author | pliden |
Tue, 31 Mar 2015 08:27:30 +0200 | |
changeset 29803 | 6e259ffa8b72 |
parent 29078 | 3b7dd035c20b |
child 30152 | 5fe1c8494b49 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
29078 | 2 |
* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. |
1 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 |
* |
|
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* This code is free software; you can redistribute it and/or modify it |
|
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* under the terms of the GNU General Public License version 2 only, as |
|
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* published by the Free Software Foundation. |
|
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* |
|
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* This code is distributed in the hope that it will be useful, but WITHOUT |
|
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
|
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* accompanied this code). |
|
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* |
|
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* You should have received a copy of the GNU General Public License version |
|
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* 2 along with this work; if not, write to the Free Software Foundation, |
|
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
1 | 22 |
* |
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*/ |
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||
7397 | 25 |
#include "precompiled.hpp" |
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#include "gc_implementation/parallelScavenge/adjoiningGenerations.hpp" |
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#include "gc_implementation/parallelScavenge/adjoiningVirtualSpaces.hpp" |
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#include "gc_implementation/parallelScavenge/cardTableExtension.hpp" |
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#include "gc_implementation/parallelScavenge/gcTaskManager.hpp" |
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#include "gc_implementation/parallelScavenge/generationSizer.hpp" |
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#include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp" |
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#include "gc_implementation/parallelScavenge/psAdaptiveSizePolicy.hpp" |
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#include "gc_implementation/parallelScavenge/psMarkSweep.hpp" |
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#include "gc_implementation/parallelScavenge/psParallelCompact.hpp" |
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35 |
#include "gc_implementation/parallelScavenge/psPromotionManager.hpp" |
|
36 |
#include "gc_implementation/parallelScavenge/psScavenge.hpp" |
|
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#include "gc_implementation/parallelScavenge/vmPSOperations.hpp" |
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18025 | 38 |
#include "gc_implementation/shared/gcHeapSummary.hpp" |
39 |
#include "gc_implementation/shared/gcWhen.hpp" |
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7397 | 40 |
#include "memory/gcLocker.inline.hpp" |
41 |
#include "oops/oop.inline.hpp" |
|
42 |
#include "runtime/handles.inline.hpp" |
|
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#include "runtime/java.hpp" |
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#include "runtime/vmThread.hpp" |
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13195 | 45 |
#include "services/memTracker.hpp" |
7397 | 46 |
#include "utilities/vmError.hpp" |
1 | 47 |
|
48 |
PSYoungGen* ParallelScavengeHeap::_young_gen = NULL; |
|
49 |
PSOldGen* ParallelScavengeHeap::_old_gen = NULL; |
|
50 |
PSAdaptiveSizePolicy* ParallelScavengeHeap::_size_policy = NULL; |
|
51 |
PSGCAdaptivePolicyCounters* ParallelScavengeHeap::_gc_policy_counters = NULL; |
|
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ParallelScavengeHeap* ParallelScavengeHeap::_psh = NULL; |
|
53 |
GCTaskManager* ParallelScavengeHeap::_gc_task_manager = NULL; |
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||
55 |
jint ParallelScavengeHeap::initialize() { |
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CollectedHeap::pre_initialize(); |
57 |
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// Initialize collector policy |
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_collector_policy = new GenerationSizer(); |
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_collector_policy->initialize_all(); |
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const size_t heap_size = _collector_policy->max_heap_byte_size(); |
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ReservedSpace heap_rs = Universe::reserve_heap(heap_size, _collector_policy->heap_alignment()); |
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MemTracker::record_virtual_memory_type((address)heap_rs.base(), mtJavaHeap); |
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os::trace_page_sizes("ps main", _collector_policy->min_heap_byte_size(), |
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heap_size, generation_alignment(), |
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heap_rs.base(), |
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heap_rs.size()); |
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if (!heap_rs.is_reserved()) { |
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vm_shutdown_during_initialization( |
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"Could not reserve enough space for object heap"); |
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return JNI_ENOMEM; |
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} |
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||
