1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,150 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2002-2007 Sun Microsystems, Inc. All Rights Reserved.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.24 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.25 + * have any questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#include "incls/_precompiled.incl"
1.30 +#include "incls/_gcTaskThread.cpp.incl"
1.31 +
1.32 +GCTaskThread::GCTaskThread(GCTaskManager* manager,
1.33 + uint which,
1.34 + uint processor_id) :
1.35 + _manager(manager),
1.36 + _processor_id(processor_id),
1.37 + _time_stamps(NULL),
1.38 + _time_stamp_index(0)
1.39 +{
1.40 + if (!os::create_thread(this, os::pgc_thread))
1.41 + vm_exit_out_of_memory(0, "Cannot create GC thread. Out of system resources.");
1.42 +
1.43 + if (PrintGCTaskTimeStamps) {
1.44 + _time_stamps = NEW_C_HEAP_ARRAY(GCTaskTimeStamp, GCTaskTimeStampEntries );
1.45 +
1.46 + guarantee(_time_stamps != NULL, "Sanity");
1.47 + }
1.48 + set_id(which);
1.49 + set_name("GC task thread#%d (ParallelGC)", which);
1.50 +}
1.51 +
1.52 +GCTaskThread::~GCTaskThread() {
1.53 + if (_time_stamps != NULL) {
1.54 + FREE_C_HEAP_ARRAY(GCTaskTimeStamp, _time_stamps);
1.55 + }
1.56 +}
1.57 +
1.58 +void GCTaskThread::start() {
1.59 + os::start_thread(this);
1.60 +}
1.61 +
1.62 +GCTaskTimeStamp* GCTaskThread::time_stamp_at(uint index) {
1.63 + guarantee(index < GCTaskTimeStampEntries, "increase GCTaskTimeStampEntries");
1.64 +
1.65 + return &(_time_stamps[index]);
1.66 +}
1.67 +
1.68 +void GCTaskThread::print_task_time_stamps() {
1.69 + assert(PrintGCTaskTimeStamps, "Sanity");
1.70 + assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)");
1.71 +
1.72 + tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index);
1.73 + for(uint i=0; i<_time_stamp_index; i++) {
1.74 + GCTaskTimeStamp* time_stamp = time_stamp_at(i);
1.75 + tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]",
1.76 + time_stamp->name(),
1.77 + time_stamp->entry_time(),
1.78 + time_stamp->exit_time());
1.79 + }
1.80 +
1.81 + // Reset after dumping the data
1.82 + _time_stamp_index = 0;
1.83 +}
1.84 +
1.85 +void GCTaskThread::print_on(outputStream* st) const {
1.86 + st->print("\"%s\" ", name());
1.87 + Thread::print_on(st);
1.88 + st->cr();
1.89 +}
1.90 +
1.91 +void GCTaskThread::run() {
1.92 + // Set up the thread for stack overflow support
1.93 + this->record_stack_base_and_size();
1.94 + this->initialize_thread_local_storage();
1.95 + // Bind yourself to your processor.
1.96 + if (processor_id() != GCTaskManager::sentinel_worker()) {
1.97 + if (TraceGCTaskThread) {
1.98 + tty->print_cr("GCTaskThread::run: "
1.99 + " binding to processor %u", processor_id());
1.100 + }
1.101 + if (!os::bind_to_processor(processor_id())) {
1.102 + DEBUG_ONLY(
1.103 + warning("Couldn't bind GCTaskThread %u to processor %u",
1.104 + which(), processor_id());
1.105 + )
1.106 + }
1.107 + }
1.108 + // Part of thread setup.
1.109 + // ??? Are these set up once here to make subsequent ones fast?
1.110 + HandleMark hm_outer;
1.111 + ResourceMark rm_outer;
1.112 +
1.113 + TimeStamp timer;
1.114 +
1.115 + for (;/* ever */;) {
1.116 + // These are so we can flush the resources allocated in the inner loop.
1.117 + HandleMark hm_inner;
1.118 + ResourceMark rm_inner;
1.119 + for (; /* break */; ) {
1.120 + // This will block until there is a task to be gotten.
1.121 + GCTask* task = manager()->get_task(which());
1.122 +
1.123 + // In case the update is costly
1.124 + if (PrintGCTaskTimeStamps) {
1.125 + timer.update();
1.126 + }
1.127 +
1.128 + jlong entry_time = timer.ticks();
1.129 + char* name = task->name();
1.130 +
1.131 + task->do_it(manager(), which());
1.132 + manager()->note_completion(which());
1.133 +
1.134 + if (PrintGCTaskTimeStamps) {
1.135 + assert(_time_stamps != NULL, "Sanity (PrintGCTaskTimeStamps set late?)");
1.136 +
1.137 + timer.update();
1.138 +
1.139 + GCTaskTimeStamp* time_stamp = time_stamp_at(_time_stamp_index++);
1.140 +
1.141 + time_stamp->set_name(name);
1.142 + time_stamp->set_entry_time(entry_time);
1.143 + time_stamp->set_exit_time(timer.ticks());
1.144 + }
1.145 +
1.146 + // Check if we should release our inner resources.
1.147 + if (manager()->should_release_resources(which())) {
1.148 + manager()->note_release(which());
1.149 + break;
1.150 + }
1.151 + }
1.152 + }
1.153 +}
