graal-compiler: src/share/vm/memory/collectorPolicy.hpp annotate

annotate src/share/vm/memory/collectorPolicy.hpp @ 6725:da91efe96a93

6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>

author	coleenp
date	Sat, 01 Sep 2012 13:25:18 -0400
parents	d2a62e0f25eb
children	db9981fd3124 95ccff9eee8e

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2 * Copyright (c) 2001, 2012, 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: 1552 diff changeset	25 #ifndef SHARE_VM_MEMORY_COLLECTORPOLICY_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	26 #define SHARE_VM_MEMORY_COLLECTORPOLICY_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	27
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	28 #include "memory/allocation.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	29 #include "memory/barrierSet.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	30 #include "memory/generationSpec.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	31 #include "memory/genRemSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	32
0 a61af66fc99e Initial load duke parents: diff changeset	33 // This class (or more correctly, subtypes of this class)
a61af66fc99e Initial load duke parents: diff changeset	34 // are used to define global garbage collector attributes.
a61af66fc99e Initial load duke parents: diff changeset	35 // This includes initialization of generations and any other
a61af66fc99e Initial load duke parents: diff changeset	36 // shared resources they may need.
a61af66fc99e Initial load duke parents: diff changeset	37 //
a61af66fc99e Initial load duke parents: diff changeset	38 // In general, all flag adjustment and validation should be
a61af66fc99e Initial load duke parents: diff changeset	39 // done in initialize_flags(), which is called prior to
a61af66fc99e Initial load duke parents: diff changeset	40 // initialize_size_info().
a61af66fc99e Initial load duke parents: diff changeset	41 //
a61af66fc99e Initial load duke parents: diff changeset	42 // This class is not fully developed yet. As more collector(s)
a61af66fc99e Initial load duke parents: diff changeset	43 // are added, it is expected that we will come across further
a61af66fc99e Initial load duke parents: diff changeset	44 // behavior that requires global attention. The correct place
a61af66fc99e Initial load duke parents: diff changeset	45 // to deal with those issues is this class.
a61af66fc99e Initial load duke parents: diff changeset	46
a61af66fc99e Initial load duke parents: diff changeset	47 // Forward declarations.
a61af66fc99e Initial load duke parents: diff changeset	48 class GenCollectorPolicy;
a61af66fc99e Initial load duke parents: diff changeset	49 class TwoGenerationCollectorPolicy;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	50 class AdaptiveSizePolicy;
0 a61af66fc99e Initial load duke parents: diff changeset	51 #ifndef SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	52 class ConcurrentMarkSweepPolicy;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	53 class G1CollectorPolicy;
0 a61af66fc99e Initial load duke parents: diff changeset	54 #endif // SERIALGC
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	55
0 a61af66fc99e Initial load duke parents: diff changeset	56 class GCPolicyCounters;
a61af66fc99e Initial load duke parents: diff changeset	57 class MarkSweepPolicy;
a61af66fc99e Initial load duke parents: diff changeset	58
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 3774 diff changeset	59 class CollectorPolicy : public CHeapObj<mtGC> {
0 a61af66fc99e Initial load duke parents: diff changeset	60 protected:
a61af66fc99e Initial load duke parents: diff changeset	61 GCPolicyCounters* _gc_policy_counters;
a61af66fc99e Initial load duke parents: diff changeset	62
a61af66fc99e Initial load duke parents: diff changeset	63 // Requires that the concrete subclass sets the alignment constraints
a61af66fc99e Initial load duke parents: diff changeset	64 // before calling.