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initialize_reserved_region((HeapWord*)heap_rs.base(), (HeapWord*)(heap_rs.base() + heap_rs.size())); |
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CardTableExtension* const barrier_set = new CardTableExtension(reserved_region()); |
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barrier_set->initialize(); |
1 | 81 |
_barrier_set = barrier_set; |
82 |
oopDesc::set_bs(_barrier_set); |
|
83 |
if (_barrier_set == NULL) { |
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vm_shutdown_during_initialization( |
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"Could not reserve enough space for barrier set"); |
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return JNI_ENOMEM; |
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} |
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||
89 |
// Make up the generations |
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90 |
// Calculate the maximum size that a generation can grow. This |
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// includes growth into the other generation. Note that the |
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// parameter _max_gen_size is kept as the maximum |
|
93 |
// size of the generation as the boundaries currently stand. |
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// _max_gen_size is still used as that value. |
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double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0; |
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double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0; |
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_gens = new AdjoiningGenerations(heap_rs, _collector_policy, generation_alignment()); |
1 | 99 |
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_old_gen = _gens->old_gen(); |
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_young_gen = _gens->young_gen(); |
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const size_t eden_capacity = _young_gen->eden_space()->capacity_in_bytes(); |
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const size_t old_capacity = _old_gen->capacity_in_bytes(); |
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105 |
const size_t initial_promo_size = MIN2(eden_capacity, old_capacity); |
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_size_policy = |
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new PSAdaptiveSizePolicy(eden_capacity, |
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initial_promo_size, |
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young_gen()->to_space()->capacity_in_bytes(), |
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_collector_policy->gen_alignment(), |
1 | 111 |
max_gc_pause_sec, |
112 |
max_gc_minor_pause_sec, |
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113 |
GCTimeRatio |
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); |
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115 |
||
116 |
assert(!UseAdaptiveGCBoundary || |
|
117 |
(old_gen()->virtual_space()->high_boundary() == |
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118 |
young_gen()->virtual_space()->low_boundary()), |
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"Boundaries must meet"); |
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120 |
// initialize the policy counters - 2 collectors, 3 generations |
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121 |
_gc_policy_counters = |
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122 |
new PSGCAdaptivePolicyCounters("ParScav:MSC", 2, 3, _size_policy); |
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_psh = this; |
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||
125 |
// Set up the GCTaskManager |
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126 |
_gc_task_manager = GCTaskManager::create(ParallelGCThreads); |
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127 |
||
128 |
if (UseParallelOldGC && !PSParallelCompact::initialize()) { |
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129 |
return JNI_ENOMEM; |
|
130 |
} |
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131 |
||
132 |
return JNI_OK; |
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133 |
} |
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134 |
||
135 |
void ParallelScavengeHeap::post_initialize() { |
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136 |
// Need to init the tenuring threshold |
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137 |
PSScavenge::initialize(); |
|
138 |
if (UseParallelOldGC) { |
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139 |
PSParallelCompact::post_initialize(); |
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140 |
} else { |
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141 |
PSMarkSweep::initialize(); |
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142 |
} |
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143 |
PSPromotionManager::initialize(); |
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144 |
} |
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145 |
||
146 |
void ParallelScavengeHeap::update_counters() { |
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147 |
young_gen()->update_counters(); |
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148 |
old_gen()->update_counters(); |
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MetaspaceCounters::update_performance_counters(); |
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CompressedClassSpaceCounters::update_performance_counters(); |
1 | 151 |
} |
152 |
||
153 |
size_t ParallelScavengeHeap::capacity() const { |
|
154 |
size_t value = young_gen()->capacity_in_bytes() + old_gen()->capacity_in_bytes(); |
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155 |
