/* * Copyright 2005-2008 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/_pcTasks.cpp.incl" // // ThreadRootsMarkingTask // void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); ResourceMark rm; NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); if (_java_thread != NULL) _java_thread->oops_do(&mark_and_push_closure); if (_vm_thread != NULL) _vm_thread->oops_do(&mark_and_push_closure); // Do the real work cm->drain_marking_stacks(&mark_and_push_closure); } void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); NOT_PRODUCT(TraceTime tm("MarkFromRootsTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); // cm->allocate_stacks(); assert(cm->stacks_have_been_allocated(), "Stack space has not been allocated"); PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); switch (_root_type) { case universe: Universe::oops_do(&mark_and_push_closure); break; case reference_processing: ReferenceProcessor::oops_do(&mark_and_push_closure); break; case jni_handles: JNIHandles::oops_do(&mark_and_push_closure); break; case threads: { ResourceMark rm; Threads::oops_do(&mark_and_push_closure); } break; case object_synchronizer: ObjectSynchronizer::oops_do(&mark_and_push_closure); break; case flat_profiler: FlatProfiler::oops_do(&mark_and_push_closure); break; case management: Management::oops_do(&mark_and_push_closure); break; case jvmti: JvmtiExport::oops_do(&mark_and_push_closure); break; case system_dictionary: SystemDictionary::always_strong_oops_do(&mark_and_push_closure); break; case vm_symbols: vmSymbols::oops_do(&mark_and_push_closure); break; default: fatal("Unknown root type"); } // Do the real work cm->drain_marking_stacks(&mark_and_push_closure); // cm->deallocate_stacks(); } // // RefProcTaskProxy // void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); NOT_PRODUCT(TraceTime tm("RefProcTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); // cm->allocate_stacks(); assert(cm->stacks_have_been_allocated(), "Stack space has not been allocated"); PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); PSParallelCompact::FollowStackClosure follow_stack_closure(cm); _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(), mark_and_push_closure, follow_stack_closure); } // // RefProcTaskExecutor // void RefProcTaskExecutor::execute(ProcessTask& task) { ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); uint parallel_gc_threads = heap->gc_task_manager()->workers(); ChunkTaskQueueSet* qset = ParCompactionManager::chunk_array(); ParallelTaskTerminator terminator(parallel_gc_threads, qset); GCTaskQueue* q = GCTaskQueue::create(); for(uint i=0; ienqueue(new RefProcTaskProxy(task, i)); } if (task.marks_oops_alive()) { if (parallel_gc_threads>1) { for (uint j=0; jenqueue(new StealMarkingTask(&terminator)); } } } PSParallelCompact::gc_task_manager()->execute_and_wait(q); } void RefProcTaskExecutor::execute(EnqueueTask& task) { ParallelScavengeHeap* heap = PSParallelCompact::gc_heap(); uint parallel_gc_threads = heap->gc_task_manager()->workers(); GCTaskQueue* q = GCTaskQueue::create(); for(uint i=0; ienqueue(new RefEnqueueTaskProxy(task, i)); } PSParallelCompact::gc_task_manager()->execute_and_wait(q); } // // StealMarkingTask // StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) : _terminator(t) {} void StealMarkingTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); NOT_PRODUCT(TraceTime tm("StealMarkingTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm); oop obj = NULL; int random_seed = 17; while(true) { if (ParCompactionManager::steal(which, &random_seed, obj)) { obj->follow_contents(cm); cm->drain_marking_stacks(&mark_and_push_closure); } else { if (terminator()->offer_termination()) { break; } } } } // // StealChunkCompactionTask // StealChunkCompactionTask::StealChunkCompactionTask(ParallelTaskTerminator* t) : _terminator(t) {}; void StealChunkCompactionTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); NOT_PRODUCT(TraceTime tm("StealChunkCompactionTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); // Has to drain stacks first because there may be chunks on // preloaded onto the stack and this thread may never have // done a draining task. Are the draining tasks needed? cm->drain_chunk_stacks(); size_t chunk_index = 0; int random_seed = 17; // If we're the termination task, try 10 rounds of stealing before // setting the termination flag while(true) { if (ParCompactionManager::steal(which, &random_seed, chunk_index)) { PSParallelCompact::fill_and_update_chunk(cm, chunk_index); cm->drain_chunk_stacks(); } else { if (terminator()->offer_termination()) { break; } // Go around again. } } return; } UpdateDensePrefixTask::UpdateDensePrefixTask( PSParallelCompact::SpaceId space_id, size_t chunk_index_start, size_t chunk_index_end) : _space_id(space_id), _chunk_index_start(chunk_index_start), _chunk_index_end(chunk_index_end) {} void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) { NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); PSParallelCompact::update_and_deadwood_in_dense_prefix(cm, _space_id, _chunk_index_start, _chunk_index_end); } void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask", PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty)); ParCompactionManager* cm = ParCompactionManager::gc_thread_compaction_manager(which); // Process any chunks already in the compaction managers stacks. cm->drain_chunk_stacks(); }