truffle: src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp annotate

annotate src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp @ 12109:faf2631b9334

8022683: JNI GetStringUTFChars should return NULL on allocation failure not abort the VM Summary: Return NULL on OOM from GetStringChars, GetStringUTFChars and Get<PrimitiveType>ArrayElements family of functions. Reviewed-by: dholmes, coleenp

author	dsimms
date	Mon, 26 Aug 2013 09:33:01 +0200
parents	1a8fb39bdbc4
children	8f07aa079343

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 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: 1387 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	26 #include "gc_implementation/parallelScavenge/adjoiningGenerations.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	27 #include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	28 #include "gc_implementation/parallelScavenge/cardTableExtension.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	29 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	30 #include "gc_implementation/parallelScavenge/generationSizer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	31 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	32 #include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	33 #include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	34 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	35 #include "gc_implementation/parallelScavenge/psPromotionManager.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	36 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	37 #include "gc_implementation/parallelScavenge/vmPSOperations.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	38 #include "gc_implementation/shared/gcHeapSummary.hpp"
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	39 #include "gc_implementation/shared/gcWhen.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	40 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	41 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	42 #include "runtime/handles.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	43 #include "runtime/java.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	44 #include "runtime/vmThread.hpp"
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6008 diff changeset	45 #include "services/memTracker.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	46 #include "utilities/vmError.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	47
a61af66fc99e Initial load duke parents: diff changeset	48 PSYoungGen* ParallelScavengeHeap::_young_gen = NULL;
a61af66fc99e Initial load duke parents: diff changeset	49 PSOldGen* ParallelScavengeHeap::_old_gen = NULL;
a61af66fc99e Initial load duke parents: diff changeset	50 PSAdaptiveSizePolicy* ParallelScavengeHeap::_size_policy = NULL;
a61af66fc99e Initial load duke parents: diff changeset	51 PSGCAdaptivePolicyCounters* ParallelScavengeHeap::_gc_policy_counters = NULL;
a61af66fc99e Initial load duke parents: diff changeset	52 ParallelScavengeHeap* ParallelScavengeHeap::_psh = NULL;
a61af66fc99e Initial load duke parents: diff changeset	53 GCTaskManager* ParallelScavengeHeap::_gc_task_manager = NULL;
a61af66fc99e Initial load duke parents: diff changeset	54
a61af66fc99e Initial load duke parents: diff changeset	55 static void trace_gen_sizes(const char* const str,
a61af66fc99e Initial load duke parents: diff changeset	56 size_t og_min, size_t og_max,
a61af66fc99e Initial load duke parents: diff changeset	57 size_t yg_min, size_t yg_max)
a61af66fc99e Initial load duke parents: diff changeset	58 {
a61af66fc99e Initial load duke parents: diff changeset	59 if (TracePageSizes) {
a61af66fc99e Initial load duke parents: diff changeset	60 tty->print_cr("%s: " SIZE_FORMAT "," SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	61 SIZE_FORMAT "," SIZE_FORMAT " "
a61af66fc99e Initial load duke parents: diff changeset	62 SIZE_FORMAT,
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	63 str,
0 a61af66fc99e Initial load duke parents: diff changeset	64 og_min / K, og_max / K,
a61af66fc99e Initial load duke parents: diff changeset	65 yg_min / K, yg_max / K,
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	66 (og_max + yg_max) / K);
0 a61af66fc99e Initial load duke parents: diff changeset	67 }
a61af66fc99e Initial load duke parents: diff changeset	68 }
a61af66fc99e Initial load duke parents: diff changeset	69
a61af66fc99e Initial load duke parents: diff changeset	70 jint ParallelScavengeHeap::initialize() {
1166 7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1027 diff changeset	71 CollectedHeap::pre_initialize();
7b0e9cba0307 6896647: card marks can be deferred too long ysr parents: 1027 diff changeset	72
0 a61af66fc99e Initial load duke parents: diff changeset	73 // Cannot be initialized until after the flags are parsed
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	74 // GenerationSizer flag_parser;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	75 _collector_policy = new GenerationSizer();
0 a61af66fc99e Initial load duke parents: diff changeset	76
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	77 size_t yg_min_size = _collector_policy->min_young_gen_size();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	78 size_t yg_max_size = _collector_policy->max_young_gen_size();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	79 size_t og_min_size = _collector_policy->min_old_gen_size();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	80 size_t og_max_size = _collector_policy->max_old_gen_size();
0 a61af66fc99e Initial load duke parents: diff changeset	81
a61af66fc99e Initial load duke parents: diff changeset	82 trace_gen_sizes("ps heap raw",
a61af66fc99e Initial load duke parents: diff changeset	83 og_min_size, og_max_size,
a61af66fc99e Initial load duke parents: diff changeset	84 yg_min_size, yg_max_size);
a61af66fc99e Initial load duke parents: diff changeset	85
a61af66fc99e Initial load duke parents: diff changeset	86 const size_t og_page_sz = os::page_size_for_region(yg_min_size + og_min_size,
a61af66fc99e Initial load duke parents: diff changeset	87 yg_max_size + og_max_size,
a61af66fc99e Initial load duke parents: diff changeset	88 8);
a61af66fc99e Initial load duke parents: diff changeset	89
a61af66fc99e Initial load duke parents: diff changeset	90 const size_t og_align = set_alignment(_old_gen_alignment, og_page_sz);
a61af66fc99e Initial load duke parents: diff changeset	91 const size_t yg_align = set_alignment(_young_gen_alignment, og_page_sz);
a61af66fc99e Initial load duke parents: diff changeset	92
a61af66fc99e Initial load duke parents: diff changeset	93 // Update sizes to reflect the selected page size(s).
a61af66fc99e Initial load duke parents: diff changeset	94 //
a61af66fc99e Initial load duke parents: diff changeset	95 // NEEDS_CLEANUP. The default TwoGenerationCollectorPolicy uses NewRatio; it
a61af66fc99e Initial load duke parents: diff changeset	96 // should check UseAdaptiveSizePolicy. Changes from generationSizer could
a61af66fc99e Initial load duke parents: diff changeset	97 // move to the common code.
a61af66fc99e Initial load duke parents: diff changeset	98 yg_min_size = align_size_up(yg_min_size, yg_align);
a61af66fc99e Initial load duke parents: diff changeset	99 yg_max_size = align_size_up(yg_max_size, yg_align);
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	100 size_t yg_cur_size =
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	101 align_size_up(_collector_policy->young_gen_size(), yg_align);
0 a61af66fc99e Initial load duke parents: diff changeset	102 yg_cur_size = MAX2(yg_cur_size, yg_min_size);
a61af66fc99e Initial load duke parents: diff changeset	103
a61af66fc99e Initial load duke parents: diff changeset	104 og_min_size = align_size_up(og_min_size, og_align);
2251 336d17dff7cc 7014874: Incorrect COOPs modes on solaris-{sparcv9,amd64} with ParallelGC kvn parents: 1972 diff changeset	105 // Align old gen size down to preserve specified heap size.
