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annotate src/share/vm/memory/tenuredGeneration.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | a7214d79fcf1 |
| children | db9981fd3124 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_TENUREDGENERATION_HPP |
| 26 #define SHARE_VM_MEMORY_TENUREDGENERATION_HPP | |
| 27 | |
| 28 #include "gc_implementation/shared/cSpaceCounters.hpp" | |
| 29 #include "gc_implementation/shared/gcStats.hpp" | |
| 30 #include "gc_implementation/shared/generationCounters.hpp" | |
| 31 #include "memory/generation.hpp" | |
| 32 | |
| 0 | 33 // TenuredGeneration models the heap containing old (promoted/tenured) objects. |
| 34 | |
| 35 class ParGCAllocBufferWithBOT; | |
| 36 | |
| 37 class TenuredGeneration: public OneContigSpaceCardGeneration { | |
| 38 friend class VMStructs; | |
| 39 protected: | |
| 40 // current shrinking effect: this damps shrinking when the heap gets empty. | |
| 41 size_t _shrink_factor; | |
| 42 // Some statistics from before gc started. | |
| 43 // These are gathered in the gc_prologue (and should_collect) | |
| 44 // to control growing/shrinking policy in spite of promotions. | |
| 45 size_t _capacity_at_prologue; | |
| 46 size_t _used_at_prologue; | |
| 47 | |
| 48 #ifndef SERIALGC | |
| 49 // To support parallel promotion: an array of parallel allocation | |
| 50 // buffers, one per thread, initially NULL. | |
| 51 ParGCAllocBufferWithBOT** _alloc_buffers; | |
| 52 #endif // SERIALGC | |
| 53 | |
| 54 // Retire all alloc buffers before a full GC, so that they will be | |
| 55 // re-allocated at the start of the next young GC. | |
| 56 void retire_alloc_buffers_before_full_gc(); | |
| 57 | |
| 58 GenerationCounters* _gen_counters; | |
| 59 CSpaceCounters* _space_counters; | |
| 60 | |
| 61 public: | |
| 62 TenuredGeneration(ReservedSpace rs, size_t initial_byte_size, int level, | |
| 63 GenRemSet* remset); | |
| 64 | |
| 65 Generation::Name kind() { return Generation::MarkSweepCompact; } | |
| 66 | |
| 67 // Printing | |
| 68 const char* name() const; | |
| 69 const char* short_name() const { return "Tenured"; } | |
| 70 bool must_be_youngest() const { return false; } | |
| 71 bool must_be_oldest() const { return true; } | |
| 72 | |
| 73 // Does a "full" (forced) collection invoked on this generation collect | |
| 74 // all younger generations as well? Note that this is a | |
| 75 // hack to allow the collection of the younger gen first if the flag is | |
| 76 // set. This is better than using th policy's should_collect_gen0_first() | |
| 77 // since that causes us to do an extra unnecessary pair of restart-&-stop-world. | |
| 78 virtual bool full_collects_younger_generations() const { | |
| 79 return !CollectGen0First; | |
| 80 } | |
| 81 | |
| 82 // Mark sweep support | |
| 83 void compute_new_size(); | |
| 84 | |
| 85 virtual void gc_prologue(bool full); | |
| 86 virtual void gc_epilogue(bool full); | |
| 87 bool should_collect(bool full, | |
| 88 size_t word_size, | |
| 89 bool is_tlab); | |
| 90 | |
| 91 virtual void collect(bool full, | |
| 92 bool clear_all_soft_refs, | |
| 93 size_t size, | |
| 94 bool is_tlab); | |
| 95 | |
| 96 #ifndef SERIALGC | |
| 97 // Overrides. | |
| 98 virtual oop par_promote(int thread_num, | |
| 99 oop obj, markOop m, size_t word_sz); | |
| 100 virtual void par_promote_alloc_undo(int thread_num, | |
| 101 HeapWord* obj, size_t word_sz); | |
| 102 virtual void par_promote_alloc_done(int thread_num); | |
| 103 #endif // SERIALGC | |
| 104 | |
| 105 // Performance Counter support | |
| 106 void update_counters(); | |
| 107 | |
| 108 // Statistics | |
| 109 | |
| 110 virtual void update_gc_stats(int level, bool full); | |
| 111 | |
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112 virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const; |
| 0 | 113 |
| 114 void verify_alloc_buffers_clean(); | |
| 115 }; | |
| 1972 | 116 |
| 117 #endif // SHARE_VM_MEMORY_TENUREDGENERATION_HPP |