jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@8b10f48633dc

6984287: Regularize how GC parallel workers are specified.
Summary: Associate number of GC workers with the workgang as opposed to the task.
Reviewed-by: johnc, ysr

     1 /*

     2  * Copyright (c) 2005, 2009, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_pcTasks.cpp.incl"

    28 //

    29 // ThreadRootsMarkingTask

    30 //

    32 void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) {

    33   assert(Universe::heap()->is_gc_active(), "called outside gc");

    35   ResourceMark rm;

    37   NOT_PRODUCT(TraceTime tm("ThreadRootsMarkingTask",

    38     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

    39   ParCompactionManager* cm =

    40     ParCompactionManager::gc_thread_compaction_manager(which);

    41   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    42   CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true);

    44   if (_java_thread != NULL)

    45     _java_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs);

    47   if (_vm_thread != NULL)

    48     _vm_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs);

    50   // Do the real work

    51   cm->follow_marking_stacks();

    52 }

    55 void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {

    56   assert(Universe::heap()->is_gc_active(), "called outside gc");

    58   NOT_PRODUCT(TraceTime tm("MarkFromRootsTask",

    59     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

    60   ParCompactionManager* cm =

    61     ParCompactionManager::gc_thread_compaction_manager(which);

    62   assert(cm->stacks_have_been_allocated(),

    63          "Stack space has not been allocated");

    64   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    66   switch (_root_type) {

    67     case universe:

    68       Universe::oops_do(&mark_and_push_closure);

    69       break;

    71     case reference_processing:

    72       ReferenceProcessor::oops_do(&mark_and_push_closure);

    73       break;

    75     case jni_handles:

    76       JNIHandles::oops_do(&mark_and_push_closure);

    77       break;

    79     case threads:

    80     {

    81       ResourceMark rm;

    82       CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true);

    83       Threads::oops_do(&mark_and_push_closure, &each_active_code_blob);

    84     }

    85     break;

    87     case object_synchronizer:

    88       ObjectSynchronizer::oops_do(&mark_and_push_closure);

    89       break;

    91     case flat_profiler:

    92       FlatProfiler::oops_do(&mark_and_push_closure);

    93       break;

    95     case management:

    96       Management::oops_do(&mark_and_push_closure);

    97       break;

    99     case jvmti:

   100       JvmtiExport::oops_do(&mark_and_push_closure);

   101       break;

   103     case system_dictionary:

   104       SystemDictionary::always_strong_oops_do(&mark_and_push_closure);

   105       break;

   107     case vm_symbols:

   108       vmSymbols::oops_do(&mark_and_push_closure);

   109       break;

   111     case code_cache:

   112       // Do not treat nmethods as strong roots for mark/sweep, since we can unload them.

   113       //CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure));

   114       break;

   116     default:

   117       fatal("Unknown root type");

   118   }

   120   // Do the real work

   121   cm->follow_marking_stacks();

   122   // cm->deallocate_stacks();

   123 }

   126 //

   127 // RefProcTaskProxy

   128 //

   130 void RefProcTaskProxy::do_it(GCTaskManager* manager, uint which)

   131 {

   132   assert(Universe::heap()->is_gc_active(), "called outside gc");

   134   NOT_PRODUCT(TraceTime tm("RefProcTask",

   135     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   136   ParCompactionManager* cm =

   137     ParCompactionManager::gc_thread_compaction_manager(which);

   138   assert(cm->stacks_have_been_allocated(),

   139          "Stack space has not been allocated");

   140   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   141   PSParallelCompact::FollowStackClosure follow_stack_closure(cm);

   142   _rp_task.work(_work_id, *PSParallelCompact::is_alive_closure(),

   143                 mark_and_push_closure, follow_stack_closure);

   144 }

   146 //

   147 // RefProcTaskExecutor

   148 //

   150 void RefProcTaskExecutor::execute(ProcessTask& task)

   151 {

   152   ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();

   153   uint parallel_gc_threads = heap->gc_task_manager()->workers();

   154   RegionTaskQueueSet* qset = ParCompactionManager::region_array();

   155   ParallelTaskTerminator terminator(parallel_gc_threads, qset);

   156   GCTaskQueue* q = GCTaskQueue::create();

   157   for(uint i=0; i<parallel_gc_threads; i++) {

   158     q->enqueue(new RefProcTaskProxy(task, i));

   159   }

   160   if (task.marks_oops_alive()) {

   161     if (parallel_gc_threads>1) {

   162       for (uint j=0; j<parallel_gc_threads; j++) {

   163         q->enqueue(new StealMarkingTask(&terminator));

