truffle: src/share/vm/memory/collectorPolicy.hpp annotate

annotate src/share/vm/memory/collectorPolicy.hpp @ 13057:4288e54fd145

8026851: Remove unnecessary code in GenRemSet Summary: Removed the GenRemSet::rem_set_name() since we only have one remset. Reviewed-by: stefank, mgerdin, tschatzl

author	jwilhelm
date	Mon, 21 Oct 2013 18:51:37 +0200
parents	9b4d0569f2f4
children	46d7652b223c

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 6725 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 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"
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	32 #include "utilities/macros.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	33
0 a61af66fc99e Initial load duke parents: diff changeset	34 // This class (or more correctly, subtypes of this class)
a61af66fc99e Initial load duke parents: diff changeset	35 // are used to define global garbage collector attributes.
a61af66fc99e Initial load duke parents: diff changeset	36 // This includes initialization of generations and any other
a61af66fc99e Initial load duke parents: diff changeset	37 // shared resources they may need.
a61af66fc99e Initial load duke parents: diff changeset	38 //
a61af66fc99e Initial load duke parents: diff changeset	39 // In general, all flag adjustment and validation should be
a61af66fc99e Initial load duke parents: diff changeset	40 // done in initialize_flags(), which is called prior to
a61af66fc99e Initial load duke parents: diff changeset	41 // initialize_size_info().
a61af66fc99e Initial load duke parents: diff changeset	42 //
a61af66fc99e Initial load duke parents: diff changeset	43 // This class is not fully developed yet. As more collector(s)
a61af66fc99e Initial load duke parents: diff changeset	44 // are added, it is expected that we will come across further
a61af66fc99e Initial load duke parents: diff changeset	45 // behavior that requires global attention. The correct place
a61af66fc99e Initial load duke parents: diff changeset	46 // to deal with those issues is this class.
a61af66fc99e Initial load duke parents: diff changeset	47
a61af66fc99e Initial load duke parents: diff changeset	48 // Forward declarations.
a61af66fc99e Initial load duke parents: diff changeset	49 class GenCollectorPolicy;
a61af66fc99e Initial load duke parents: diff changeset	50 class TwoGenerationCollectorPolicy;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	51 class AdaptiveSizePolicy;
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	52 #if INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	53 class ConcurrentMarkSweepPolicy;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	54 class G1CollectorPolicy;
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	55 #endif // INCLUDE_ALL_GCS
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	56
0 a61af66fc99e Initial load duke parents: diff changeset	57 class GCPolicyCounters;
a61af66fc99e Initial load duke parents: diff changeset	58 class MarkSweepPolicy;
a61af66fc99e Initial load duke parents: diff changeset	59
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 3774 diff changeset	60 class CollectorPolicy : public CHeapObj<mtGC> {
0 a61af66fc99e Initial load duke parents: diff changeset	61 protected:
a61af66fc99e Initial load duke parents: diff changeset	62 GCPolicyCounters* _gc_policy_counters;
a61af66fc99e Initial load duke parents: diff changeset	63
a61af66fc99e Initial load duke parents: diff changeset	64 // Requires that the concrete subclass sets the alignment constraints
a61af66fc99e Initial load duke parents: diff changeset	65 // before calling.
