jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@9766f73e770d

8022880: False sharing between PSPromotionManager instances
Summary: Pad the PSPromotionManager instances in the manager array.
Reviewed-by: brutisso, jmasa

     1 /*

     2  * Copyright (c) 2005, 2013, 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 "precompiled.hpp"

    26 #include "classfile/systemDictionary.hpp"

    27 #include "code/codeCache.hpp"

    28 #include "gc_implementation/parallelScavenge/pcTasks.hpp"

    29 #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"

    30 #include "gc_implementation/shared/gcTimer.hpp"

    31 #include "gc_implementation/shared/gcTraceTime.hpp"

    32 #include "gc_interface/collectedHeap.hpp"

    33 #include "memory/universe.hpp"

    34 #include "oops/objArrayKlass.inline.hpp"

    35 #include "oops/oop.inline.hpp"

    36 #include "oops/oop.pcgc.inline.hpp"

    37 #include "prims/jvmtiExport.hpp"

    38 #include "runtime/fprofiler.hpp"

    39 #include "runtime/jniHandles.hpp"

    40 #include "runtime/thread.hpp"

    41 #include "runtime/vmThread.hpp"

    42 #include "services/management.hpp"

    44 //

    45 // ThreadRootsMarkingTask

    46 //

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

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

    51   ResourceMark rm;

    53   NOT_PRODUCT(GCTraceTime tm("ThreadRootsMarkingTask",

    54     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

    55   ParCompactionManager* cm =

    56     ParCompactionManager::gc_thread_compaction_manager(which);

    58   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    59   CLDToOopClosure mark_and_push_from_clds(&mark_and_push_closure, true);

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

    62   if (_java_thread != NULL)

    63     _java_thread->oops_do(

    64         &mark_and_push_closure,

    65         &mark_and_push_from_clds,

    66         &mark_and_push_in_blobs);

    68   if (_vm_thread != NULL)

    69     _vm_thread->oops_do(

    70         &mark_and_push_closure,

    71         &mark_and_push_from_clds,

    72         &mark_and_push_in_blobs);

    74   // Do the real work

    75   cm->follow_marking_stacks();

    76 }

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

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

    82   NOT_PRODUCT(GCTraceTime tm("MarkFromRootsTask",

    83     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

    84   ParCompactionManager* cm =

    85     ParCompactionManager::gc_thread_compaction_manager(which);

    86   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

    87   PSParallelCompact::FollowKlassClosure follow_klass_closure(&mark_and_push_closure);

    89   switch (_root_type) {

    90     case universe:

    91       Universe::oops_do(&mark_and_push_closure);

    92       break;

    94     case jni_handles:

    95       JNIHandles::oops_do(&mark_and_push_closure);

    96       break;

    98     case threads:

    99     {

   100       ResourceMark rm;

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

   102       CLDToOopClosure mark_and_push_from_cld(&mark_and_push_closure);

   103       Threads::oops_do(&mark_and_push_closure, &mark_and_push_from_cld, &each_active_code_blob);

   104     }

   105     break;

   107     case object_synchronizer:

   108       ObjectSynchronizer::oops_do(&mark_and_push_closure);

   109       break;

   111     case flat_profiler:

   112       FlatProfiler::oops_do(&mark_and_push_closure);

   113       break;

   115     case management:

   116       Management::oops_do(&mark_and_push_closure);

   117       break;

   119     case jvmti:

   120       JvmtiExport::oops_do(&mark_and_push_closure);

   121       break;

   123     case system_dictionary:

   124       SystemDictionary::always_strong_oops_do(&mark_and_push_closure);

   125       break;

   127     case class_loader_data:

   128       ClassLoaderDataGraph::always_strong_oops_do(&mark_and_push_closure, &follow_klass_closure, true);

   129       break;

   131     case code_cache:

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

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

   134       break;

   136     default:

   137       fatal("Unknown root type");

   138   }

   140   // Do the real work

   141   cm->follow_marking_stacks();

   142 }

   145 //

   146 // RefProcTaskProxy

   147 //

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

   150 {

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

   153   NOT_PRODUCT(GCTraceTime tm("RefProcTask",

   154     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

   155   ParCompactionManager* cm =

   156     ParCompactionManager::gc_thread_compaction_manager(which);

   157   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   158   PSParallelCompact::FollowStackClosure follow_stack_closure(cm);

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

   160                 mark_and_push_closure, follow_stack_closure);

   161 }

   163 //

   164 // RefProcTaskExecutor

   165 //

   167 void RefProcTaskExecutor::execute(ProcessTask& task)

   168 {

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

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

   171   uint active_gc_threads = heap->gc_task_manager()->active_workers();

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

   173   ParallelTaskTerminator terminator(active_gc_threads, qset);

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

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

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

   177   }

   178   if (task.marks_oops_alive()) {

   179     if (parallel_gc_threads>1) {

   180       for (uint j=0; j<active_gc_threads; j++) {

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

   182       }

   183     }

   184   }

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

   186 }

   188 void RefProcTaskExecutor::execute(EnqueueTask& task)

   189 {

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

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

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

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

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

   195   }

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

   197 }

   199 //

   200 // StealMarkingTask

   201 //

   203 StealMarkingTask::StealMarkingTask(ParallelTaskTerminator* t) :

   204   _terminator(t) {}

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

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

   209   NOT_PRODUCT(GCTraceTime tm("StealMarkingTask",

   210     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

   212   ParCompactionManager* cm =

   213     ParCompactionManager::gc_thread_compaction_manager(which);

   214   PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);

   216   oop obj = NULL;