336d17dff7cc 7014874: Incorrect COOPs modes on solaris-{sparcv9,amd64} with ParallelGC kvn parents: 1972 diff changeset	106 assert(og_align == yg_align, "sanity");
336d17dff7cc 7014874: Incorrect COOPs modes on solaris-{sparcv9,amd64} with ParallelGC kvn parents: 1972 diff changeset	107 og_max_size = align_size_down(og_max_size, og_align);
336d17dff7cc 7014874: Incorrect COOPs modes on solaris-{sparcv9,amd64} with ParallelGC kvn parents: 1972 diff changeset	108 og_max_size = MAX2(og_max_size, og_min_size);
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	109 size_t og_cur_size =
2251 336d17dff7cc 7014874: Incorrect COOPs modes on solaris-{sparcv9,amd64} with ParallelGC kvn parents: 1972 diff changeset	110 align_size_down(_collector_policy->old_gen_size(), og_align);
0 a61af66fc99e Initial load duke parents: diff changeset	111 og_cur_size = MAX2(og_cur_size, og_min_size);
a61af66fc99e Initial load duke parents: diff changeset	112
a61af66fc99e Initial load duke parents: diff changeset	113 trace_gen_sizes("ps heap rnd",
a61af66fc99e Initial load duke parents: diff changeset	114 og_min_size, og_max_size,
a61af66fc99e Initial load duke parents: diff changeset	115 yg_min_size, yg_max_size);
a61af66fc99e Initial load duke parents: diff changeset	116
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	117 const size_t heap_size = og_max_size + yg_max_size;
642 660978a2a31a 6791178: Specialize for zero as the compressed oop vm heap base kvn parents: 374 diff changeset	118
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	119 ReservedSpace heap_rs = Universe::reserve_heap(heap_size, og_align);
642 660978a2a31a 6791178: Specialize for zero as the compressed oop vm heap base kvn parents: 374 diff changeset	120
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6008 diff changeset	121 MemTracker::record_virtual_memory_type((address)heap_rs.base(), mtJavaHeap);
d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 6008 diff changeset	122
0 a61af66fc99e Initial load duke parents: diff changeset	123 os::trace_page_sizes("ps main", og_min_size + yg_min_size,
a61af66fc99e Initial load duke parents: diff changeset	124 og_max_size + yg_max_size, og_page_sz,
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	125 heap_rs.base(),
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	126 heap_rs.size());
0 a61af66fc99e Initial load duke parents: diff changeset	127 if (!heap_rs.is_reserved()) {
a61af66fc99e Initial load duke parents: diff changeset	128 vm_shutdown_during_initialization(
a61af66fc99e Initial load duke parents: diff changeset	129 "Could not reserve enough space for object heap");
a61af66fc99e Initial load duke parents: diff changeset	130 return JNI_ENOMEM;
a61af66fc99e Initial load duke parents: diff changeset	131 }
a61af66fc99e Initial load duke parents: diff changeset	132
a61af66fc99e Initial load duke parents: diff changeset	133 _reserved = MemRegion((HeapWord*)heap_rs.base(),
a61af66fc99e Initial load duke parents: diff changeset	134 (HeapWord*)(heap_rs.base() + heap_rs.size()));
a61af66fc99e Initial load duke parents: diff changeset	135
a61af66fc99e Initial load duke parents: diff changeset	136 CardTableExtension* const barrier_set = new CardTableExtension(_reserved, 3);
a61af66fc99e Initial load duke parents: diff changeset	137 _barrier_set = barrier_set;
a61af66fc99e Initial load duke parents: diff changeset	138 oopDesc::set_bs(_barrier_set);
a61af66fc99e Initial load duke parents: diff changeset	139 if (_barrier_set == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	140 vm_shutdown_during_initialization(
a61af66fc99e Initial load duke parents: diff changeset	141 "Could not reserve enough space for barrier set");
a61af66fc99e Initial load duke parents: diff changeset	142 return JNI_ENOMEM;
a61af66fc99e Initial load duke parents: diff changeset	143 }
a61af66fc99e Initial load duke parents: diff changeset	144
a61af66fc99e Initial load duke parents: diff changeset	145 // Initial young gen size is 4 Mb
a61af66fc99e Initial load duke parents: diff changeset	146 //
a61af66fc99e Initial load duke parents: diff changeset	147 // XXX - what about flag_parser.young_gen_size()?
a61af66fc99e Initial load duke parents: diff changeset	148 const size_t init_young_size = align_size_up(4 * M, yg_align);
a61af66fc99e Initial load duke parents: diff changeset	149 yg_cur_size = MAX2(MIN2(init_young_size, yg_max_size), yg_cur_size);
a61af66fc99e Initial load duke parents: diff changeset	150
a61af66fc99e Initial load duke parents: diff changeset	151 // Make up the generations
a61af66fc99e Initial load duke parents: diff changeset	152 // Calculate the maximum size that a generation can grow. This
a61af66fc99e Initial load duke parents: diff changeset	153 // includes growth into the other generation. Note that the
a61af66fc99e Initial load duke parents: diff changeset	154 // parameter _max_gen_size is kept as the maximum
a61af66fc99e Initial load duke parents: diff changeset	155 // size of the generation as the boundaries currently stand.
a61af66fc99e Initial load duke parents: diff changeset	156 // _max_gen_size is still used as that value.
a61af66fc99e Initial load duke parents: diff changeset	157 double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
a61af66fc99e Initial load duke parents: diff changeset	158 double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0;
a61af66fc99e Initial load duke parents: diff changeset	159
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	160 _gens = new AdjoiningGenerations(heap_rs,
0 a61af66fc99e Initial load duke parents: diff changeset	161 og_cur_size,
a61af66fc99e Initial load duke parents: diff changeset	162 og_min_size,
a61af66fc99e Initial load duke parents: diff changeset	163 og_max_size,
a61af66fc99e Initial load duke parents: diff changeset	164 yg_cur_size,
a61af66fc99e Initial load duke parents: diff changeset	165 yg_min_size,
a61af66fc99e Initial load duke parents: diff changeset	166 yg_max_size,
a61af66fc99e Initial load duke parents: diff changeset	167 yg_align);
a61af66fc99e Initial load duke parents: diff changeset	168
a61af66fc99e Initial load duke parents: diff changeset	169 _old_gen = _gens->old_gen();
a61af66fc99e Initial load duke parents: diff changeset	170 _young_gen = _gens->young_gen();
a61af66fc99e Initial load duke parents: diff changeset	171
a61af66fc99e Initial load duke parents: diff changeset	172 const size_t eden_capacity = _young_gen->eden_space()->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	173 const size_t old_capacity = _old_gen->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	174 const size_t initial_promo_size = MIN2(eden_capacity, old_capacity);
a61af66fc99e Initial load duke parents: diff changeset	175 _size_policy =
a61af66fc99e Initial load duke parents: diff changeset	176 new PSAdaptiveSizePolicy(eden_capacity,
a61af66fc99e Initial load duke parents: diff changeset	177 initial_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	178 young_gen()->to_space()->capacity_in_bytes(),
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	179 intra_heap_alignment(),
0 a61af66fc99e Initial load duke parents: diff changeset	180 max_gc_pause_sec,
a61af66fc99e Initial load duke parents: diff changeset	181 max_gc_minor_pause_sec,
a61af66fc99e Initial load duke parents: diff changeset	182 GCTimeRatio
a61af66fc99e Initial load duke parents: diff changeset	183 );
a61af66fc99e Initial load duke parents: diff changeset	184
a61af66fc99e Initial load duke parents: diff changeset	185 assert(!UseAdaptiveGCBoundary \|\|
a61af66fc99e Initial load duke parents: diff changeset	186 (old_gen()->virtual_space()->high_boundary() ==
a61af66fc99e Initial load duke parents: diff changeset	187 young_gen()->virtual_space()->low_boundary()),
a61af66fc99e Initial load duke parents: diff changeset	188 "Boundaries must meet");
a61af66fc99e Initial load duke parents: diff changeset	189 // initialize the policy counters - 2 collectors, 3 generations
a61af66fc99e Initial load duke parents: diff changeset	190 _gc_policy_counters =
a61af66fc99e Initial load duke parents: diff changeset	191 new PSGCAdaptivePolicyCounters("ParScav:MSC", 2, 3, _size_policy);
a61af66fc99e Initial load duke parents: diff changeset	192 _psh = this;
a61af66fc99e Initial load duke parents: diff changeset	193