a61af66fc99e Initial load duke parents: diff changeset	65 virtual void initialize_flags();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	66 virtual void initialize_size_info();
0 a61af66fc99e Initial load duke parents: diff changeset	67
a61af66fc99e Initial load duke parents: diff changeset	68 size_t _initial_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	69 size_t _max_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	70 size_t _min_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	71
a61af66fc99e Initial load duke parents: diff changeset	72 size_t _min_alignment;
a61af66fc99e Initial load duke parents: diff changeset	73 size_t _max_alignment;
a61af66fc99e Initial load duke parents: diff changeset	74
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	75 // The sizing of the heap are controlled by a sizing policy.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	76 AdaptiveSizePolicy* _size_policy;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	77
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	78 // Set to true when policy wants soft refs cleared.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	79 // Reset to false by gc after it clears all soft refs.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	80 bool _should_clear_all_soft_refs;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	81 // Set to true by the GC if the just-completed gc cleared all
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	82 // softrefs. This is set to true whenever a gc clears all softrefs, and
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	83 // set to false each time gc returns to the mutator. For example, in the
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	84 // ParallelScavengeHeap case the latter would be done toward the end of
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	85 // mem_allocate() where it returns op.result()
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	86 bool _all_soft_refs_clear;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	87
0 a61af66fc99e Initial load duke parents: diff changeset	88 CollectorPolicy() :
a61af66fc99e Initial load duke parents: diff changeset	89 _min_alignment(1),
a61af66fc99e Initial load duke parents: diff changeset	90 _max_alignment(1),
a61af66fc99e Initial load duke parents: diff changeset	91 _initial_heap_byte_size(0),
a61af66fc99e Initial load duke parents: diff changeset	92 _max_heap_byte_size(0),
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	93 _min_heap_byte_size(0),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	94 _size_policy(NULL),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	95 _should_clear_all_soft_refs(false),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	96 _all_soft_refs_clear(false)
0 a61af66fc99e Initial load duke parents: diff changeset	97 {}
a61af66fc99e Initial load duke parents: diff changeset	98
a61af66fc99e Initial load duke parents: diff changeset	99 public:
a61af66fc99e Initial load duke parents: diff changeset	100 void set_min_alignment(size_t align) { _min_alignment = align; }
a61af66fc99e Initial load duke parents: diff changeset	101 size_t min_alignment() { return _min_alignment; }
a61af66fc99e Initial load duke parents: diff changeset	102 void set_max_alignment(size_t align) { _max_alignment = align; }
a61af66fc99e Initial load duke parents: diff changeset	103 size_t max_alignment() { return _max_alignment; }
a61af66fc99e Initial load duke parents: diff changeset	104
a61af66fc99e Initial load duke parents: diff changeset	105 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	106 void set_initial_heap_byte_size(size_t v) { _initial_heap_byte_size = v; }
0 a61af66fc99e Initial load duke parents: diff changeset	107 size_t max_heap_byte_size() { return _max_heap_byte_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	108 void set_max_heap_byte_size(size_t v) { _max_heap_byte_size = v; }
0 a61af66fc99e Initial load duke parents: diff changeset	109 size_t min_heap_byte_size() { return _min_heap_byte_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	110 void set_min_heap_byte_size(size_t v) { _min_heap_byte_size = v; }
0 a61af66fc99e Initial load duke parents: diff changeset	111
a61af66fc99e Initial load duke parents: diff changeset	112 enum Name {
a61af66fc99e Initial load duke parents: diff changeset	113 CollectorPolicyKind,
a61af66fc99e Initial load duke parents: diff changeset	114 TwoGenerationCollectorPolicyKind,
a61af66fc99e Initial load duke parents: diff changeset	115 ConcurrentMarkSweepPolicyKind,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	116 ASConcurrentMarkSweepPolicyKind,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	117 G1CollectorPolicyKind
0 a61af66fc99e Initial load duke parents: diff changeset	118 };
a61af66fc99e Initial load duke parents: diff changeset	119
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	120 AdaptiveSizePolicy* size_policy() { return _size_policy; }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	121 bool should_clear_all_soft_refs() { return _should_clear_all_soft_refs; }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	122 void set_should_clear_all_soft_refs(bool v) { _should_clear_all_soft_refs = v; }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	123 // Returns the current value of _should_clear_all_soft_refs.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	124 // _should_clear_all_soft_refs is set to false as a side effect.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	125 bool use_should_clear_all_soft_refs(bool v);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	126 bool all_soft_refs_clear() { return _all_soft_refs_clear; }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	127 void set_all_soft_refs_clear(bool v) { _all_soft_refs_clear = v; }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	128
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	129 // Called by the GC after Soft Refs have been cleared to indicate
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	130 // that the request in _should_clear_all_soft_refs has been fulfilled.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	131 void cleared_all_soft_refs();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	132
0 a61af66fc99e Initial load duke parents: diff changeset	133 // Identification methods.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	134 virtual GenCollectorPolicy* as_generation_policy() { return NULL; }
0 a61af66fc99e Initial load duke parents: diff changeset	135 virtual TwoGenerationCollectorPolicy* as_two_generation_policy() { return NULL; }
a61af66fc99e Initial load duke parents: diff changeset	136 virtual MarkSweepPolicy* as_mark_sweep_policy() { return NULL; }
a61af66fc99e Initial load duke parents: diff changeset	137 #ifndef SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	138 virtual ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return NULL; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	139 virtual G1CollectorPolicy* as_g1_policy() { return NULL; }
0 a61af66fc99e Initial load duke parents: diff changeset	140 #endif // SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	141 // Note that these are not virtual.