return value; |
|
156 |
} |
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157 |
||
158 |
size_t ParallelScavengeHeap::used() const { |
|
159 |
size_t value = young_gen()->used_in_bytes() + old_gen()->used_in_bytes(); |
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160 |
return value; |
|
161 |
} |
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162 |
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163 |
bool ParallelScavengeHeap::is_maximal_no_gc() const { |
|
164 |
return old_gen()->is_maximal_no_gc() && young_gen()->is_maximal_no_gc(); |
|
165 |
} |
|
166 |
||
167 |
||
168 |
size_t ParallelScavengeHeap::max_capacity() const { |
|
169 |
size_t estimated = reserved_region().byte_size(); |
|
170 |
if (UseAdaptiveSizePolicy) { |
|
171 |
estimated -= _size_policy->max_survivor_size(young_gen()->max_size()); |
|
172 |
} else { |
|
173 |
estimated -= young_gen()->to_space()->capacity_in_bytes(); |
|
174 |
} |
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175 |
return MAX2(estimated, capacity()); |
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176 |
} |
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177 |
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178 |
bool ParallelScavengeHeap::is_in(const void* p) const { |
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179 |
if (young_gen()->is_in(p)) { |
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180 |
return true; |
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181 |
} |
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182 |
||
183 |
if (old_gen()->is_in(p)) { |
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184 |
return true; |
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185 |
} |
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186 |
||
187 |
return false; |
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188 |
} |
|
189 |
||
190 |
bool ParallelScavengeHeap::is_in_reserved(const void* p) const { |
|
191 |
if (young_gen()->is_in_reserved(p)) { |
|
192 |
return true; |
|
193 |
} |
|
194 |
||
195 |
if (old_gen()->is_in_reserved(p)) { |
|
196 |
return true; |
|
197 |
} |
|
198 |
||
199 |
return false; |
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200 |
} |
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201 |
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bool ParallelScavengeHeap::is_scavengable(const void* addr) { |
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return is_in_young((oop)addr); |
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} |
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|
1 | 206 |
// There are two levels of allocation policy here. |
207 |
// |
|
208 |
// When an allocation request fails, the requesting thread must invoke a VM |
|
209 |
// operation, transfer control to the VM thread, and await the results of a |
|
210 |
// garbage collection. That is quite expensive, and we should avoid doing it |
|
211 |
// multiple times if possible. |
|
212 |
// |
|
213 |
// To accomplish this, we have a basic allocation policy, and also a |
|
214 |
// failed allocation policy. |
|
215 |
// |
|
216 |
// The basic allocation policy controls how you allocate memory without |
|
217 |
// attempting garbage collection. It is okay to grab locks and |
|
218 |
// expand the heap, if that can be done without coming to a safepoint. |
|
219 |
// It is likely that the basic allocation policy will not be very |
|
220 |
// aggressive. |
|
221 |
// |
|
222 |
// The failed allocation policy is invoked from the VM thread after |
|
223 |
// the basic allocation policy is unable to satisfy a mem_allocate |
|
224 |
// request. This policy needs to cover the entire range of collection, |
|
225 |
// heap expansion, and out-of-memory conditions. It should make every |
|
226 |
// attempt to allocate the requested memory. |
|
227 |
||
228 |
// Basic allocation policy. Should never be called at a safepoint, or |
|
229 |
// from the VM thread. |
|
230 |
// |
|
231 |
// This method must handle cases where many mem_allocate requests fail |
|
232 |
// simultaneously. When that happens, only one VM operation will succeed, |
|
233 |
// and the rest will not be executed. For that reason, this method loops |
|
234 |
// during failed allocation attempts. If the java heap becomes exhausted, |
|
235 |
// we rely on the size_policy object to force a bail out. |
|
236 |
HeapWord* ParallelScavengeHeap::mem_allocate( |
|
237 |
size_t size, |
|
238 |
bool* gc_overhead_limit_was_exceeded) { |
|
239 |
assert(!SafepointSynchronize::is_at_safepoint(), "should not be at safepoint"); |
|
240 |
assert(Thread::current() != (Thread*)VMThread::vm_thread(), "should not be in vm thread"); |
|
241 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
242 |
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// In general gc_overhead_limit_was_exceeded should be false so |
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// set it so here and reset it to true only if the gc time |
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// limit is being exceeded as checked below. |
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*gc_overhead_limit_was_exceeded = false; |
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|
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HeapWord* result = young_gen()->allocate(size); |
1 | 249 |
|
250 |
uint loop_count = 0; |
|
251 |
uint gc_count = 0; |
|
29078 | 252 |
uint gclocker_stalled_count = 0; |
1 | 253 |
|
254 |
while (result == NULL) { |
|
255 |
// We don't want to have multiple collections for a single filled generation. |
|
256 |
// To prevent this, each thread tracks the total_collections() value, and if |
|
257 |
// the count has changed, does not do a new collection. |
|
258 |
// |
|
259 |
// The collection count must be read only while holding the heap lock. VM |
|
260 |
