Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/psYoungGen.hpp @ 1286:ab75c83d7c37
Merge
author | johnc |
---|---|
date | Tue, 02 Mar 2010 13:57:46 -0800 |
parents | 9ee9cf798b59 |
children | c18cbe5936b8 |
rev | line source |
---|---|
0 | 1 /* |
337 | 2 * Copyright 2001-2008 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 PSMarkSweepDecorator; | |
26 | |
27 class PSYoungGen : public CHeapObj { | |
28 friend class VMStructs; | |
29 friend class ParallelScavengeHeap; | |
30 friend class AdjoiningGenerations; | |
31 | |
32 protected: | |
33 MemRegion _reserved; | |
34 PSVirtualSpace* _virtual_space; | |
35 | |
36 // Spaces | |
37 MutableSpace* _eden_space; | |
38 MutableSpace* _from_space; | |
39 MutableSpace* _to_space; | |
40 | |
41 | |
42 // MarkSweep Decorators | |
43 PSMarkSweepDecorator* _eden_mark_sweep; | |
44 PSMarkSweepDecorator* _from_mark_sweep; | |
45 PSMarkSweepDecorator* _to_mark_sweep; | |
46 | |
47 // Sizing information, in bytes, set in constructor | |
48 const size_t _init_gen_size; | |
49 const size_t _min_gen_size; | |
50 const size_t _max_gen_size; | |
51 | |
52 // Performance counters | |
53 PSGenerationCounters* _gen_counters; | |
54 SpaceCounters* _eden_counters; | |
55 SpaceCounters* _from_counters; | |
56 SpaceCounters* _to_counters; | |
57 | |
58 // Initialize the space boundaries | |
59 void compute_initial_space_boundaries(); | |
60 | |
61 // Space boundary helper | |
62 void set_space_boundaries(size_t eden_size, size_t survivor_size); | |
63 | |
64 virtual bool resize_generation(size_t eden_size, size_t survivor_size); | |
65 virtual void resize_spaces(size_t eden_size, size_t survivor_size); | |
66 | |
67 // Adjust the spaces to be consistent with the virtual space. | |
68 void post_resize(); | |
69 | |
70 // Return number of bytes that the generation can change. | |
71 // These should not be used by PSYoungGen | |
72 virtual size_t available_for_expansion(); | |
73 virtual size_t available_for_contraction(); | |
74 | |
75 // Given a desired shrinkage in the size of the young generation, | |
76 // return the actual size available for shrinkage. | |
77 virtual size_t limit_gen_shrink(size_t desired_change); | |
78 // returns the number of bytes available from the current size | |
79 // down to the minimum generation size. | |
80 size_t available_to_min_gen(); | |
81 // Return the number of bytes available for shrinkage considering | |
82 // the location the live data in the generation. | |
83 virtual size_t available_to_live(); | |
84 | |
85 public: | |
86 // Initialize the generation. | |
87 PSYoungGen(size_t initial_byte_size, | |
88 size_t minimum_byte_size, | |
89 size_t maximum_byte_size); | |
90 void initialize_work(); | |
91 virtual void initialize(ReservedSpace rs, size_t alignment); | |
92 virtual void initialize_virtual_space(ReservedSpace rs, size_t alignment); | |
93 | |
94 MemRegion reserved() const { return _reserved; } | |
95 | |
96 bool is_in(const void* p) const { | |
97 return _virtual_space->contains((void *)p); | |
98 } | |
99 | |
100 bool is_in_reserved(const void* p) const { | |
101 return reserved().contains((void *)p); | |
102 } | |
103 | |
104 MutableSpace* eden_space() const { return _eden_space; } | |
105 MutableSpace* from_space() const { return _from_space; } | |
106 MutableSpace* to_space() const { return _to_space; } | |
107 PSVirtualSpace* virtual_space() const { return _virtual_space; } | |
108 | |
109 // For Adaptive size policy | |
110 size_t min_gen_size() { return _min_gen_size; } | |
111 | |
112 // MarkSweep support | |
113 PSMarkSweepDecorator* eden_mark_sweep() const { return _eden_mark_sweep; } | |
114 PSMarkSweepDecorator* from_mark_sweep() const { return _from_mark_sweep; } | |
115 PSMarkSweepDecorator* to_mark_sweep() const { return _to_mark_sweep; } | |
116 | |
117 void precompact(); | |
118 void adjust_pointers(); | |
119 void compact(); | |
120 | |
121 // Parallel Old | |
122 void move_and_update(ParCompactionManager* cm); | |
123 | |
124 // Called during/after gc | |
125 void swap_spaces(); | |
126 | |
127 // Resize generation using suggested free space size and survivor size | |
128 // NOTE: "eden_size" and "survivor_size" are suggestions only. Current | |
129 // heap layout (particularly, live objects in from space) might | |
130 // not allow us to use these values. | |
131 void resize(size_t eden_size, size_t survivor_size); | |
132 | |
133 // Size info | |
134 size_t capacity_in_bytes() const; | |
135 size_t used_in_bytes() const; | |
136 size_t free_in_bytes() const; | |
137 | |
138 size_t capacity_in_words() const; | |
139 size_t used_in_words() const; | |
140 size_t free_in_words() const; | |
141 | |
142 // The max this generation can grow to | |
143 size_t max_size() const { return _reserved.byte_size(); } | |
144 | |
145 // The max this generation can grow to if the boundary between | |
146 // the generations are allowed to move. | |
147 size_t gen_size_limit() const { return _max_gen_size; } | |
148 | |
149 bool is_maximal_no_gc() const { | |
150 return true; // never expands except at a GC | |
151 } | |
152 | |
153 // Allocation | |
154 HeapWord* allocate(size_t word_size, bool is_tlab) { | |
155 HeapWord* result = eden_space()->cas_allocate(word_size); | |
156 return result; | |
157 } | |
158 | |
159 HeapWord** top_addr() const { return eden_space()->top_addr(); } | |
160 HeapWord** end_addr() const { return eden_space()->end_addr(); } | |
161 | |
162 // Iteration. | |
163 void oop_iterate(OopClosure* cl); | |
164 void object_iterate(ObjectClosure* cl); | |
165 | |
166 virtual void reset_after_change(); | |
167 virtual void reset_survivors_after_shrink(); | |
168 | |
169 // Performance Counter support | |
170 void update_counters(); | |
171 | |
172 // Debugging - do not use for time critical operations | |
173 void print() const; | |
174 void print_on(outputStream* st) const; | |
175 void print_used_change(size_t prev_used) const; | |
176 virtual const char* name() const { return "PSYoungGen"; } | |
177 | |
178 void verify(bool allow_dirty); | |
179 | |
180 // Space boundary invariant checker | |
181 void space_invariants() PRODUCT_RETURN; | |
263
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
182 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
183 // Helper for mangling survivor spaces. |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
184 void mangle_survivors(MutableSpace* s1, |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
185 MemRegion s1MR, |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
186 MutableSpace* s2, |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
187 MemRegion s2MR) PRODUCT_RETURN; |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
188 |
12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents:
0
diff
changeset
|
189 void record_spaces_top() PRODUCT_RETURN; |
0 | 190 }; |