Mercurial > hg > graal-compiler
diff src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/gc_implementation/parallelScavenge/gcTaskThread.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,150 @@ + +/* + * Copyright 2002-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#include "incls/_precompiled.incl" +#include "incls/_gcTaskThread.cpp.incl" + +GCTaskThread::GCTaskThread(GCTaskManager* manager, + uint which, + uint processor_id) : + _manager(manager), + _processor_id(processor_id), + _time_stamps(NULL), + _time_stamp_index(0) +{ + if (!os::create_thread(this, os::pgc_thread)) + vm_exit_out_of_memory(0, "Cannot create GC thread. Out of system resources."); + + if (PrintGCTaskTimeStamps) { + _time_stamps = NEW_C_HEAP_ARRAY(GCTaskTimeStamp, GCTaskTimeStampEntries ); + + guarantee(_time_stamps != NULL, "Sanity"); + } + set_id(which); + set_name("GC task thread#%d (ParallelGC)", which); +} + +GCTaskThread::~GCTaskThread() { + if (_time_stamps != NULL) { + FREE_C_HEAP_ARRAY(GCTaskTimeStamp, _time_stamps); + } +} + +void GCTaskThread::start() { + os::start_thread(this); +} + +GCTaskTimeStamp* GCTaskThread::time_stamp_at(uint index) { + guarantee(index < GCTaskTimeStampEntries, "increase GCTaskTimeStampEntries"); + + return &(_time_stamps[index]); +} + +void GCTaskThread::print_task_time_stamps() { + assert(PrintGCTaskTimeStamps, "Sanity"); + assert(_time_stamps != NULL, "Sanity (Probably set PrintGCTaskTimeStamps late)"); + + tty->print_cr("GC-Thread %u entries: %d", id(), _time_stamp_index); + for(uint i=0; i<_time_stamp_index; i++) { + GCTaskTimeStamp* time_stamp = time_stamp_at(i); + tty->print_cr("\t[ %s " INT64_FORMAT " " INT64_FORMAT " ]", + time_stamp->name(), + time_stamp->entry_time(), + time_stamp->exit_time()); + } + + // Reset after dumping the data + _time_stamp_index = 0; +} + +void GCTaskThread::print_on(outputStream* st) const { + st->print("\"%s\" ", name()); + Thread::print_on(st); + st->cr(); +} + +void GCTaskThread::run() { + // Set up the thread for stack overflow support + this->record_stack_base_and_size(); + this->initialize_thread_local_storage(); + // Bind yourself to your processor. + if (processor_id() != GCTaskManager::sentinel_worker()) { + if (TraceGCTaskThread) { + tty->print_cr("GCTaskThread::run: " + " binding to processor %u", processor_id()); + } + if (!os::bind_to_processor(processor_id())) { + DEBUG_ONLY( + warning("Couldn't bind GCTaskThread %u to processor %u", + which(), processor_id()); + ) + } + } + // Part of thread setup. + // ??? Are these set up once here to make subsequent ones fast? + HandleMark hm_outer; + ResourceMark rm_outer; + + TimeStamp timer; + + for (;/* ever */;) { + // These are so we can flush the resources allocated in the inner loop. + HandleMark hm_inner; + ResourceMark rm_inner; + for (; /* break */; ) { + // This will block until there is a task to be gotten. + GCTask* task = manager()->get_task(which()); + + // In case the update is costly + if (PrintGCTaskTimeStamps) { + timer.update(); + } + + jlong entry_time = timer.ticks(); + char* name = task->name(); + + task->do_it(manager(), which()); + manager()->note_completion(which()); + + if (PrintGCTaskTimeStamps) { + assert(_time_stamps != NULL, "Sanity (PrintGCTaskTimeStamps set late?)"); + + timer.update(); + + GCTaskTimeStamp* time_stamp = time_stamp_at(_time_stamp_index++); + + time_stamp->set_name(name); + time_stamp->set_entry_time(entry_time); + time_stamp->set_exit_time(timer.ticks()); + } + + // Check if we should release our inner resources. + if (manager()->should_release_resources(which())) { + manager()->note_release(which()); + break; + } + } + } +}