1 /*
2 * Copyright (c) 2017, 2020, 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
34 // 20ms timeout between re-reads of memory limit and _active_processor_count.
35 #define OSCONTAINER_CACHE_TIMEOUT (NANOSECS_PER_SEC/50)
36
37 class OSContainer: AllStatic {
38
39 private:
40 static bool _is_initialized;
41 static bool _is_containerized;
42 static int _active_processor_count;
43
44 static jlong read_memory_limit_in_bytes();
45
46 public:
47 static void init();
48 static inline bool is_containerized();
49 static const char * container_type();
50
51 static jlong memory_limit_in_bytes();
52 static jlong memory_and_swap_limit_in_bytes();
53 static jlong memory_soft_limit_in_bytes();
54 static jlong memory_usage_in_bytes();
55 static jlong memory_max_usage_in_bytes();
56
57 static int active_processor_count();
58
59 static char * cpu_cpuset_cpus();
60 static char * cpu_cpuset_memory_nodes();
61
62 static int cpu_quota();
63 static int cpu_period();
64
65 static int cpu_shares();
66
67 };
68
is_containerized()69 inline bool OSContainer::is_containerized() {
70 return _is_containerized;
71 }
72
73 #endif // OS_LINUX_OSCONTAINER_LINUX_HPP
74