1 /*
   2  * Copyright (c) 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  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "gc/g1/g1NUMA.hpp"
  27 #include "gc/g1/g1RegionsOnNodes.hpp"
  28 #include "gc/g1/heapRegion.hpp"
  29 
  30 G1RegionsOnNodes::G1RegionsOnNodes() : _count_per_node(NULL), _numa(G1NUMA::numa()) {
  31   _count_per_node = NEW_C_HEAP_ARRAY(uint, _numa->num_active_nodes(), mtGC);
  32   clear();
  33 }
  34 
  35 G1RegionsOnNodes::~G1RegionsOnNodes() {
  36   FREE_C_HEAP_ARRAY(uint, _count_per_node);
  37 }
  38 
  39 uint G1RegionsOnNodes::add(HeapRegion* hr) {
  40   uint node_index = hr->node_index();
  41 
  42   // Update only if the node index is valid.
  43   if (node_index < _numa->num_active_nodes()) {
  44     *(_count_per_node + node_index) += 1;
  45     return node_index;
  46   }
  47 
  48   return G1NUMA::UnknownNodeIndex;
  49 }
  50 
  51 void G1RegionsOnNodes::clear() {
  52   for (uint i = 0; i < _numa->num_active_nodes(); i++) {
  53     _count_per_node[i] = 0;
  54   }
  55 }
  56 
  57 uint G1RegionsOnNodes::count(uint node_index) const {
  58   return _count_per_node[node_index];
  59 }