a61af66fc99e Initial load duke parents: diff changeset	66 virtual void initialize_flags();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	67 virtual void initialize_size_info();
0 a61af66fc99e Initial load duke parents: diff changeset	68
a61af66fc99e Initial load duke parents: diff changeset	69 size_t _initial_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	70 size_t _max_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	71 size_t _min_heap_byte_size;
a61af66fc99e Initial load duke parents: diff changeset	72
a61af66fc99e Initial load duke parents: diff changeset	73 size_t _min_alignment;
a61af66fc99e Initial load duke parents: diff changeset	74 size_t _max_alignment;
a61af66fc99e Initial load duke parents: diff changeset	75
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	76 // 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	77 AdaptiveSizePolicy* _size_policy;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	78
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	79 // 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	80 // 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	81 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	82 // 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	83 // 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	84 // 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	85 // 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	86 // 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	87 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	88
0 a61af66fc99e Initial load duke parents: diff changeset	89 CollectorPolicy() :
a61af66fc99e Initial load duke parents: diff changeset	90 _min_alignment(1),
a61af66fc99e Initial load duke parents: diff changeset	91 _max_alignment(1),
a61af66fc99e Initial load duke parents: diff changeset	92 _initial_heap_byte_size(0),
a61af66fc99e Initial load duke parents: diff changeset	93 _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	94 _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	95 _size_policy(NULL),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	96 _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	97 _all_soft_refs_clear(false)
0 a61af66fc99e Initial load duke parents: diff changeset	98 {}
a61af66fc99e Initial load duke parents: diff changeset	99
a61af66fc99e Initial load duke parents: diff changeset	100 public:
12233 40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 8016 diff changeset	101 // Return maximum heap alignment that may be imposed by the policy
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 8016 diff changeset	102 static size_t compute_max_alignment();
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 8016 diff changeset	103
0 a61af66fc99e Initial load duke parents: diff changeset	104 size_t min_alignment() { return _min_alignment; }
a61af66fc99e Initial load duke parents: diff changeset	105 size_t max_alignment() { return _max_alignment; }
a61af66fc99e Initial load duke parents: diff changeset	106
a61af66fc99e Initial load duke parents: diff changeset	107 size_t initial_heap_byte_size() { return _initial_heap_byte_size; }
a61af66fc99e Initial load duke parents: diff changeset	108 size_t max_heap_byte_size() { return _max_heap_byte_size; }
a61af66fc99e Initial load duke parents: diff changeset	109 size_t min_heap_byte_size() { return _min_heap_byte_size; }
a61af66fc99e Initial load duke parents: diff changeset	110
a61af66fc99e Initial load duke parents: diff changeset	111 enum Name {
a61af66fc99e Initial load duke parents: diff changeset	112 CollectorPolicyKind,
a61af66fc99e Initial load duke parents: diff changeset	113 TwoGenerationCollectorPolicyKind,
a61af66fc99e Initial load duke parents: diff changeset	114 ConcurrentMarkSweepPolicyKind,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	115 ASConcurrentMarkSweepPolicyKind,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	116 G1CollectorPolicyKind
0 a61af66fc99e Initial load duke parents: diff changeset	117 };
a61af66fc99e Initial load duke parents: diff changeset	118
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	119 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	120 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	121 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	122 // 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	123 // _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	124 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	125 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	126 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	127
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	128 // 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	129 // 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	130 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	131
0 a61af66fc99e Initial load duke parents: diff changeset	132 // Identification methods.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	133 virtual GenCollectorPolicy* as_generation_policy() { return NULL; }
0 a61af66fc99e Initial load duke parents: diff changeset	134 virtual TwoGenerationCollectorPolicy* as_two_generation_policy() { return NULL; }
a61af66fc99e Initial load duke parents: diff changeset	135 virtual MarkSweepPolicy* as_mark_sweep_policy() { return NULL; }
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	136 #if INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	137 virtual ConcurrentMarkSweepPolicy* as_concurrent_mark_sweep_policy() { return NULL; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	138 virtual G1CollectorPolicy* as_g1_policy() { return NULL; }
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	139 #endif // INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	140 // Note that these are not virtual.
a61af66fc99e Initial load duke parents: diff changeset	141 bool is_generation_policy() { return as_generation_policy() != NULL; }
a61af66fc99e Initial load duke parents: diff changeset	142 bool is_two_generation_policy() { return as_two_generation_policy() != NULL; }
a61af66fc99e Initial load duke parents: diff changeset	143 bool is_mark_sweep_policy() { return as_mark_sweep_policy() != NULL; }
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	144 #if INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	145 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	146 bool is_g1_policy() { return as_g1_policy() != NULL; }
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	147 #else // INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	148 bool is_concurrent_mark_sweep_policy() { return false; }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	149 bool is_g1_policy() { return false; }
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 6725 diff changeset	150 #endif // INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	151
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	152
0 a61af66fc99e Initial load duke parents: diff changeset	153 virtual BarrierSet::Name barrier_set_name() = 0;
a61af66fc99e Initial load duke parents: diff changeset	154
a61af66fc99e Initial load duke parents: diff changeset	155 // Create the remembered set (to cover the given reserved region,
a61af66fc99e Initial load duke parents: diff changeset	156 // allowing breaking up into at most "max_covered_regions").
