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1 /* |
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 #include "precompiled.hpp" |
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25 |
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26 #include "runtime/atomic.hpp" |
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27 #include "runtime/interfaceSupport.hpp" |
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28 #include "runtime/mutexLocker.hpp" |
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29 #include "runtime/safepoint.hpp" |
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30 #include "runtime/threadCritical.hpp" |
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31 #include "services/memPtr.hpp" |
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32 #include "services/memReporter.hpp" |
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33 #include "services/memTracker.hpp" |
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34 #include "utilities/decoder.hpp" |
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35 #include "utilities/globalDefinitions.hpp" |
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36 |
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37 bool NMT_track_callsite = false; |
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38 |
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39 // walk all 'known' threads at NMT sync point, and collect their recorders |
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40 void SyncThreadRecorderClosure::do_thread(Thread* thread) { |
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41 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); |
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42 if (thread->is_Java_thread()) { |
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43 JavaThread* javaThread = (JavaThread*)thread; |
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44 MemRecorder* recorder = javaThread->get_recorder(); |
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45 if (recorder != NULL) { |
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46 MemTracker::enqueue_pending_recorder(recorder); |
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47 javaThread->set_recorder(NULL); |
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48 } |
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49 } |
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50 _thread_count ++; |
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51 } |
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52 |
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53 |
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54 MemRecorder* MemTracker::_global_recorder = NULL; |
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55 MemSnapshot* MemTracker::_snapshot = NULL; |
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56 MemBaseline MemTracker::_baseline; |
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57 Mutex MemTracker::_query_lock(Monitor::native, "NMT_queryLock"); |
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58 volatile MemRecorder* MemTracker::_merge_pending_queue = NULL; |
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59 volatile MemRecorder* MemTracker::_pooled_recorders = NULL; |
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60 MemTrackWorker* MemTracker::_worker_thread = NULL; |
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61 int MemTracker::_sync_point_skip_count = 0; |
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62 MemTracker::NMTLevel MemTracker::_tracking_level = MemTracker::NMT_off; |
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63 volatile MemTracker::NMTStates MemTracker::_state = NMT_uninited; |
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64 MemTracker::ShutdownReason MemTracker::_reason = NMT_shutdown_none; |
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65 int MemTracker::_thread_count = 255; |
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66 volatile jint MemTracker::_pooled_recorder_count = 0; |
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67 debug_only(intx MemTracker::_main_thread_tid = 0;) |
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68 debug_only(volatile jint MemTracker::_pending_recorder_count = 0;) |
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69 |
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70 void MemTracker::init_tracking_options(const char* option_line) { |
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71 _tracking_level = NMT_off; |
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72 if (strncmp(option_line, "=summary", 8) == 0) { |
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73 _tracking_level = NMT_summary; |
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74 } else if (strncmp(option_line, "=detail", 8) == 0) { |
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75 _tracking_level = NMT_detail; |
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76 } |
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77 } |
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78 |
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79 // first phase of bootstrapping, when VM is still in single-threaded mode. |
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80 void MemTracker::bootstrap_single_thread() { |
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81 if (_tracking_level > NMT_off) { |
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82 assert(_state == NMT_uninited, "wrong state"); |
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83 |
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84 // NMT is not supported with UseMallocOnly is on. NMT can NOT |
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85 // handle the amount of malloc data without significantly impacting |
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86 // runtime performance when this flag is on. |
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87 if (UseMallocOnly) { |
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88 shutdown(NMT_use_malloc_only); |
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89 return; |
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90 } |
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91 |
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92 debug_only(_main_thread_tid = os::current_thread_id();) |
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93 _state = NMT_bootstrapping_single_thread; |
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94 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); |
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95 } |
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96 } |
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97 |
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98 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. |
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99 void MemTracker::bootstrap_multi_thread() { |
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100 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { |
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101 // create nmt lock for multi-thread execution |
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102 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); |
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103 _state = NMT_bootstrapping_multi_thread; |
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104 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); |
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105 } |
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106 } |
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107 |
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108 // fully start nmt |
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109 void MemTracker::start() { |
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110 // Native memory tracking is off from command line option |
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111 if (_tracking_level == NMT_off || shutdown_in_progress()) return; |
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112 |
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113 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); |
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114 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); |
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115 |
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116 _snapshot = new (std::nothrow)MemSnapshot(); |
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117 if (_snapshot != NULL && !_snapshot->out_of_memory()) { |
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118 if (start_worker()) { |
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119 _state = NMT_started; |
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120 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); |
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121 return; |
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122 } |
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123 } |
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124 |
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125 // fail to start native memory tracking, shut it down |
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126 shutdown(NMT_initialization); |
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127 } |
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128 |
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129 /** |
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130 * Shutting down native memory tracking. |
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131 * We can not shutdown native memory tracking immediately, so we just |
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132 * setup shutdown pending flag, every native memory tracking component |
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133 * should orderly shut itself down. |
