1 /*
2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc_implementation/g1/g1CollectedHeap.hpp"
27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
28 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
29 #include "gc_implementation/g1/heapRegion.hpp"
30 #include "services/g1MemoryPool.hpp"
31
32 G1MemoryPoolSuper::G1MemoryPoolSuper(G1CollectedHeap* g1h,
33 const char* name,
34 size_t init_size,
35 bool support_usage_threshold) :
36 _g1h(g1h), CollectedMemoryPool(name,
37 MemoryPool::Heap,
38 init_size,
39 undefined_max(),
40 support_usage_threshold) {
41 assert(UseG1GC, "sanity");
42 }
43
44 // See the comment at the top of g1MemoryPool.hpp
45 size_t G1MemoryPoolSuper::eden_space_committed(G1CollectedHeap* g1h) {
46 return MAX2(eden_space_used(g1h), (size_t) HeapRegion::GrainBytes);
47 }
48
49 // See the comment at the top of g1MemoryPool.hpp
50 size_t G1MemoryPoolSuper::eden_space_used(G1CollectedHeap* g1h) {
51 size_t young_list_length = g1h->young_list()->length();
52 size_t eden_used = young_list_length * HeapRegion::GrainBytes;
53 size_t survivor_used = survivor_space_used(g1h);
54 eden_used = subtract_up_to_zero(eden_used, survivor_used);
55 return eden_used;
56 }
57
58 // See the comment at the top of g1MemoryPool.hpp
59 size_t G1MemoryPoolSuper::survivor_space_committed(G1CollectedHeap* g1h) {
60 return MAX2(survivor_space_used(g1h), (size_t) HeapRegion::GrainBytes);
61 }
62
63 // See the comment at the top of g1MemoryPool.hpp
64 size_t G1MemoryPoolSuper::survivor_space_used(G1CollectedHeap* g1h) {
65 size_t survivor_num = g1h->g1_policy()->recorded_survivor_regions();
66 size_t survivor_used = survivor_num * HeapRegion::GrainBytes;
67 return survivor_used;
68 }
69
70 // See the comment at the top of g1MemoryPool.hpp
71 size_t G1MemoryPoolSuper::old_space_committed(G1CollectedHeap* g1h) {
72 size_t committed = overall_committed(g1h);
73 size_t eden_committed = eden_space_committed(g1h);
74 size_t survivor_committed = survivor_space_committed(g1h);
75 committed = subtract_up_to_zero(committed, eden_committed);
76 committed = subtract_up_to_zero(committed, survivor_committed);
77 committed = MAX2(committed, (size_t) HeapRegion::GrainBytes);
78 return committed;
79 }
80
81 // See the comment at the top of g1MemoryPool.hpp
82 size_t G1MemoryPoolSuper::old_space_used(G1CollectedHeap* g1h) {
83 size_t used = overall_used(g1h);
84 size_t eden_used = eden_space_used(g1h);
85 size_t survivor_used = survivor_space_used(g1h);
86 used = subtract_up_to_zero(used, eden_used);
87 used = subtract_up_to_zero(used, survivor_used);
88 return used;
89 }
90
91 G1EdenPool::G1EdenPool(G1CollectedHeap* g1h) :
92 G1MemoryPoolSuper(g1h,
93 "G1 Eden",
94 eden_space_committed(g1h), /* init_size */
95 false /* support_usage_threshold */) { }
96
97 MemoryUsage G1EdenPool::get_memory_usage() {
98 size_t initial_sz = initial_size();
99 size_t max_sz = max_size();
100 size_t used = used_in_bytes();
101 size_t committed = eden_space_committed(_g1h);
102
103 return MemoryUsage(initial_sz, used, committed, max_sz);
104 }
105
106 G1SurvivorPool::G1SurvivorPool(G1CollectedHeap* g1h) :
107 G1MemoryPoolSuper(g1h,
108 "G1 Survivor",
109 survivor_space_committed(g1h), /* init_size */
110 false /* support_usage_threshold */) { }
111
112 MemoryUsage G1SurvivorPool::get_memory_usage() {
113 size_t initial_sz = initial_size();
114 size_t max_sz = max_size();
115 size_t used = used_in_bytes();
116 size_t committed = survivor_space_committed(_g1h);
117
118 return MemoryUsage(initial_sz, used, committed, max_sz);
119 }
120
121 G1OldGenPool::G1OldGenPool(G1CollectedHeap* g1h) :
122 G1MemoryPoolSuper(g1h,
123 "G1 Old Gen",
124 old_space_committed(g1h), /* init_size */
125 true /* support_usage_threshold */) { }
126
127 MemoryUsage G1OldGenPool::get_memory_usage() {
128 size_t initial_sz = initial_size();
129 size_t max_sz = max_size();
130 size_t used = used_in_bytes();
131 size_t committed = old_space_committed(_g1h);
132
133 return MemoryUsage(initial_sz, used, committed, max_sz);
134 }