   164       }

   165     }

   166   }

   167   PSParallelCompact::gc_task_manager()->execute_and_wait(q);

   168 }

   170 void RefProcTaskExecutor::execute(EnqueueTask& task)

   171 {

   172   ParallelScavengeHeap* heap = PSParallelCompact::gc_heap();

   173   uint parallel_gc_threads = heap->gc_task_manager()->workers();

   174   GCTaskQueue* q = GCTaskQueue::create();

   175   for(uint i=0; i<parallel_gc_threads; i++) {

   176     q->enqueue(new RefEnqueueTaskProxy(task, i));

   177   }

   178   PSParallelCompact::gc_task_manager()->execute_and_wait(q);

   179 }

   181 //

   182 // StealMarkingTask

   183 //

   185 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :

   186   _terminator(t) {}

   188 void StealMarkingTask::do_it(GCTaskManager* manager, uint which) {

   189   assert(Universe::heap()->is_gc_active(), "called outside gc");

   191   NOT_PRODUCT(TraceTime tm("StealMarkingTask",

   192     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   194   ParCompactionManager* cm =

   195     ParCompactionManager::gc_thread_compaction_manager(which);

   196   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   198   oop obj = NULL;

   199   ObjArrayTask task;

   200   int random_seed = 17;

   201   do {

   202     while (ParCompactionManager::steal_objarray(which, &random_seed, task)) {

   203       objArrayKlass* const k = (objArrayKlass*)task.obj()->blueprint();

   204       k->oop_follow_contents(cm, task.obj(), task.index());

   205       cm->follow_marking_stacks();

   206     }

   207     while (ParCompactionManager::steal(which, &random_seed, obj)) {

   208       obj->follow_contents(cm);

   209       cm->follow_marking_stacks();

   210     }

   211   } while (!terminator()->offer_termination());

   212 }

   214 //

   215 // StealRegionCompactionTask

   216 //

   219 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t):

   220   _terminator(t) {}

   222 void StealRegionCompactionTask::do_it(GCTaskManager* manager, uint which) {

   223   assert(Universe::heap()->is_gc_active(), "called outside gc");

   225   NOT_PRODUCT(TraceTime tm("StealRegionCompactionTask",

   226     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   228   ParCompactionManager* cm =

   229     ParCompactionManager::gc_thread_compaction_manager(which);

   231   // Has to drain stacks first because there may be regions on

   232   // preloaded onto the stack and this thread may never have

   233   // done a draining task.  Are the draining tasks needed?

   235   cm->drain_region_stacks();

   237   size_t region_index = 0;

   238   int random_seed = 17;

   240   // If we're the termination task, try 10 rounds of stealing before

   241   // setting the termination flag

   243   while(true) {

   244     if (ParCompactionManager::steal(which, &random_seed, region_index)) {

   245       PSParallelCompact::fill_and_update_region(cm, region_index);

   246       cm->drain_region_stacks();

   247     } else {

   248       if (terminator()->offer_termination()) {

   249         break;

   250       }

   251       // Go around again.

   252     }

   253   }

   254   return;

   255 }

   257 UpdateDensePrefixTask::UpdateDensePrefixTask(

   258                                    PSParallelCompact::SpaceId space_id,

   259                                    size_t region_index_start,

   260                                    size_t region_index_end) :

   261   _space_id(space_id), _region_index_start(region_index_start),

   262   _region_index_end(region_index_end) {}

   264 void UpdateDensePrefixTask::do_it(GCTaskManager* manager, uint which) {

   266   NOT_PRODUCT(TraceTime tm("UpdateDensePrefixTask",

   267     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   269   ParCompactionManager* cm =

   270     ParCompactionManager::gc_thread_compaction_manager(which);

   272   PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,

   273                                                          _space_id,

   274                                                          _region_index_start,

   275                                                          _region_index_end);

   276 }

   278 void DrainStacksCompactionTask::do_it(GCTaskManager* manager, uint which) {

   279   assert(Universe::heap()->is_gc_active(), "called outside gc");

   281   NOT_PRODUCT(TraceTime tm("DrainStacksCompactionTask",

   282     PrintGCDetails && TraceParallelOldGCTasks, true, gclog_or_tty));

   284   ParCompactionManager* cm =

   285     ParCompactionManager::gc_thread_compaction_manager(which);

   287   // Process any regions already in the compaction managers stacks.

   288   cm->drain_region_stacks();

   289 }

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@8b10f48633dc

src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp