1 /*
   2  * Copyright (c) 2017, 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 #ifndef OS_LINUX_OSCONTAINER_LINUX_HPP
  26 #define OS_LINUX_OSCONTAINER_LINUX_HPP
  27 
  28 #include "utilities/globalDefinitions.hpp"
  29 #include "utilities/macros.hpp"
  30 #include "memory/allocation.hpp"
  31 
  32 #define OSCONTAINER_ERROR (-2)
  33 #define OSCONTAINER_CACHE_TIMEOUT (NANOSECS_PER_SEC/50)
  34 
  35 class OSContainer: AllStatic {
  36 
  37  private:
  38   static bool   _is_initialized;
  39   static bool   _is_containerized;
  40   static int    _active_processor_count;
  41 
  42   static jlong read_memory_limit_in_bytes();
  43 
  44  public:
  45   static void init();
  46   static inline bool is_containerized();
  47   static const char * container_type();
  48 
  49   static jlong uses_mem_hierarchy();
  50   static jlong memory_limit_in_bytes();
  51   static jlong memory_and_swap_limit_in_bytes();
  52   static jlong memory_soft_limit_in_bytes();
  53   static jlong memory_usage_in_bytes();
  54   static jlong memory_max_usage_in_bytes();
  55 
  56   static int active_processor_count();
  57 
  58   static char * cpu_cpuset_cpus();
  59   static char * cpu_cpuset_memory_nodes();
  60 
  61   static int cpu_quota();
  62   static int cpu_period();
  63 
  64   static int cpu_shares();
  65 
  66 };
  67 
  68 inline bool OSContainer::is_containerized() {
  69   return _is_containerized;
  70 }
  71 
  72 #endif // OS_LINUX_OSCONTAINER_LINUX_HPP
--- EOF ---