--- /dev/null	2019-09-04 10:58:08.784555846 -0700
+++ new/src/hotspot/share/gc/g1/g1MemoryNodeManager.hpp	2019-09-21 06:25:33.421961305 -0700
@@ -0,0 +1,71 @@
+/*
+ * 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_MEMORY_NODE_MANAGER_HPP
+#define SHARE_VM_GC_G1_MEMORY_NODE_MANAGER_HPP
+
+#include "memory/allocation.hpp"
+#include "runtime/os.hpp"
+
+// Helper class to manage memory nodes.
+// G1MemoryMultiNodeManager will be created if UseNUMA is enabled and active
+// NUMA nodes are more than one. Otherwise, G1MemoryNodeManager will be created.
+class G1MemoryNodeManager : public CHeapObj<mtGC> {
+  static G1MemoryNodeManager* _inst;
+
+public:
+  static const uint InvalidNodeIndex = (uint)os::InvalidId;
+  static const uint AnyNodeIndex = (uint)os::AnyId;
+
+  static G1MemoryNodeManager* mgr() { return _inst; }
+
+  static G1MemoryNodeManager* create();
+
+  virtual ~G1MemoryNodeManager() { }
+
+  // Set page size of Java Heap.
+  virtual void set_page_size(size_t page_size) { }
+
+  // Print current active memory node count.
+  virtual uint num_active_nodes() const { return 1; }
+
+  // Returns memory node ids
+  virtual const int* node_ids() const { static int dummy_id = 0; return &dummy_id; }
+
+  virtual uint index_of_current_thread() const { return 0; }
+
+  // If the given node index is valid return same index,
+  // If it is not valid, generate valid random index.
+  virtual uint valid_node_index(uint node_index) const { return 0; }
+
+  virtual bool is_valid_node_index(uint node_index) const {
+    // Single node index should be always 0.
+    return node_index == 0;
+  }
+
+  // Retrieve node index of the given address.
+  virtual uint index_of_address(HeapWord* addr) const { return 0; }
+};
+
+#endif // SHARE_VM_GC_G1_MEMORY_NODE_MANAGER_HPP