a61af66fc99e Initial load duke parents: diff changeset	194 // Set up the GCTaskManager
a61af66fc99e Initial load duke parents: diff changeset	195 _gc_task_manager = GCTaskManager::create(ParallelGCThreads);
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 if (UseParallelOldGC && !PSParallelCompact::initialize()) {
a61af66fc99e Initial load duke parents: diff changeset	198 return JNI_ENOMEM;
a61af66fc99e Initial load duke parents: diff changeset	199 }
a61af66fc99e Initial load duke parents: diff changeset	200
a61af66fc99e Initial load duke parents: diff changeset	201 return JNI_OK;
a61af66fc99e Initial load duke parents: diff changeset	202 }
a61af66fc99e Initial load duke parents: diff changeset	203
a61af66fc99e Initial load duke parents: diff changeset	204 void ParallelScavengeHeap::post_initialize() {
a61af66fc99e Initial load duke parents: diff changeset	205 // Need to init the tenuring threshold
a61af66fc99e Initial load duke parents: diff changeset	206 PSScavenge::initialize();
a61af66fc99e Initial load duke parents: diff changeset	207 if (UseParallelOldGC) {
a61af66fc99e Initial load duke parents: diff changeset	208 PSParallelCompact::post_initialize();
a61af66fc99e Initial load duke parents: diff changeset	209 } else {
a61af66fc99e Initial load duke parents: diff changeset	210 PSMarkSweep::initialize();
a61af66fc99e Initial load duke parents: diff changeset	211 }
a61af66fc99e Initial load duke parents: diff changeset	212 PSPromotionManager::initialize();
a61af66fc99e Initial load duke parents: diff changeset	213 }
a61af66fc99e Initial load duke parents: diff changeset	214
a61af66fc99e Initial load duke parents: diff changeset	215 void ParallelScavengeHeap::update_counters() {
a61af66fc99e Initial load duke parents: diff changeset	216 young_gen()->update_counters();
a61af66fc99e Initial load duke parents: diff changeset	217 old_gen()->update_counters();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	218 MetaspaceCounters::update_performance_counters();
12063 1a8fb39bdbc4 8014659: NPG: performance counters for compressed klass space ehelin parents: 10405 diff changeset	219 CompressedClassSpaceCounters::update_performance_counters();
0 a61af66fc99e Initial load duke parents: diff changeset	220 }
a61af66fc99e Initial load duke parents: diff changeset	221
a61af66fc99e Initial load duke parents: diff changeset	222 size_t ParallelScavengeHeap::capacity() const {
a61af66fc99e Initial load duke parents: diff changeset	223 size_t value = young_gen()->capacity_in_bytes() + old_gen()->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	224 return value;
a61af66fc99e Initial load duke parents: diff changeset	225 }
a61af66fc99e Initial load duke parents: diff changeset	226
a61af66fc99e Initial load duke parents: diff changeset	227 size_t ParallelScavengeHeap::used() const {
a61af66fc99e Initial load duke parents: diff changeset	228 size_t value = young_gen()->used_in_bytes() + old_gen()->used_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	229 return value;
a61af66fc99e Initial load duke parents: diff changeset	230 }
a61af66fc99e Initial load duke parents: diff changeset	231
a61af66fc99e Initial load duke parents: diff changeset	232 bool ParallelScavengeHeap::is_maximal_no_gc() const {
a61af66fc99e Initial load duke parents: diff changeset	233 return old_gen()->is_maximal_no_gc() && young_gen()->is_maximal_no_gc();
a61af66fc99e Initial load duke parents: diff changeset	234 }
a61af66fc99e Initial load duke parents: diff changeset	235
a61af66fc99e Initial load duke parents: diff changeset	236
a61af66fc99e Initial load duke parents: diff changeset	237 size_t ParallelScavengeHeap::max_capacity() const {
a61af66fc99e Initial load duke parents: diff changeset	238 size_t estimated = reserved_region().byte_size();
a61af66fc99e Initial load duke parents: diff changeset	239 if (UseAdaptiveSizePolicy) {
a61af66fc99e Initial load duke parents: diff changeset	240 estimated -= _size_policy->max_survivor_size(young_gen()->max_size());
a61af66fc99e Initial load duke parents: diff changeset	241 } else {
a61af66fc99e Initial load duke parents: diff changeset	242 estimated -= young_gen()->to_space()->capacity_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	243 }
a61af66fc99e Initial load duke parents: diff changeset	244 return MAX2(estimated, capacity());
a61af66fc99e Initial load duke parents: diff changeset	245 }
a61af66fc99e Initial load duke parents: diff changeset	246
a61af66fc99e Initial load duke parents: diff changeset	247 bool ParallelScavengeHeap::is_in(const void* p) const {
a61af66fc99e Initial load duke parents: diff changeset	248 if (young_gen()->is_in(p)) {
a61af66fc99e Initial load duke parents: diff changeset	249 return true;
a61af66fc99e Initial load duke parents: diff changeset	250 }
a61af66fc99e Initial load duke parents: diff changeset	251
a61af66fc99e Initial load duke parents: diff changeset	252 if (old_gen()->is_in(p)) {
a61af66fc99e Initial load duke parents: diff changeset	253 return true;
a61af66fc99e Initial load duke parents: diff changeset	254 }
a61af66fc99e Initial load duke parents: diff changeset	255
a61af66fc99e Initial load duke parents: diff changeset	256 return false;
a61af66fc99e Initial load duke parents: diff changeset	257 }
a61af66fc99e Initial load duke parents: diff changeset	258
a61af66fc99e Initial load duke parents: diff changeset	259 bool ParallelScavengeHeap::is_in_reserved(const void* p) const {
a61af66fc99e Initial load duke parents: diff changeset	260 if (young_gen()->is_in_reserved(p)) {
a61af66fc99e Initial load duke parents: diff changeset	261 return true;
a61af66fc99e Initial load duke parents: diff changeset	262 }
a61af66fc99e Initial load duke parents: diff changeset	263
a61af66fc99e Initial load duke parents: diff changeset	264 if (old_gen()->is_in_reserved(p)) {
a61af66fc99e Initial load duke parents: diff changeset	265 return true;
a61af66fc99e Initial load duke parents: diff changeset	266 }
a61af66fc99e Initial load duke parents: diff changeset	267
a61af66fc99e Initial load duke parents: diff changeset	268 return false;
a61af66fc99e Initial load duke parents: diff changeset	269 }
a61af66fc99e Initial load duke parents: diff changeset	270
3377 2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	271 bool ParallelScavengeHeap::is_scavengable(const void* addr) {
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	272 return is_in_young((oop)addr);
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	273 }
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	274
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	275 #ifdef ASSERT
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	276 // Don't implement this by using is_in_young(). This method is used
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	277 // in some cases to check that is_in_young() is correct.
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	278 bool ParallelScavengeHeap::is_in_partial_collection(const void *p) {
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	279 assert(is_in_reserved(p) \|\| p == NULL,
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	280 "Does not work if address is non-null and outside of the heap");
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	281 // The order of the generations is old (low addr), young (high addr)
3377 2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	282 return p >= old_gen()->reserved().end();
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	283 }
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	284 #endif
2aa9ddbb9e60 7041789: 30% perf regression with c2/arm following 7017732 jmasa parents: 2251 diff changeset	285
0 a61af66fc99e Initial load duke parents: diff changeset	286 // There are two levels of allocation policy here.
a61af66fc99e Initial load duke parents: diff changeset	287 //
a61af66fc99e Initial load duke parents: diff changeset	288 // When an allocation request fails, the requesting thread must invoke a VM
a61af66fc99e Initial load duke parents: diff changeset	289 // operation, transfer control to the VM thread, and await the results of a
a61af66fc99e Initial load duke parents: diff changeset	290 // garbage collection. That is quite expensive, and we should avoid doing it
a61af66fc99e Initial load duke parents: diff changeset	291 // multiple times if possible.
