1 /*
2 * Copyright (c) 2013, 2019, Red Hat, Inc. 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/shenandoah/shenandoahMemoryPool.hpp"
27 #include "gc/shenandoah/shenandoahYoungGeneration.hpp"
28 #include "gc/shenandoah/shenandoahOldGeneration.hpp"
29
30 ShenandoahMemoryPool::ShenandoahMemoryPool(ShenandoahHeap* heap,
31 const char* name) :
32 CollectedMemoryPool(name,
33 heap->initial_capacity(),
34 heap->max_capacity(),
35 true /* support_usage_threshold */),
36 _heap(heap) {}
37
38 ShenandoahMemoryPool::ShenandoahMemoryPool(ShenandoahHeap* heap,
39 const char* name,
40 size_t initial_capacity,
41 size_t max_capacity) :
42 CollectedMemoryPool(name,
43 initial_capacity,
44 max_capacity,
45 true /* support_usage_threshold */),
46 _heap(heap) {}
47
48
49 MemoryUsage ShenandoahMemoryPool::get_memory_usage() {
50 size_t initial = initial_size();
51 size_t max = max_size();
52 size_t used = used_in_bytes();
53 size_t committed = _heap->committed();
54
55 // These asserts can never fail: max is stable, and all updates to other values never overflow max.
56 assert(initial <= max, "initial: " SIZE_FORMAT ", max: " SIZE_FORMAT, initial, max);
57 assert(used <= max, "used: " SIZE_FORMAT ", max: " SIZE_FORMAT, used, max);
58 assert(committed <= max, "committed: " SIZE_FORMAT ", max: " SIZE_FORMAT, committed, max);
59
60 // Committed and used are updated concurrently and independently. They can momentarily break
61 // the assert below, which would also fail in downstream code. To avoid that, adjust values
62 // to make sense under the race. See JDK-8207200.
63 committed = MAX2(used, committed);
64 assert(used <= committed, "used: " SIZE_FORMAT ", committed: " SIZE_FORMAT, used, committed);
65
66 return MemoryUsage(initial, used, committed, max);
67 }
68
69 size_t ShenandoahMemoryPool::used_in_bytes() {
70 return _heap->used();
71 }
72
73 size_t ShenandoahMemoryPool::max_size() const {
74 return _heap->max_capacity();
75 }
76
77 ShenandoahYoungGenMemoryPool::ShenandoahYoungGenMemoryPool(ShenandoahHeap* heap) :
78 ShenandoahMemoryPool(heap,
79 "Shenandoah Young Gen",
80 0,
81 heap->max_capacity()) { }
82
83 MemoryUsage ShenandoahYoungGenMemoryPool::get_memory_usage() {
84 size_t initial = initial_size();
85 size_t max = max_size();
86 size_t used = used_in_bytes();
87 size_t committed = _heap->young_generation()->used_regions_size();
88
89 return MemoryUsage(initial, used, committed, max);
90 }
91
92 size_t ShenandoahYoungGenMemoryPool::used_in_bytes() {
93 return _heap->young_generation()->used();
94 }
95
96 size_t ShenandoahYoungGenMemoryPool::max_size() const {
97 return _heap->young_generation()->max_capacity();
98 }
99
100 ShenandoahOldGenMemoryPool::ShenandoahOldGenMemoryPool(ShenandoahHeap* heap) :
101 ShenandoahMemoryPool(heap,
102 "Shenandoah Old Gen",
103 0,
104 heap->max_capacity()) { }
105
106 MemoryUsage ShenandoahOldGenMemoryPool::get_memory_usage() {
107 size_t initial = initial_size();
108 size_t max = max_size();
109 size_t used = used_in_bytes();
110 size_t committed = _heap->old_generation()->used_regions_size();
111
112 return MemoryUsage(initial, used, committed, max);
113 }
114
115 size_t ShenandoahOldGenMemoryPool::used_in_bytes() {
116 return _heap->old_generation()->used();
117 }
118
119 size_t ShenandoahOldGenMemoryPool::max_size() const {
120 return _heap->old_generation()->max_capacity();
121 }