1 /* 2 * Copyright (c) 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 CGROUP_V1_SUBSYSTEM_LINUX_HPP 26 #define CGROUP_V1_SUBSYSTEM_LINUX_HPP 27 28 #include "runtime/os.hpp" 29 #include "memory/allocation.hpp" 30 #include "cgroupSubsystem_linux.hpp" 31 32 // Cgroups version 1 specific implementation 33 34 class CgroupV1Controller: public CgroupController { 35 private: 36 /* mountinfo contents */ 37 char *_root; 38 char *_mount_point; 39 40 /* Constructed subsystem directory */ 41 char *_path; 42 43 public: 44 CgroupV1Controller(char *root, char *mountpoint) { 45 _root = os::strdup(root); 46 _mount_point = os::strdup(mountpoint); 47 _path = NULL; 48 } 49 50 virtual void set_subsystem_path(char *cgroup_path); 51 char *subsystem_path() { return _path; } 52 }; 53 54 class CgroupV1MemoryController: public CgroupV1Controller { 55 56 public: 57 bool is_hierarchical() { return _uses_mem_hierarchy; } 58 void set_subsystem_path(char *cgroup_path); 59 private: 60 /* Some container runtimes set limits via cgroup 61 * hierarchy. If set to true consider also memory.stat 62 * file if everything else seems unlimited */ 63 bool _uses_mem_hierarchy; 64 jlong uses_mem_hierarchy(); 65 void set_hierarchical(bool value) { _uses_mem_hierarchy = value; } 66 67 public: 68 CgroupV1MemoryController(char *root, char *mountpoint) : CgroupV1Controller(root, mountpoint) { 69 _uses_mem_hierarchy = false; 70 } 71 72 }; 73 74 class CgroupV1Subsystem: public CgroupSubsystem { 75 76 public: 77 jlong read_memory_limit_in_bytes(); 78 jlong memory_and_swap_limit_in_bytes(); 79 jlong memory_soft_limit_in_bytes(); 80 jlong memory_usage_in_bytes(); 81 jlong memory_max_usage_in_bytes(); 82 char * cpu_cpuset_cpus(); 83 char * cpu_cpuset_memory_nodes(); 84 85 int cpu_quota(); 86 int cpu_period(); 87 88 int cpu_shares(); 89 90 const char * container_type() { 91 return "cgroupv1"; 92 } 93 CachingCgroupController * memory_controller() { return _memory; } 94 CachingCgroupController * cpu_controller() { return _cpu; } 95 96 private: 97 julong _unlimited_memory; 98 99 /* controllers */ 100 CachingCgroupController* _memory = NULL; 101 CgroupV1Controller* _cpuset = NULL; 102 CachingCgroupController* _cpu = NULL; 103 CgroupV1Controller* _cpuacct = NULL; 104 105 public: 106 CgroupV1Subsystem(CgroupV1Controller* cpuset, 107 CgroupV1Controller* cpu, 108 CgroupV1Controller* cpuacct, 109 CgroupV1MemoryController* memory) { 110 _cpuset = cpuset; 111 _cpu = new CachingCgroupController(cpu); 112 _cpuacct = cpuacct; 113 _memory = new CachingCgroupController(memory); 114 _unlimited_memory = (LONG_MAX / os::vm_page_size()) * os::vm_page_size(); 115 } 116 }; 117 118 #endif // CGROUP_V1_SUBSYSTEM_LINUX_HPP