a61af66fc99e Initial load duke parents: diff changeset	292 //
a61af66fc99e Initial load duke parents: diff changeset	293 // To accomplish this, we have a basic allocation policy, and also a
a61af66fc99e Initial load duke parents: diff changeset	294 // failed allocation policy.
a61af66fc99e Initial load duke parents: diff changeset	295 //
a61af66fc99e Initial load duke parents: diff changeset	296 // The basic allocation policy controls how you allocate memory without
a61af66fc99e Initial load duke parents: diff changeset	297 // attempting garbage collection. It is okay to grab locks and
a61af66fc99e Initial load duke parents: diff changeset	298 // expand the heap, if that can be done without coming to a safepoint.
a61af66fc99e Initial load duke parents: diff changeset	299 // It is likely that the basic allocation policy will not be very
a61af66fc99e Initial load duke parents: diff changeset	300 // aggressive.
a61af66fc99e Initial load duke parents: diff changeset	301 //
a61af66fc99e Initial load duke parents: diff changeset	302 // The failed allocation policy is invoked from the VM thread after
a61af66fc99e Initial load duke parents: diff changeset	303 // the basic allocation policy is unable to satisfy a mem_allocate
a61af66fc99e Initial load duke parents: diff changeset	304 // request. This policy needs to cover the entire range of collection,
a61af66fc99e Initial load duke parents: diff changeset	305 // heap expansion, and out-of-memory conditions. It should make every
a61af66fc99e Initial load duke parents: diff changeset	306 // attempt to allocate the requested memory.
a61af66fc99e Initial load duke parents: diff changeset	307
a61af66fc99e Initial load duke parents: diff changeset	308 // Basic allocation policy. Should never be called at a safepoint, or
a61af66fc99e Initial load duke parents: diff changeset	309 // from the VM thread.
a61af66fc99e Initial load duke parents: diff changeset	310 //
a61af66fc99e Initial load duke parents: diff changeset	311 // This method must handle cases where many mem_allocate requests fail
a61af66fc99e Initial load duke parents: diff changeset	312 // simultaneously. When that happens, only one VM operation will succeed,
a61af66fc99e Initial load duke parents: diff changeset	313 // and the rest will not be executed. For that reason, this method loops
a61af66fc99e Initial load duke parents: diff changeset	314 // during failed allocation attempts. If the java heap becomes exhausted,
a61af66fc99e Initial load duke parents: diff changeset	315 // we rely on the size_policy object to force a bail out.
a61af66fc99e Initial load duke parents: diff changeset	316 HeapWord* ParallelScavengeHeap::mem_allocate(
a61af66fc99e Initial load duke parents: diff changeset	317 size_t size,
a61af66fc99e Initial load duke parents: diff changeset	318 bool* gc_overhead_limit_was_exceeded) {
a61af66fc99e Initial load duke parents: diff changeset	319 assert(!SafepointSynchronize::is_at_safepoint(), "should not be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	320 assert(Thread::current() != (Thread*)VMThread::vm_thread(), "should not be in vm thread");
a61af66fc99e Initial load duke parents: diff changeset	321 assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock");
a61af66fc99e Initial load duke parents: diff changeset	322
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	323 // In general gc_overhead_limit_was_exceeded should be false so
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	324 // set it so here and reset it to true only if the gc time
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	325 // limit is being exceeded as checked below.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	326 *gc_overhead_limit_was_exceeded = false;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	327
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	328 HeapWord* result = young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	329
a61af66fc99e Initial load duke parents: diff changeset	330 uint loop_count = 0;
a61af66fc99e Initial load duke parents: diff changeset	331 uint gc_count = 0;
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	332 int gclocker_stalled_count = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	333
a61af66fc99e Initial load duke parents: diff changeset	334 while (result == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	335 // We don't want to have multiple collections for a single filled generation.
a61af66fc99e Initial load duke parents: diff changeset	336 // To prevent this, each thread tracks the total_collections() value, and if
a61af66fc99e Initial load duke parents: diff changeset	337 // the count has changed, does not do a new collection.
a61af66fc99e Initial load duke parents: diff changeset	338 //
a61af66fc99e Initial load duke parents: diff changeset	339 // The collection count must be read only while holding the heap lock. VM
a61af66fc99e Initial load duke parents: diff changeset	340 // operations also hold the heap lock during collections. There is a lock
a61af66fc99e Initial load duke parents: diff changeset	341 // contention case where thread A blocks waiting on the Heap_lock, while
a61af66fc99e Initial load duke parents: diff changeset	342 // thread B is holding it doing a collection. When thread A gets the lock,
a61af66fc99e Initial load duke parents: diff changeset	343 // the collection count has already changed. To prevent duplicate collections,
a61af66fc99e Initial load duke parents: diff changeset	344 // The policy MUST attempt allocations during the same period it reads the
a61af66fc99e Initial load duke parents: diff changeset	345 // total_collections() value!
a61af66fc99e Initial load duke parents: diff changeset	346 {
a61af66fc99e Initial load duke parents: diff changeset	347 MutexLocker ml(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	348 gc_count = Universe::heap()->total_collections();
a61af66fc99e Initial load duke parents: diff changeset	349
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	350 result = young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	351 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	352 return result;
a61af66fc99e Initial load duke parents: diff changeset	353 }
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	354
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	355 // If certain conditions hold, try allocating from the old gen.
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	356 result = mem_allocate_old_gen(size);
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	357 if (result != NULL) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	358 return result;
0 a61af66fc99e Initial load duke parents: diff changeset	359 }
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	360
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	361 if (gclocker_stalled_count > GCLockerRetryAllocationCount) {
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	362 return NULL;
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	363 }
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	364
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	365 // Failed to allocate without a gc.
0 a61af66fc99e Initial load duke parents: diff changeset	366 if (GC_locker::is_active_and_needs_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	367 // If this thread is not in a jni critical section, we stall
a61af66fc99e Initial load duke parents: diff changeset	368 // the requestor until the critical section has cleared and
a61af66fc99e Initial load duke parents: diff changeset	369 // GC allowed. When the critical section clears, a GC is
a61af66fc99e Initial load duke parents: diff changeset	370 // initiated by the last thread exiting the critical section; so
a61af66fc99e Initial load duke parents: diff changeset	371 // we retry the allocation sequence from the beginning of the loop,
a61af66fc99e Initial load duke parents: diff changeset	372 // rather than causing more, now probably unnecessary, GC attempts.
a61af66fc99e Initial load duke parents: diff changeset	373 JavaThread* jthr = JavaThread::current();
a61af66fc99e Initial load duke parents: diff changeset	374 if (!jthr->in_critical()) {
a61af66fc99e Initial load duke parents: diff changeset	375 MutexUnlocker mul(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	376 GC_locker::stall_until_clear();
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8785 diff changeset	377 gclocker_stalled_count += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	378 continue;
a61af66fc99e Initial load duke parents: diff changeset	379 } else {
a61af66fc99e Initial load duke parents: diff changeset	380 if (CheckJNICalls) {
a61af66fc99e Initial load duke parents: diff changeset	381 fatal("Possible deadlock due to allocating while"
a61af66fc99e Initial load duke parents: diff changeset	382 " in jni critical section");
a61af66fc99e Initial load duke parents: diff changeset	383 }
a61af66fc99e Initial load duke parents: diff changeset	384 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	385 }
a61af66fc99e Initial load duke parents: diff changeset	386 }
a61af66fc99e Initial load duke parents: diff changeset	387 }
a61af66fc99e Initial load duke parents: diff changeset	388
a61af66fc99e Initial load duke parents: diff changeset	389 if (result == NULL) {
a61af66fc99e Initial load duke parents: diff changeset	390 // Generate a VM operation
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	391 VM_ParallelGCFailedAllocation op(size, gc_count);
0 a61af66fc99e Initial load duke parents: diff changeset	392 VMThread::execute(&op);
a61af66fc99e Initial load duke parents: diff changeset	393
a61af66fc99e Initial load duke parents: diff changeset	394 // Did the VM operation execute? If so, return the result directly.