a61af66fc99e Initial load duke parents: diff changeset	142 bool is_generation_policy() { return as_generation_policy() != NULL; }
a61af66fc99e Initial load duke parents: diff changeset	143 bool is_two_generation_policy() { return as_two_generation_policy() != NULL; }
a61af66fc99e Initial load duke parents: diff changeset	144 bool is_mark_sweep_policy() { return as_mark_sweep_policy() != NULL; }
a61af66fc99e Initial load duke parents: diff changeset	145 #ifndef SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	146 bool is_concurrent_mark_sweep_policy() { return as_concurrent_mark_sweep_policy() != NULL; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	147 bool is_g1_policy() { return as_g1_policy() != NULL; }
0 a61af66fc99e Initial load duke parents: diff changeset	148 #else // SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	149 bool is_concurrent_mark_sweep_policy() { return false; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	150 bool is_g1_policy() { return false; }
0 a61af66fc99e Initial load duke parents: diff changeset	151 #endif // SERIALGC
a61af66fc99e Initial load duke parents: diff changeset	152
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	153
0 a61af66fc99e Initial load duke parents: diff changeset	154 virtual BarrierSet::Name barrier_set_name() = 0;
a61af66fc99e Initial load duke parents: diff changeset	155 virtual GenRemSet::Name rem_set_name() = 0;
a61af66fc99e Initial load duke parents: diff changeset	156
a61af66fc99e Initial load duke parents: diff changeset	157 // Create the remembered set (to cover the given reserved region,
a61af66fc99e Initial load duke parents: diff changeset	158 // allowing breaking up into at most "max_covered_regions").
a61af66fc99e Initial load duke parents: diff changeset	159 virtual GenRemSet* create_rem_set(MemRegion reserved,
a61af66fc99e Initial load duke parents: diff changeset	160 int max_covered_regions);
a61af66fc99e Initial load duke parents: diff changeset	161
a61af66fc99e Initial load duke parents: diff changeset	162 // This method controls how a collector satisfies a request
a61af66fc99e Initial load duke parents: diff changeset	163 // for a block of memory. "gc_time_limit_was_exceeded" will
a61af66fc99e Initial load duke parents: diff changeset	164 // be set to true if the adaptive size policy determine that
a61af66fc99e Initial load duke parents: diff changeset	165 // an excessive amount of time is being spent doing collections
a61af66fc99e Initial load duke parents: diff changeset	166 // and caused a NULL to be returned. If a NULL is not returned,
a61af66fc99e Initial load duke parents: diff changeset	167 // "gc_time_limit_was_exceeded" has an undefined meaning.
a61af66fc99e Initial load duke parents: diff changeset	168 virtual HeapWord* mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	169 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	170 bool* gc_overhead_limit_was_exceeded) = 0;
a61af66fc99e Initial load duke parents: diff changeset	171
a61af66fc99e Initial load duke parents: diff changeset	172 // This method controls how a collector handles one or more
a61af66fc99e Initial load duke parents: diff changeset	173 // of its generations being fully allocated.
a61af66fc99e Initial load duke parents: diff changeset	174 virtual HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab) = 0;
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	175 // This method controls how a collector handles a metadata allocation
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	176 // failure.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	177 virtual MetaWord* satisfy_failed_metadata_allocation(ClassLoaderData* loader_data,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	178 size_t size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	179 Metaspace::MetadataType mdtype);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	180
0 a61af66fc99e Initial load duke parents: diff changeset	181 // Performace Counter support
a61af66fc99e Initial load duke parents: diff changeset	182 GCPolicyCounters* counters() { return _gc_policy_counters; }
a61af66fc99e Initial load duke parents: diff changeset	183
a61af66fc99e Initial load duke parents: diff changeset	184 // Create the jstat counters for the GC policy. By default, policy's
a61af66fc99e Initial load duke parents: diff changeset	185 // don't have associated counters, and we complain if this is invoked.
a61af66fc99e Initial load duke parents: diff changeset	186 virtual void initialize_gc_policy_counters() {
a61af66fc99e Initial load duke parents: diff changeset	187 ShouldNotReachHere();
a61af66fc99e Initial load duke parents: diff changeset	188 }
a61af66fc99e Initial load duke parents: diff changeset	189
a61af66fc99e Initial load duke parents: diff changeset	190 virtual CollectorPolicy::Name kind() {
a61af66fc99e Initial load duke parents: diff changeset	191 return CollectorPolicy::CollectorPolicyKind;
a61af66fc99e Initial load duke parents: diff changeset	192 }
a61af66fc99e Initial load duke parents: diff changeset	193
a61af66fc99e Initial load duke parents: diff changeset	194 // Returns true if a collector has eden space with soft end.
