ysr@777: /*
johnc@5078:  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "gc_implementation/g1/concurrentG1Refine.hpp"
stefank@2314: #include "gc_implementation/g1/concurrentG1RefineThread.hpp"
stefank@2314: #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
johnc@5078: #include "gc_implementation/g1/g1HotCardCache.hpp"
ehelin@6168: #include "runtime/java.hpp"
ysr@777: 
tschatzl@6930: ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h, CardTableEntryClosure* refine_closure) :
johnc@5078:   _threads(NULL), _n_threads(0),
johnc@5078:   _hot_card_cache(g1h)
ysr@777: {
iveresov@1546:   // Ergomonically select initial concurrent refinement parameters
tonyp@1717:   if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) {
tonyp@1717:     FLAG_SET_DEFAULT(G1ConcRefinementGreenZone, MAX2<int>(ParallelGCThreads, 1));
iveresov@1546:   }
tonyp@1717:   set_green_zone(G1ConcRefinementGreenZone);
iveresov@1546: 
tonyp@1717:   if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) {
tonyp@1717:     FLAG_SET_DEFAULT(G1ConcRefinementYellowZone, green_zone() * 3);
iveresov@1546:   }
tonyp@1717:   set_yellow_zone(MAX2<int>(G1ConcRefinementYellowZone, green_zone()));
iveresov@1546: 
tonyp@1717:   if (FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) {
tonyp@1717:     FLAG_SET_DEFAULT(G1ConcRefinementRedZone, yellow_zone() * 2);
iveresov@1546:   }
tonyp@1717:   set_red_zone(MAX2<int>(G1ConcRefinementRedZone, yellow_zone()));
johnc@5078: 
iveresov@1546:   _n_worker_threads = thread_num();
iveresov@1546:   // We need one extra thread to do the young gen rset size sampling.
iveresov@1546:   _n_threads = _n_worker_threads + 1;
johnc@5078: 
iveresov@1546:   reset_threshold_step();
iveresov@1546: 
zgu@3900:   _threads = NEW_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _n_threads, mtGC);
johnc@5078: 
vkempik@6552:   uint worker_id_offset = DirtyCardQueueSet::num_par_ids();
johnc@5078: 
iveresov@1546:   ConcurrentG1RefineThread *next = NULL;
vkempik@6552:   for (uint i = _n_threads - 1; i != UINT_MAX; i--) {
tschatzl@6930:     ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, refine_closure, worker_id_offset, i);
iveresov@1546:     assert(t != NULL, "Conc refine should have been created");
ehelin@6168:     if (t->osthread() == NULL) {
ehelin@6168:         vm_shutdown_during_initialization("Could not create ConcurrentG1RefineThread");
ehelin@6168:     }
ehelin@6168: 
iveresov@1546:     assert(t->cg1r() == this, "Conc refine thread should refer to this");
iveresov@1546:     _threads[i] = t;
iveresov@1546:     next = t;
ysr@777:   }
ysr@777: }
ysr@777: 
iveresov@1546: void ConcurrentG1Refine::reset_threshold_step() {
tonyp@1717:   if (FLAG_IS_DEFAULT(G1ConcRefinementThresholdStep)) {
iveresov@1546:     _thread_threshold_step = (yellow_zone() - green_zone()) / (worker_thread_num() + 1);
iveresov@1546:   } else {
tonyp@1717:     _thread_threshold_step = G1ConcRefinementThresholdStep;
iveresov@1230:   }
iveresov@1546: }
iveresov@1546: 
tschatzl@7051: void ConcurrentG1Refine::init(G1RegionToSpaceMapper* card_counts_storage) {
tschatzl@7051:   _hot_card_cache.initialize(card_counts_storage);
ysr@777: }
ysr@777: 
iveresov@1229: void ConcurrentG1Refine::stop() {
iveresov@1229:   if (_threads != NULL) {
vkempik@6552:     for (uint i = 0; i < _n_threads; i++) {
iveresov@1229:       _threads[i]->stop();
iveresov@1229:     }
iveresov@1229:   }
iveresov@1229: }
iveresov@1229: 
iveresov@1546: void ConcurrentG1Refine::reinitialize_threads() {
iveresov@1546:   reset_threshold_step();
iveresov@1546:   if (_threads != NULL) {
vkempik@6552:     for (uint i = 0; i < _n_threads; i++) {
iveresov@1546:       _threads[i]->initialize();
iveresov@1546:     }
iveresov@1546:   }
iveresov@1546: }
iveresov@1546: 
ysr@777: ConcurrentG1Refine::~ConcurrentG1Refine() {
iveresov@1229:   if (_threads != NULL) {
vkempik@6552:     for (uint i = 0; i < _n_threads; i++) {
iveresov@1229:       delete _threads[i];
iveresov@1229:     }
zgu@3900:     FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads, mtGC);
ysr@777:   }
ysr@777: }
ysr@777: 
iveresov@1229: void ConcurrentG1Refine::threads_do(ThreadClosure *tc) {
iveresov@1229:   if (_threads != NULL) {
vkempik@6552:     for (uint i = 0; i < _n_threads; i++) {
iveresov@1229:       tc->do_thread(_threads[i]);
iveresov@1229:     }
ysr@777:   }
ysr@777: }
ysr@777: 
tschatzl@5204: void ConcurrentG1Refine::worker_threads_do(ThreadClosure * tc) {
tschatzl@5204:   if (_threads != NULL) {
vkempik@6552:     for (uint i = 0; i < worker_thread_num(); i++) {
tschatzl@5204:       tc->do_thread(_threads[i]);
tschatzl@5204:     }
tschatzl@5204:   }
tschatzl@5204: }
tschatzl@5204: 
vkempik@6552: uint ConcurrentG1Refine::thread_num() {
jwilhelm@7219:   return G1ConcRefinementThreads;
ysr@777: }
tonyp@1454: 
tonyp@1454: void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const {
vkempik@6552:   for (uint i = 0; i < _n_threads; ++i) {
tonyp@1454:     _threads[i]->print_on(st);
tonyp@1454:     st->cr();
tonyp@1454:   }
tonyp@1454: }
tschatzl@5204: 
tschatzl@5204: ConcurrentG1RefineThread * ConcurrentG1Refine::sampling_thread() const {
tschatzl@5204:   return _threads[worker_thread_num()];
tschatzl@5204: }