a61af66fc99e Initial load duke parents: diff changeset	395 // This prevents us from looping until time out on requests that can
a61af66fc99e Initial load duke parents: diff changeset	396 // not be satisfied.
a61af66fc99e Initial load duke parents: diff changeset	397 if (op.prologue_succeeded()) {
a61af66fc99e Initial load duke parents: diff changeset	398 assert(Universe::heap()->is_in_or_null(op.result()),
a61af66fc99e Initial load duke parents: diff changeset	399 "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	400
a61af66fc99e Initial load duke parents: diff changeset	401 // If GC was locked out during VM operation then retry allocation
a61af66fc99e Initial load duke parents: diff changeset	402 // and/or stall as necessary.
a61af66fc99e Initial load duke parents: diff changeset	403 if (op.gc_locked()) {
a61af66fc99e Initial load duke parents: diff changeset	404 assert(op.result() == NULL, "must be NULL if gc_locked() is true");
a61af66fc99e Initial load duke parents: diff changeset	405 continue; // retry and/or stall as necessary
a61af66fc99e Initial load duke parents: diff changeset	406 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	407
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	408 // Exit the loop if the gc time limit has been exceeded.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	409 // The allocation must have failed above ("result" guarding
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	410 // this path is NULL) and the most recent collection has exceeded the
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	411 // gc overhead limit (although enough may have been collected to
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	412 // satisfy the allocation). Exit the loop so that an out-of-memory
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	413 // will be thrown (return a NULL ignoring the contents of
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	414 // op.result()),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	415 // but clear gc_overhead_limit_exceeded so that the next collection
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	416 // starts with a clean slate (i.e., forgets about previous overhead
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	417 // excesses). Fill op.result() with a filler object so that the
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	418 // heap remains parsable.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	419 const bool limit_exceeded = size_policy()->gc_overhead_limit_exceeded();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	420 const bool softrefs_clear = collector_policy()->all_soft_refs_clear();
8743 82657b6a8cc0 6976528: PS: assert(!limit_exceeded \|\| softrefs_clear) failed: Should have been cleared jmasa parents: 6725 diff changeset	421
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	422 if (limit_exceeded && softrefs_clear) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	423 *gc_overhead_limit_was_exceeded = true;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	424 size_policy()->set_gc_overhead_limit_exceeded(false);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	425 if (PrintGCDetails && Verbose) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	426 gclog_or_tty->print_cr("ParallelScavengeHeap::mem_allocate: "
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	427 "return NULL because gc_overhead_limit_exceeded is set");
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	428 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	429 if (op.result() != NULL) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	430 CollectedHeap::fill_with_object(op.result(), size);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	431 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	432 return NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	433 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1166 diff changeset	434
0 a61af66fc99e Initial load duke parents: diff changeset	435 return op.result();
a61af66fc99e Initial load duke parents: diff changeset	436 }
a61af66fc99e Initial load duke parents: diff changeset	437 }
a61af66fc99e Initial load duke parents: diff changeset	438
a61af66fc99e Initial load duke parents: diff changeset	439 // The policy object will prevent us from looping forever. If the
a61af66fc99e Initial load duke parents: diff changeset	440 // time spent in gc crosses a threshold, we will bail out.
a61af66fc99e Initial load duke parents: diff changeset	441 loop_count++;
a61af66fc99e Initial load duke parents: diff changeset	442 if ((result == NULL) && (QueuedAllocationWarningCount > 0) &&
a61af66fc99e Initial load duke parents: diff changeset	443 (loop_count % QueuedAllocationWarningCount == 0)) {
a61af66fc99e Initial load duke parents: diff changeset	444 warning("ParallelScavengeHeap::mem_allocate retries %d times \n\t"
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	445 " size=%d", loop_count, size);
0 a61af66fc99e Initial load duke parents: diff changeset	446 }
a61af66fc99e Initial load duke parents: diff changeset	447 }
a61af66fc99e Initial load duke parents: diff changeset	448
a61af66fc99e Initial load duke parents: diff changeset	449 return result;
a61af66fc99e Initial load duke parents: diff changeset	450 }
a61af66fc99e Initial load duke parents: diff changeset	451
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	452 // A "death march" is a series of ultra-slow allocations in which a full gc is
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	453 // done before each allocation, and after the full gc the allocation still
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	454 // cannot be satisfied from the young gen. This routine detects that condition;
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	455 // it should be called after a full gc has been done and the allocation
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	456 // attempted from the young gen. The parameter 'addr' should be the result of
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	457 // that young gen allocation attempt.
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	458 void
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	459 ParallelScavengeHeap::death_march_check(HeapWord* const addr, size_t size) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	460 if (addr != NULL) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	461 _death_march_count = 0; // death march has ended
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	462 } else if (_death_march_count == 0) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	463 if (should_alloc_in_eden(size)) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	464 _death_march_count = 1; // death march has started
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	465 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	466 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	467 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	468
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	469 HeapWord* ParallelScavengeHeap::mem_allocate_old_gen(size_t size) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	470 if (!should_alloc_in_eden(size) \|\| GC_locker::is_active_and_needs_gc()) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	471 // Size is too big for eden, or gc is locked out.
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	472 return old_gen()->allocate(size);
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	473 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	474
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	475 // If a "death march" is in progress, allocate from the old gen a limited
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	476 // number of times before doing a GC.
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	477 if (_death_march_count > 0) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	478 if (_death_march_count < 64) {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	479 ++_death_march_count;
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	480 return old_gen()->allocate(size);
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	481 } else {
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	482 _death_march_count = 0;
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	483 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	484 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	485 return NULL;
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	486 }
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	487
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	488 void ParallelScavengeHeap::do_full_collection(bool clear_all_soft_refs) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	489 if (UseParallelOldGC) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	490 // The do_full_collection() parameter clear_all_soft_refs
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	491 // is interpreted here as maximum_compaction which will
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	492 // cause SoftRefs to be cleared.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	493 bool maximum_compaction = clear_all_soft_refs;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	494 PSParallelCompact::invoke(maximum_compaction);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	495 } else {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	496 PSMarkSweep::invoke(clear_all_soft_refs);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	497 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	498 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	499
0 a61af66fc99e Initial load duke parents: diff changeset	500 // Failed allocation policy. Must be called from the VM thread, and
a61af66fc99e Initial load duke parents: diff changeset	501 // only at a safepoint! Note that this method has policy for allocation
a61af66fc99e Initial load duke parents: diff changeset	502 // flow, and NOT collection policy. So we do not check for gc collection
a61af66fc99e Initial load duke parents: diff changeset	503 // time over limit here, that is the responsibility of the heap specific
a61af66fc99e Initial load duke parents: diff changeset	504 // collection methods. This method decides where to attempt allocations,
a61af66fc99e Initial load duke parents: diff changeset	505 // and when to attempt collections, but no collection specific policy.
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	506 HeapWord* ParallelScavengeHeap::failed_mem_allocate(size_t size) {
0 a61af66fc99e Initial load duke parents: diff changeset	507 assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
a61af66fc99e Initial load duke parents: diff changeset	508 assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
a61af66fc99e Initial load duke parents: diff changeset	509 assert(!Universe::heap()->is_gc_active(), "not reentrant");
a61af66fc99e Initial load duke parents: diff changeset	510 assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock");
a61af66fc99e Initial load duke parents: diff changeset	511
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	512 // We assume that allocation in eden will fail unless we collect.
0 a61af66fc99e Initial load duke parents: diff changeset	513
a61af66fc99e Initial load duke parents: diff changeset	514 // First level allocation failure, scavenge and allocate in young gen.
a61af66fc99e Initial load duke parents: diff changeset	515 GCCauseSetter gccs(this, GCCause::_allocation_failure);
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	516 const bool invoked_full_gc = PSScavenge::invoke();
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	517 HeapWord* result = young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	518
a61af66fc99e Initial load duke parents: diff changeset	519 // Second level allocation failure.
a61af66fc99e Initial load duke parents: diff changeset	520 // Mark sweep and allocate in young generation.
