1 /* 2 * Copyright (c) 2016, 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/g1/g1CollectedHeap.hpp" 27 #include "gc/g1/g1CollectorPolicy.hpp" 28 #include "gc/g1/g1HeapTransition.hpp" 29 #include "logging/log.hpp" 30 #include "memory/metaspace.hpp" 31 32 G1HeapTransition::Data::Data(G1CollectedHeap* g1_heap) { 33 YoungList* young_list = g1_heap->young_list(); 34 _eden_length = young_list->eden_length(); 35 _survivor_length = young_list->survivor_length(); 36 _old_length = g1_heap->old_regions_count(); 37 _humongous_length = g1_heap->humongous_regions_count(); 38 _metaspace_used_bytes = MetaspaceAux::used_bytes(); 39 } 40 41 G1HeapTransition::G1HeapTransition(G1CollectedHeap* g1_heap) : _g1_heap(g1_heap), _before(g1_heap) { } 42 43 struct SeparatedUsageInfo : public StackObj { 44 size_t _eden_used; 45 size_t _survivor_used; 46 size_t _old_used; 47 size_t _humongous_used; 48 49 size_t _eden_region_count; 50 size_t _survivor_region_count; 51 size_t _old_region_count; 52 size_t _humongous_region_count; 53 54 SeparatedUsageInfo() : 55 _eden_used(0), _survivor_used(0), _old_used(0), _humongous_used(0), 56 _eden_region_count(0), _survivor_region_count(0), _old_region_count(0), _humongous_region_count(0) {} 57 }; 58 59 class SumSeparatedUsedClosure: public HeapRegionClosure { 60 public: 61 SeparatedUsageInfo _info; 62 bool doHeapRegion(HeapRegion* r) { 63 if (r->is_old()) { 64 _info._old_used += r->used(); 65 _info._old_region_count++; 66 } else if (r->is_survivor()) { 67 _info._survivor_used += r->used(); 68 _info._survivor_region_count++; 69 } else if (r->is_eden()) { 70 _info._eden_used += r->used(); 71 _info._eden_region_count++; 72 } else if (r->is_humongous()) { 73 _info._humongous_used += r->used(); 74 _info._humongous_region_count++; 75 } else { 76 assert(r->used() == 0, "Expected used to be 0 but it was " SIZE_FORMAT, r->used()); 77 } 78 return false; 79 } 80 }; 81 82 void G1HeapTransition::print() { 83 Data after(_g1_heap); 84 85 size_t eden_capacity_bytes_after_gc = _g1_heap->g1_policy()->young_list_target_length() - after._survivor_length; 86 size_t survivor_capacity_bytes_after_gc = _g1_heap->g1_policy()->max_survivor_regions(); 87 88 SeparatedUsageInfo usage_info; 89 if (log_is_enabled(Trace, gc, heap)) { 90 SumSeparatedUsedClosure blk; 91 _g1_heap->heap_region_iterate(&blk); 92 usage_info = blk._info; 93 assert(usage_info._eden_region_count == 0, "Expected no eden regions, but got " SIZE_FORMAT, usage_info._eden_region_count); 94 assert(usage_info._survivor_region_count == after._survivor_length, "Expected survivors to be " SIZE_FORMAT " but was " SIZE_FORMAT, 95 after._survivor_length, usage_info._survivor_region_count); 96 assert(usage_info._old_region_count == after._old_length, "Expected old to be " SIZE_FORMAT " but was " SIZE_FORMAT, 97 after._old_length, usage_info._old_region_count); 98 assert(usage_info._humongous_region_count == after._humongous_length, "Expected humongous to be " SIZE_FORMAT " but was " SIZE_FORMAT, 99 after._humongous_length, usage_info._humongous_region_count); 100 } 101 102 log_info(gc, heap)("Eden regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")", 103 _before._eden_length, after._eden_length, eden_capacity_bytes_after_gc); 104 log_trace(gc, heap)(" Used: 0K, Waste: 0K"); 105 106 log_info(gc, heap)("Survivor regions: " SIZE_FORMAT "->" SIZE_FORMAT "(" SIZE_FORMAT ")", 107 _before._survivor_length, after._survivor_length, survivor_capacity_bytes_after_gc); 108 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", 109 usage_info._survivor_used / K, ((after._survivor_length * HeapRegion::GrainBytes) - usage_info._survivor_used) / K); 110 111 log_info(gc, heap)("Old regions: " SIZE_FORMAT "->" SIZE_FORMAT, 112 _before._old_length, after._old_length); 113 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", 114 usage_info._old_used / K, ((after._old_length * HeapRegion::GrainBytes) - usage_info._old_used) / K); 115 116 log_info(gc, heap)("Humongous regions: " SIZE_FORMAT "->" SIZE_FORMAT, 117 _before._humongous_length, after._humongous_length); 118 log_trace(gc, heap)(" Used: " SIZE_FORMAT "K, Waste: " SIZE_FORMAT "K", 119 usage_info._humongous_used / K, ((after._humongous_length * HeapRegion::GrainBytes) - usage_info._humongous_used) / K); 120 121 MetaspaceAux::print_metaspace_change(_before._metaspace_used_bytes); 122 }