Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/psTasks.cpp @ 17381:40dce17629ac
correct IfNode probabilities in If-Deopt situations
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Wed, 08 Oct 2014 10:49:53 +0200 |
parents | 4ca6dc0799b6 |
children | 89152779163c |
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/* * Copyright (c) 2002, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/systemDictionary.hpp" #include "code/codeCache.hpp" #include "gc_implementation/parallelScavenge/cardTableExtension.hpp" #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" #include "gc_implementation/parallelScavenge/psMarkSweep.hpp" #include "gc_implementation/parallelScavenge/psPromotionManager.hpp" #include "gc_implementation/parallelScavenge/psPromotionManager.inline.hpp" #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" #include "gc_implementation/parallelScavenge/psTasks.hpp" #include "memory/iterator.hpp" #include "memory/universe.hpp" #include "oops/oop.inline.hpp" #include "oops/oop.psgc.inline.hpp" #include "runtime/fprofiler.hpp" #include "runtime/thread.hpp" #include "runtime/vmThread.hpp" #include "services/management.hpp" #include "utilities/taskqueue.hpp" // // ScavengeRootsTask // void ScavengeRootsTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); PSScavengeRootsClosure roots_closure(pm); PSPromoteRootsClosure roots_to_old_closure(pm); switch (_root_type) { case universe: Universe::oops_do(&roots_closure); break; case jni_handles: JNIHandles::oops_do(&roots_closure); break; case threads: { ResourceMark rm; CLDToOopClosure* cld_closure = NULL; // Not needed. All CLDs are already visited. Threads::oops_do(&roots_closure, cld_closure, NULL); } break; case object_synchronizer: ObjectSynchronizer::oops_do(&roots_closure); break; case flat_profiler: FlatProfiler::oops_do(&roots_closure); break; case system_dictionary: SystemDictionary::oops_do(&roots_closure); break; case class_loader_data: { PSScavengeKlassClosure klass_closure(pm); ClassLoaderDataGraph::oops_do(&roots_closure, &klass_closure, false); } break; case management: Management::oops_do(&roots_closure); break; case jvmti: JvmtiExport::oops_do(&roots_closure); break; case code_cache: { CodeBlobToOopClosure each_scavengable_code_blob(&roots_to_old_closure, /*do_marking=*/ true); CodeCache::scavenge_root_nmethods_do(&each_scavengable_code_blob); } break; default: fatal("Unknown root type"); } // Do the real work pm->drain_stacks(false); } // // ThreadRootsTask // void ThreadRootsTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); PSScavengeRootsClosure roots_closure(pm); CLDToOopClosure* roots_from_clds = NULL; // Not needed. All CLDs are already visited. CodeBlobToOopClosure roots_in_blobs(&roots_closure, /*do_marking=*/ true); if (_java_thread != NULL) _java_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs); if (_vm_thread != NULL) _vm_thread->oops_do(&roots_closure, roots_from_clds, &roots_in_blobs); // Do the real work pm->drain_stacks(false); } // // StealTask // StealTask::StealTask(ParallelTaskTerminator* t) : _terminator(t) {} void StealTask::do_it(GCTaskManager* manager, uint which) { assert(Universe::heap()->is_gc_active(), "called outside gc"); PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); pm->drain_stacks(true); guarantee(pm->stacks_empty(), "stacks should be empty at this point"); int random_seed = 17; while(true) { StarTask p; if (PSPromotionManager::steal_depth(which, &random_seed, p)) { TASKQUEUE_STATS_ONLY(pm->record_steal(p)); pm->process_popped_location_depth(p); pm->drain_stacks_depth(true); } else { if (terminator()->offer_termination()) { break; } } } guarantee(pm->stacks_empty(), "stacks should be empty at this point"); } // // OldToYoungRootsTask // void OldToYoungRootsTask::do_it(GCTaskManager* manager, uint which) { // There are not old-to-young pointers if the old gen is empty. assert(!_gen->object_space()->is_empty(), "Should not be called is there is no work"); assert(_gen != NULL, "Sanity"); assert(_gen->object_space()->contains(_gen_top) || _gen_top == _gen->object_space()->top(), "Sanity"); assert(_stripe_number < ParallelGCThreads, "Sanity"); { PSPromotionManager* pm = PSPromotionManager::gc_thread_promotion_manager(which); assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity"); CardTableExtension* card_table = (CardTableExtension *)Universe::heap()->barrier_set(); // FIX ME! Assert that card_table is the type we believe it to be. card_table->scavenge_contents_parallel(_gen->start_array(), _gen->object_space(), _gen_top, pm, _stripe_number, _stripe_total); // Do the real work pm->drain_stacks(false); } }