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	521 if (result == NULL && !invoked_full_gc) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	522 do_full_collection(false);
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	523 result = young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	524 }
a61af66fc99e Initial load duke parents: diff changeset	525
4914 23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	526 death_march_check(result, size);
23c0eb012d6f 6330863: vm/gc/InfiniteList.java fails intermittently due to timeout jcoomes parents: 4073 diff changeset	527
0 a61af66fc99e Initial load duke parents: diff changeset	528 // Third level allocation failure.
a61af66fc99e Initial load duke parents: diff changeset	529 // After mark sweep and young generation allocation failure,
a61af66fc99e Initial load duke parents: diff changeset	530 // allocate in old generation.
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	531 if (result == NULL) {
c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	532 result = old_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	533 }
a61af66fc99e Initial load duke parents: diff changeset	534
a61af66fc99e Initial load duke parents: diff changeset	535 // Fourth level allocation failure. We're running out of memory.
a61af66fc99e Initial load duke parents: diff changeset	536 // More complete mark sweep and allocate in young generation.
a61af66fc99e Initial load duke parents: diff changeset	537 if (result == NULL) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	538 do_full_collection(true);
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	539 result = young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	540 }
a61af66fc99e Initial load duke parents: diff changeset	541
a61af66fc99e Initial load duke parents: diff changeset	542 // Fifth level allocation failure.
a61af66fc99e Initial load duke parents: diff changeset	543 // After more complete mark sweep, allocate in old generation.
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	544 if (result == NULL) {
c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	545 result = old_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	546 }
a61af66fc99e Initial load duke parents: diff changeset	547
a61af66fc99e Initial load duke parents: diff changeset	548 return result;
a61af66fc99e Initial load duke parents: diff changeset	549 }
a61af66fc99e Initial load duke parents: diff changeset	550
a61af66fc99e Initial load duke parents: diff changeset	551 void ParallelScavengeHeap::ensure_parsability(bool retire_tlabs) {
a61af66fc99e Initial load duke parents: diff changeset	552 CollectedHeap::ensure_parsability(retire_tlabs);
a61af66fc99e Initial load duke parents: diff changeset	553 young_gen()->eden_space()->ensure_parsability();
a61af66fc99e Initial load duke parents: diff changeset	554 }
a61af66fc99e Initial load duke parents: diff changeset	555
a61af66fc99e Initial load duke parents: diff changeset	556 size_t ParallelScavengeHeap::unsafe_max_alloc() {
a61af66fc99e Initial load duke parents: diff changeset	557 return young_gen()->eden_space()->free_in_bytes();
a61af66fc99e Initial load duke parents: diff changeset	558 }
a61af66fc99e Initial load duke parents: diff changeset	559
a61af66fc99e Initial load duke parents: diff changeset	560 size_t ParallelScavengeHeap::tlab_capacity(Thread* thr) const {
a61af66fc99e Initial load duke parents: diff changeset	561 return young_gen()->eden_space()->tlab_capacity(thr);
a61af66fc99e Initial load duke parents: diff changeset	562 }
a61af66fc99e Initial load duke parents: diff changeset	563
a61af66fc99e Initial load duke parents: diff changeset	564 size_t ParallelScavengeHeap::unsafe_max_tlab_alloc(Thread* thr) const {
a61af66fc99e Initial load duke parents: diff changeset	565 return young_gen()->eden_space()->unsafe_max_tlab_alloc(thr);
a61af66fc99e Initial load duke parents: diff changeset	566 }
a61af66fc99e Initial load duke parents: diff changeset	567
a61af66fc99e Initial load duke parents: diff changeset	568 HeapWord* ParallelScavengeHeap::allocate_new_tlab(size_t size) {
3774 c9ca3f51cf41 6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap tonyp parents: 3772 diff changeset	569 return young_gen()->allocate(size);
0 a61af66fc99e Initial load duke parents: diff changeset	570 }
a61af66fc99e Initial load duke parents: diff changeset	571
a61af66fc99e Initial load duke parents: diff changeset	572 void ParallelScavengeHeap::accumulate_statistics_all_tlabs() {
a61af66fc99e Initial load duke parents: diff changeset	573 CollectedHeap::accumulate_statistics_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	574 }
a61af66fc99e Initial load duke parents: diff changeset	575
a61af66fc99e Initial load duke parents: diff changeset	576 void ParallelScavengeHeap::resize_all_tlabs() {
a61af66fc99e Initial load duke parents: diff changeset	577 CollectedHeap::resize_all_tlabs();
a61af66fc99e Initial load duke parents: diff changeset	578 }
a61af66fc99e Initial load duke parents: diff changeset	579
1027 39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	580 bool ParallelScavengeHeap::can_elide_initializing_store_barrier(oop new_obj) {
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	581 // We don't need barriers for stores to objects in the
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	582 // young gen and, a fortiori, for initializing stores to
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	583 // objects therein.
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	584 return is_in_young(new_obj);
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	585 }
39b01ab7035a 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning ysr parents: 989 diff changeset	586
0 a61af66fc99e Initial load duke parents: diff changeset	587 // This method is used by System.gc() and JVMTI.
a61af66fc99e Initial load duke parents: diff changeset	588 void ParallelScavengeHeap::collect(GCCause::Cause cause) {
a61af66fc99e Initial load duke parents: diff changeset	589 assert(!Heap_lock->owned_by_self(),
a61af66fc99e Initial load duke parents: diff changeset	590 "this thread should not own the Heap_lock");
a61af66fc99e Initial load duke parents: diff changeset	591
a61af66fc99e Initial load duke parents: diff changeset	592 unsigned int gc_count = 0;
a61af66fc99e Initial load duke parents: diff changeset	593 unsigned int full_gc_count = 0;
a61af66fc99e Initial load duke parents: diff changeset	594 {
a61af66fc99e Initial load duke parents: diff changeset	595 MutexLocker ml(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	596 // This value is guarded by the Heap_lock
a61af66fc99e Initial load duke parents: diff changeset	597 gc_count = Universe::heap()->total_collections();
a61af66fc99e Initial load duke parents: diff changeset	598 full_gc_count = Universe::heap()->total_full_collections();
a61af66fc99e Initial load duke parents: diff changeset	599 }
a61af66fc99e Initial load duke parents: diff changeset	600
a61af66fc99e Initial load duke parents: diff changeset	601 VM_ParallelGCSystemGC op(gc_count, full_gc_count, cause);
a61af66fc99e Initial load duke parents: diff changeset	602 VMThread::execute(&op);
a61af66fc99e Initial load duke parents: diff changeset	603 }
a61af66fc99e Initial load duke parents: diff changeset	604
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	605 void ParallelScavengeHeap::oop_iterate(ExtendedOopClosure* cl) {
0 a61af66fc99e Initial load duke parents: diff changeset	606 Unimplemented();
a61af66fc99e Initial load duke parents: diff changeset	607 }
a61af66fc99e Initial load duke parents: diff changeset	608
a61af66fc99e Initial load duke parents: diff changeset	609 void ParallelScavengeHeap::object_iterate(ObjectClosure* cl) {
a61af66fc99e Initial load duke parents: diff changeset	610 young_gen()->object_iterate(cl);
a61af66fc99e Initial load duke parents: diff changeset	611 old_gen()->object_iterate(cl);
a61af66fc99e Initial load duke parents: diff changeset	612 }
a61af66fc99e Initial load duke parents: diff changeset	613
a61af66fc99e Initial load duke parents: diff changeset	614
a61af66fc99e Initial load duke parents: diff changeset	615 HeapWord* ParallelScavengeHeap::block_start(const void* addr) const {
a61af66fc99e Initial load duke parents: diff changeset	616 if (young_gen()->is_in_reserved(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	617 assert(young_gen()->is_in(addr),
a61af66fc99e Initial load duke parents: diff changeset	618 "addr should be in allocated part of young gen");
