jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp@3a4805ad0005

8015244: G1: Verification after a full GC is incorrectly placed.
Summary: In a full GC, move the verification after the GC to after RSet rebuilding. Verify RSet entries during a full GC under control of a flag.
Reviewed-by: tschatzl, brutisso

     1 /*

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     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.

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     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

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    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

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    23  */

    25 #include "precompiled.hpp"

    26 #include "gc_implementation/g1/concurrentG1Refine.hpp"

    27 #include "gc_implementation/g1/concurrentG1RefineThread.hpp"

    28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"

    29 #include "gc_implementation/g1/g1HotCardCache.hpp"

    31 ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) :

    32   _threads(NULL), _n_threads(0),

    33   _hot_card_cache(g1h)

    34 {

    35   // Ergomonically select initial concurrent refinement parameters

    36   if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) {

    37     FLAG_SET_DEFAULT(G1ConcRefinementGreenZone, MAX2<int>(ParallelGCThreads, 1));

    38   }

    39   set_green_zone(G1ConcRefinementGreenZone);

    41   if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) {

    42     FLAG_SET_DEFAULT(G1ConcRefinementYellowZone, green_zone() * 3);

    43   }

    44   set_yellow_zone(MAX2<int>(G1ConcRefinementYellowZone, green_zone()));

    46   if (FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) {

    47     FLAG_SET_DEFAULT(G1ConcRefinementRedZone, yellow_zone() * 2);

    48   }

    49   set_red_zone(MAX2<int>(G1ConcRefinementRedZone, yellow_zone()));

    51   _n_worker_threads = thread_num();

    52   // We need one extra thread to do the young gen rset size sampling.

    53   _n_threads = _n_worker_threads + 1;

    55   reset_threshold_step();

    57   _threads = NEW_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _n_threads, mtGC);

    59   int worker_id_offset = (int)DirtyCardQueueSet::num_par_ids();

    61   ConcurrentG1RefineThread *next = NULL;

    62   for (int i = _n_threads - 1; i >= 0; i--) {

    63     ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, worker_id_offset, i);

    64     assert(t != NULL, "Conc refine should have been created");

    65     assert(t->cg1r() == this, "Conc refine thread should refer to this");

    66     _threads[i] = t;

    67     next = t;

    68   }

    69 }

    71 void ConcurrentG1Refine::reset_threshold_step() {

    72   if (FLAG_IS_DEFAULT(G1ConcRefinementThresholdStep)) {

    73     _thread_threshold_step = (yellow_zone() - green_zone()) / (worker_thread_num() + 1);

    74   } else {

    75     _thread_threshold_step = G1ConcRefinementThresholdStep;

    76   }

    77 }

    79 void ConcurrentG1Refine::init() {

    80   _hot_card_cache.initialize();

    81 }

    83 void ConcurrentG1Refine::stop() {

    84   if (_threads != NULL) {

    85     for (int i = 0; i < _n_threads; i++) {

    86       _threads[i]->stop();

    87     }

    88   }

    89 }

    91 void ConcurrentG1Refine::reinitialize_threads() {

    92   reset_threshold_step();

    93   if (_threads != NULL) {

    94     for (int i = 0; i < _n_threads; i++) {

    95       _threads[i]->initialize();

    96     }

    97   }

    98 }

   100 ConcurrentG1Refine::~ConcurrentG1Refine() {

   101   if (_threads != NULL) {

   102     for (int i = 0; i < _n_threads; i++) {

   103       delete _threads[i];

   104     }

   105     FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads, mtGC);

   106   }

   107 }

   109 void ConcurrentG1Refine::threads_do(ThreadClosure *tc) {

   110   if (_threads != NULL) {

   111     for (int i = 0; i < _n_threads; i++) {

   112       tc->do_thread(_threads[i]);

   113     }

   114   }

   115 }

   117 void ConcurrentG1Refine::worker_threads_do(ThreadClosure * tc) {

   118   if (_threads != NULL) {

   119     for (int i = 0; i < worker_thread_num(); i++) {

   120       tc->do_thread(_threads[i]);

   121     }

   122   }

   123 }

   125 int ConcurrentG1Refine::thread_num() {

   126   int n_threads = (G1ConcRefinementThreads > 0) ? G1ConcRefinementThreads

   127                                                 : ParallelGCThreads;

   128   return MAX2<int>(n_threads, 1);

   129 }

   131 void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const {

   132   for (int i = 0; i < _n_threads; ++i) {

   133     _threads[i]->print_on(st);

   134     st->cr();

   135   }

   136 }

   138 ConcurrentG1RefineThread * ConcurrentG1Refine::sampling_thread() const {

   139   return _threads[worker_thread_num()];

   140 }

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

src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp@3a4805ad0005

src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp