* Copyright (c) 2019, 2022, 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.
*
*/
#include <string.h>
#include <math.h>
#include <errno.h>
#include "cgroupV1Subsystem_linux.hpp"
#include "memory/allocation.hpp"
#include "runtime/globals.hpp"
#include "runtime/os.hpp"
#include "utilities/globalDefinitions.hpp"
#include "os_linux.hpp"
* Set directory to subsystem specific files based
* on the contents of the mountinfo and cgroup files.
*/
void CgroupV1Controller::set_subsystem_path(char *cgroup_path) {
char buf[MAXPATHLEN+1];
if (_root != NULL && cgroup_path != NULL) {
if (strcmp(_root, "/") == 0) {
int buflen;
strncpy(buf, _mount_point, MAXPATHLEN);
buf[MAXPATHLEN-1] = '\0';
if (strcmp(cgroup_path,"/") != 0) {
buflen = strlen(buf);
if ((buflen + strlen(cgroup_path)) > (MAXPATHLEN-1)) {
return;
}
strncat(buf, cgroup_path, MAXPATHLEN-buflen);
buf[MAXPATHLEN-1] = '\0';
}
_path = os::strdup(buf);
} else {
if (strcmp(_root, cgroup_path) == 0) {
strncpy(buf, _mount_point, MAXPATHLEN);
buf[MAXPATHLEN-1] = '\0';
_path = os::strdup(buf);
} else {
char *p = strstr(cgroup_path, _root);
if (p != NULL && p == _root) {
if (strlen(cgroup_path) > strlen(_root)) {
int buflen;
strncpy(buf, _mount_point, MAXPATHLEN);
buf[MAXPATHLEN-1] = '\0';
buflen = strlen(buf);
if ((buflen + strlen(cgroup_path) - strlen(_root)) > (MAXPATHLEN-1)) {
return;
}
strncat(buf, cgroup_path + strlen(_root), MAXPATHLEN-buflen);
buf[MAXPATHLEN-1] = '\0';
_path = os::strdup(buf);
}
}
}
}
}
}
*
* Return whether or not hierarchical cgroup accounting is being
* done.
*
* return:
* A number > 0 if true, or
* OSCONTAINER_ERROR for not supported
*/
jlong CgroupV1MemoryController::uses_mem_hierarchy() {
GET_CONTAINER_INFO(jlong, this, "/memory.use_hierarchy",
"Use Hierarchy is: " JLONG_FORMAT, JLONG_FORMAT, use_hierarchy);
return use_hierarchy;
}
void CgroupV1MemoryController::set_subsystem_path(char *cgroup_path) {
CgroupV1Controller::set_subsystem_path(cgroup_path);
jlong hierarchy = uses_mem_hierarchy();
if (hierarchy > 0) {
set_hierarchical(true);
}
}
jlong CgroupV1Subsystem::read_memory_limit_in_bytes() {
GET_CONTAINER_INFO(julong, _memory->controller(), "/memory.limit_in_bytes",
"Memory Limit is: " JULONG_FORMAT, JULONG_FORMAT, memlimit);
if (memlimit >= os::Linux::physical_memory()) {
if (PrintContainerInfo) {
tty->print_cr("Non-Hierarchical Memory Limit is: Unlimited");
}
CgroupV1MemoryController* mem_controller = reinterpret_cast<CgroupV1MemoryController*>(_memory->controller());
if (mem_controller->is_hierarchical()) {
const char* matchline = "hierarchical_memory_limit";
const char* format = "%s " JULONG_FORMAT;
GET_CONTAINER_INFO_LINE(julong, _memory->controller(), "/memory.stat", matchline,
"Hierarchical Memory Limit is: " JULONG_FORMAT, format, hier_memlimit)
if (hier_memlimit >= os::Linux::physical_memory()) {
if (PrintContainerInfo) {
tty->print_cr("Hierarchical Memory Limit is: Unlimited");
}
} else {
return (jlong)hier_memlimit;
}
}
return (jlong)-1;
}
else {
return (jlong)memlimit;
}
}
jlong CgroupV1Subsystem::memory_and_swap_limit_in_bytes() {
julong host_total_memsw;
GET_CONTAINER_INFO(julong, _memory->controller(), "/memory.memsw.limit_in_bytes",
"Memory and Swap Limit is: " JULONG_FORMAT, JULONG_FORMAT, memswlimit);
host_total_memsw = os::Linux::host_swap() + os::Linux::physical_memory();
if (memswlimit >= host_total_memsw) {
if (PrintContainerInfo) {
tty->print_cr("Non-Hierarchical Memory and Swap Limit is: Unlimited");
}
CgroupV1MemoryController* mem_controller = reinterpret_cast<CgroupV1MemoryController*>(_memory->controller());
if (mem_controller->is_hierarchical()) {
const char* matchline = "hierarchical_memsw_limit";
const char* format = "%s " JULONG_FORMAT;
GET_CONTAINER_INFO_LINE(julong, _memory->controller(), "/memory.stat", matchline,
"Hierarchical Memory and Swap Limit is : " JULONG_FORMAT, format, hier_memlimit)
if (hier_memlimit >= host_total_memsw) {
if (PrintContainerInfo) {
tty->print_cr("Hierarchical Memory and Swap Limit is: Unlimited");
}
} else {
return (jlong)hier_memlimit;
}
}
return (jlong)-1;
} else {
return (jlong)memswlimit;
}
}
jlong CgroupV1Subsystem::memory_soft_limit_in_bytes() {
GET_CONTAINER_INFO(julong, _memory->controller(), "/memory.soft_limit_in_bytes",
"Memory Soft Limit is: " JULONG_FORMAT, JULONG_FORMAT, memsoftlimit);
if (memsoftlimit >= os::Linux::physical_memory()) {
if (PrintContainerInfo) {
tty->print_cr("Memory Soft Limit is: Unlimited");
}
return (jlong)-1;
} else {
return (jlong)memsoftlimit;
}
}
*
* Return the amount of used memory for this process.