1907 1e9a9d2e6509 6970683: improvements to hs_err output never parents: 1552 diff changeset	619 // called from os::print_location by find or VMError
1e9a9d2e6509 6970683: improvements to hs_err output never parents: 1552 diff changeset	620 if (Debugging \|\| VMError::fatal_error_in_progress()) return NULL;
0 a61af66fc99e Initial load duke parents: diff changeset	621 Unimplemented();
a61af66fc99e Initial load duke parents: diff changeset	622 } else if (old_gen()->is_in_reserved(addr)) {
a61af66fc99e Initial load duke parents: diff changeset	623 assert(old_gen()->is_in(addr),
a61af66fc99e Initial load duke parents: diff changeset	624 "addr should be in allocated part of old gen");
a61af66fc99e Initial load duke parents: diff changeset	625 return old_gen()->start_array()->object_start((HeapWord*)addr);
a61af66fc99e Initial load duke parents: diff changeset	626 }
a61af66fc99e Initial load duke parents: diff changeset	627 return 0;
a61af66fc99e Initial load duke parents: diff changeset	628 }
a61af66fc99e Initial load duke parents: diff changeset	629
a61af66fc99e Initial load duke parents: diff changeset	630 size_t ParallelScavengeHeap::block_size(const HeapWord* addr) const {
a61af66fc99e Initial load duke parents: diff changeset	631 return oop(addr)->size();
a61af66fc99e Initial load duke parents: diff changeset	632 }
a61af66fc99e Initial load duke parents: diff changeset	633
a61af66fc99e Initial load duke parents: diff changeset	634 bool ParallelScavengeHeap::block_is_obj(const HeapWord* addr) const {
a61af66fc99e Initial load duke parents: diff changeset	635 return block_start(addr) == addr;
a61af66fc99e Initial load duke parents: diff changeset	636 }
a61af66fc99e Initial load duke parents: diff changeset	637
a61af66fc99e Initial load duke parents: diff changeset	638 jlong ParallelScavengeHeap::millis_since_last_gc() {
a61af66fc99e Initial load duke parents: diff changeset	639 return UseParallelOldGC ?
a61af66fc99e Initial load duke parents: diff changeset	640 PSParallelCompact::millis_since_last_gc() :
a61af66fc99e Initial load duke parents: diff changeset	641 PSMarkSweep::millis_since_last_gc();
a61af66fc99e Initial load duke parents: diff changeset	642 }
a61af66fc99e Initial load duke parents: diff changeset	643
a61af66fc99e Initial load duke parents: diff changeset	644 void ParallelScavengeHeap::prepare_for_verify() {
a61af66fc99e Initial load duke parents: diff changeset	645 ensure_parsability(false); // no need to retire TLABs for verification
a61af66fc99e Initial load duke parents: diff changeset	646 }
a61af66fc99e Initial load duke parents: diff changeset	647
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	648 PSHeapSummary ParallelScavengeHeap::create_ps_heap_summary() {
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	649 PSOldGen* old = old_gen();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	650 HeapWord* old_committed_end = (HeapWord*)old->virtual_space()->committed_high_addr();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	651 VirtualSpaceSummary old_summary(old->reserved().start(), old_committed_end, old->reserved().end());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	652 SpaceSummary old_space(old->reserved().start(), old_committed_end, old->used_in_bytes());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	653
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	654 PSYoungGen* young = young_gen();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	655 VirtualSpaceSummary young_summary(young->reserved().start(),
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	656 (HeapWord*)young->virtual_space()->committed_high_addr(), young->reserved().end());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	657
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	658 MutableSpace* eden = young_gen()->eden_space();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	659 SpaceSummary eden_space(eden->bottom(), eden->end(), eden->used_in_bytes());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	660
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	661 MutableSpace* from = young_gen()->from_space();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	662 SpaceSummary from_space(from->bottom(), from->end(), from->used_in_bytes());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	663
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	664 MutableSpace* to = young_gen()->to_space();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	665 SpaceSummary to_space(to->bottom(), to->end(), to->used_in_bytes());
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	666
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	667 VirtualSpaceSummary heap_summary = create_heap_space_summary();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	668 return PSHeapSummary(heap_summary, used(), old_summary, old_space, young_summary, eden_space, from_space, to_space);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	669 }
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	670
0 a61af66fc99e Initial load duke parents: diff changeset	671 void ParallelScavengeHeap::print_on(outputStream* st) const {
a61af66fc99e Initial load duke parents: diff changeset	672 young_gen()->print_on(st);
a61af66fc99e Initial load duke parents: diff changeset	673 old_gen()->print_on(st);
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	674 MetaspaceAux::print_on(st);
0 a61af66fc99e Initial load duke parents: diff changeset	675 }
a61af66fc99e Initial load duke parents: diff changeset	676
9076 7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	677 void ParallelScavengeHeap::print_on_error(outputStream* st) const {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	678 this->CollectedHeap::print_on_error(st);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	679
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	680 if (UseParallelOldGC) {
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	681 st->cr();
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	682 PSParallelCompact::print_on_error(st);
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	683 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	684 }
7b835924c31c 8011872: Include Bit Map addresses in the hs_err files stefank parents: 8853 diff changeset	685
0 a61af66fc99e Initial load duke parents: diff changeset	686 void ParallelScavengeHeap::gc_threads_do(ThreadClosure* tc) const {
a61af66fc99e Initial load duke parents: diff changeset	687 PSScavenge::gc_task_manager()->threads_do(tc);
a61af66fc99e Initial load duke parents: diff changeset	688 }
a61af66fc99e Initial load duke parents: diff changeset	689
a61af66fc99e Initial load duke parents: diff changeset	690 void ParallelScavengeHeap::print_gc_threads_on(outputStream* st) const {
a61af66fc99e Initial load duke parents: diff changeset	691 PSScavenge::gc_task_manager()->print_threads_on(st);
a61af66fc99e Initial load duke parents: diff changeset	692 }
a61af66fc99e Initial load duke parents: diff changeset	693
a61af66fc99e Initial load duke parents: diff changeset	694 void ParallelScavengeHeap::print_tracing_info() const {
a61af66fc99e Initial load duke parents: diff changeset	695 if (TraceGen0Time) {
a61af66fc99e Initial load duke parents: diff changeset	696 double time = PSScavenge::accumulated_time()->seconds();
a61af66fc99e Initial load duke parents: diff changeset	697 tty->print_cr("[Accumulated GC generation 0 time %3.7f secs]", time);
a61af66fc99e Initial load duke parents: diff changeset	698 }
a61af66fc99e Initial load duke parents: diff changeset	699 if (TraceGen1Time) {
8785 3c226052f7dc 6733980: par compact - TraceGen1Time always shows 0.0000 seconds tschatzl parents: 8743 diff changeset	700 double time = UseParallelOldGC ? PSParallelCompact::accumulated_time()->seconds() : PSMarkSweep::accumulated_time()->seconds();
0 a61af66fc99e Initial load duke parents: diff changeset	701 tty->print_cr("[Accumulated GC generation 1 time %3.7f secs]", time);
a61af66fc99e Initial load duke parents: diff changeset	702 }
a61af66fc99e Initial load duke parents: diff changeset	703 }
a61af66fc99e Initial load duke parents: diff changeset	704
a61af66fc99e Initial load duke parents: diff changeset	705
6008 b632e80fc9dc 4988100: oop_verify_old_oop appears to be dead brutisso parents: 4914 diff changeset	706 void ParallelScavengeHeap::verify(bool silent, VerifyOption option /* ignored */) {
0 a61af66fc99e Initial load duke parents: diff changeset	707 // Why do we need the total_collections()-filter below?
