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J. Duke
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/*
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* Copyright 2005-2007 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/_pcTasks.cpp.incl"
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//
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// ThreadRootsMarkingTask
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//
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void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) {
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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ResourceMark rm;
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NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
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if (_java_thread != NULL)
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_java_thread->oops_do(&mark_and_push_closure);
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if (_vm_thread != NULL)
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_vm_thread->oops_do(&mark_and_push_closure);
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// Do the real work
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cm->drain_marking_stacks(&mark_and_push_closure);
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}
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void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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NOT_PRODUCT(TraceTime tm("MarkFromRootsTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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// cm->allocate_stacks();
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assert(cm->stacks_have_been_allocated(),
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"Stack space has not been allocated");
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
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switch (_root_type) {
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case universe:
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Universe::oops_do(&mark_and_push_closure);
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break;
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case reference_processing:
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ReferenceProcessor::oops_do(&mark_and_push_closure);
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break;
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case jni_handles:
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JNIHandles::oops_do(&mark_and_push_closure);
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break;
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case threads:
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{
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ResourceMark rm;
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Threads::oops_do(&mark_and_push_closure);
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}
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break;
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case object_synchronizer:
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ObjectSynchronizer::oops_do(&mark_and_push_closure);
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break;
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case flat_profiler:
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FlatProfiler::oops_do(&mark_and_push_closure);
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break;
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case management:
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Management::oops_do(&mark_and_push_closure);
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break;
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case jvmti:
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JvmtiExport::oops_do(&mark_and_push_closure);
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break;
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case system_dictionary:
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SystemDictionary::always_strong_oops_do(&mark_and_push_closure);
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break;
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case vm_symbols:
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vmSymbols::oops_do(&mark_and_push_closure);
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break;
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default:
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fatal("Unknown root type");
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}
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// Do the real work
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cm->drain_marking_stacks(&mark_and_push_closure);
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// cm->deallocate_stacks();
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}
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//
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// RefProcTaskProxy
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//
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void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which)
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{
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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NOT_PRODUCT(TraceTime tm("RefProcTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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// cm->allocate_stacks();
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assert(cm->stacks_have_been_allocated(),
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"Stack space has not been allocated");
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
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PSParallelCompact::FollowStackClosure follow_stack_closure(cm);
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_rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(),
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mark_and_push_closure, follow_stack_closure);
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}
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//
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// RefProcTaskExecutor
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//
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void RefProcTaskExecutor::execute(ProcessTask& task)
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{
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ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
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uint parallel_gc_threads = heap->gc_task_manager()->workers();
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TaskQueueSetSuper* qset = ParCompactionManager::chunk_array();
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ParallelTaskTerminator terminator(parallel_gc_threads, qset);
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GCTaskQueue* q = GCTaskQueue::create();
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for(uint i=0; i<parallel_gc_threads; i++) {
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q->enqueue(new RefProcTaskProxy(task, i));
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}
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if (task.marks_oops_alive()) {
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if (parallel_gc_threads>1) {
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for (uint j=0; j<parallel_gc_threads; j++) {
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q->enqueue(new StealMarkingTask(&terminator));
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}
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}
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}
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PSParallelCompact::gc_task_manager()->execute_and_wait(q);
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}
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void RefProcTaskExecutor::execute(EnqueueTask& task)
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{
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ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();
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uint parallel_gc_threads = heap->gc_task_manager()->workers();
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GCTaskQueue* q = GCTaskQueue::create();
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for(uint i=0; i<parallel_gc_threads; i++) {
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q->enqueue(new RefEnqueueTaskProxy(task, i));
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}
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PSParallelCompact::gc_task_manager()->execute_and_wait(q);
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}
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//
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// StealMarkingTask
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//
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StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :
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_terminator(t) {}
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void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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NOT_PRODUCT(TraceTime tm("StealMarkingTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
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oop obj = NULL;
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int random_seed = 17;
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while(true) {
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if (ParCompactionManager::steal(which, &random_seed, obj)) {
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obj->follow_contents(cm);
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cm->drain_marking_stacks(&mark_and_push_closure);
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} else {
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if (terminator()->offer_termination()) {
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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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//
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// StealChunkCompactionTask
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//
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StealChunkCompactionTask::StealChunkCompactionTask(ParallelTaskTerminator* t) :
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_terminator(t) {};
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void StealChunkCompactionTask::do_it(GCTaskManager* manager, uint which) {
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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NOT_PRODUCT(TraceTime tm("StealChunkCompactionTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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// Has to drain stacks first because there may be chunks on
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// preloaded onto the stack and this thread may never have
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// done a draining task. Are the draining tasks needed?
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cm->drain_chunk_stacks();
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size_t chunk_index = 0;
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int random_seed = 17;
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// If we're the termination task, try 10 rounds of stealing before
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// setting the termination flag
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while(true) {
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if (ParCompactionManager::steal(which, &random_seed, chunk_index)) {
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PSParallelCompact::fill_and_update_chunk(cm, chunk_index);
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cm->drain_chunk_stacks();
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} else {
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if (terminator()->offer_termination()) {
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break;
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}
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// Go around again.
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}
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}
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return;
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}
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UpdateDensePrefixTask::UpdateDensePrefixTask(
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PSParallelCompact::SpaceId space_id,
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size_t chunk_index_start,
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size_t chunk_index_end) :
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_space_id(space_id), _chunk_index_start(chunk_index_start),
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_chunk_index_end(chunk_index_end)
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{}
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void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) {
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NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,
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_space_id,
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_chunk_index_start,
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_chunk_index_end);
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}
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void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) {
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assert(Universe::heap()->is_gc_active(), "called outside gc");
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NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask",
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PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));
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ParCompactionManager* cm =
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ParCompactionManager::gc_thread_compaction_manager(which);
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// Process any chunks already in the compaction managers stacks.
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cm->drain_chunk_stacks();
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}
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