3420 assert(bitmap->find_obj_beg(closure.source(), end_addr) == end_addr, | |
3421 "live objects skipped because closure is full"); | |
3422 } | |
3423 } | |
3424 | |
3425 jlong PSParallelCompact::millis_since_last_gc() { | |
3426 jlong ret_val = os::javaTimeMillis() - _time_of_last_gc; | |
3427 // XXX See note in genCollectedHeap::millis_since_last_gc(). | |
3428 if (ret_val < 0) { | |
3429 NOT_PRODUCT(warning("time warp: %d", ret_val);) | |
3430 return 0; | |
3431 } | |
3432 return ret_val; | |
3433 } | |
3434 | |
3435 void PSParallelCompact::reset_millis_since_last_gc() { | |
3436 _time_of_last_gc = os::javaTimeMillis(); | |
3437 } | |
3438 | |
3439 ParMarkBitMap::IterationStatus MoveAndUpdateClosure::copy_until_full() | |
3440 { | |
3441 if (source() != destination()) { | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3442 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
0 | 3443 Copy::aligned_conjoint_words(source(), destination(), words_remaining()); |
3444 } | |
3445 update_state(words_remaining()); | |
3446 assert(is_full(), "sanity"); | |
3447 return ParMarkBitMap::full; | |
3448 } | |
3449 | |
3450 void MoveAndUpdateClosure::copy_partial_obj() | |
3451 { | |
3452 size_t words = words_remaining(); | |
3453 | |
3454 HeapWord* const range_end = MIN2(source() + words, bitmap()->region_end()); | |
3455 HeapWord* const end_addr = bitmap()->find_obj_end(source(), range_end); | |
3456 if (end_addr < range_end) { | |
3457 words = bitmap()->obj_size(source(), end_addr); | |
3458 } | |
3459 | |
3460 // This test is necessary; if omitted, the pointer updates to a partial object | |
3461 // that crosses the dense prefix boundary could be overwritten. | |
3462 if (source() != destination()) { | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3463 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
0 | 3464 Copy::aligned_conjoint_words(source(), destination(), words); |
3465 } | |
3466 update_state(words); | |
3467 } | |
3468 | |
3469 ParMarkBitMapClosure::IterationStatus | |
3470 MoveAndUpdateClosure::do_addr(HeapWord* addr, size_t words) { | |
3471 assert(destination() != NULL, "sanity"); | |
3472 assert(bitmap()->obj_size(addr) == words, "bad size"); | |
3473 | |
3474 _source = addr; | |
3475 assert(PSParallelCompact::summary_data().calc_new_pointer(source()) == | |
3476 destination(), "wrong destination"); | |
3477 | |
3478 if (words > words_remaining()) { | |
3479 return ParMarkBitMap::would_overflow; | |
3480 } | |
3481 | |
3482 // The start_array must be updated even if the object is not moving. | |
3483 if (_start_array != NULL) { | |
3484 _start_array->allocate_block(destination()); | |
3485 } | |
3486 | |
3487 if (destination() != source()) { | |
495
234c22e54b98
6784849: par compact - can fail when to_space is non-empty
jcoomes
parents:
483
diff
changeset
|
3488 DEBUG_ONLY(PSParallelCompact::check_new_location(source(), destination());) |
0 | 3489 Copy::aligned_conjoint_words(source(), destination(), words); |
3490 } | |
3491 | |
3492 oop moved_oop = (oop) destination(); | |
3493 moved_oop->update_contents(compaction_manager()); | |
3494 assert(moved_oop->is_oop_or_null(), "Object should be whole at this point"); | |
3495 | |
3496 update_state(words); | |
3497 assert(destination() == (HeapWord*)moved_oop + moved_oop->size(), "sanity"); | |
3498 return is_full() ? ParMarkBitMap::full : ParMarkBitMap::incomplete; | |
3499 } | |
3500 | |
3501 UpdateOnlyClosure::UpdateOnlyClosure(ParMarkBitMap* mbm, | |
3502 ParCompactionManager* cm, | |
3503 PSParallelCompact::SpaceId space_id) : | |
3504 ParMarkBitMapClosure(mbm, cm), | |
3505 _space_id(space_id), | |
3506 _start_array(PSParallelCompact::start_array(space_id)) | |
3507 { | |
3508 } | |
3509 | |
3510 // Updates the references in the object to their new values. | |
3511 ParMarkBitMapClosure::IterationStatus | |
3512 UpdateOnlyClosure::do_addr(HeapWord* addr, size_t words) { | |
3513 do_addr(addr); | |
3514 return ParMarkBitMap::incomplete; | |
3515 } | |
3516 | |
3517 // Verify the new location using the forwarding pointer | |
3518 // from MarkSweep::mark_sweep_phase2(). Set the mark_word | |
3519 // to the initial value. | |
3520 ParMarkBitMapClosure::IterationStatus | |
3521 PSParallelCompact::VerifyUpdateClosure::do_addr(HeapWord* addr, size_t words) { | |
3522 // The second arg (words) is not used. | |
3523 oop obj = (oop) addr; | |
3524 HeapWord* forwarding_ptr = (HeapWord*) obj->mark()->decode_pointer(); | |
3525 HeapWord* new_pointer = summary_data().calc_new_pointer(obj); | |
3526 if (forwarding_ptr == NULL) { | |
3527 // The object is dead or not moving. | |
3528 assert(bitmap()->is_unmarked(obj) || (new_pointer == (HeapWord*) obj), | |
3529 "Object liveness is wrong."); | |
3530 return ParMarkBitMap::incomplete; | |
3531 } | |
3532 assert(UseParallelOldGCDensePrefix || | |
3533 (HeapMaximumCompactionInterval > 1) || | |
3534 (MarkSweepAlwaysCompactCount > 1) || | |
3535 (forwarding_ptr == new_pointer), | |
3536 "Calculation of new location is incorrect"); | |
3537 return ParMarkBitMap::incomplete; | |
3538 } | |
3539 | |
3540 // Reset objects modified for debug checking. | |
3541 ParMarkBitMapClosure::IterationStatus | |
3542 PSParallelCompact::ResetObjectsClosure::do_addr(HeapWord* addr, size_t words) { | |
3543 // The second arg (words) is not used. | |
3544 oop obj = (oop) addr; | |
3545 obj->init_mark(); | |
3546 return ParMarkBitMap::incomplete; | |
3547 } | |
3548 | |
3549 // Prepare for compaction. This method is executed once | |
3550 // (i.e., by a single thread) before compaction. | |
3551 // Save the updated location of the intArrayKlassObj for | |
3552 // filling holes in the dense prefix. | |
3553 void PSParallelCompact::compact_prologue() { | |
3554 _updated_int_array_klass_obj = (klassOop) | |
3555 summary_data().calc_new_pointer(Universe::intArrayKlassObj()); | |
3556 } | |
3557 |