*
* return:
* memory usage in bytes or
* -1 for unlimited
* OSCONTAINER_ERROR for not supported
*/
jlong CgroupV1Subsystem::memory_usage_in_bytes() {
GET_CONTAINER_INFO(jlong, _memory->controller(), "/memory.usage_in_bytes",
"Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, memusage);
return memusage;
}
*
* Return the maximum amount of used memory for this process.
*
* return:
* max memory usage in bytes or
* OSCONTAINER_ERROR for not supported
*/
jlong CgroupV1Subsystem::memory_max_usage_in_bytes() {
GET_CONTAINER_INFO(jlong, _memory->controller(), "/memory.max_usage_in_bytes",
"Maximum Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, memmaxusage);
return memmaxusage;
}
jlong CgroupV1Subsystem::kernel_memory_usage_in_bytes() {
GET_CONTAINER_INFO(jlong, _memory->controller(), "/memory.kmem.usage_in_bytes",
"Kernel Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, kmem_usage);
return kmem_usage;
}
jlong CgroupV1Subsystem::kernel_memory_limit_in_bytes() {
GET_CONTAINER_INFO(julong, _memory->controller(), "/memory.kmem.limit_in_bytes",
"Kernel Memory Limit is: " JULONG_FORMAT, JULONG_FORMAT, kmem_limit);
if (kmem_limit >= os::Linux::physical_memory()) {
return (jlong)-1;
}
return (jlong)kmem_limit;
}
jlong CgroupV1Subsystem::kernel_memory_max_usage_in_bytes() {
GET_CONTAINER_INFO(jlong, _memory->controller(), "/memory.kmem.max_usage_in_bytes",
"Maximum Kernel Memory Usage is: " JLONG_FORMAT, JLONG_FORMAT, kmem_max_usage);
return kmem_max_usage;
}
void CgroupV1Subsystem::print_version_specific_info(outputStream* st) {
jlong kmem_usage = kernel_memory_usage_in_bytes();
jlong kmem_limit = kernel_memory_limit_in_bytes();
jlong kmem_max_usage = kernel_memory_max_usage_in_bytes();
OSContainer::print_container_helper(st, kmem_usage, "kernel_memory_usage_in_bytes");
OSContainer::print_container_helper(st, kmem_limit, "kernel_memory_max_usage_in_bytes");
OSContainer::print_container_helper(st, kmem_max_usage, "kernel_memory_limit_in_bytes");
}
char * CgroupV1Subsystem::cpu_cpuset_cpus() {
GET_CONTAINER_INFO_CPTR(cptr, _cpuset, "/cpuset.cpus",
"cpuset.cpus is: %s", "%1023s", cpus, 1024);
return os::strdup(cpus);
}
char * CgroupV1Subsystem::cpu_cpuset_memory_nodes() {
GET_CONTAINER_INFO_CPTR(cptr, _cpuset, "/cpuset.mems",
"cpuset.mems is: %s", "%1023s", mems, 1024);
return os::strdup(mems);
}
*
* Return the number of microseconds per period
* process is guaranteed to run.
*
* return:
* quota time in microseconds
* -1 for no quota
* OSCONTAINER_ERROR for not supported
*/
int CgroupV1Subsystem::cpu_quota() {
GET_CONTAINER_INFO(int, _cpu->controller(), "/cpu.cfs_quota_us",
"CPU Quota is: %d", "%d", quota);
return quota;
}
int CgroupV1Subsystem::cpu_period() {
GET_CONTAINER_INFO(int, _cpu->controller(), "/cpu.cfs_period_us",
"CPU Period is: %d", "%d", period);
return period;
}
*
* Return the amount of cpu shares available to the process
*
* return:
* Share number (typically a number relative to 1024)
* (2048 typically expresses 2 CPUs worth of processing)
* -1 for no share setup
* OSCONTAINER_ERROR for not supported
*/
int CgroupV1Subsystem::cpu_shares() {
GET_CONTAINER_INFO(int, _cpu->controller(), "/cpu.shares",
"CPU Shares is: %d", "%d", shares);
if (shares == 1024) return -1;
return shares;
}
