--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,283 @@
+/*
+ * Copyright 2005-2007 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/_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();
+ TaskQueueSetSuper* qset = ParCompactionManager::chunk_array();
+ ParallelTaskTerminator terminator(parallel_gc_threads, qset);
+ GCTaskQueue* q = GCTaskQueue::create();
+ for(uint i=0; i<parallel_gc_threads; i++) {
+ q->enqueue(new RefProcTaskProxy(task, i));
+ }
+ if (task.marks_oops_alive()) {
+ if (parallel_gc_threads>1) {
+ for (uint j=0; j<parallel_gc_threads; j++) {
+ q->enqueue(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; i<parallel_gc_threads; i++) {
+ q->enqueue(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();
+}