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 }