Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp @ 845:df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
| author | ysr |
|---|---|
| date | Tue, 14 Jul 2009 15:40:39 -0700 |
| parents | 0fbdb4381b99 |
| children | 148e5441d916 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 class AdjoiningGenerations; | |
| 26 class GCTaskManager; | |
| 27 class PSAdaptiveSizePolicy; | |
| 28 | |
| 29 class ParallelScavengeHeap : public CollectedHeap { | |
| 30 friend class VMStructs; | |
| 31 private: | |
| 32 static PSYoungGen* _young_gen; | |
| 33 static PSOldGen* _old_gen; | |
| 34 static PSPermGen* _perm_gen; | |
| 35 | |
| 36 // Sizing policy for entire heap | |
| 37 static PSAdaptiveSizePolicy* _size_policy; | |
| 38 static PSGCAdaptivePolicyCounters* _gc_policy_counters; | |
| 39 | |
| 40 static ParallelScavengeHeap* _psh; | |
| 41 | |
| 42 size_t _perm_gen_alignment; | |
| 43 size_t _young_gen_alignment; | |
| 44 size_t _old_gen_alignment; | |
| 45 | |
| 46 inline size_t set_alignment(size_t& var, size_t val); | |
| 47 | |
| 48 // Collection of generations that are adjacent in the | |
| 49 // space reserved for the heap. | |
| 50 AdjoiningGenerations* _gens; | |
| 51 | |
| 52 static GCTaskManager* _gc_task_manager; // The task manager. | |
| 53 | |
| 54 protected: | |
| 55 static inline size_t total_invocations(); | |
| 56 HeapWord* allocate_new_tlab(size_t size); | |
| 57 void fill_all_tlabs(bool retire); | |
| 58 | |
| 59 public: | |
| 60 ParallelScavengeHeap() : CollectedHeap() { | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
61 set_alignment(_perm_gen_alignment, intra_heap_alignment()); |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
62 set_alignment(_young_gen_alignment, intra_heap_alignment()); |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
63 set_alignment(_old_gen_alignment, intra_heap_alignment()); |
| 0 | 64 } |
| 65 | |
| 66 // For use by VM operations | |
| 67 enum CollectionType { | |
| 68 Scavenge, | |
| 69 MarkSweep | |
| 70 }; | |
| 71 | |
| 72 ParallelScavengeHeap::Name kind() const { | |
| 73 return CollectedHeap::ParallelScavengeHeap; | |
| 74 } | |
| 75 | |
| 76 static PSYoungGen* young_gen() { return _young_gen; } | |
| 77 static PSOldGen* old_gen() { return _old_gen; } | |
| 78 static PSPermGen* perm_gen() { return _perm_gen; } | |
| 79 | |
| 80 virtual PSAdaptiveSizePolicy* size_policy() { return _size_policy; } | |
| 81 | |
| 82 static PSGCAdaptivePolicyCounters* gc_policy_counters() { return _gc_policy_counters; } | |
| 83 | |
| 84 static ParallelScavengeHeap* heap(); | |
| 85 | |
| 86 static GCTaskManager* const gc_task_manager() { return _gc_task_manager; } | |
| 87 | |
| 88 AdjoiningGenerations* gens() { return _gens; } | |
| 89 | |
| 90 // Returns JNI_OK on success | |
| 91 virtual jint initialize(); | |
| 92 | |
| 93 void post_initialize(); | |
| 94 void update_counters(); | |
| 95 // The alignment used for the various generations. | |
| 96 size_t perm_gen_alignment() const { return _perm_gen_alignment; } | |
| 97 size_t young_gen_alignment() const { return _young_gen_alignment; } | |
| 98 size_t old_gen_alignment() const { return _old_gen_alignment; } | |
| 99 | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
100 // The alignment used for eden and survivors within the young gen |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
101 // and for boundary between young gen and old gen. |
|
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
102 size_t intra_heap_alignment() const { return 64 * K; } |
| 0 | 103 |
| 104 size_t capacity() const; | |
| 105 size_t used() const; | |
| 106 | |
| 107 // Return "true" if all generations (but perm) have reached the | |
| 108 // maximal committed limit that they can reach, without a garbage | |
| 109 // collection. | |
| 110 virtual bool is_maximal_no_gc() const; | |
| 111 | |
| 112 // Does this heap support heap inspection? (+PrintClassHistogram) | |
| 113 bool supports_heap_inspection() const { return true; } | |
| 114 | |
| 115 size_t permanent_capacity() const; | |
| 116 size_t permanent_used() const; | |
| 117 | |
| 118 size_t max_capacity() const; | |
| 119 | |
| 120 // Whether p is in the allocated part of the heap | |
| 121 bool is_in(const void* p) const; | |
| 122 | |
| 123 bool is_in_reserved(const void* p) const; | |
| 124 bool is_in_permanent(const void *p) const { // reserved part | |
| 125 return perm_gen()->reserved().contains(p); | |
| 126 } | |
| 127 | |
| 128 bool is_permanent(const void *p) const { // committed part | |
| 129 return perm_gen()->is_in(p); | |
| 130 } | |
| 131 | |
| 132 static bool is_in_young(oop *p); // reserved part | |
| 133 static bool is_in_old_or_perm(oop *p); // reserved part | |
| 134 | |
| 135 // Memory allocation. "gc_time_limit_was_exceeded" will | |
| 136 // be set to true if the adaptive size policy determine that | |
| 137 // an excessive amount of time is being spent doing collections | |
| 138 // and caused a NULL to be returned. If a NULL is not returned, | |
| 139 // "gc_time_limit_was_exceeded" has an undefined meaning. | |
| 140 | |
| 141 HeapWord* mem_allocate(size_t size, | |
| 142 bool is_noref, | |
| 143 bool is_tlab, | |
| 144 bool* gc_overhead_limit_was_exceeded); | |
| 145 HeapWord* failed_mem_allocate(size_t size, bool is_tlab); | |
| 146 | |
| 147 HeapWord* permanent_mem_allocate(size_t size); | |
| 148 HeapWord* failed_permanent_mem_allocate(size_t size); | |
| 149 | |
| 150 // Support for System.gc() | |