a61af66fc99e Initial load duke parents: diff changeset	195 virtual bool has_soft_ended_eden() {
a61af66fc99e Initial load duke parents: diff changeset	196 return false;
a61af66fc99e Initial load duke parents: diff changeset	197 }
a61af66fc99e Initial load duke parents: diff changeset	198
a61af66fc99e Initial load duke parents: diff changeset	199 };
a61af66fc99e Initial load duke parents: diff changeset	200
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	201 class ClearedAllSoftRefs : public StackObj {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	202 bool _clear_all_soft_refs;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	203 CollectorPolicy* _collector_policy;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	204 public:
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	205 ClearedAllSoftRefs(bool clear_all_soft_refs,
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	206 CollectorPolicy* collector_policy) :
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	207 _clear_all_soft_refs(clear_all_soft_refs),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	208 _collector_policy(collector_policy) {}
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	209
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	210 ~ClearedAllSoftRefs() {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	211 if (_clear_all_soft_refs) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	212 _collector_policy->cleared_all_soft_refs();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	213 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	214 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	215 };
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	216
0 a61af66fc99e Initial load duke parents: diff changeset	217 class GenCollectorPolicy : public CollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	218 protected:
a61af66fc99e Initial load duke parents: diff changeset	219 size_t _min_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	220 size_t _initial_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	221 size_t _max_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	222
a61af66fc99e Initial load duke parents: diff changeset	223 GenerationSpec **_generations;
a61af66fc99e Initial load duke parents: diff changeset	224
a61af66fc99e Initial load duke parents: diff changeset	225 // Return true if an allocation should be attempted in the older
a61af66fc99e Initial load duke parents: diff changeset	226 // generation if it fails in the younger generation. Return
a61af66fc99e Initial load duke parents: diff changeset	227 // false, otherwise.
a61af66fc99e Initial load duke parents: diff changeset	228 virtual bool should_try_older_generation_allocation(size_t word_size) const;
a61af66fc99e Initial load duke parents: diff changeset	229
a61af66fc99e Initial load duke parents: diff changeset	230 void initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	231 void initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	232
a61af66fc99e Initial load duke parents: diff changeset	233 // Try to allocate space by expanding the heap.
a61af66fc99e Initial load duke parents: diff changeset	234 virtual HeapWord* expand_heap_and_allocate(size_t size, bool is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	235
a61af66fc99e Initial load duke parents: diff changeset	236 // compute max heap alignment
a61af66fc99e Initial load duke parents: diff changeset	237 size_t compute_max_alignment();
a61af66fc99e Initial load duke parents: diff changeset	238
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	239 // Scale the base_size by NewRation according to
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	240 // result = base_size / (NewRatio + 1)
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	241 // and align by min_alignment()
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	242 size_t scale_by_NewRatio_aligned(size_t base_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	243
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	244 // Bound the value by the given maximum minus the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	245 // min_alignment.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	246 size_t bound_minus_alignment(size_t desired_size, size_t maximum_size);
0 a61af66fc99e Initial load duke parents: diff changeset	247
a61af66fc99e Initial load duke parents: diff changeset	248 public:
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	249 // Accessors
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	250 size_t min_gen0_size() { return _min_gen0_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	251 void set_min_gen0_size(size_t v) { _min_gen0_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	252 size_t initial_gen0_size() { return _initial_gen0_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	253 void set_initial_gen0_size(size_t v) { _initial_gen0_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	254 size_t max_gen0_size() { return _max_gen0_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	255 void set_max_gen0_size(size_t v) { _max_gen0_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	256
0 a61af66fc99e Initial load duke parents: diff changeset	257 virtual int number_of_generations() = 0;
a61af66fc99e Initial load duke parents: diff changeset	258
a61af66fc99e Initial load duke parents: diff changeset	259 virtual GenerationSpec **generations() {
a61af66fc99e Initial load duke parents: diff changeset	260 assert(_generations != NULL, "Sanity check");
a61af66fc99e Initial load duke parents: diff changeset	261 return _generations;
a61af66fc99e Initial load duke parents: diff changeset	262 }
a61af66fc99e Initial load duke parents: diff changeset	263
a61af66fc99e Initial load duke parents: diff changeset	264 virtual GenCollectorPolicy* as_generation_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	265
a61af66fc99e Initial load duke parents: diff changeset	266 virtual void initialize_generations() = 0;
a61af66fc99e Initial load duke parents: diff changeset	267
a61af66fc99e Initial load duke parents: diff changeset	268 virtual void initialize_all() {
a61af66fc99e Initial load duke parents: diff changeset	269 initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	270 initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	271 initialize_generations();
a61af66fc99e Initial load duke parents: diff changeset	272 }
a61af66fc99e Initial load duke parents: diff changeset	273
a61af66fc99e Initial load duke parents: diff changeset	274 HeapWord* mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	275 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	276 bool* gc_overhead_limit_was_exceeded);
a61af66fc99e Initial load duke parents: diff changeset	277
a61af66fc99e Initial load duke parents: diff changeset	278 HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	279
a61af66fc99e Initial load duke parents: diff changeset	280 // Adaptive size policy
a61af66fc99e Initial load duke parents: diff changeset	281 virtual void initialize_size_policy(size_t init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	282 size_t init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	283 size_t init_survivor_size);
a61af66fc99e Initial load duke parents: diff changeset	284 };
a61af66fc99e Initial load duke parents: diff changeset	285
a61af66fc99e Initial load duke parents: diff changeset	286 // All of hotspot's current collectors are subtypes of this
a61af66fc99e Initial load duke parents: diff changeset	287 // class. Currently, these collectors all use the same gen[0],
a61af66fc99e Initial load duke parents: diff changeset	288 // but have different gen[1] types. If we add another subtype
a61af66fc99e Initial load duke parents: diff changeset	289 // of CollectorPolicy, this class should be broken out into
a61af66fc99e Initial load duke parents: diff changeset	290 // its own file.