// operations also hold the heap lock during collections. There is a lock |
|
261 |
// contention case where thread A blocks waiting on the Heap_lock, while |
|
262 |
// thread B is holding it doing a collection. When thread A gets the lock, |
|
263 |
// the collection count has already changed. To prevent duplicate collections, |
|
264 |
// The policy MUST attempt allocations during the same period it reads the |
|
265 |
// total_collections() value! |
|
266 |
{ |
|
267 |
MutexLocker ml(Heap_lock); |
|
268 |
gc_count = Universe::heap()->total_collections(); |
|
269 |
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270 |
result = young_gen()->allocate(size); |
1 | 271 |
if (result != NULL) { |
272 |
return result; |
|
273 |
} |
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275 |
// If certain conditions hold, try allocating from the old gen. |
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276 |
result = mem_allocate_old_gen(size); |
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if (result != NULL) { |
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278 |
return result; |
1 | 279 |
} |
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|
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if (gclocker_stalled_count > GCLockerRetryAllocationCount) { |
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return NULL; |
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283 |
} |
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284 |
|
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285 |
// Failed to allocate without a gc. |
1 | 286 |
if (GC_locker::is_active_and_needs_gc()) { |
287 |
// If this thread is not in a jni critical section, we stall |
|
288 |
// the requestor until the critical section has cleared and |
|
289 |
// GC allowed. When the critical section clears, a GC is |
|
290 |
// initiated by the last thread exiting the critical section; so |
|
291 |
// we retry the allocation sequence from the beginning of the loop, |
|
292 |
// rather than causing more, now probably unnecessary, GC attempts. |
|
293 |
JavaThread* jthr = JavaThread::current(); |
|
294 |
if (!jthr->in_critical()) { |
|
295 |
MutexUnlocker mul(Heap_lock); |
|
296 |
GC_locker::stall_until_clear(); |
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|
297 |
gclocker_stalled_count += 1; |
1 | 298 |
continue; |
299 |
} else { |
|
300 |
if (CheckJNICalls) { |
|
301 |
fatal("Possible deadlock due to allocating while" |
|
302 |
" in jni critical section"); |
|
303 |
} |
|
304 |
return NULL; |
|
305 |
} |
|
306 |
} |
|
307 |
} |
|
308 |
||
309 |
if (result == NULL) { |
|
310 |
// Generate a VM operation |
|
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|
311 |
VM_ParallelGCFailedAllocation op(size, gc_count); |
1 | 312 |
VMThread::execute(&op); |
313 |
||
314 |
// Did the VM operation execute? If so, return the result directly. |
|
315 |
// This prevents us from looping until time out on requests that can |
|
316 |
// not be satisfied. |
|
317 |
if (op.prologue_succeeded()) { |
|
318 |
assert(Universe::heap()->is_in_or_null(op.result()), |
|
319 |
"result not in heap"); |
|
320 |
||
321 |
// If GC was locked out during VM operation then retry allocation |
|
322 |
// and/or stall as necessary. |
|
323 |
if (op.gc_locked()) { |
|
324 |
assert(op.result() == NULL, "must be NULL if gc_locked() is true"); |
|
325 |
continue; // retry and/or stall as necessary |
|
326 |
} |
|
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|
327 |
|
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|
328 |
// Exit the loop if the gc time limit has been exceeded. |
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|
329 |
// The allocation must have failed above ("result" guarding |
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|
330 |
// this path is NULL) and the most recent collection has exceeded the |
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|
331 |
// gc overhead limit (although enough may have been collected to |
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|
332 |
// satisfy the allocation). Exit the loop so that an out-of-memory |
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|
333 |
// will be thrown (return a NULL ignoring the contents of |
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|
334 |
// op.result()), |
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|
335 |
// but clear gc_overhead_limit_exceeded so that the next collection |
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|
336 |
// starts with a clean slate (i.e., forgets about previous overhead |
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|
337 |
// excesses). Fill op.result() with a filler object so that the |
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|
338 |
// heap remains parsable. |
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|
339 |
const bool limit_exceeded = size_policy()->gc_overhead_limit_exceeded(); |
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|
340 |
const bool softrefs_clear = collector_policy()->all_soft_refs_clear(); |
15959
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|
341 |
|
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|
342 |
if (limit_exceeded && softrefs_clear) { |
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|
343 |
*gc_overhead_limit_was_exceeded = true; |
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|
344 |
size_policy()->set_gc_overhead_limit_exceeded(false); |
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|
345 |
if (PrintGCDetails && Verbose) { |
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|
346 |
gclog_or_tty->print_cr("ParallelScavengeHeap::mem_allocate: " |
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|
347 |
"return NULL because gc_overhead_limit_exceeded is set"); |
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|
