1 /* 2 * Copyright (c) 2013, 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/concurrentG1Refine.hpp" 27 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" 28 #include "gc_implementation/g1/heapRegion.hpp" 29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" 30 #include "gc_implementation/g1/g1RemSet.inline.hpp" 31 #include "gc_implementation/g1/g1RemSetSummary.hpp" 32 #include "gc_implementation/g1/heapRegionRemSet.hpp" 33 #include "runtime/thread.inline.hpp" 34 35 class GetRSThreadVTimeClosure : public ThreadClosure { 36 private: 37 G1RemSetSummary* _summary; 38 uint _counter; 39 40 public: 41 GetRSThreadVTimeClosure(G1RemSetSummary * summary) : ThreadClosure(), _summary(summary), _counter(0) { 42 assert(_summary != NULL, "just checking"); 43 } 44 45 virtual void do_thread(Thread* t) { 46 ConcurrentG1RefineThread* crt = (ConcurrentG1RefineThread*) t; 47 _summary->set_rs_thread_vtime(_counter, crt->vtime_accum()); 48 _counter++; 49 } 50 }; 51 52 void G1RemSetSummary::update() { 53 _num_refined_cards = remset()->conc_refine_cards(); 54 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); 55 _num_processed_buf_mutator = dcqs.processed_buffers_mut(); 56 _num_processed_buf_rs_threads = dcqs.processed_buffers_rs_thread(); 57 58 _num_coarsenings = HeapRegionRemSet::n_coarsenings(); 59 60 ConcurrentG1Refine * cg1r = G1CollectedHeap::heap()->concurrent_g1_refine(); 61 if (_rs_threads_vtimes != NULL) { 62 GetRSThreadVTimeClosure p(this); 63 cg1r->worker_threads_do(&p); 64 } 65 set_sampling_thread_vtime(cg1r->sampling_thread()->vtime_accum()); 66 } 67 68 void G1RemSetSummary::set_rs_thread_vtime(uint thread, double value) { 69 assert(_rs_threads_vtimes != NULL, "just checking"); 70 assert(thread < _num_vtimes, "just checking"); 71 _rs_threads_vtimes[thread] = value; 72 } 73 74 double G1RemSetSummary::rs_thread_vtime(uint thread) const { 75 assert(_rs_threads_vtimes != NULL, "just checking"); 76 assert(thread < _num_vtimes, "just checking"); 77 return _rs_threads_vtimes[thread]; 78 } 79 80 void G1RemSetSummary::initialize(G1RemSet* remset, uint num_workers) { 81 assert(_rs_threads_vtimes == NULL, "just checking"); 82 assert(remset != NULL, "just checking"); 83 84 _remset = remset; 85 _num_vtimes = num_workers; 86 _rs_threads_vtimes = NEW_C_HEAP_ARRAY(double, _num_vtimes, mtGC); 87 memset(_rs_threads_vtimes, 0, sizeof(double) * _num_vtimes); 88 89 update(); 90 } 91 92 void G1RemSetSummary::set(G1RemSetSummary* other) { 93 assert(other != NULL, "just checking"); 94 assert(remset() == other->remset(), "just checking"); 95 assert(_num_vtimes == other->_num_vtimes, "just checking"); 96 97 _num_refined_cards = other->num_concurrent_refined_cards(); 98 99 _num_processed_buf_mutator = other->num_processed_buf_mutator(); 100 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads(); 101 102 _num_coarsenings = other->_num_coarsenings; 103 104 memcpy(_rs_threads_vtimes, other->_rs_threads_vtimes, sizeof(double) * _num_vtimes); 105 106 set_sampling_thread_vtime(other->sampling_thread_vtime()); 107 } 108 109 void G1RemSetSummary::subtract_from(G1RemSetSummary* other) { 110 assert(other != NULL, "just checking"); 111 assert(remset() == other->remset(), "just checking"); 112 assert(_num_vtimes == other->_num_vtimes, "just checking"); 113 114 _num_refined_cards = other->num_concurrent_refined_cards() - _num_refined_cards; 115 116 _num_processed_buf_mutator = other->num_processed_buf_mutator() - _num_processed_buf_mutator; 117 _num_processed_buf_rs_threads = other->num_processed_buf_rs_threads() - _num_processed_buf_rs_threads; 118 119 _num_coarsenings = other->num_coarsenings() - _num_coarsenings; 120 121 for (uint i = 0; i < _num_vtimes; i++) { 122 set_rs_thread_vtime(i, other->rs_thread_vtime(i) - rs_thread_vtime(i)); 123 } 124 125 _sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime; 126 } 127 128 class HRRSStatsIter: public HeapRegionClosure { 129 size_t _occupied; 130 size_t _total_mem_sz; 131 size_t _max_mem_sz; 132 HeapRegion* _max_mem_sz_region; 133 public: 134 HRRSStatsIter() : 135 _occupied(0), 136 _total_mem_sz(0), 137 _max_mem_sz(0), 138 _max_mem_sz_region(NULL) 139 {} 140 141 bool doHeapRegion(HeapRegion* r) { 142 size_t mem_sz = r->rem_set()->mem_size(); 143 if (mem_sz > _max_mem_sz) { 144 _max_mem_sz = mem_sz; 145 _max_mem_sz_region = r; 146 } 147 _total_mem_sz += mem_sz; 148 size_t occ = r->rem_set()->occupied(); 149 _occupied += occ; 150 return false; 151 } 152 size_t total_mem_sz() { return _total_mem_sz; } 153 size_t max_mem_sz() { return _max_mem_sz; } 154 size_t occupied() { return _occupied; } 155 HeapRegion* max_mem_sz_region() { return _max_mem_sz_region; } 156 }; 157 158 double calc_percentage(size_t numerator, size_t denominator) { 159 if (denominator != 0) { 160 return (double)numerator / denominator * 100.0; 161 } else { 162 return 0.0f; 163 } 164 } 165 166 void G1RemSetSummary::print_on(outputStream* out) { 167 out->print_cr("\n Concurrent RS processed "SIZE_FORMAT" cards", 168 num_concurrent_refined_cards()); 169 out->print_cr(" Of %d completed buffers:", num_processed_buf_total()); 170 out->print_cr(" %8d (%5.1f%%) by concurrent RS threads.", 171 num_processed_buf_total(), 172 calc_percentage(num_processed_buf_rs_threads(), num_processed_buf_total())); 173 out->print_cr(" %8d (%5.1f%%) by mutator threads.", 174 num_processed_buf_mutator(), 175 calc_percentage(num_processed_buf_mutator(), num_processed_buf_total())); 176 out->print_cr(" Concurrent RS threads times (s)"); 177 out->print(" "); 178 for (uint i = 0; i < _num_vtimes; i++) { 179 out->print(" %5.2f", rs_thread_vtime(i)); 180 } 181 out->cr(); 182 out->print_cr(" Concurrent sampling threads times (s)"); 183 out->print_cr(" %5.2f", sampling_thread_vtime()); 184 185 HRRSStatsIter blk; 186 G1CollectedHeap::heap()->heap_region_iterate(&blk); 187 out->print_cr(" Total heap region rem set sizes = "SIZE_FORMAT"K." 188 " Max = "SIZE_FORMAT"K.", 189 blk.total_mem_sz()/K, blk.max_mem_sz()/K); 190 out->print_cr(" Static structures = "SIZE_FORMAT"K," 191 " free_lists = "SIZE_FORMAT"K.", 192 HeapRegionRemSet::static_mem_size() / K, 193 HeapRegionRemSet::fl_mem_size() / K); 194 out->print_cr(" "SIZE_FORMAT" occupied cards represented.", 195 blk.occupied()); 196 HeapRegion* max_mem_sz_region = blk.max_mem_sz_region(); 197 HeapRegionRemSet* rem_set = max_mem_sz_region->rem_set(); 198 out->print_cr(" Max size region = "HR_FORMAT", " 199 "size = "SIZE_FORMAT "K, occupied = "SIZE_FORMAT"K.", 200 HR_FORMAT_PARAMS(max_mem_sz_region), 201 (rem_set->mem_size() + K - 1)/K, 202 (rem_set->occupied() + K - 1)/K); 203 204 out->print_cr(" Did %d coarsenings.", num_coarsenings()); 205 }