a61af66fc99e Initial load duke parents: diff changeset	291
a61af66fc99e Initial load duke parents: diff changeset	292 class TwoGenerationCollectorPolicy : public GenCollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	293 protected:
a61af66fc99e Initial load duke parents: diff changeset	294 size_t _min_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	295 size_t _initial_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	296 size_t _max_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	297
a61af66fc99e Initial load duke parents: diff changeset	298 void initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	299 void initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	300 void initialize_generations() { ShouldNotReachHere(); }
a61af66fc99e Initial load duke parents: diff changeset	301
a61af66fc99e Initial load duke parents: diff changeset	302 public:
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	303 // Accessors
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	304 size_t min_gen1_size() { return _min_gen1_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	305 void set_min_gen1_size(size_t v) { _min_gen1_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	306 size_t initial_gen1_size() { return _initial_gen1_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	307 void set_initial_gen1_size(size_t v) { _initial_gen1_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	308 size_t max_gen1_size() { return _max_gen1_size; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	309 void set_max_gen1_size(size_t v) { _max_gen1_size = v; }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	310
0 a61af66fc99e Initial load duke parents: diff changeset	311 // Inherited methods
a61af66fc99e Initial load duke parents: diff changeset	312 TwoGenerationCollectorPolicy* as_two_generation_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	313
a61af66fc99e Initial load duke parents: diff changeset	314 int number_of_generations() { return 2; }
a61af66fc99e Initial load duke parents: diff changeset	315 BarrierSet::Name barrier_set_name() { return BarrierSet::CardTableModRef; }
a61af66fc99e Initial load duke parents: diff changeset	316 GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; }
a61af66fc99e Initial load duke parents: diff changeset	317
a61af66fc99e Initial load duke parents: diff changeset	318 virtual CollectorPolicy::Name kind() {
a61af66fc99e Initial load duke parents: diff changeset	319 return CollectorPolicy::TwoGenerationCollectorPolicyKind;
a61af66fc99e Initial load duke parents: diff changeset	320 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	321
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	322 // Returns true is gen0 sizes were adjusted
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	323 bool adjust_gen0_sizes(size_t* gen0_size_ptr, size_t* gen1_size_ptr,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	324 size_t heap_size, size_t min_gen1_size);
0 a61af66fc99e Initial load duke parents: diff changeset	325 };
a61af66fc99e Initial load duke parents: diff changeset	326
a61af66fc99e Initial load duke parents: diff changeset	327 class MarkSweepPolicy : public TwoGenerationCollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	328 protected:
a61af66fc99e Initial load duke parents: diff changeset	329 void initialize_generations();
a61af66fc99e Initial load duke parents: diff changeset	330
a61af66fc99e Initial load duke parents: diff changeset	331 public:
a61af66fc99e Initial load duke parents: diff changeset	332 MarkSweepPolicy();
a61af66fc99e Initial load duke parents: diff changeset	333
a61af66fc99e Initial load duke parents: diff changeset	334 MarkSweepPolicy* as_mark_sweep_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	335
a61af66fc99e Initial load duke parents: diff changeset	336 void initialize_gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	337 };
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	338
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	339 #endif // SHARE_VM_MEMORY_COLLECTORPOLICY_HPP

Mercurial > hg > graal-compiler

annotate src/share/vm/memory/collectorPolicy.hpp @ 6725:da91efe96a93