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134 * |
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135 * The shutdown sequences: |
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136 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state |
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137 * 2. Worker thread calls MemTracker::final_shutdown(), which transites |
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138 * MemTracker to final shutdown state. |
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139 * 3. At sync point, MemTracker does final cleanup, before sets memory |
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140 * tracking level to off to complete shutdown. |
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141 */ |
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142 void MemTracker::shutdown(ShutdownReason reason) { |
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143 if (_tracking_level == NMT_off) return; |
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144 |
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145 if (_state <= NMT_bootstrapping_single_thread) { |
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146 // we still in single thread mode, there is not contention |
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147 _state = NMT_shutdown_pending; |
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148 _reason = reason; |
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149 } else { |
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150 // we want to know who initialized shutdown |
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151 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, |
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152 (jint*)&_state, (jint)NMT_started)) { |
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153 _reason = reason; |
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154 } |
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155 } |
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156 } |
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157 |
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158 // final phase of shutdown |
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159 void MemTracker::final_shutdown() { |
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160 // delete all pending recorders and pooled recorders |
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161 delete_all_pending_recorders(); |
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162 delete_all_pooled_recorders(); |
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163 |
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164 { |
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165 // shared baseline and snapshot are the only objects needed to |
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166 // create query results |
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167 MutexLockerEx locker(&_query_lock, true); |
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168 // cleanup baseline data and snapshot |
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169 _baseline.clear(); |
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170 delete _snapshot; |
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171 _snapshot = NULL; |
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172 } |
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173 |
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174 // shutdown shared decoder instance, since it is only |
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175 // used by native memory tracking so far. |
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176 Decoder::shutdown(); |
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177 |
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178 MemTrackWorker* worker = NULL; |
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179 { |
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180 ThreadCritical tc; |
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181 // can not delete worker inside the thread critical |
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182 if (_worker_thread != NULL && Thread::current() == _worker_thread) { |
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183 worker = _worker_thread; |
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184 _worker_thread = NULL; |
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185 } |
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186 } |
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187 if (worker != NULL) { |
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188 delete worker; |
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189 } |
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190 _state = NMT_final_shutdown; |
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191 } |
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192 |
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193 // delete all pooled recorders |
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194 void MemTracker::delete_all_pooled_recorders() { |
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195 // free all pooled recorders |
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196 volatile MemRecorder* cur_head = _pooled_recorders; |
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197 if (cur_head != NULL) { |
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198 MemRecorder* null_ptr = NULL; |
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199 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, |
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200 (void*)&_pooled_recorders, (void*)cur_head)) { |
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201 cur_head = _pooled_recorders; |
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202 } |
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203 if (cur_head != NULL) { |
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204 delete cur_head; |
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205 _pooled_recorder_count = 0; |
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206 } |
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207 } |
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208 } |
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209 |
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210 // delete all recorders in pending queue |
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211 void MemTracker::delete_all_pending_recorders() { |
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212 // free all pending recorders |
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213 MemRecorder* pending_head = get_pending_recorders(); |
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214 if (pending_head != NULL) { |
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215 delete pending_head; |
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216 } |
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217 } |
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218 |
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219 /* |
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220 * retrieve per-thread recorder of specified thread. |
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221 * if thread == NULL, it means global recorder |
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222 */ |
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223 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { |
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224 if (shutdown_in_progress()) return NULL; |
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225 |
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226 MemRecorder* rc; |
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227 if (thread == NULL) { |
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228 rc = _global_recorder; |
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229 } else { |
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230 rc = thread->get_recorder(); |
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231 } |
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232 |
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233 if (rc != NULL && rc->is_full()) { |
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234 enqueue_pending_recorder(rc); |
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235 rc = NULL; |
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236 } |
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237 |
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238 if (rc == NULL) { |
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239 rc = get_new_or_pooled_instance(); |
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240 if (thread == NULL) { |
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241 _global_recorder = rc; |
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242 } else { |
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243 thread->set_recorder(rc); |
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244 } |
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245 } |
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246 return rc; |
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247 } |
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248 |
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249 /* |
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250 * get a per-thread recorder from pool, or create a new one if |
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251 * there is not one available. |
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252 */ |
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253 MemRecorder* MemTracker::get_new_or_pooled_instance() { |
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254 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); |
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255 if (cur_head == NULL) { |