348 |
} |
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|
349 |
if (op.result() != NULL) { |
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|
350 |
CollectedHeap::fill_with_object(op.result(), size); |
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|
351 |
} |
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|
352 |
return NULL; |
1 | 353 |
} |
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|
354 |
|
1 | 355 |
return op.result(); |
356 |
} |
|
357 |
} |
|
358 |
||
359 |
// The policy object will prevent us from looping forever. If the |
|
360 |
// time spent in gc crosses a threshold, we will bail out. |
|
361 |
loop_count++; |
|
362 |
if ((result == NULL) && (QueuedAllocationWarningCount > 0) && |
|
363 |
(loop_count % QueuedAllocationWarningCount == 0)) { |
|
364 |
warning("ParallelScavengeHeap::mem_allocate retries %d times \n\t" |
|
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
23470
diff
changeset
|
365 |
" size=" SIZE_FORMAT, loop_count, size); |
1 | 366 |
} |
367 |
} |
|
368 |
||
369 |
return result; |
|
370 |
} |
|
371 |
||
11758
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|
372 |
// A "death march" is a series of ultra-slow allocations in which a full gc is |
b1a0089f89d2
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|
373 |
// done before each allocation, and after the full gc the allocation still |
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|
374 |
// cannot be satisfied from the young gen. This routine detects that condition; |
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|
375 |
// it should be called after a full gc has been done and the allocation |
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|
376 |
// attempted from the young gen. The parameter 'addr' should be the result of |
b1a0089f89d2
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|
377 |
// that young gen allocation attempt. |
b1a0089f89d2
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|
378 |
void |
b1a0089f89d2
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|
379 |
ParallelScavengeHeap::death_march_check(HeapWord* const addr, size_t size) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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|
380 |
if (addr != NULL) { |
b1a0089f89d2
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|
381 |
_death_march_count = 0; // death march has ended |
b1a0089f89d2
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|
382 |
} else if (_death_march_count == 0) { |
b1a0089f89d2
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|
383 |
if (should_alloc_in_eden(size)) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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|
384 |
_death_march_count = 1; // death march has started |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
385 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
386 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
387 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
388 |
|
b1a0089f89d2
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changeset
|
389 |
HeapWord* ParallelScavengeHeap::mem_allocate_old_gen(size_t size) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
390 |
if (!should_alloc_in_eden(size) || GC_locker::is_active_and_needs_gc()) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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|
391 |
// Size is too big for eden, or gc is locked out. |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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|
392 |
return old_gen()->allocate(size); |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
393 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
394 |
|
b1a0089f89d2
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changeset
|
395 |
// If a "death march" is in progress, allocate from the old gen a limited |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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|
396 |
// number of times before doing a GC. |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
397 |
if (_death_march_count > 0) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
398 |
if (_death_march_count < 64) { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
399 |
++_death_march_count; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
400 |
return old_gen()->allocate(size); |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
401 |
} else { |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
402 |
_death_march_count = 0; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
jcoomes
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diff
changeset
|
403 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
404 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
405 |
return NULL; |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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diff
changeset
|
406 |
} |
b1a0089f89d2
6330863: vm/gc/InfiniteList.java fails intermittently due to timeout
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changeset
|
407 |
|
13728
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coleenp
parents:
13195
diff
changeset
|
408 |
void ParallelScavengeHeap::do_full_collection(bool clear_all_soft_refs) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
409 |
if (UseParallelOldGC) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
410 |
// The do_full_collection() parameter clear_all_soft_refs |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
411 |
// is interpreted here as maximum_compaction which will |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
412 |
// cause SoftRefs to be cleared. |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
413 |
bool maximum_compaction = clear_all_soft_refs; |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
