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src/hotspot/share/gc/g1/g1ConcurrentRefine.cpp

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rev 57716 : imported patch remove_cbl_mon
   1 /*
   2  * Copyright (c) 2001, 2019, 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  *


  72   _cr = cr;
  73   _num_max_threads = num_max_threads;
  74 
  75   _threads = NEW_C_HEAP_ARRAY_RETURN_NULL(G1ConcurrentRefineThread*, num_max_threads, mtGC);
  76   if (_threads == NULL) {
  77     vm_shutdown_during_initialization("Could not allocate thread holder array.");
  78     return JNI_ENOMEM;
  79   }
  80 
  81   for (uint i = 0; i < num_max_threads; i++) {
  82     if (UseDynamicNumberOfGCThreads && i != 0 /* Always start first thread. */) {
  83       _threads[i] = NULL;
  84     } else {
  85       _threads[i] = create_refinement_thread(i, true);
  86       if (_threads[i] == NULL) {
  87         vm_shutdown_during_initialization("Could not allocate refinement threads.");
  88         return JNI_ENOMEM;
  89       }
  90     }
  91   }





  92   return JNI_OK;
  93 }
  94 
  95 void G1ConcurrentRefineThreadControl::maybe_activate_next(uint cur_worker_id) {
  96   assert(cur_worker_id < _num_max_threads,
  97          "Activating another thread from %u not allowed since there can be at most %u",
  98          cur_worker_id, _num_max_threads);
  99   if (cur_worker_id == (_num_max_threads - 1)) {
 100     // Already the last thread, there is no more thread to activate.
 101     return;
 102   }
 103 
 104   uint worker_id = cur_worker_id + 1;
 105   G1ConcurrentRefineThread* thread_to_activate = _threads[worker_id];
 106   if (thread_to_activate == NULL) {
 107     // Still need to create the thread...
 108     _threads[worker_id] = create_refinement_thread(worker_id, false);
 109     thread_to_activate = _threads[worker_id];
 110   }
 111   if (thread_to_activate != NULL && !thread_to_activate->is_active()) {
 112     thread_to_activate->activate();
 113   }
 114 }
 115 
 116 void G1ConcurrentRefineThreadControl::print_on(outputStream* st) const {
 117   for (uint i = 0; i < _num_max_threads; ++i) {
 118     if (_threads[i] != NULL) {
 119       _threads[i]->print_on(st);
 120       st->cr();
 121     }
 122   }
 123 }
 124 
 125 void G1ConcurrentRefineThreadControl::worker_threads_do(ThreadClosure* tc) {
 126   for (uint i = 0; i < _num_max_threads; i++) {
 127     if (_threads[i] != NULL) {
 128       tc->do_thread(_threads[i]);
 129     }
 130   }
 131 }


   1 /*
   2  * Copyright (c) 2001, 2020, 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  *


  72   _cr = cr;
  73   _num_max_threads = num_max_threads;
  74 
  75   _threads = NEW_C_HEAP_ARRAY_RETURN_NULL(G1ConcurrentRefineThread*, num_max_threads, mtGC);
  76   if (_threads == NULL) {
  77     vm_shutdown_during_initialization("Could not allocate thread holder array.");
  78     return JNI_ENOMEM;
  79   }
  80 
  81   for (uint i = 0; i < num_max_threads; i++) {
  82     if (UseDynamicNumberOfGCThreads && i != 0 /* Always start first thread. */) {
  83       _threads[i] = NULL;
  84     } else {
  85       _threads[i] = create_refinement_thread(i, true);
  86       if (_threads[i] == NULL) {
  87         vm_shutdown_during_initialization("Could not allocate refinement threads.");
  88         return JNI_ENOMEM;
  89       }
  90     }
  91   }
  92 
  93   if (num_max_threads > 0) {
  94     G1BarrierSet::dirty_card_queue_set().set_primary_refinement_thread(_threads[0]);
  95   }
  96 
  97   return JNI_OK;
  98 }
  99 
 100 void G1ConcurrentRefineThreadControl::maybe_activate_next(uint cur_worker_id) {
 101   assert(cur_worker_id < _num_max_threads,
 102          "Activating another thread from %u not allowed since there can be at most %u",
 103          cur_worker_id, _num_max_threads);
 104   if (cur_worker_id == (_num_max_threads - 1)) {
 105     // Already the last thread, there is no more thread to activate.
 106     return;
 107   }
 108 
 109   uint worker_id = cur_worker_id + 1;
 110   G1ConcurrentRefineThread* thread_to_activate = _threads[worker_id];
 111   if (thread_to_activate == NULL) {
 112     // Still need to create the thread...
 113     _threads[worker_id] = create_refinement_thread(worker_id, false);
 114     thread_to_activate = _threads[worker_id];
 115   }
 116   if (thread_to_activate != NULL) {
 117     thread_to_activate->activate();
 118   }
 119 }
 120 
 121 void G1ConcurrentRefineThreadControl::print_on(outputStream* st) const {
 122   for (uint i = 0; i < _num_max_threads; ++i) {
 123     if (_threads[i] != NULL) {
 124       _threads[i]->print_on(st);
 125       st->cr();
 126     }
 127   }
 128 }
 129 
 130 void G1ConcurrentRefineThreadControl::worker_threads_do(ThreadClosure* tc) {
 131   for (uint i = 0; i < _num_max_threads; i++) {
 132     if (_threads[i] != NULL) {
 133       tc->do_thread(_threads[i]);
 134     }
 135   }
 136 }


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