Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/pcTasks.hpp @ 18454:5af19da6fae5
DelayedFrameMapBuilder: remove TrackedVirtualStackSlot.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Mon, 17 Nov 2014 19:34:08 +0100 |
parents | 89152779163c |
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/* * Copyright (c) 2005, 2013, 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. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP #include "gc_implementation/parallelScavenge/gcTaskManager.hpp" #include "gc_implementation/parallelScavenge/psParallelCompact.hpp" #include "gc_implementation/parallelScavenge/psTasks.hpp" // Tasks for parallel compaction of the old generation // // Tasks are created and enqueued on a task queue. The // tasks for parallel old collector for marking objects // are MarkFromRootsTask and ThreadRootsMarkingTask. // // MarkFromRootsTask's are created // with a root group (e.g., jni_handles) and when the do_it() // method of a MarkFromRootsTask is executed, it starts marking // form it's root group. // // ThreadRootsMarkingTask's are created for each Java thread. When // the do_it() method of a ThreadRootsMarkingTask is executed, it // starts marking from the thread's roots. // // The enqueuing of the MarkFromRootsTask and ThreadRootsMarkingTask // do little more than create the task and put it on a queue. The // queue is a GCTaskQueue and threads steal tasks from this GCTaskQueue. // // In addition to the MarkFromRootsTask and ThreadRootsMarkingTask // tasks there are StealMarkingTask tasks. The StealMarkingTask's // steal a reference from the marking stack of another // thread and transitively marks the object of the reference // and internal references. After successfully stealing a reference // and marking it, the StealMarkingTask drains its marking stack // stack before attempting another steal. // // ThreadRootsMarkingTask // // This task marks from the roots of a single thread. This task // enables marking of thread roots in parallel. // class ParallelTaskTerminator; class ThreadRootsMarkingTask : public GCTask { private: JavaThread* _java_thread; VMThread* _vm_thread; public: ThreadRootsMarkingTask(JavaThread* root) : _java_thread(root), _vm_thread(NULL) {} ThreadRootsMarkingTask(VMThread* root) : _java_thread(NULL), _vm_thread(root) {} char* name() { return (char *)"thread-roots-marking-task"; } virtual void do_it(GCTaskManager* manager, uint which); }; // // MarkFromRootsTask // // This task marks from all the roots to all live // objects. // // class MarkFromRootsTask : public GCTask { public: enum RootType { universe = 1, jni_handles = 2, threads = 3, object_synchronizer = 4, flat_profiler = 5, management = 6, jvmti = 7, system_dictionary = 8, class_loader_data = 9, code_cache = 10 }; private: RootType _root_type; public: MarkFromRootsTask(RootType value) : _root_type(value) {} char* name() { return (char *)"mark-from-roots-task"; } virtual void do_it(GCTaskManager* manager, uint which); }; // // RefProcTaskProxy // // This task is used as a proxy to parallel reference processing tasks . // class RefProcTaskProxy : public GCTask { typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; ProcessTask & _rp_task; uint _work_id; public: RefProcTaskProxy(ProcessTask & rp_task, uint work_id) : _rp_task(rp_task), _work_id(work_id) { } private: virtual char* name() { return (char *)"Process referents by policy in parallel"; } virtual void do_it(GCTaskManager* manager, uint which); }; // // RefEnqueueTaskProxy // // This task is used as a proxy to parallel reference processing tasks . // class RefEnqueueTaskProxy: public GCTask { typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; EnqueueTask& _enq_task; uint _work_id; public: RefEnqueueTaskProxy(EnqueueTask& enq_task, uint work_id) : _enq_task(enq_task), _work_id(work_id) { } virtual char* name() { return (char *)"Enqueue reference objects in parallel"; } virtual void do_it(GCTaskManager* manager, uint which) { _enq_task.work(_work_id); } }; // // RefProcTaskExecutor // // Task executor is an interface for the reference processor to run // tasks using GCTaskManager. // class RefProcTaskExecutor: public AbstractRefProcTaskExecutor { virtual void execute(ProcessTask& task); virtual void execute(EnqueueTask& task); }; // // StealMarkingTask // // This task is used to distribute work to idle threads. // class StealMarkingTask : public GCTask { private: ParallelTaskTerminator* const _terminator; private: public: char* name() { return (char *)"steal-marking-task"; } StealMarkingTask(ParallelTaskTerminator* t); ParallelTaskTerminator* terminator() { return _terminator; } virtual void do_it(GCTaskManager* manager, uint which); }; // // StealRegionCompactionTask // // This task is used to distribute work to idle threads. // class StealRegionCompactionTask : public GCTask { private: ParallelTaskTerminator* const _terminator; public: StealRegionCompactionTask(ParallelTaskTerminator* t); char* name() { return (char *)"steal-region-task"; } ParallelTaskTerminator* terminator() { return _terminator; } virtual void do_it(GCTaskManager* manager, uint which); }; // // UpdateDensePrefixTask // // This task is used to update the dense prefix // of a space. // class UpdateDensePrefixTask : public GCTask { private: PSParallelCompact::SpaceId _space_id; size_t _region_index_start; size_t _region_index_end; public: char* name() { return (char *)"update-dense_prefix-task"; } UpdateDensePrefixTask(PSParallelCompact::SpaceId space_id, size_t region_index_start, size_t region_index_end); virtual void do_it(GCTaskManager* manager, uint which); }; // // DrainStacksCompactionTask // // This task processes regions that have been added to the stacks of each // compaction manager. // // Trying to use one draining thread does not work because there are no // guarantees about which task will be picked up by which thread. For example, // if thread A gets all the preloaded regions, thread A may not get a draining // task (they may all be done by other threads). // class DrainStacksCompactionTask : public GCTask { uint _stack_index; uint stack_index() { return _stack_index; } public: DrainStacksCompactionTask(uint stack_index) : GCTask(), _stack_index(stack_index) {}; char* name() { return (char *)"drain-region-task"; } virtual void do_it(GCTaskManager* manager, uint which); }; #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PCTASKS_HPP