| 151 void collect(GCCause::Cause cause); | |
| 152 | |
| 153 // This interface assumes that it's being called by the | |
| 154 // vm thread. It collects the heap assuming that the | |
| 155 // heap lock is already held and that we are executing in | |
| 156 // the context of the vm thread. | |
| 157 void collect_as_vm_thread(GCCause::Cause cause); | |
| 158 | |
| 159 // These also should be called by the vm thread at a safepoint (e.g., from a | |
| 160 // VM operation). | |
| 161 // | |
| 162 // The first collects the young generation only, unless the scavenge fails; it | |
| 163 // will then attempt a full gc. The second collects the entire heap; if | |
| 164 // maximum_compaction is true, it will compact everything and clear all soft | |
| 165 // references. | |
| 166 inline void invoke_scavenge(); | |
| 167 inline void invoke_full_gc(bool maximum_compaction); | |
| 168 | |
| 169 size_t large_typearray_limit() { return FastAllocateSizeLimit; } | |
| 170 | |
| 171 bool supports_inline_contig_alloc() const { return !UseNUMA; } | |
| 141 | 172 |
| 173 HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; } | |
| 174 HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; } | |
| 0 | 175 |
| 176 void ensure_parsability(bool retire_tlabs); | |
| 177 void accumulate_statistics_all_tlabs(); | |
| 178 void resize_all_tlabs(); | |
| 179 | |
| 180 size_t unsafe_max_alloc(); | |
| 181 | |
| 182 bool supports_tlab_allocation() const { return true; } | |
| 183 | |
| 184 size_t tlab_capacity(Thread* thr) const; | |
| 185 size_t unsafe_max_tlab_alloc(Thread* thr) const; | |
| 186 | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
187 // Can a compiler initialize a new object without store barriers? |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
188 // This permission only extends from the creation of a new object |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
189 // via a TLAB up to the first subsequent safepoint. |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
190 virtual bool can_elide_tlab_store_barriers() const { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
191 return true; |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
192 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
193 |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
194 // Can a compiler elide a store barrier when it writes |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
195 // a permanent oop into the heap? Applies when the compiler |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
196 // is storing x to the heap, where x->is_perm() is true. |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
197 virtual bool can_elide_permanent_oop_store_barriers() const { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
198 return true; |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
199 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
200 |
| 0 | 201 void oop_iterate(OopClosure* cl); |
| 202 void object_iterate(ObjectClosure* cl); | |
|
517
e9be0e04635a
6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
jmasa
parents:
356
diff
changeset
|
203 void safe_object_iterate(ObjectClosure* cl) { object_iterate(cl); } |
| 0 | 204 void permanent_oop_iterate(OopClosure* cl); |
| 205 void permanent_object_iterate(ObjectClosure* cl); | |
| 206 | |
| 207 HeapWord* block_start(const void* addr) const; | |
| 208 size_t block_size(const HeapWord* addr) const; | |
| 209 bool block_is_obj(const HeapWord* addr) const; | |
| 210 | |
| 211 jlong millis_since_last_gc(); | |
| 212 | |
| 213 void prepare_for_verify(); | |
| 214 void print() const; | |
| 215 void print_on(outputStream* st) const; | |
| 216 virtual void print_gc_threads_on(outputStream* st) const; | |
| 217 virtual void gc_threads_do(ThreadClosure* tc) const; | |
| 218 virtual void print_tracing_info() const; | |
| 219 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
220 void verify(bool allow_dirty, bool silent, bool /* option */); |
| 0 | 221 |
| 222 void print_heap_change(size_t prev_used); | |
| 223 | |
| 224 // Resize the young generation. The reserved space for the | |
| 225 // generation may be expanded in preparation for the resize. | |
| 226 void resize_young_gen(size_t eden_size, size_t survivor_size); | |
| 227 | |
| 228 // Resize the old generation. The reserved space for the | |
| 229 // generation may be expanded in preparation for the resize. | |
| 230 void resize_old_gen(size_t desired_free_space); | |
|
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
231 |
|
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
232 // Save the tops of the spaces in all generations |
|
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
233 void record_gen_tops_before_GC() PRODUCT_RETURN; |
|
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
234 |
|
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
235 // Mangle the unused parts of all spaces in the heap |
|
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
141
diff
changeset
|
236 void gen_mangle_unused_area() PRODUCT_RETURN; |
| 0 | 237 }; |
| 238 | |
| 239 inline size_t ParallelScavengeHeap::set_alignment(size_t& var, size_t val) | |
| 240 { | |
| 241 assert(is_power_of_2((intptr_t)val), "must be a power of 2"); | |
|
13
183f41cf8bfe
6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO
jmasa
parents:
0
diff
changeset
|
242 var = round_to(val, intra_heap_alignment()); |
| 0 | 243 return var; |
| 244 } |