414 |
PSParallelCompact::invoke(maximum_compaction); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
415 |
} else { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
416 |
PSMarkSweep::invoke(clear_all_soft_refs); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
417 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
418 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
419 |
|
1 | 420 |
// Failed allocation policy. Must be called from the VM thread, and |
421 |
// only at a safepoint! Note that this method has policy for allocation |
|
422 |
// flow, and NOT collection policy. So we do not check for gc collection |
|
423 |
// time over limit here, that is the responsibility of the heap specific |
|
424 |
// collection methods. This method decides where to attempt allocations, |
|
425 |
// and when to attempt collections, but no collection specific policy. |
|
9997
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tonyp
parents:
9995
diff
changeset
|
426 |
HeapWord* ParallelScavengeHeap::failed_mem_allocate(size_t size) { |
1 | 427 |
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint"); |
428 |
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread"); |
|
429 |
assert(!Universe::heap()->is_gc_active(), "not reentrant"); |
|
430 |
assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
431 |
||
11758
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|
432 |
// We assume that allocation in eden will fail unless we collect. |
1 | 433 |
|
434 |
// First level allocation failure, scavenge and allocate in young gen. |
|
435 |
GCCauseSetter gccs(this, GCCause::_allocation_failure); |
|
11758
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|
436 |
const bool invoked_full_gc = PSScavenge::invoke(); |
9997
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tonyp
parents:
9995
diff
changeset
|
437 |
HeapWord* result = young_gen()->allocate(size); |
1 | 438 |
|
439 |
// Second level allocation failure. |
|
440 |
// Mark sweep and allocate in young generation. |
|
11758
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|
441 |
if (result == NULL && !invoked_full_gc) { |
13728
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changeset
|
442 |
do_full_collection(false); |
11758
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|
443 |
result = young_gen()->allocate(size); |
1 | 444 |
} |
445 |
||
11758
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|
446 |
death_march_check(result, size); |
b1a0089f89d2
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|
447 |
|
1 | 448 |
// Third level allocation failure. |
449 |
// After mark sweep and young generation allocation failure, |
|
450 |
// allocate in old generation. |
|
9997
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tonyp
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diff
changeset
|
451 |
if (result == NULL) { |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
452 |
result = old_gen()->allocate(size); |
1 | 453 |
} |
454 |
||
455 |
// Fourth level allocation failure. We're running out of memory. |
|
456 |
// More complete mark sweep and allocate in young generation. |
|
457 |
if (result == NULL) { |
|
13728
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changeset
|
458 |
do_full_collection(true); |
9997
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diff
changeset
|
459 |
result = young_gen()->allocate(size); |
1 | 460 |
} |
461 |
||
462 |
// Fifth level allocation failure. |
|
463 |
// After more complete mark sweep, allocate in old generation. |
|
9997
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changeset
|
464 |
if (result == NULL) { |
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
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diff
changeset
|
465 |
result = old_gen()->allocate(size); |
1 | 466 |
} |
467 |
||
468 |
return result; |
|
469 |
} |
|
470 |
||
471 |
void ParallelScavengeHeap::ensure_parsability(bool retire_tlabs) { |
|
472 |
CollectedHeap::ensure_parsability(retire_tlabs); |
|
473 |
young_gen()->eden_space()->ensure_parsability(); |
|
474 |
} |
|
475 |
||
476 |
size_t ParallelScavengeHeap::tlab_capacity(Thread* thr) const { |
|
477 |
return young_gen()->eden_space()->tlab_capacity(thr); |
|
478 |
} |
|
479 |
||
22552 | 480 |
size_t ParallelScavengeHeap::tlab_used(Thread* thr) const { |
481 |
return young_gen()->eden_space()->tlab_used(thr); |
|
482 |
} |
|
483 |
||
1 | 484 |
size_t ParallelScavengeHeap::unsafe_max_tlab_alloc(Thread* thr) const { |
485 |
return young_gen()->eden_space()->unsafe_max_tlab_alloc(thr); |
|
486 |
} |
|
487 |
||
488 |
HeapWord* ParallelScavengeHeap::allocate_new_tlab(size_t size) { |
|
9997
b75b7939f448
6994322: Remove the is_tlab and is_noref / is_large_noref parameters from the CollectedHeap
tonyp
parents:
9995
diff
changeset
|
489 |
return young_gen()->allocate(size); |
1 | 490 |
} |
491 |
||
492 |
void ParallelScavengeHeap::accumulate_statistics_all_tlabs() { |
|
493 |
CollectedHeap::accumulate_statistics_all_tlabs(); |
|
494 |
} |
|
495 |
||
496 |
void ParallelScavengeHeap::resize_all_tlabs() { |
|
497 |
CollectedHeap::resize_all_tlabs(); |
|
498 |
} |
|
499 |
||
4030
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
500 |
bool ParallelScavengeHeap::can_elide_initializing_store_barrier(oop new_obj) { |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
501 |
// We don't need barriers for stores to objects in the |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
502 |
// young gen and, a fortiori, for initializing stores to |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
503 |
// objects therein. |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
504 |
return is_in_young(new_obj); |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
505 |
} |
4c471254865e
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
3908
diff
changeset
|
506 |
|
1 | 507 |