a61af66fc99e Initial load duke parents: diff changeset	157 virtual GenRemSet* create_rem_set(MemRegion reserved,
a61af66fc99e Initial load duke parents: diff changeset	158 int max_covered_regions);
a61af66fc99e Initial load duke parents: diff changeset	159
a61af66fc99e Initial load duke parents: diff changeset	160 // This method controls how a collector satisfies a request
a61af66fc99e Initial load duke parents: diff changeset	161 // for a block of memory. "gc_time_limit_was_exceeded" will
a61af66fc99e Initial load duke parents: diff changeset	162 // be set to true if the adaptive size policy determine that
a61af66fc99e Initial load duke parents: diff changeset	163 // an excessive amount of time is being spent doing collections
a61af66fc99e Initial load duke parents: diff changeset	164 // and caused a NULL to be returned. If a NULL is not returned,
a61af66fc99e Initial load duke parents: diff changeset	165 // "gc_time_limit_was_exceeded" has an undefined meaning.
a61af66fc99e Initial load duke parents: diff changeset	166 virtual HeapWord* mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	167 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	168 bool* gc_overhead_limit_was_exceeded) = 0;
a61af66fc99e Initial load duke parents: diff changeset	169
a61af66fc99e Initial load duke parents: diff changeset	170 // This method controls how a collector handles one or more
a61af66fc99e Initial load duke parents: diff changeset	171 // of its generations being fully allocated.
a61af66fc99e Initial load duke parents: diff changeset	172 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	173 // 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	174 // failure.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	175 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	176 size_t size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	177 Metaspace::MetadataType mdtype);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	178
0 a61af66fc99e Initial load duke parents: diff changeset	179 // Performace Counter support
a61af66fc99e Initial load duke parents: diff changeset	180 GCPolicyCounters* counters() { return _gc_policy_counters; }
a61af66fc99e Initial load duke parents: diff changeset	181
a61af66fc99e Initial load duke parents: diff changeset	182 // Create the jstat counters for the GC policy. By default, policy's
a61af66fc99e Initial load duke parents: diff changeset	183 // don't have associated counters, and we complain if this is invoked.
a61af66fc99e Initial load duke parents: diff changeset	184 virtual void initialize_gc_policy_counters() {
a61af66fc99e Initial load duke parents: diff changeset	185 ShouldNotReachHere();
a61af66fc99e Initial load duke parents: diff changeset	186 }
a61af66fc99e Initial load duke parents: diff changeset	187
a61af66fc99e Initial load duke parents: diff changeset	188 virtual CollectorPolicy::Name kind() {
a61af66fc99e Initial load duke parents: diff changeset	189 return CollectorPolicy::CollectorPolicyKind;
a61af66fc99e Initial load duke parents: diff changeset	190 }
a61af66fc99e Initial load duke parents: diff changeset	191
a61af66fc99e Initial load duke parents: diff changeset	192 // Returns true if a collector has eden space with soft end.
a61af66fc99e Initial load duke parents: diff changeset	193 virtual bool has_soft_ended_eden() {
a61af66fc99e Initial load duke parents: diff changeset	194 return false;
a61af66fc99e Initial load duke parents: diff changeset	195 }
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 };
a61af66fc99e Initial load duke parents: diff changeset	198
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	199 class ClearedAllSoftRefs : public StackObj {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	200 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	201 CollectorPolicy* _collector_policy;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	202 public:
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	203 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	204 CollectorPolicy* collector_policy) :
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	205 _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	206 _collector_policy(collector_policy) {}
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	207
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	208 ~ClearedAllSoftRefs() {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	209 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	210 _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	211 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 356 diff changeset	212 }
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
0 a61af66fc99e Initial load duke parents: diff changeset	215 class GenCollectorPolicy : public CollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	216 protected:
a61af66fc99e Initial load duke parents: diff changeset	217 size_t _min_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	218 size_t _initial_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	219 size_t _max_gen0_size;
a61af66fc99e Initial load duke parents: diff changeset	220
a61af66fc99e Initial load duke parents: diff changeset	221 GenerationSpec **_generations;
a61af66fc99e Initial load duke parents: diff changeset	222
a61af66fc99e Initial load duke parents: diff changeset	223 // Return true if an allocation should be attempted in the older
a61af66fc99e Initial load duke parents: diff changeset	224 // generation if it fails in the younger generation. Return
a61af66fc99e Initial load duke parents: diff changeset	225 // false, otherwise.
