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/*
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* Copyright 2002-2007 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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#include "incls/_precompiled.incl"
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#include "incls/_gcTaskThread.cpp.incl"
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GCTaskThread::GCTaskThread(GCTaskManager* manager,
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uint which,
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uint processor_id) :
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_manager(manager),
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_processor_id(processor_id),
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_time_stamps(NULL),
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_time_stamp_index(0)
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{
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if (!os::create_thread(this, os::pgc_thread))
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vm_exit_out_of_memory(0, "Cannot create GC thread. Out of system resources.");
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if (PrintGCTaskTimeStamps) {
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_time_stamps = NEW_C_HEAP_ARRAY(GCTaskTimeStamp, GCTaskTimeStampEntries );
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guarantee(_time_stamps != NULL, "Sanity");
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}
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set_id(which);
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set_name("GC task thread#%d (ParallelGC)", which);
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}
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GCTaskThread::~GCTaskThread() {
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if (_time_stamps != NULL) {
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FREE_C_HEAP_ARRAY(GCTaskTimeStamp, _time_stamps);
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}
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}
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void GCTaskThread::start() {
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os::start_thread(this);
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}
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GCTaskTimeStamp* GCTaskThread::time_stamp_at(uint index) {
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guarantee(index < GCTaskTimeStampEntries, "increase GCTaskTimeStampEntries");
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return &(_time_stamps[index]);
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}
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void GCTaskThread::print_task_time_stamps() {
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assert(PrintGCTaskTimeStamps, "Sanity");
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assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)");
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tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index);
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for(uint i=0; i<_time_stamp_index; i++) {
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GCTaskTimeStamp* time_stamp = time_stamp_at(i);
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tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]",
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time_stamp->name(),
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time_stamp->entry_time(),
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time_stamp->exit_time());
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}
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// Reset after dumping the data
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_time_stamp_index = 0;
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}
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void GCTaskThread::print_on(outputStream* st) const {
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st->print("\"%s\" ", name());
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Thread::print_on(st);
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st->cr();
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}
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void GCTaskThread::run() {
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// Set up the thread for stack overflow support
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this->record_stack_base_and_size();
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this->initialize_thread_local_storage();
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// Bind yourself to your processor.
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if (processor_id() != GCTaskManager::sentinel_worker()) {
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if (TraceGCTaskThread) {
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tty->print_cr("GCTaskThread::run: "
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" binding to processor %u", processor_id());
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}
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if (!os::bind_to_processor(processor_id())) {
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DEBUG_ONLY(
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warning("Couldn't bind GCTaskThread %u to processor %u",
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which(), processor_id());
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)
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}
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}
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// Part of thread setup.
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// ??? Are these set up once here to make subsequent ones fast?
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HandleMark hm_outer;
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ResourceMark rm_outer;
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TimeStamp timer;
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for (;/* ever */;) {
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// These are so we can flush the resources allocated in the inner loop.
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HandleMark hm_inner;
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ResourceMark rm_inner;
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for (; /* break */; ) {
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// This will block until there is a task to be gotten.
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GCTask* task = manager()->get_task(which());
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// In case the update is costly
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if (PrintGCTaskTimeStamps) {
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timer.update();
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}
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jlong entry_time = timer.ticks();
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char* name = task->name();
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task->do_it(manager(), which());
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manager()->note_completion(which());
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if (PrintGCTaskTimeStamps) {
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assert(_time_stamps != NULL, "Sanity (PrintGCTaskTimeStamps set late?)");
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timer.update();
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GCTaskTimeStamp* time_stamp = time_stamp_at(_time_stamp_index++);
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time_stamp->set_name(name);
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time_stamp->set_entry_time(entry_time);
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time_stamp->set_exit_time(timer.ticks());
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}
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// Check if we should release our inner resources.
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if (manager()->should_release_resources(which())) {
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manager()->note_release(which());
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break;
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}
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}
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}
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}
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