g1MemoryPool.cpp revision 1472:c18cbe5936b8 
1/*
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24
25# include "incls/_precompiled.incl"
26# include "incls/_g1MemoryPool.cpp.incl"
27
28G1MemoryPoolSuper::G1MemoryPoolSuper(G1CollectedHeap* g1h,
29                                     const char* name,
30                                     size_t init_size,
31                                     size_t max_size,
32                                     bool support_usage_threshold) :
33  _g1h(g1h), CollectedMemoryPool(name,
34                                 MemoryPool::Heap,
35                                 init_size,
36                                 max_size,
37                                 support_usage_threshold) {
38  assert(UseG1GC, "sanity");
39}
40
41// See the comment at the top of g1MemoryPool.hpp
42size_t G1MemoryPoolSuper::eden_space_committed(G1CollectedHeap* g1h) {
43  return MAX2(eden_space_used(g1h), (size_t) HeapRegion::GrainBytes);
44}
45
46// See the comment at the top of g1MemoryPool.hpp
47size_t G1MemoryPoolSuper::eden_space_used(G1CollectedHeap* g1h) {
48  size_t young_list_length = g1h->young_list()->length();
49  size_t eden_used = young_list_length * HeapRegion::GrainBytes;
50  size_t survivor_used = survivor_space_used(g1h);
51  eden_used = subtract_up_to_zero(eden_used, survivor_used);
52  return eden_used;
53}
54
55// See the comment at the top of g1MemoryPool.hpp
56size_t G1MemoryPoolSuper::eden_space_max(G1CollectedHeap* g1h) {
57  // This should ensure that it returns a value no smaller than the
58  // region size. Currently, eden_space_committed() guarantees that.
59  return eden_space_committed(g1h);
60}
61
62// See the comment at the top of g1MemoryPool.hpp
63size_t G1MemoryPoolSuper::survivor_space_committed(G1CollectedHeap* g1h) {
64  return MAX2(survivor_space_used(g1h), (size_t) HeapRegion::GrainBytes);
65}
66
67// See the comment at the top of g1MemoryPool.hpp
68size_t G1MemoryPoolSuper::survivor_space_used(G1CollectedHeap* g1h) {
69  size_t survivor_num = g1h->g1_policy()->recorded_survivor_regions();
70  size_t survivor_used = survivor_num * HeapRegion::GrainBytes;
71  return survivor_used;
72}
73
74// See the comment at the top of g1MemoryPool.hpp
75size_t G1MemoryPoolSuper::survivor_space_max(G1CollectedHeap* g1h) {
76  // This should ensure that it returns a value no smaller than the
77  // region size. Currently, survivor_space_committed() guarantees that.
78  return survivor_space_committed(g1h);
79}
80
81// See the comment at the top of g1MemoryPool.hpp
82size_t G1MemoryPoolSuper::old_space_committed(G1CollectedHeap* g1h) {
83  size_t committed = overall_committed(g1h);
84  size_t eden_committed = eden_space_committed(g1h);
85  size_t survivor_committed = survivor_space_committed(g1h);
86  committed = subtract_up_to_zero(committed, eden_committed);
87  committed = subtract_up_to_zero(committed, survivor_committed);
88  committed = MAX2(committed, (size_t) HeapRegion::GrainBytes);
89  return committed;
90}
91
92// See the comment at the top of g1MemoryPool.hpp
93size_t G1MemoryPoolSuper::old_space_used(G1CollectedHeap* g1h) {
94  size_t used = overall_used(g1h);
95  size_t eden_used = eden_space_used(g1h);
96  size_t survivor_used = survivor_space_used(g1h);
97  used = subtract_up_to_zero(used, eden_used);
98  used = subtract_up_to_zero(used, survivor_used);
99  return used;
100}
101
102// See the comment at the top of g1MemoryPool.hpp
103size_t G1MemoryPoolSuper::old_space_max(G1CollectedHeap* g1h) {
104  size_t max = overall_max(g1h);
105  size_t eden_max = eden_space_max(g1h);
106  size_t survivor_max = survivor_space_max(g1h);
107  max = subtract_up_to_zero(max, eden_max);
108  max = subtract_up_to_zero(max, survivor_max);
109  max = MAX2(max, (size_t) HeapRegion::GrainBytes);
110  return max;
111}
112
113G1EdenPool::G1EdenPool(G1CollectedHeap* g1h) :
114  G1MemoryPoolSuper(g1h,
115                    "G1 Eden",
116                    eden_space_committed(g1h), /* init_size */
117                    eden_space_max(g1h), /* max_size */
118                    false /* support_usage_threshold */) {
119}
120
121MemoryUsage G1EdenPool::get_memory_usage() {
122  size_t initial_sz = initial_size();
123  size_t max_sz     = max_size();
124  size_t used       = used_in_bytes();
125  size_t committed  = eden_space_committed(_g1h);
126
127  return MemoryUsage(initial_sz, used, committed, max_sz);
128}
129
130G1SurvivorPool::G1SurvivorPool(G1CollectedHeap* g1h) :
131  G1MemoryPoolSuper(g1h,
132                    "G1 Survivor",
133                    survivor_space_committed(g1h), /* init_size */
134                    survivor_space_max(g1h), /* max_size */
135                    false /* support_usage_threshold */) {
136}
137
138MemoryUsage G1SurvivorPool::get_memory_usage() {
139  size_t initial_sz = initial_size();
140  size_t max_sz     = max_size();
141  size_t used       = used_in_bytes();
142  size_t committed  = survivor_space_committed(_g1h);
143
144  return MemoryUsage(initial_sz, used, committed, max_sz);
145}
146
147G1OldGenPool::G1OldGenPool(G1CollectedHeap* g1h) :
148  G1MemoryPoolSuper(g1h,
149                    "G1 Old Gen",
150                    old_space_committed(g1h), /* init_size */
151                    old_space_max(g1h), /* max_size */
152                    true /* support_usage_threshold */) {
153}
154
155MemoryUsage G1OldGenPool::get_memory_usage() {
156  size_t initial_sz = initial_size();
157  size_t max_sz     = max_size();
158  size_t used       = used_in_bytes();
159  size_t committed  = old_space_committed(_g1h);
160
161  return MemoryUsage(initial_sz, used, committed, max_sz);
162}
163