a61af66fc99e Initial load duke parents: diff changeset	226 virtual bool should_try_older_generation_allocation(size_t word_size) const;
a61af66fc99e Initial load duke parents: diff changeset	227
a61af66fc99e Initial load duke parents: diff changeset	228 void initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	229 void initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	230
a61af66fc99e Initial load duke parents: diff changeset	231 // Try to allocate space by expanding the heap.
a61af66fc99e Initial load duke parents: diff changeset	232 virtual HeapWord* expand_heap_and_allocate(size_t size, bool is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	233
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	234 // 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	235 // result = base_size / (NewRatio + 1)
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	236 // and align by min_alignment()
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	237 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	238
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	239 // 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	240 // min_alignment.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	241 size_t bound_minus_alignment(size_t desired_size, size_t maximum_size);
0 a61af66fc99e Initial load duke parents: diff changeset	242
a61af66fc99e Initial load duke parents: diff changeset	243 public:
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	244 // Accessors
12830 9b4d0569f2f4 8025852: Remove unnecessary setters in collector policy classes jwilhelm parents: 12233 diff changeset	245 size_t min_gen0_size() { return _min_gen0_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	246 size_t initial_gen0_size() { return _initial_gen0_size; }
12830 9b4d0569f2f4 8025852: Remove unnecessary setters in collector policy classes jwilhelm parents: 12233 diff changeset	247 size_t max_gen0_size() { return _max_gen0_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	248
0 a61af66fc99e Initial load duke parents: diff changeset	249 virtual int number_of_generations() = 0;
a61af66fc99e Initial load duke parents: diff changeset	250
a61af66fc99e Initial load duke parents: diff changeset	251 virtual GenerationSpec **generations() {
a61af66fc99e Initial load duke parents: diff changeset	252 assert(_generations != NULL, "Sanity check");
a61af66fc99e Initial load duke parents: diff changeset	253 return _generations;
a61af66fc99e Initial load duke parents: diff changeset	254 }
a61af66fc99e Initial load duke parents: diff changeset	255
a61af66fc99e Initial load duke parents: diff changeset	256 virtual GenCollectorPolicy* as_generation_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	257
a61af66fc99e Initial load duke parents: diff changeset	258 virtual void initialize_generations() = 0;
a61af66fc99e Initial load duke parents: diff changeset	259
a61af66fc99e Initial load duke parents: diff changeset	260 virtual void initialize_all() {
a61af66fc99e Initial load duke parents: diff changeset	261 initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	262 initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	263 initialize_generations();
a61af66fc99e Initial load duke parents: diff changeset	264 }
a61af66fc99e Initial load duke parents: diff changeset	265
a61af66fc99e Initial load duke parents: diff changeset	266 HeapWord* mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	267 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	268 bool* gc_overhead_limit_was_exceeded);
a61af66fc99e Initial load duke parents: diff changeset	269
a61af66fc99e Initial load duke parents: diff changeset	270 HeapWord *satisfy_failed_allocation(size_t size, bool is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	271
a61af66fc99e Initial load duke parents: diff changeset	272 // Adaptive size policy
a61af66fc99e Initial load duke parents: diff changeset	273 virtual void initialize_size_policy(size_t init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	274 size_t init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	275 size_t init_survivor_size);
a61af66fc99e Initial load duke parents: diff changeset	276 };
a61af66fc99e Initial load duke parents: diff changeset	277
a61af66fc99e Initial load duke parents: diff changeset	278 // All of hotspot's current collectors are subtypes of this
a61af66fc99e Initial load duke parents: diff changeset	279 // class. Currently, these collectors all use the same gen[0],
a61af66fc99e Initial load duke parents: diff changeset	280 // but have different gen[1] types. If we add another subtype
a61af66fc99e Initial load duke parents: diff changeset	281 // of CollectorPolicy, this class should be broken out into
a61af66fc99e Initial load duke parents: diff changeset	282 // its own file.
