Mercurial > hg > graal-compiler
annotate src/share/vm/memory/tenuredGeneration.hpp @ 8124:5fc51c1ecdeb
Merge.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Tue, 05 Mar 2013 23:44:54 +0100 |
| parents | db9981fd3124 |
| children | 8617e38bb4cb |
| 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
470
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
470
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:
470
diff
changeset
|
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" | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
1972
diff
changeset
|
32 #include "utilities/macros.hpp" |
| 1972 | 33 |
| 0 | 34 // TenuredGeneration models the heap containing old (promoted/tenured) objects. |
| 35 | |
| 36 class ParGCAllocBufferWithBOT; | |
| 37 | |
| 38 class TenuredGeneration: public OneContigSpaceCardGeneration { | |
| 39 friend class VMStructs; | |
| 40 protected: | |
| 41 // current shrinking effect: this damps shrinking when the heap gets empty. | |
| 42 size_t _shrink_factor; | |
| 43 // Some statistics from before gc started. | |
| 44 // These are gathered in the gc_prologue (and should_collect) | |
| 45 // to control growing/shrinking policy in spite of promotions. | |
| 46 size_t _capacity_at_prologue; | |
| 47 size_t _used_at_prologue; | |
| 48 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
1972
diff
changeset
|
49 #if INCLUDE_ALL_GCS |
| 0 | 50 // To support parallel promotion: an array of parallel allocation |
| 51 // buffers, one per thread, initially NULL. | |
| 52 ParGCAllocBufferWithBOT** _alloc_buffers; | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
1972
diff
changeset
|
53 #endif // INCLUDE_ALL_GCS |
| 0 | 54 |
| 55 // Retire all alloc buffers before a full GC, so that they will be | |
| 56 // re-allocated at the start of the next young GC. | |
| 57 void retire_alloc_buffers_before_full_gc(); | |
| 58 | |
| 59 GenerationCounters* _gen_counters; | |
| 60 CSpaceCounters* _space_counters; | |
| 61 | |
| 62 public: | |
| 63 TenuredGeneration(ReservedSpace rs, size_t initial_byte_size, int level, | |
| 64 GenRemSet* remset); | |
| 65 | |
| 66 Generation::Name kind() { return Generation::MarkSweepCompact; } | |
| 67 | |
| 68 // Printing | |
| 69 const char* name() const; | |
| 70 const char* short_name() const { return "Tenured"; } | |
| 71 bool must_be_youngest() const { return false; } | |
| 72 bool must_be_oldest() const { return true; } | |
| 73 | |
| 74 // Does a "full" (forced) collection invoked on this generation collect | |
| 75 // all younger generations as well? Note that this is a | |
| 76 // hack to allow the collection of the younger gen first if the flag is | |
| 77 // set. This is better than using th policy's should_collect_gen0_first() | |
| 78 // since that causes us to do an extra unnecessary pair of restart-&-stop-world. | |
| 79 virtual bool full_collects_younger_generations() const { | |
| 80 return !CollectGen0First; | |
| 81 } | |
| 82 | |
| 83 // Mark sweep support | |
| 84 void compute_new_size(); | |
| 85 | |
| 86 virtual void gc_prologue(bool full); | |
| 87 virtual void gc_epilogue(bool full); | |
| 88 bool should_collect(bool full, | |
| 89 size_t word_size, | |
| 90 bool is_tlab); | |
| 91 | |
| 92 virtual void collect(bool full, | |
| 93 bool clear_all_soft_refs, | |
| 94 size_t size, | |
| 95 bool is_tlab); | |
| 96 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
1972
diff
changeset
|
97 #if INCLUDE_ALL_GCS |
| 0 | 98 // Overrides. |
| 99 virtual oop par_promote(int thread_num, | |
| 100 oop obj, markOop m, size_t word_sz); | |
| 101 virtual void par_promote_alloc_undo(int thread_num, | |
| 102 HeapWord* obj, size_t word_sz); | |
| 103 virtual void par_promote_alloc_done(int thread_num); | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
1972
diff
changeset
|
104 #endif // INCLUDE_ALL_GCS |
| 0 | 105 |
| 106 // Performance Counter support | |
| 107 void update_counters(); | |
| 108 | |
| 109 // Statistics | |
| 110 | |
| 111 virtual void update_gc_stats(int level, bool full); | |
| 112 | |
|
1888
a7214d79fcf1
6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data
ysr
parents:
1552
diff
changeset
|
113 virtual bool promotion_attempt_is_safe(size_t max_promoted_in_bytes) const; |
| 0 | 114 |
| 115 void verify_alloc_buffers_clean(); | |
| 116 }; | |
| 1972 | 117 |
| 118 #endif // SHARE_VM_MEMORY_TENUREDGENERATION_HPP |