// This method is used by System.gc() and JVMTI. |
508 |
void ParallelScavengeHeap::collect(GCCause::Cause cause) { |
|
509 |
assert(!Heap_lock->owned_by_self(), |
|
510 |
"this thread should not own the Heap_lock"); |
|
511 |
||
29078 | 512 |
uint gc_count = 0; |
513 |
uint full_gc_count = 0; |
|
1 | 514 |
{ |
515 |
MutexLocker ml(Heap_lock); |
|
516 |
// This value is guarded by the Heap_lock |
|
517 |
gc_count = Universe::heap()->total_collections(); |
|
518 |
full_gc_count = Universe::heap()->total_full_collections(); |
|
519 |
} |
|
520 |
||
521 |
VM_ParallelGCSystemGC op(gc_count, full_gc_count, cause); |
|
522 |
VMThread::execute(&op); |
|
523 |
} |
|
524 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
525 |
void ParallelScavengeHeap::oop_iterate(ExtendedOopClosure* cl) { |
1 | 526 |
Unimplemented(); |
527 |
} |
|
528 |
||
529 |
void ParallelScavengeHeap::object_iterate(ObjectClosure* cl) { |
|
530 |
young_gen()->object_iterate(cl); |
|
531 |
old_gen()->object_iterate(cl); |
|
532 |
} |
|
533 |
||
534 |
||
535 |
HeapWord* ParallelScavengeHeap::block_start(const void* addr) const { |
|
536 |
if (young_gen()->is_in_reserved(addr)) { |
|
537 |
assert(young_gen()->is_in(addr), |
|
538 |
"addr should be in allocated part of young gen"); |
|
7108 | 539 |
// called from os::print_location by find or VMError |
540 |
if (Debugging || VMError::fatal_error_in_progress()) return NULL; |
|
1 | 541 |
Unimplemented(); |
542 |
} else if (old_gen()->is_in_reserved(addr)) { |
|
543 |
assert(old_gen()->is_in(addr), |
|
544 |
"addr should be in allocated part of old gen"); |
|
545 |
return old_gen()->start_array()->object_start((HeapWord*)addr); |
|
546 |
} |
|
547 |
return 0; |
|
548 |
} |
|
549 |
||
550 |
size_t ParallelScavengeHeap::block_size(const HeapWord* addr) const { |
|
551 |
return oop(addr)->size(); |
|
552 |
} |
|
553 |
||
554 |
bool ParallelScavengeHeap::block_is_obj(const HeapWord* addr) const { |
|
555 |
return block_start(addr) == addr; |
|
556 |
} |
|
557 |
||
558 |
jlong ParallelScavengeHeap::millis_since_last_gc() { |
|
559 |
return UseParallelOldGC ? |
|
560 |
PSParallelCompact::millis_since_last_gc() : |
|
561 |
PSMarkSweep::millis_since_last_gc(); |
|
562 |
} |
|
563 |
||
564 |
void ParallelScavengeHeap::prepare_for_verify() { |
|
565 |
ensure_parsability(false); // no need to retire TLABs for verification |
|
566 |
} |
|
567 |
||
18025 | 568 |
PSHeapSummary ParallelScavengeHeap::create_ps_heap_summary() { |
569 |
PSOldGen* old = old_gen(); |
|
570 |
HeapWord* old_committed_end = (HeapWord*)old->virtual_space()->committed_high_addr(); |
|
571 |
VirtualSpaceSummary old_summary(old->reserved().start(), old_committed_end, old->reserved().end()); |
|
572 |
SpaceSummary old_space(old->reserved().start(), old_committed_end, old->used_in_bytes()); |
|
573 |
||
574 |
PSYoungGen* young = young_gen(); |
|
575 |
VirtualSpaceSummary young_summary(young->reserved().start(), |
|
576 |
(HeapWord*)young->virtual_space()->committed_high_addr(), young->reserved().end()); |
|
577 |
||
578 |
MutableSpace* eden = young_gen()->eden_space(); |
|
579 |
SpaceSummary eden_space(eden->bottom(), eden->end(), eden->used_in_bytes()); |
|
580 |
||
581 |
MutableSpace* from = young_gen()->from_space(); |
|
582 |
SpaceSummary from_space(from->bottom(), from->end(), from->used_in_bytes()); |
|
583 |
||
584 |
MutableSpace* to = young_gen()->to_space(); |
|
585 |
SpaceSummary to_space(to->bottom(), to->end(), to->used_in_bytes()); |
|
586 |
||
587 |
VirtualSpaceSummary heap_summary = create_heap_space_summary(); |
|
588 |
return PSHeapSummary(heap_summary, used(), old_summary, old_space, young_summary, eden_space, from_space, to_space); |
|
589 |
} |
|
590 |
||
1 | 591 |
void ParallelScavengeHeap::print_on(outputStream* st) const { |
592 |
young_gen()->print_on(st); |
|
593 |
old_gen()->print_on(st); |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13195
diff
changeset
|
594 |
MetaspaceAux::print_on(st); |
1 | 595 |
} |
596 |
||
16685
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
597 |
void ParallelScavengeHeap::print_on_error(outputStream* st) const { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
598 |
this->CollectedHeap::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
599 |
|
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
600 |
if (UseParallelOldGC) { |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
601 |
st->cr(); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
602 |
PSParallelCompact::print_on_error(st); |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
603 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
604 |
} |
41c34debcde0
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
16604
diff
changeset
|
605 |
|
1 | 606 |
void ParallelScavengeHeap::gc_threads_do(ThreadClosure* tc) const { |
607 |
PSScavenge::gc_task_manager()->threads_do(tc); |
|
608 |
} |
|
609 |
||
610 |
void ParallelScavengeHeap::print_gc_threads_on(outputStream* st) const { |
|
611 |
PSScavenge::gc_task_manager()->print_threads_on(st); |
|
612 |
} |
|
613 |
||
614 |
void ParallelScavengeHeap::print_tracing_info() const { |
|
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
615 |
if (TraceYoungGenTime) { |
1 | 616 |
double time = PSScavenge::accumulated_time()->seconds(); |
617 |
tty->print_cr("[Accumulated GC generation 0 time %3.7f secs]", time); |
|
618 |
} |
|
24941
4ebbe176a7b1
8042298: Remove the names gen0 and gen1 from the GC code
jwilhelm
parents:
24424
diff
changeset
|
619 |
if (TraceOldGenTime) { |
16386
e436eb52ae05
6733980: par compact - TraceGen1Time always shows 0.0000 seconds
tschatzl
parents:
15959
diff
changeset
|
620 |
double time = UseParallelOldGC ? PSParallelCompact::accumulated_time()->seconds() : PSMarkSweep::accumulated_time()->seconds(); |
1 | 621 |
tty->print_cr("[Accumulated GC generation 1 time %3.7f secs]", time); |
622 |