a61af66fc99e Initial load duke parents: diff changeset	283
a61af66fc99e Initial load duke parents: diff changeset	284 class TwoGenerationCollectorPolicy : public GenCollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	285 protected:
a61af66fc99e Initial load duke parents: diff changeset	286 size_t _min_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	287 size_t _initial_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	288 size_t _max_gen1_size;
a61af66fc99e Initial load duke parents: diff changeset	289
a61af66fc99e Initial load duke parents: diff changeset	290 void initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	291 void initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	292 void initialize_generations() { ShouldNotReachHere(); }
a61af66fc99e Initial load duke parents: diff changeset	293
a61af66fc99e Initial load duke parents: diff changeset	294 public:
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	295 // Accessors
12830 9b4d0569f2f4 8025852: Remove unnecessary setters in collector policy classes jwilhelm parents: 12233 diff changeset	296 size_t min_gen1_size() { return _min_gen1_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	297 size_t initial_gen1_size() { return _initial_gen1_size; }
12830 9b4d0569f2f4 8025852: Remove unnecessary setters in collector policy classes jwilhelm parents: 12233 diff changeset	298 size_t max_gen1_size() { return _max_gen1_size; }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	299
0 a61af66fc99e Initial load duke parents: diff changeset	300 // Inherited methods
a61af66fc99e Initial load duke parents: diff changeset	301 TwoGenerationCollectorPolicy* as_two_generation_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	302
a61af66fc99e Initial load duke parents: diff changeset	303 int number_of_generations() { return 2; }
a61af66fc99e Initial load duke parents: diff changeset	304 BarrierSet::Name barrier_set_name() { return BarrierSet::CardTableModRef; }
a61af66fc99e Initial load duke parents: diff changeset	305
a61af66fc99e Initial load duke parents: diff changeset	306 virtual CollectorPolicy::Name kind() {
a61af66fc99e Initial load duke parents: diff changeset	307 return CollectorPolicy::TwoGenerationCollectorPolicyKind;
a61af66fc99e Initial load duke parents: diff changeset	308 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	309
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	310 // Returns true is gen0 sizes were adjusted
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	311 bool adjust_gen0_sizes(size_t* gen0_size_ptr, size_t* gen1_size_ptr,
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 6725 diff changeset	312 const size_t heap_size, const size_t min_gen1_size);
0 a61af66fc99e Initial load duke parents: diff changeset	313 };
a61af66fc99e Initial load duke parents: diff changeset	314
a61af66fc99e Initial load duke parents: diff changeset	315 class MarkSweepPolicy : public TwoGenerationCollectorPolicy {
a61af66fc99e Initial load duke parents: diff changeset	316 protected:
a61af66fc99e Initial load duke parents: diff changeset	317 void initialize_generations();
a61af66fc99e Initial load duke parents: diff changeset	318
a61af66fc99e Initial load duke parents: diff changeset	319 public:
a61af66fc99e Initial load duke parents: diff changeset	320 MarkSweepPolicy();
a61af66fc99e Initial load duke parents: diff changeset	321
a61af66fc99e Initial load duke parents: diff changeset	322 MarkSweepPolicy* as_mark_sweep_policy() { return this; }
a61af66fc99e Initial load duke parents: diff changeset	323
a61af66fc99e Initial load duke parents: diff changeset	324 void initialize_gc_policy_counters();
a61af66fc99e Initial load duke parents: diff changeset	325 };
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	326
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	327 #endif // SHARE_VM_MEMORY_COLLECTORPOLICY_HPP

Mercurial > hg > truffle

annotate src/share/vm/memory/collectorPolicy.hpp @ 13057:4288e54fd145