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256 MemRecorder* rec = new (std::nothrow)MemRecorder(); |
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257 if (rec == NULL || rec->out_of_memory()) { |
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258 shutdown(NMT_out_of_memory); |
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259 if (rec != NULL) { |
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260 delete rec; |
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261 rec = NULL; |
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262 } |
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263 } |
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264 return rec; |
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265 } else { |
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266 MemRecorder* next_head = cur_head->next(); |
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267 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, |
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268 (void*)cur_head)) { |
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269 return get_new_or_pooled_instance(); |
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270 } |
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271 cur_head->set_next(NULL); |
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272 Atomic::dec(&_pooled_recorder_count); |
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273 debug_only(cur_head->set_generation();) |
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274 return cur_head; |
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275 } |
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276 } |
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277 |
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278 /* |
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279 * retrieve all recorders in pending queue, and empty the queue |
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280 */ |
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281 MemRecorder* MemTracker::get_pending_recorders() { |
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282 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); |
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283 MemRecorder* null_ptr = NULL; |
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284 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, |
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285 (void*)cur_head)) { |
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286 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); |
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287 } |
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288 debug_only(Atomic::store(0, &_pending_recorder_count)); |
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289 return cur_head; |
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290 } |
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291 |
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292 /* |
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293 * release a recorder to recorder pool. |
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294 */ |
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295 void MemTracker::release_thread_recorder(MemRecorder* rec) { |
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296 assert(rec != NULL, "null recorder"); |
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297 // we don't want to pool too many recorders |
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298 rec->set_next(NULL); |
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299 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { |
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300 delete rec; |
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301 return; |
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302 } |
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303 |
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304 rec->clear(); |
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305 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); |
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306 rec->set_next(cur_head); |
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307 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, |
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308 (void*)cur_head)) { |
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309 cur_head = const_cast<MemRecorder*>(_pooled_recorders); |
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310 rec->set_next(cur_head); |
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311 } |
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312 Atomic::inc(&_pooled_recorder_count); |
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313 } |
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314 |
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315 /* |
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316 * This is the most important method in whole nmt implementation. |
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317 * |
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318 * Create a memory record. |
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319 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM |
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320 * still in single thread mode. |
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321 * 2. For all threads other than JavaThread, ThreadCritical is needed |
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322 * to write to recorders to global recorder. |
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323 * 3. For JavaThreads that are not longer visible by safepoint, also |
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324 * need to take ThreadCritical and records are written to global |
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325 * recorders, since these threads are NOT walked by Threads.do_thread(). |
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326 * 4. JavaThreads that are running in native state, have to transition |
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327 * to VM state before writing to per-thread recorders. |
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328 * 5. JavaThreads that are running in VM state do not need any lock and |
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329 * records are written to per-thread recorders. |
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330 * 6. For a thread has yet to attach VM 'Thread', they need to take |
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331 * ThreadCritical to write to global recorder. |
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332 * |
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333 * Important note: |
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334 * NO LOCK should be taken inside ThreadCritical lock !!! |
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335 */ |
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336 void MemTracker::create_memory_record(address addr, MEMFLAGS flags, |
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337 size_t size, address pc, Thread* thread) { |
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338 if (!shutdown_in_progress()) { |
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339 // single thread, we just write records direct to global recorder,' |
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340 // with any lock |
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341 if (_state == NMT_bootstrapping_single_thread) { |
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342 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); |
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343 thread = NULL; |
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344 } else { |
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345 if (thread == NULL) { |
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346 // don't use Thread::current(), since it is possible that |
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347 // the calling thread has yet to attach to VM 'Thread', |
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348 // which will result assertion failure |
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349 thread = ThreadLocalStorage::thread(); |
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350 } |
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351 } |
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352 |
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353 if (thread != NULL) { |
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354 #ifdef ASSERT |
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355 // cause assertion on stack base. This ensures that threads call |
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356 // Thread::record_stack_base_and_size() method, which will create |
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357 // thread native stack records. |
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358 thread->stack_base(); |
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359 #endif |
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360 // for a JavaThread, if it is running in native state, we need to transition it to |
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361 // VM state, so it can stop at safepoint. JavaThread running in VM state does not |
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362 // need lock to write records. |
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363 if (thread->is_Java_thread() && ((JavaThread*)thread)->is_safepoint_visible()) { |
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364 if (((JavaThread*)thread)->thread_state() == _thread_in_native) { |
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365 ThreadInVMfromNative trans((JavaThread*)thread); |
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366 create_record_in_recorder(addr, flags, size, pc, thread); |
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367 } else { |
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368 create_record_in_recorder(addr, flags, size, pc, thread); |
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369 } |
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370 } else { |
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371 // other threads, such as worker and watcher threads, etc. need to |
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372 // take ThreadCritical to write to global recorder |
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373 ThreadCritical tc; |
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374 create_record_in_recorder(addr, flags, size, pc, NULL); |
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375 } |
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376 } else { |
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377 if (_state == NMT_bootstrapping_single_thread) { |
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378 // single thread, no lock needed |
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379 create_record_in_recorder(addr, flags, size, pc, NULL); |
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380 } else { |
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381 // for thread has yet to attach VM 'Thread', we can not use VM mutex. |
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382 // use native thread critical instead |
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383 ThreadCritical tc; |
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384 create_record_in_recorder(addr, flags, size, pc, NULL); |
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385 } |
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386 } |
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387 } |
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388 } |
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389 |
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390 // write a record to proper recorder. No lock can be taken from this method |
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391 // down. |
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392 void MemTracker::create_record_in_recorder(address addr, MEMFLAGS flags, |
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393 size_t size, address pc, Thread* thread) { |
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394 assert(thread == NULL || thread->is_Java_thread(), "wrong thread"); |
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395 |
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396 MemRecorder* rc = get_thread_recorder((JavaThread*)thread); |
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397 if (rc != NULL) { |
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398 rc->record(addr, flags, size, pc); |
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399 } |
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400 } |
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401 |
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402 /** |
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403 * enqueue a recorder to pending queue |
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404 */ |
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405 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { |
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406 assert(rec != NULL, "null recorder"); |
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407 |
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408 // we are shutting down, so just delete it |
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409 if (shutdown_in_progress()) { |
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410 rec->set_next(NULL); |
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411 delete rec; |
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412 return; |
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413 } |
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414 |
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415 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); |
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416 rec->set_next(cur_head); |
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417 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, |
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418 (void*)cur_head)) { |
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419 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); |
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420 rec->set_next(cur_head); |
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421 } |
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422 debug_only(Atomic::inc(&_pending_recorder_count);) |
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423 } |
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424 |
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425 /* |
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426 * The method is called at global safepoint |
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427 * during it synchronization process. |
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428 * 1. enqueue all JavaThreads' per-thread recorders |
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429 * 2. enqueue global recorder |
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430 * 3. retrieve all pending recorders |
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431 * 4. reset global sequence number generator |
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432 * 5. call worker's sync |
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433 */ |
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434 #define MAX_SAFEPOINTS_TO_SKIP 128 |
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435 #define SAFE_SEQUENCE_THRESHOLD 30 |
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436 #define HIGH_GENERATION_THRESHOLD 60 |
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437 |
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438 void MemTracker::sync() { |
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439 assert(_tracking_level > NMT_off, "NMT is not enabled"); |
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440 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); |
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441 |
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442 // Some GC tests hit large number of safepoints in short period of time |
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443 // without meaningful activities. We should prevent going to |
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444 // sync point in these cases, which can potentially exhaust generation buffer. |
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445 // Here is the factots to determine if we should go into sync point: |
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446 // 1. not to overflow sequence number |
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447 // 2. if we are in danger to overflow generation buffer |
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448 // 3. how many safepoints we already skipped sync point |
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449 if (_state == NMT_started) { |
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450 // worker thread is not ready, no one can manage generation |
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451 // buffer, so skip this safepoint |
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452 if (_worker_thread == NULL) return; |
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453 |
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454 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { |
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455 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; |
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456 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; |
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457 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { |
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458 _sync_point_skip_count ++; |
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459 return; |
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460 } |
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461 } |
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462 _sync_point_skip_count = 0; |
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463 // walk all JavaThreads to collect recorders |
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464 SyncThreadRecorderClosure stc; |
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465 Threads::threads_do(&stc); |
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466 |
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467 _thread_count = stc.get_thread_count(); |
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468 MemRecorder* pending_recorders = get_pending_recorders(); |
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469 |
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470 { |
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471 // This method is running at safepoint, with ThreadCritical lock, |
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472 // it should guarantee that NMT is fully sync-ed. |
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473 ThreadCritical tc; |
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474 if (_global_recorder != NULL) { |
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475 _global_recorder->set_next(pending_recorders); |
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476 pending_recorders = _global_recorder; |
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477 _global_recorder = NULL; |
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478 } |
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479 SequenceGenerator::reset(); |
