--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/g1/g1NUMAStats.hpp	Wed Nov 13 10:51:41 2019 -0800
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_G1_NODE_TIMES_HPP
+#define SHARE_VM_GC_G1_NODE_TIMES_HPP
+
+#include "memory/allocation.hpp"
+
+// Manages statistics of multi nodes.
+class G1NUMAStats : public CHeapObj<mtGC> {
+  struct Stat {
+    // Hit count: if requested id equals to returned id.
+    size_t _hit;
+    // Total request count
+    size_t _requested;
+
+    // Hit count / total request count
+    double rate() const;
+  };
+
+  // Holds data array which has a size of (node count) * (node count + 1) to
+  // represent request node * allocated node. The request node includes any node case.
+  // All operations are NOT thread-safe.
+  // The row index indicates a requested node index while the column node index
+  // indicates an allocated node index. The last row is for any node index request.
+  // E.g. (req, alloc) = (0,0) (1,0) (2,0) (0,1) (Any, 3) (0,2) (0,3) (0,3) (3,3)
+  // Allocated node index      0    1    2    3  Total
+  // Requested node index 0    1    1    1    2    5
+  //                      1    1    0    0    0    1
+  //                      2    1    0    0    0    1
+  //                      3    0    0    0    1    1
+  //                    Any    0    0    0    1    1
+  class NodeDataArray : public CHeapObj<mtGC> {
+    // The number of nodes.
+    uint _num_column;
+    // The number of nodes + 1 (for any node request)
+    uint _num_row;
+    // 2-dimension array that holds count of allocated / requested node index.
+    size_t** _data;
+
+  public:
+    NodeDataArray(uint num_nodes);
+    ~NodeDataArray();
+
+    // Create Stat result of hit count, requested count and hit rate.
+    // The result is copied to the given result parameter.
+    void create_hit_rate(Stat* result) const;
+    // Create Stat result of hit count, requested count and hit rate of the given index.
+    // The result is copied to the given result parameter.
+    void create_hit_rate(Stat* result, uint req_index) const;
+    // Return sum of the given index.
+    size_t sum(uint req_index) const;
+    // Increase at the request / allocated index.
+    void increase(uint req_index, uint alloc_index);
+    // Clear all data.
+    void clear();
+    // Return current value of the given request / allocated index.
+    size_t get(uint req_index, uint alloc_index);
+    // Copy values of the given request index.
+    void copy(uint req_index, size_t* stat);
+  };
+
+public:
+  enum NodeDataItems {
+    // Statistics of a new region allocation.
+    NewRegionAlloc,
+    // Statistics of object processing during copy to survivor region.
+    LocalObjProcessAtCopyToSurv,
+    NodeDataItemsSentinel
+  };
+
+private:
+  const int* _node_ids;
+  uint _num_node_ids;
+
+  NodeDataArray* _node_data[NodeDataItemsSentinel];
+
+  void print_info(G1NUMAStats::NodeDataItems phase);
+
+  void print_mutator_alloc_stat_debug();
+
+public:
+  G1NUMAStats(const int* node_ids, uint num_node_ids);
+  ~G1NUMAStats();
+
+  void clear(G1NUMAStats::NodeDataItems phase);
+
+  // Update the given phase of requested and allocated node index.
+  void update(G1NUMAStats::NodeDataItems phase, uint requested_node_index, uint allocated_node_index);
+
+  // Copy all allocated statistics of the given phase and requested node.
+  // Precondition: allocated_stat should have same length of active nodes.
+  void copy(G1NUMAStats::NodeDataItems phase, uint requested_node_index, size_t* allocated_stat);
+
+  void print_statistics();
+};
+
+#endif // SHARE_VM_GC_G1_NODE_TIMES_HPP