a61af66fc99e Initial load duke parents: diff changeset	708 if (total_collections() > 0) {
a61af66fc99e Initial load duke parents: diff changeset	709 if (!silent) {
a61af66fc99e Initial load duke parents: diff changeset	710 gclog_or_tty->print("tenured ");
a61af66fc99e Initial load duke parents: diff changeset	711 }
6008 b632e80fc9dc 4988100: oop_verify_old_oop appears to be dead brutisso parents: 4914 diff changeset	712 old_gen()->verify();
0 a61af66fc99e Initial load duke parents: diff changeset	713
a61af66fc99e Initial load duke parents: diff changeset	714 if (!silent) {
a61af66fc99e Initial load duke parents: diff changeset	715 gclog_or_tty->print("eden ");
a61af66fc99e Initial load duke parents: diff changeset	716 }
6008 b632e80fc9dc 4988100: oop_verify_old_oop appears to be dead brutisso parents: 4914 diff changeset	717 young_gen()->verify();
0 a61af66fc99e Initial load duke parents: diff changeset	718 }
a61af66fc99e Initial load duke parents: diff changeset	719 }
a61af66fc99e Initial load duke parents: diff changeset	720
a61af66fc99e Initial load duke parents: diff changeset	721 void ParallelScavengeHeap::print_heap_change(size_t prev_used) {
a61af66fc99e Initial load duke parents: diff changeset	722 if (PrintGCDetails && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	723 gclog_or_tty->print(" " SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	724 "->" SIZE_FORMAT
a61af66fc99e Initial load duke parents: diff changeset	725 "(" SIZE_FORMAT ")",
a61af66fc99e Initial load duke parents: diff changeset	726 prev_used, used(), capacity());
a61af66fc99e Initial load duke parents: diff changeset	727 } else {
a61af66fc99e Initial load duke parents: diff changeset	728 gclog_or_tty->print(" " SIZE_FORMAT "K"
a61af66fc99e Initial load duke parents: diff changeset	729 "->" SIZE_FORMAT "K"
a61af66fc99e Initial load duke parents: diff changeset	730 "(" SIZE_FORMAT "K)",
a61af66fc99e Initial load duke parents: diff changeset	731 prev_used / K, used() / K, capacity() / K);
a61af66fc99e Initial load duke parents: diff changeset	732 }
a61af66fc99e Initial load duke parents: diff changeset	733 }
a61af66fc99e Initial load duke parents: diff changeset	734
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	735 void ParallelScavengeHeap::trace_heap(GCWhen::Type when, GCTracer* gc_tracer) {
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	736 const PSHeapSummary& heap_summary = create_ps_heap_summary();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	737 const MetaspaceSummary& metaspace_summary = create_metaspace_summary();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	738 gc_tracer->report_gc_heap_summary(when, heap_summary, metaspace_summary);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	739 }
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 9076 diff changeset	740
0 a61af66fc99e Initial load duke parents: diff changeset	741 ParallelScavengeHeap* ParallelScavengeHeap::heap() {
a61af66fc99e Initial load duke parents: diff changeset	742 assert(_psh != NULL, "Uninitialized access to ParallelScavengeHeap::heap()");
a61af66fc99e Initial load duke parents: diff changeset	743 assert(_psh->kind() == CollectedHeap::ParallelScavengeHeap, "not a parallel scavenge heap");
a61af66fc99e Initial load duke parents: diff changeset	744 return _psh;
a61af66fc99e Initial load duke parents: diff changeset	745 }
a61af66fc99e Initial load duke parents: diff changeset	746
a61af66fc99e Initial load duke parents: diff changeset	747 // Before delegating the resize to the young generation,
a61af66fc99e Initial load duke parents: diff changeset	748 // the reserved space for the young and old generations
a61af66fc99e Initial load duke parents: diff changeset	749 // may be changed to accomodate the desired resize.
a61af66fc99e Initial load duke parents: diff changeset	750 void ParallelScavengeHeap::resize_young_gen(size_t eden_size,
a61af66fc99e Initial load duke parents: diff changeset	751 size_t survivor_size) {
a61af66fc99e Initial load duke parents: diff changeset	752 if (UseAdaptiveGCBoundary) {
a61af66fc99e Initial load duke parents: diff changeset	753 if (size_policy()->bytes_absorbed_from_eden() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	754 size_policy()->reset_bytes_absorbed_from_eden();
a61af66fc99e Initial load duke parents: diff changeset	755 return; // The generation changed size already.
a61af66fc99e Initial load duke parents: diff changeset	756 }
a61af66fc99e Initial load duke parents: diff changeset	757 gens()->adjust_boundary_for_young_gen_needs(eden_size, survivor_size);
a61af66fc99e Initial load duke parents: diff changeset	758 }
a61af66fc99e Initial load duke parents: diff changeset	759
a61af66fc99e Initial load duke parents: diff changeset	760 // Delegate the resize to the generation.
a61af66fc99e Initial load duke parents: diff changeset	761 _young_gen->resize(eden_size, survivor_size);
a61af66fc99e Initial load duke parents: diff changeset	762 }
a61af66fc99e Initial load duke parents: diff changeset	763
a61af66fc99e Initial load duke parents: diff changeset	764 // Before delegating the resize to the old generation,
a61af66fc99e Initial load duke parents: diff changeset	765 // the reserved space for the young and old generations
a61af66fc99e Initial load duke parents: diff changeset	766 // may be changed to accomodate the desired resize.
a61af66fc99e Initial load duke parents: diff changeset	767 void ParallelScavengeHeap::resize_old_gen(size_t desired_free_space) {
a61af66fc99e Initial load duke parents: diff changeset	768 if (UseAdaptiveGCBoundary) {
a61af66fc99e Initial load duke parents: diff changeset	769 if (size_policy()->bytes_absorbed_from_eden() != 0) {
a61af66fc99e Initial load duke parents: diff changeset	770 size_policy()->reset_bytes_absorbed_from_eden();
a61af66fc99e Initial load duke parents: diff changeset	771 return; // The generation changed size already.
a61af66fc99e Initial load duke parents: diff changeset	772 }
a61af66fc99e Initial load duke parents: diff changeset	773 gens()->adjust_boundary_for_old_gen_needs(desired_free_space);
a61af66fc99e Initial load duke parents: diff changeset	774 }
a61af66fc99e Initial load duke parents: diff changeset	775
a61af66fc99e Initial load duke parents: diff changeset	776 // Delegate the resize to the generation.
a61af66fc99e Initial load duke parents: diff changeset	777 _old_gen->resize(desired_free_space);
a61af66fc99e Initial load duke parents: diff changeset	778 }
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	779
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	780 ParallelScavengeHeap::ParStrongRootsScope::ParStrongRootsScope() {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	781 // nothing particular
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	782 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	783
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	784 ParallelScavengeHeap::ParStrongRootsScope::~ParStrongRootsScope() {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	785 // nothing particular
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	786 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 845 diff changeset	787
263 12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	788 #ifndef PRODUCT
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	789 void ParallelScavengeHeap::record_gen_tops_before_GC() {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	790 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	791 young_gen()->record_spaces_top();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	792 old_gen()->record_spaces_top();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	793 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	794 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	795
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	796 void ParallelScavengeHeap::gen_mangle_unused_area() {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	797 if (ZapUnusedHeapArea) {
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	798 young_gen()->eden_space()->mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	799 young_gen()->to_space()->mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	800 young_gen()->from_space()->mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	801 old_gen()->object_space()->mangle_unused_area();
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	802 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	803 }
12eea04c8b06 6672698: mangle_unused_area() should not remangle the entire heap at each collection. jmasa parents: 139 diff changeset	804 #endif

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.cpp @ 12109:faf2631b9334