Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.cpp @ 19083:09292c24d555
LSStackSlotAllocator: hide inner class.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Sat, 31 Jan 2015 11:07:15 +0100 |
parents | 52b4284cb496 |
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0 | 1 |
2 /* | |
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3 * Copyright (c) 2002, 2014, 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 |
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37 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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38 |
0 | 39 GCTaskThread::GCTaskThread(GCTaskManager* manager, |
40 uint which, | |
41 uint processor_id) : | |
42 _manager(manager), | |
43 _processor_id(processor_id), | |
44 _time_stamps(NULL), | |
45 _time_stamp_index(0) | |
46 { | |
47 if (!os::create_thread(this, os::pgc_thread)) | |
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48 vm_exit_out_of_memory(0, OOM_MALLOC_ERROR, "Cannot create GC thread. Out of system resources."); |
0 | 49 |
50 if (PrintGCTaskTimeStamps) { | |
6197 | 51 _time_stamps = NEW_C_HEAP_ARRAY(GCTaskTimeStamp, GCTaskTimeStampEntries, mtGC); |
0 | 52 |
53 guarantee(_time_stamps != NULL, "Sanity"); | |
54 } | |
55 set_id(which); | |
56 set_name("GC task thread#%d (ParallelGC)", which); | |
57 } | |
58 | |
59 GCTaskThread::~GCTaskThread() { | |
60 if (_time_stamps != NULL) { | |
6197 | 61 FREE_C_HEAP_ARRAY(GCTaskTimeStamp, _time_stamps, mtGC); |
0 | 62 } |
63 } | |
64 | |
65 void GCTaskThread::start() { | |
66 os::start_thread(this); | |
67 } | |
68 | |
69 GCTaskTimeStamp* GCTaskThread::time_stamp_at(uint index) { | |
70 guarantee(index < GCTaskTimeStampEntries, "increase GCTaskTimeStampEntries"); | |
71 | |
72 return &(_time_stamps[index]); | |
73 } | |
74 | |
75 void GCTaskThread::print_task_time_stamps() { | |
76 assert(PrintGCTaskTimeStamps, "Sanity"); | |
77 assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)"); | |
78 | |
79 tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index); | |
80 for(uint i=0; i<_time_stamp_index; i++) { | |
81 GCTaskTimeStamp* time_stamp = time_stamp_at(i); | |
82 tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]", | |
83 time_stamp->name(), | |
84 time_stamp->entry_time(), | |
85 time_stamp->exit_time()); | |
86 } | |
87 | |
88 // Reset after dumping the data | |
89 _time_stamp_index = 0; | |
90 } | |
91 | |
92 void GCTaskThread::print_on(outputStream* st) const { | |
93 st->print("\"%s\" ", name()); | |
94 Thread::print_on(st); | |
95 st->cr(); | |
96 } | |
97 | |
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98 // GC workers get tasks from the GCTaskManager and execute |
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99 // them in this method. If there are no tasks to execute, |
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100 // the GC workers wait in the GCTaskManager's get_task() |
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101 // for tasks to be enqueued for execution. |
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102 |
0 | 103 void GCTaskThread::run() { |
104 // Set up the thread for stack overflow support | |
105 this->record_stack_base_and_size(); | |
106 this->initialize_thread_local_storage(); | |
107 // Bind yourself to your processor. | |
108 if (processor_id() != GCTaskManager::sentinel_worker()) { | |
109 if (TraceGCTaskThread) { | |
110 tty->print_cr("GCTaskThread::run: " | |
111 " binding to processor %u", processor_id()); | |
112 } | |
113 if (!os::bind_to_processor(processor_id())) { | |
114 DEBUG_ONLY( | |
115 warning("Couldn't bind GCTaskThread %u to processor %u", | |
116 which(), processor_id()); | |
117 ) | |
118 } | |
119 } | |
120 // Part of thread setup. | |
121 // ??? Are these set up once here to make subsequent ones fast? | |
122 HandleMark hm_outer; | |
123 ResourceMark rm_outer; | |
124 | |
125 TimeStamp timer; | |
126 | |
127 for (;/* ever */;) { | |
128 // These are so we can flush the resources allocated in the inner loop. | |
129 HandleMark hm_inner; | |
130 ResourceMark rm_inner; | |
131 for (; /* break */; ) { | |
132 // This will block until there is a task to be gotten. | |
133 GCTask* task = manager()->get_task(which()); | |
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134 // Record if this is an idle task for later use. |
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135 bool is_idle_task = task->is_idle_task(); |
0 | 136 // In case the update is costly |
137 if (PrintGCTaskTimeStamps) { | |
138 timer.update(); | |
139 } | |
140 | |
141 jlong entry_time = timer.ticks(); | |
142 char* name = task->name(); | |
143 | |
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144 // If this is the barrier task, it can be destroyed |
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145 // by the GC task manager once the do_it() executes. |
0 | 146 task->do_it(manager(), which()); |
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147 |
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148 // Use the saved value of is_idle_task because references |
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149 // using "task" are not reliable for the barrier task. |
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150 if (!is_idle_task) { |
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151 manager()->note_completion(which()); |
0 | 152 |
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153 if (PrintGCTaskTimeStamps) { |
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154 assert(_time_stamps != NULL, |
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155 "Sanity (PrintGCTaskTimeStamps set late?)"); |
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156 |
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157 timer.update(); |
0 | 158 |
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159 GCTaskTimeStamp* time_stamp = time_stamp_at(_time_stamp_index++); |
0 | 160 |
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161 time_stamp->set_name(name); |
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162 time_stamp->set_entry_time(entry_time); |
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163 time_stamp->set_exit_time(timer.ticks()); |
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164 } |
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165 } else { |
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166 // idle tasks complete outside the normal accounting |
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167 // so that a task can complete without waiting for idle tasks. |
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168 // They have to be terminated separately. |
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169 IdleGCTask::destroy((IdleGCTask*)task); |
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170 set_is_working(true); |
0 | 171 } |
172 | |
173 // Check if we should release our inner resources. | |
174 if (manager()->should_release_resources(which())) { | |
175 manager()->note_release(which()); | |
176 break; | |
177 } | |
178 } | |
179 } | |
180 } |