/* * Copyright (c) 2019, 2025, 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 CGROUP_V1_SUBSYSTEM_LINUX_HPP #define CGROUP_V1_SUBSYSTEM_LINUX_HPP #include "cgroupSubsystem_linux.hpp" #include "cgroupUtil_linux.hpp" #include "memory/allocation.hpp" #include "runtime/os.hpp" // Cgroups version 1 specific implementation class CgroupV1Controller: public CgroupController { private: /* mountinfo contents */ char* _root; bool _read_only; /* Constructed subsystem directory */ char* _path; public: CgroupV1Controller(char *root, char *mountpoint, bool ro) : _root(os::strdup(root)), _read_only(ro), _path(nullptr) { _cgroup_path = nullptr; _mount_point = os::strdup(mountpoint); } // Shallow copy constructor CgroupV1Controller(const CgroupV1Controller& o) : _root(o._root), _read_only(o._read_only), _path(o._path) { _cgroup_path = o._cgroup_path; _mount_point = o._mount_point; } ~CgroupV1Controller() { // At least one subsystem controller exists with paths to malloc'd path // names } void set_subsystem_path(const char *cgroup_path); const char* subsystem_path() override { return _path; } bool is_read_only() override { return _read_only; } bool needs_hierarchy_adjustment() override; }; class CgroupV1MemoryController final : public CgroupMemoryController { private: CgroupV1Controller _reader; CgroupV1Controller* reader() { return &_reader; } bool read_memory_limit_val(physical_memory_size_type& result); bool read_hierarchical_memory_limit_val(physical_memory_size_type& result); bool read_hierarchical_mem_swap_val(physical_memory_size_type& result); bool read_use_hierarchy_val(physical_memory_size_type& result); bool memory_usage_val(physical_memory_size_type& result); bool read_mem_swappiness(physical_memory_size_type& result); bool read_mem_swap(physical_memory_size_type& result); bool memory_soft_limit_val(physical_memory_size_type& result); bool memory_max_usage_val(physical_memory_size_type& result); bool kernel_memory_usage_val(physical_memory_size_type& result); bool kernel_memory_limit_val(physical_memory_size_type& result); bool kernel_memory_max_usage_val(physical_memory_size_type& result); bool uses_mem_hierarchy(); public: void set_subsystem_path(const char *cgroup_path) override { reader()->set_subsystem_path(cgroup_path); } bool read_memory_limit_in_bytes(physical_memory_size_type upper_bound, physical_memory_size_type& value) override; bool memory_usage_in_bytes(physical_memory_size_type& result) override; bool memory_and_swap_limit_in_bytes(physical_memory_size_type upper_mem_bound, physical_memory_size_type upper_swap_bound, physical_memory_size_type& result) override; bool memory_and_swap_usage_in_bytes(physical_memory_size_type upper_mem_bound, physical_memory_size_type upper_swap_bound, physical_memory_size_type& result) override; bool memory_soft_limit_in_bytes(physical_memory_size_type upper_bound, physical_memory_size_type& result) override; bool memory_throttle_limit_in_bytes(physical_memory_size_type& result) override; bool memory_max_usage_in_bytes(physical_memory_size_type& result) override; bool rss_usage_in_bytes(physical_memory_size_type& result) override; bool cache_usage_in_bytes(physical_memory_size_type& result) override; bool kernel_memory_usage_in_bytes(physical_memory_size_type& result); bool kernel_memory_limit_in_bytes(physical_memory_size_type upper_bound, physical_memory_size_type& result); bool kernel_memory_max_usage_in_bytes(physical_memory_size_type& result); void print_version_specific_info(outputStream* st, physical_memory_size_type upper_mem_bound) override; bool needs_hierarchy_adjustment() override { return reader()->needs_hierarchy_adjustment(); } bool is_read_only() override { return reader()->is_read_only(); } const char* subsystem_path() override { return reader()->subsystem_path(); } const char* mount_point() override { return reader()->mount_point(); } const char* cgroup_path() override { return reader()->cgroup_path(); } public: CgroupV1MemoryController(const CgroupV1Controller& reader) : _reader(reader) { } }; class CgroupV1CpuController final : public CgroupCpuController { private: CgroupV1Controller _reader; CgroupV1Controller* reader() { return &_reader; } bool cpu_period_val(uint64_t& result); bool cpu_shares_val(uint64_t& result); public: bool cpu_quota(int& result) override; bool cpu_period(int& result) override; bool cpu_shares(int& result) override; void set_subsystem_path(const char *cgroup_path) override { reader()->set_subsystem_path(cgroup_path); } bool is_read_only() override { return reader()->is_read_only(); } const char* subsystem_path() override { return reader()->subsystem_path(); } const char* mount_point() override { return reader()->mount_point(); } bool needs_hierarchy_adjustment() override { return reader()->needs_hierarchy_adjustment(); } const char* cgroup_path() override { return reader()->cgroup_path(); } public: CgroupV1CpuController(const CgroupV1Controller& reader) : _reader(reader) { } }; class CgroupV1CpuacctController final : public CgroupCpuacctController { private: CgroupV1Controller _reader; CgroupV1Controller* reader() { return &_reader; } bool cpu_usage_in_micros_val(uint64_t& result); public: bool cpu_usage_in_micros(uint64_t& result) override; void set_subsystem_path(const char *cgroup_path) override { reader()->set_subsystem_path(cgroup_path); } bool is_read_only() override { return reader()->is_read_only(); } const char* subsystem_path() override { return reader()->subsystem_path(); } const char* mount_point() override { return reader()->mount_point(); } bool needs_hierarchy_adjustment() override { return reader()->needs_hierarchy_adjustment(); } const char* cgroup_path() override { return reader()->cgroup_path(); } public: CgroupV1CpuacctController(const CgroupV1Controller& reader) : _reader(reader) { } }; class CgroupV1Subsystem: public CgroupSubsystem { public: CgroupV1Subsystem(CgroupV1Controller* cpuset, CgroupV1CpuController* cpu, CgroupV1CpuacctController* cpuacct, CgroupV1Controller* pids, CgroupV1MemoryController* memory); bool kernel_memory_usage_in_bytes(physical_memory_size_type& result); bool kernel_memory_limit_in_bytes(physical_memory_size_type& result); bool kernel_memory_max_usage_in_bytes(physical_memory_size_type& result); char * cpu_cpuset_cpus() override; char * cpu_cpuset_memory_nodes() override; bool pids_max(uint64_t& result) override; bool pids_current(uint64_t& result) override; bool is_containerized() override; const char * container_type() override { return "cgroupv1"; } CachingCgroupController* memory_controller() override { return _memory; } CachingCgroupController* cpu_controller() override { return _cpu; } CgroupCpuacctController* cpuacct_controller() override { return _cpuacct; } private: /* controllers */ CachingCgroupController* _memory = nullptr; CgroupV1Controller* _cpuset = nullptr; CachingCgroupController* _cpu = nullptr; CgroupV1CpuacctController* _cpuacct = nullptr; CgroupV1Controller* _pids = nullptr; }; #endif // CGROUP_V1_SUBSYSTEM_LINUX_HPP