Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.cpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | 4ca6dc0799b6 |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* | |
| 17524 | 3 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
|
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
| 0 | 23 * |
| 24 */ | |
| 25 | |
| 1972 | 26 #include "precompiled.hpp" |
| 27 #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" | |
| 28 #include "gc_implementation/parallelScavenge/gcTaskThread.hpp" | |
| 29 #include "memory/allocation.hpp" | |
| 30 #include "memory/allocation.inline.hpp" | |
| 31 #include "memory/resourceArea.hpp" | |
| 32 #include "runtime/handles.hpp" | |
| 33 #include "runtime/handles.inline.hpp" | |
| 34 #include "runtime/os.hpp" | |
| 35 #include "runtime/thread.hpp" | |
| 0 | 36 |
| 37 GCTaskThread::GCTaskThread(GCTaskManager* manager, | |
| 38 uint which, | |
| 39 uint processor_id) : | |
| 40 _manager(manager), | |
| 41 _processor_id(processor_id), | |
| 42 _time_stamps(NULL), | |
| 43 _time_stamp_index(0) | |
| 44 { | |
| 45 if (!os::create_thread(this, os::pgc_thread)) | |
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46 vm_exit_out_of_memory(0, OOM_MALLOC_ERROR, "Cannot create GC thread. Out of system resources."); |
| 0 | 47 |
| 48 if (PrintGCTaskTimeStamps) { | |
| 6197 | 49 _time_stamps = NEW_C_HEAP_ARRAY(GCTaskTimeStamp, GCTaskTimeStampEntries, mtGC); |
| 0 | 50 |
| 51 guarantee(_time_stamps != NULL, "Sanity"); | |
| 52 } | |
| 53 set_id(which); | |
| 54 set_name("GC task thread#%d (ParallelGC)", which); | |
| 55 } | |
| 56 | |
| 57 GCTaskThread::~GCTaskThread() { | |
| 58 if (_time_stamps != NULL) { | |
| 6197 | 59 FREE_C_HEAP_ARRAY(GCTaskTimeStamp, _time_stamps, mtGC); |
| 0 | 60 } |
| 61 } | |
| 62 | |
| 63 void GCTaskThread::start() { | |
| 64 os::start_thread(this); | |
| 65 } | |
| 66 | |
| 67 GCTaskTimeStamp* GCTaskThread::time_stamp_at(uint index) { | |
| 68 guarantee(index < GCTaskTimeStampEntries, "increase GCTaskTimeStampEntries"); | |
| 69 | |
| 70 return &(_time_stamps[index]); | |
| 71 } | |
| 72 | |
| 73 void GCTaskThread::print_task_time_stamps() { | |
| 74 assert(PrintGCTaskTimeStamps, "Sanity"); | |
| 75 assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)"); | |
| 76 | |
| 77 tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index); | |
| 78 for(uint i=0; i<_time_stamp_index; i++) { | |
| 79 GCTaskTimeStamp* time_stamp = time_stamp_at(i); | |
| 80 tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]", | |
| 81 time_stamp->name(), | |
| 82 time_stamp->entry_time(), | |
| 83 time_stamp->exit_time()); | |
| 84 } | |
| 85 | |
| 86 // Reset after dumping the data | |
| 87 _time_stamp_index = 0; | |
| 88 } | |
| 89 | |
| 90 void GCTaskThread::print_on(outputStream* st) const { | |
| 91 st->print("\"%s\" ", name()); | |
| 92 Thread::print_on(st); | |
| 93 st->cr(); | |
| 94 } | |
| 95 | |
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96 // GC workers get tasks from the GCTaskManager and execute |
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97 // them in this method. If there are no tasks to execute, |
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98 // the GC workers wait in the GCTaskManager's get_task() |
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99 // for tasks to be enqueued for execution. |
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100 |
| 0 | 101 void GCTaskThread::run() { |
| 102 // Set up the thread for stack overflow support | |
| 103 this->record_stack_base_and_size(); | |
| 104 this->initialize_thread_local_storage(); | |
| 105 // Bind yourself to your processor. | |
| 106 if (processor_id() != GCTaskManager::sentinel_worker()) { | |
| 107 if (TraceGCTaskThread) { | |
| 108 tty->print_cr("GCTaskThread::run: " | |
| 109 " binding to processor %u", processor_id()); | |
| 110 } | |
| 111 if (!os::bind_to_processor(processor_id())) { | |
| 112 DEBUG_ONLY( | |
| 113 warning("Couldn't bind GCTaskThread %u to processor %u", | |
| 114 which(), processor_id()); | |
| 115 ) | |
| 116 } | |
| 117 } | |
| 118 // Part of thread setup. | |
| 119 // ??? Are these set up once here to make subsequent ones fast? | |
| 120 HandleMark hm_outer; | |
| 121 ResourceMark rm_outer; | |
| 122 | |
| 123 TimeStamp timer; | |
| 124 | |
| 125 for (;/* ever */;) { | |
| 126 // These are so we can flush the resources allocated in the inner loop. | |
| 127 HandleMark hm_inner; | |
| 128 ResourceMark rm_inner; | |
| 129 for (; /* break */; ) { | |
| 130 // This will block until there is a task to be gotten. | |
| 131 GCTask* task = manager()->get_task(which()); | |
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132 // Record if this is an idle task for later use. |
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133 bool is_idle_task = task->is_idle_task(); |
| 0 | 134 // In case the update is costly |
| 135 if (PrintGCTaskTimeStamps) { | |
| 136 timer.update(); | |
| 137 } | |
| 138 | |
| 139 jlong entry_time = timer.ticks(); | |
| 140 char* name = task->name(); | |
| 141 | |
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142 // If this is the barrier task, it can be destroyed |
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143 // by the GC task manager once the do_it() executes. |
| 0 | 144 task->do_it(manager(), which()); |
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145 |
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146 // Use the saved value of is_idle_task because references |
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147 // using "task" are not reliable for the barrier task. |
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148 if (!is_idle_task) { |
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149 manager()->note_completion(which()); |
| 0 | 150 |
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151 if (PrintGCTaskTimeStamps) { |
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152 assert(_time_stamps != NULL, |
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153 "Sanity (PrintGCTaskTimeStamps set late?)"); |
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154 |
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155 timer.update(); |
| 0 | 156 |
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157 GCTaskTimeStamp* time_stamp = time_stamp_at(_time_stamp_index++); |
| 0 | 158 |
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159 time_stamp->set_name(name); |
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160 time_stamp->set_entry_time(entry_time); |
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161 time_stamp->set_exit_time(timer.ticks()); |
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162 } |
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163 } else { |
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164 // idle tasks complete outside the normal accounting |
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165 // so that a task can complete without waiting for idle tasks. |
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166 // They have to be terminated separately. |
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167 IdleGCTask::destroy((IdleGCTask*)task); |
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168 set_is_working(true); |
| 0 | 169 } |
| 170 | |
| 171 // Check if we should release our inner resources. | |
| 172 if (manager()->should_release_resources(which())) { | |
| 173 manager()->note_release(which()); | |
| 174 break; | |
| 175 } | |
| 176 } | |
| 177 } | |
| 178 } |