   217   ObjArrayTask task;

   218   int random_seed = 17;

   219   do {

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

   221       ObjArrayKlass* k = (ObjArrayKlass*)task.obj()->klass();

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

   223       cm->follow_marking_stacks();

   224     }

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

   226       obj->follow_contents(cm);

   227       cm->follow_marking_stacks();

   228     }

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

   230 }

   232 //

   233 // StealRegionCompactionTask

   234 //

   236 StealRegionCompactionTask::StealRegionCompactionTask(ParallelTaskTerminator* t):

   237   _terminator(t) {}

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

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

   242   NOT_PRODUCT(GCTraceTime tm("StealRegionCompactionTask",

   243     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

   245   ParCompactionManager* cm =

   246     ParCompactionManager::gc_thread_compaction_manager(which);

   249   // If not all threads are active, get a draining stack

   250   // from the list.  Else, just use this threads draining stack.

   251   uint which_stack_index;

   252   bool use_all_workers = manager->all_workers_active();

   253   if (use_all_workers) {

   254     which_stack_index = which;

   255     assert(manager->active_workers() == ParallelGCThreads,

   256            err_msg("all_workers_active has been incorrectly set: "

   257                    " active %d  ParallelGCThreads %d", manager->active_workers(),

   258                    ParallelGCThreads));

   259   } else {

   260     which_stack_index = ParCompactionManager::pop_recycled_stack_index();

   261   }

   263   cm->set_region_stack_index(which_stack_index);

   264   cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));

   265   if (TraceDynamicGCThreads) {

   266     gclog_or_tty->print_cr("StealRegionCompactionTask::do_it "

   267                            "region_stack_index %d region_stack = 0x%x "

   268                            " empty (%d) use all workers %d",

   269     which_stack_index, ParCompactionManager::region_list(which_stack_index),

   270     cm->region_stack()->is_empty(),

   271     use_all_workers);

   272   }

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

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

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

   278   cm->drain_region_stacks();

   280   size_t region_index = 0;

   281   int random_seed = 17;

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

   284   // setting the termination flag

   286   while(true) {

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

   288       PSParallelCompact::fill_and_update_region(cm, region_index);

   289       cm->drain_region_stacks();

   290     } else {

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

   292         break;

   293       }

   294       // Go around again.

   295     }

   296   }

   297   return;

   298 }

   300 UpdateDensePrefixTask::UpdateDensePrefixTask(

   301                                    PSParallelCompact::SpaceId space_id,

   302                                    size_t region_index_start,

   303                                    size_t region_index_end) :

   304   _space_id(space_id), _region_index_start(region_index_start),

   305   _region_index_end(region_index_end) {}

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

   309   NOT_PRODUCT(GCTraceTime tm("UpdateDensePrefixTask",

   310     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

   312   ParCompactionManager* cm =

   313     ParCompactionManager::gc_thread_compaction_manager(which);

   315   PSParallelCompact::update_and_deadwood_in_dense_prefix(cm,

   316                                                          _space_id,

   317                                                          _region_index_start,

   318                                                          _region_index_end);

   319 }

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

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

   324   NOT_PRODUCT(GCTraceTime tm("DrainStacksCompactionTask",

   325     PrintGCDetails && TraceParallelOldGCTasks, true, NULL));

   327   ParCompactionManager* cm =

   328     ParCompactionManager::gc_thread_compaction_manager(which);

   330   uint which_stack_index;

   331   bool use_all_workers = manager->all_workers_active();

   332   if (use_all_workers) {

   333     which_stack_index = which;

   334     assert(manager->active_workers() == ParallelGCThreads,

   335            err_msg("all_workers_active has been incorrectly set: "

   336                    " active %d  ParallelGCThreads %d", manager->active_workers(),

   337                    ParallelGCThreads));

   338   } else {

   339     which_stack_index = stack_index();

   340   }

   342   cm->set_region_stack(ParCompactionManager::region_list(which_stack_index));

   343   if (TraceDynamicGCThreads) {

   344     gclog_or_tty->print_cr("DrainStacksCompactionTask::do_it which = %d "

   345                            "which_stack_index = %d/empty(%d) "

   346                            "use all workers %d",

   347                            which, which_stack_index,

   348                            cm->region_stack()->is_empty(),

   349                            use_all_workers);

   350   }

   352   cm->set_region_stack_index(which_stack_index);

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

   355   cm->drain_region_stacks();

   357   assert(cm->region_stack()->is_empty(), "Not empty");

   359   if (!use_all_workers) {

   360     // Always give up the region stack.

   361     assert(cm->region_stack() ==

   362            ParCompactionManager::region_list(cm->region_stack_index()),

   363            "region_stack and region_stack_index are inconsistent");

   364     ParCompactionManager::push_recycled_stack_index(cm->region_stack_index());

   366     if (TraceDynamicGCThreads) {

   367       void* old_region_stack = (void*) cm->region_stack();

   368       int old_region_stack_index = cm->region_stack_index();

   369       gclog_or_tty->print_cr("Pushing region stack 0x%x/%d",

   370         old_region_stack, old_region_stack_index);

   371     }

   373     cm->set_region_stack(NULL);

   374     cm->set_region_stack_index((uint)max_uintx);

   375   }

   376 }

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

src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp@9766f73e770d

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