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480 // check _worker_thread with lock to avoid racing condition |
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481 if (_worker_thread != NULL) { |
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482 _worker_thread->at_sync_point(pending_recorders); |
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483 } |
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484 } |
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485 } |
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486 |
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487 // now, it is the time to shut whole things off |
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488 if (_state == NMT_final_shutdown) { |
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489 _tracking_level = NMT_off; |
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490 |
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491 // walk all JavaThreads to delete all recorders |
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492 SyncThreadRecorderClosure stc; |
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493 Threads::threads_do(&stc); |
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494 // delete global recorder |
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495 { |
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496 ThreadCritical tc; |
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497 if (_global_recorder != NULL) { |
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498 delete _global_recorder; |
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499 _global_recorder = NULL; |
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500 } |
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501 } |
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502 |
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503 _state = NMT_shutdown; |
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504 } |
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505 } |
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506 |
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507 /* |
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508 * Start worker thread. |
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509 */ |
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510 bool MemTracker::start_worker() { |
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511 assert(_worker_thread == NULL, "Just Check"); |
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512 _worker_thread = new (std::nothrow) MemTrackWorker(); |
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513 if (_worker_thread == NULL || _worker_thread->has_error()) { |
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514 shutdown(NMT_initialization); |
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515 return false; |
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516 } |
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517 _worker_thread->start(); |
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518 return true; |
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519 } |
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520 |
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521 /* |
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522 * We need to collect a JavaThread's per-thread recorder |
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523 * before it exits. |
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524 */ |
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525 void MemTracker::thread_exiting(JavaThread* thread) { |
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526 if (is_on()) { |
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527 MemRecorder* rec = thread->get_recorder(); |
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528 if (rec != NULL) { |
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529 enqueue_pending_recorder(rec); |
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530 thread->set_recorder(NULL); |
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531 } |
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532 } |
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533 } |
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534 |
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535 // baseline current memory snapshot |
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536 bool MemTracker::baseline() { |
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537 MutexLockerEx lock(&_query_lock, true); |
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538 MemSnapshot* snapshot = get_snapshot(); |
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539 if (snapshot != NULL) { |
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540 return _baseline.baseline(*snapshot, false); |
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541 } |
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542 return false; |
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543 } |
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544 |
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545 // print memory usage from current snapshot |
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546 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { |
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547 MemBaseline baseline; |
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548 MutexLockerEx lock(&_query_lock, true); |
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549 MemSnapshot* snapshot = get_snapshot(); |
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550 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { |
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551 BaselineReporter reporter(out, unit); |
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552 reporter.report_baseline(baseline, summary_only); |
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553 return true; |
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554 } |
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555 return false; |
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556 } |
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557 |
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558 // compare memory usage between current snapshot and baseline |
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559 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { |
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560 MutexLockerEx lock(&_query_lock, true); |
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561 if (_baseline.baselined()) { |
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562 MemBaseline baseline; |
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563 MemSnapshot* snapshot = get_snapshot(); |
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564 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { |
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565 BaselineReporter reporter(out, unit); |
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566 reporter.diff_baselines(baseline, _baseline, summary_only); |
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567 return true; |
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568 } |
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569 } |
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570 return false; |
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571 } |
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572 |
|
573 #ifndef PRODUCT |
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574 void MemTracker::walk_stack(int toSkip, char* buf, int len) { |
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575 int cur_len = 0; |
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576 char tmp[1024]; |
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577 address pc; |
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578 |
|
579 while (cur_len < len) { |
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580 pc = os::get_caller_pc(toSkip + 1); |
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581 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { |
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582 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); |
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583 cur_len = (int)strlen(buf); |
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584 } else { |
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585 buf[cur_len] = '\0'; |
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586 break; |
|
587 } |
|
588 toSkip ++; |
|
589 } |
|
590 } |
|
591 |
|
592 void MemTracker::print_tracker_stats(outputStream* st) { |
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593 st->print_cr("\nMemory Tracker Stats:"); |
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594 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); |
|
595 st->print_cr("\tthead count = %d", _thread_count); |
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596 st->print_cr("\tArena instance = %d", Arena::_instance_count); |
|
597 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); |
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598 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); |
|
599 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); |
|
600 if (_worker_thread != NULL) { |
|
601 st->print_cr("\tWorker thread:"); |
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602 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); |
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603 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); |
|
604 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); |
|
605 } else { |
|
606 st->print_cr("\tWorker thread is not started"); |
|
607 } |
|
608 st->print_cr(" "); |
|
609 |
|
610 if (_snapshot != NULL) { |
|
611 _snapshot->print_snapshot_stats(st); |
|
612 } else { |
|
613 st->print_cr("No snapshot"); |
|
614 } |
|
615 } |
|
616 #endif |
|
617 |