1 /* 2 * Copyright (c) 2007, 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/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp" 27 #include "gc_implementation/concurrentMarkSweep/cmsCollectorPolicy.hpp" 28 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp" 29 #include "gc_implementation/parNew/parNewGeneration.hpp" 30 #include "gc_implementation/shared/gcPolicyCounters.hpp" 31 #include "gc_implementation/shared/vmGCOperations.hpp" 32 #include "memory/cardTableRS.hpp" 33 #include "memory/collectorPolicy.hpp" 34 #include "memory/gcLocker.inline.hpp" 35 #include "memory/genCollectedHeap.hpp" 36 #include "memory/generationSpec.hpp" 37 #include "memory/space.hpp" 38 #include "memory/universe.hpp" 39 #include "runtime/arguments.hpp" 40 #include "runtime/globals_extension.hpp" 41 #include "runtime/handles.inline.hpp" 42 #include "runtime/java.hpp" 43 #include "runtime/thread.inline.hpp" 44 #include "runtime/vmThread.hpp" 45 46 // 47 // ConcurrentMarkSweepPolicy methods 48 // 49 50 void ConcurrentMarkSweepPolicy::initialize_alignments() { 51 _space_alignment = _gen_alignment = (uintx)Generation::GenGrain; 52 _heap_alignment = compute_heap_alignment(); 53 } 54 55 void ConcurrentMarkSweepPolicy::initialize_generations() { 56 _generations = NEW_C_HEAP_ARRAY3(GenerationSpecPtr, number_of_generations(), mtGC, 0, AllocFailStrategy::RETURN_NULL); 57 if (_generations == NULL) 58 vm_exit_during_initialization("Unable to allocate gen spec"); 59 60 if (UseParNewGC) { 61 if (UseAdaptiveSizePolicy) { 62 _generations[0] = new GenerationSpec(Generation::ASParNew, 63 _initial_young_size, _max_young_size); 64 } else { 65 _generations[0] = new GenerationSpec(Generation::ParNew, 66 _initial_young_size, _max_young_size); 67 } 68 } else { 69 _generations[0] = new GenerationSpec(Generation::DefNew, 70 _initial_young_size, _max_young_size); 71 } 72 if (UseAdaptiveSizePolicy) { 73 _generations[1] = new GenerationSpec(Generation::ASConcurrentMarkSweep, 74 _initial_old_size, _max_old_size); 75 } else { 76 _generations[1] = new GenerationSpec(Generation::ConcurrentMarkSweep, 77 _initial_old_size, _max_old_size); 78 } 79 80 if (_generations[0] == NULL || _generations[1] == NULL) { 81 vm_exit_during_initialization("Unable to allocate gen spec"); 82 } 83 } 84 85 void ConcurrentMarkSweepPolicy::initialize_size_policy(size_t init_eden_size, 86 size_t init_promo_size, 87 size_t init_survivor_size) { 88 double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0; 89 double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0; 90 _size_policy = new CMSAdaptiveSizePolicy(init_eden_size, 91 init_promo_size, 92 init_survivor_size, 93 max_gc_minor_pause_sec, 94 max_gc_pause_sec, 95 GCTimeRatio); 96 } 97 98 void ConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { 99 // initialize the policy counters - 2 collectors, 3 generations 100 if (UseParNewGC) { 101 _gc_policy_counters = new GCPolicyCounters("ParNew:CMS", 2, 3); 102 } 103 else { 104 _gc_policy_counters = new GCPolicyCounters("Copy:CMS", 2, 3); 105 } 106 } 107 108 // Returns true if the incremental mode is enabled. 109 bool ConcurrentMarkSweepPolicy::has_soft_ended_eden() 110 { 111 return CMSIncrementalMode; 112 } 113 114 115 // 116 // ASConcurrentMarkSweepPolicy methods 117 // 118 119 void ASConcurrentMarkSweepPolicy::initialize_gc_policy_counters() { 120 121 assert(size_policy() != NULL, "A size policy is required"); 122 // initialize the policy counters - 2 collectors, 3 generations 123 if (UseParNewGC) { 124 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("ParNew:CMS", 2, 3, 125 size_policy()); 126 } 127 else { 128 _gc_policy_counters = new CMSGCAdaptivePolicyCounters("Copy:CMS", 2, 3, 129 size_policy()); 130 } 131 }