} |
|
623 |
} |
|
624 |
||
625 |
||
12379 | 626 |
void ParallelScavengeHeap::verify(bool silent, VerifyOption option /* ignored */) { |
1 | 627 |
// Why do we need the total_collections()-filter below? |
628 |
if (total_collections() > 0) { |
|
629 |
if (!silent) { |
|
630 |
gclog_or_tty->print("tenured "); |
|
631 |
} |
|
12379 | 632 |
old_gen()->verify(); |
1 | 633 |
|
634 |
if (!silent) { |
|
635 |
gclog_or_tty->print("eden "); |
|
636 |
} |
|
12379 | 637 |
young_gen()->verify(); |
1 | 638 |
} |
639 |
} |
|
640 |
||
641 |
void ParallelScavengeHeap::print_heap_change(size_t prev_used) { |
|
642 |
if (PrintGCDetails && Verbose) { |
|
643 |
gclog_or_tty->print(" " SIZE_FORMAT |
|
644 |
"->" SIZE_FORMAT |
|
645 |
"(" SIZE_FORMAT ")", |
|
646 |
prev_used, used(), capacity()); |
|
647 |
} else { |
|
648 |
gclog_or_tty->print(" " SIZE_FORMAT "K" |
|
649 |
"->" SIZE_FORMAT "K" |
|
650 |
"(" SIZE_FORMAT "K)", |
|
651 |
prev_used / K, used() / K, capacity() / K); |
|
652 |
} |
|
653 |
} |
|
654 |
||
28940
c314cf1db3fa
8066566: Refactor ParNewGeneration to contain ParNewTracer
mlarsson
parents:
27687
diff
changeset
|
655 |
void ParallelScavengeHeap::trace_heap(GCWhen::Type when, const GCTracer* gc_tracer) { |
18025 | 656 |
const PSHeapSummary& heap_summary = create_ps_heap_summary(); |
23470
ff2a7ea4225d
8036703: Add trace event with statistics for the metaspace chunk free lists
ehelin
parents:
22552
diff
changeset
|
657 |
gc_tracer->report_gc_heap_summary(when, heap_summary); |
ff2a7ea4225d
8036703: Add trace event with statistics for the metaspace chunk free lists
ehelin
parents:
22552
diff
changeset
|
658 |
|
18025 | 659 |
const MetaspaceSummary& metaspace_summary = create_metaspace_summary(); |
23470
ff2a7ea4225d
8036703: Add trace event with statistics for the metaspace chunk free lists
ehelin
parents:
22552
diff
changeset
|
660 |
gc_tracer->report_metaspace_summary(when, metaspace_summary); |
18025 | 661 |
} |
662 |
||
1 | 663 |
ParallelScavengeHeap* ParallelScavengeHeap::heap() { |
664 |
assert(_psh != NULL, "Uninitialized access to ParallelScavengeHeap::heap()"); |
|
665 |
assert(_psh->kind() == CollectedHeap::ParallelScavengeHeap, "not a parallel scavenge heap"); |
|
666 |
return _psh; |
|
667 |
} |
|
668 |
||
669 |
// Before delegating the resize to the young generation, |
|
670 |
// the reserved space for the young and old generations |
|
22551 | 671 |
// may be changed to accommodate the desired resize. |
1 | 672 |
void ParallelScavengeHeap::resize_young_gen(size_t eden_size, |
673 |
size_t survivor_size) { |
|
674 |
if (UseAdaptiveGCBoundary) { |
|
675 |
if (size_policy()->bytes_absorbed_from_eden() != 0) { |
|
676 |
size_policy()->reset_bytes_absorbed_from_eden(); |
|
677 |
return; // The generation changed size already. |
|
678 |
} |
|
679 |
gens()->adjust_boundary_for_young_gen_needs(eden_size, survivor_size); |
|
680 |
} |
|
681 |
||
682 |
// Delegate the resize to the generation. |
|
683 |
_young_gen->resize(eden_size, survivor_size); |
|
684 |
} |
|
685 |
||
686 |
// Before delegating the resize to the old generation, |
|
687 |
// the reserved space for the young and old generations |
|
22551 | 688 |
// may be changed to accommodate the desired resize. |
1 | 689 |
void ParallelScavengeHeap::resize_old_gen(size_t desired_free_space) { |
690 |
if (UseAdaptiveGCBoundary) { |
|
691 |
if (size_policy()->bytes_absorbed_from_eden() != 0) { |
|
692 |
size_policy()->reset_bytes_absorbed_from_eden(); |
|
693 |
return; // The generation changed size already. |
|
694 |
} |
|
695 |
gens()->adjust_boundary_for_old_gen_needs(desired_free_space); |
|
696 |
} |
|
697 |
||
698 |
// Delegate the resize to the generation. |
|
699 |
_old_gen->resize(desired_free_space); |
|
700 |
} |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
701 |
|
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
702 |
ParallelScavengeHeap::ParStrongRootsScope::ParStrongRootsScope() { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
703 |
// nothing particular |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
704 |
} |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
705 |
|
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
706 |
ParallelScavengeHeap::ParStrongRootsScope::~ParStrongRootsScope() { |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
707 |
// nothing particular |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
708 |
} |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
3262
diff
changeset
|
709 |
|
971
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
710 |
#ifndef PRODUCT |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
711 |
void ParallelScavengeHeap::record_gen_tops_before_GC() { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
712 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
713 |
young_gen()->record_spaces_top(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
714 |
old_gen()->record_spaces_top(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
715 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
716 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
717 |
|
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
718 |
void ParallelScavengeHeap::gen_mangle_unused_area() { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
719 |
if (ZapUnusedHeapArea) { |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
720 |
young_gen()->eden_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
721 |
young_gen()->to_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
722 |
young_gen()->from_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
723 |
old_gen()->object_space()->mangle_unused_area(); |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
724 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
725 |
} |
f0b20be4165d
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
386
diff
changeset
|
726 |
#endif |