1 /*
   2  * Copyright (c) 2016, 2017, 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 #include "gc/z/zNUMA.hpp"
  25 #include "logging/log.hpp"
  26 #include "runtime/os.hpp"
  27 
  28 bool ZNUMA::_enabled;
  29 
  30 void ZNUMA::initialize() {
  31   initialize_platform();
  32 
  33   log_info(gc, init)("NUMA Support: %s", to_string());
  34   if (is_enabled()) {
  35     log_info(gc, init)("NUMA Nodes: %u", count());
  36   }
  37 }
  38 
  39 bool ZNUMA::is_enabled() {
  40   return _enabled;
  41 }
  42 
  43 void ZNUMA::memory_interleave(uintptr_t addr, size_t size) {
  44   if (!_enabled) {
  45     // NUMA support not enabled
  46     return;
  47   }
  48 
  49   os::numa_make_global((char*)addr, size);
  50 }
  51 
  52 const char* ZNUMA::to_string() {
  53   return _enabled ? "Enabled" : "Disabled";
  54 }