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/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jvm.h"
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#include "memory/allocation.inline.hpp"
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#include "os_linux.inline.hpp"
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#include "runtime/os.hpp"
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#include "runtime/os_perf.hpp"
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#ifdef X86
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#include "vm_version_ext_x86.hpp"
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#endif
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#ifdef ARM
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#include "vm_version_ext_arm.hpp"
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#endif
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#ifndef ARM
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#ifdef AARCH64
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#include "vm_version_ext_aarch64.hpp"
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#endif
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <pthread.h>
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#include <limits.h>
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/**
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/proc/[number]/stat
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Status information about the process. This is used by ps(1). It is defined in /usr/src/linux/fs/proc/array.c.
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The fields, in order, with their proper scanf(3) format specifiers, are:
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1. pid %d The process id.
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2. comm %s
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The filename of the executable, in parentheses. This is visible whether or not the executable is swapped out.
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3. state %c
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One character from the string "RSDZTW" where R is running, S is sleeping in an interruptible wait, D is waiting in uninterruptible disk
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sleep, Z is zombie, T is traced or stopped (on a signal), and W is paging.
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4. ppid %d
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The PID of the parent.
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5. pgrp %d
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The process group ID of the process.
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6. session %d
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The session ID of the process.
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7. tty_nr %d
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The tty the process uses.
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8. tpgid %d
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The process group ID of the process which currently owns the tty that the process is connected to.
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9. flags %lu
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The flags of the process. The math bit is decimal 4, and the traced bit is decimal 10.
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10. minflt %lu
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The number of minor faults the process has made which have not required loading a memory page from disk.
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11. cminflt %lu
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The number of minor faults that the process's waited-for children have made.
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12. majflt %lu
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The number of major faults the process has made which have required loading a memory page from disk.
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13. cmajflt %lu
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The number of major faults that the process's waited-for children have made.
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14. utime %lu
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The number of jiffies that this process has been scheduled in user mode.
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15. stime %lu
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The number of jiffies that this process has been scheduled in kernel mode.
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16. cutime %ld
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The number of jiffies that this process's waited-for children have been scheduled in user mode. (See also times(2).)
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17. cstime %ld
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The number of jiffies that this process' waited-for children have been scheduled in kernel mode.
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18. priority %ld
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The standard nice value, plus fifteen. The value is never negative in the kernel.
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19. nice %ld
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The nice value ranges from 19 (nicest) to -19 (not nice to others).
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20. 0 %ld This value is hard coded to 0 as a placeholder for a removed field.
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21. itrealvalue %ld
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The time in jiffies before the next SIGALRM is sent to the process due to an interval timer.
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22. starttime %lu
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The time in jiffies the process started after system boot.
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23. vsize %lu
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Virtual memory size in bytes.
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24. rss %ld
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Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes. This is just the pages which count
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towards text, data, or stack space. This does not include pages which have not been demand-loaded in, or which are swapped out.
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25. rlim %lu
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Current limit in bytes on the rss of the process (usually 4294967295 on i386).
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26. startcode %lu
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The address above which program text can run.
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27. endcode %lu
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The address below which program text can run.
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28. startstack %lu
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The address of the start of the stack.
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29. kstkesp %lu
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The current value of esp (stack pointer), as found in the kernel stack page for the process.
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30. kstkeip %lu
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The current EIP (instruction pointer).
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31. signal %lu
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The bitmap of pending signals (usually 0).
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32. blocked %lu
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The bitmap of blocked signals (usually 0, 2 for shells).
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33. sigignore %lu
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The bitmap of ignored signals.
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34. sigcatch %lu
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The bitmap of catched signals.
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35. wchan %lu
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This is the "channel" in which the process is waiting. It is the address of a system call, and can be looked up in a namelist if you need
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a textual name. (If you have an up-to-date /etc/psdatabase, then try ps -l to see the WCHAN field in action.)
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36. nswap %lu
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Number of pages swapped - not maintained.
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37. cnswap %lu
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Cumulative nswap for child processes.
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38. exit_signal %d
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Signal to be sent to parent when we die.
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39. processor %d
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CPU number last executed on.
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///// SSCANF FORMAT STRING. Copy and use.
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field: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
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format: %d %s %c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %d %d
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*/
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/**
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* For platforms that have them, when declaring
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* a printf-style function,
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* formatSpec is the parameter number (starting at 1)
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* that is the format argument ("%d pid %s")
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* params is the parameter number where the actual args to
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* the format starts. If the args are in a va_list, this
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* should be 0.
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*/
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#ifndef PRINTF_ARGS
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# define PRINTF_ARGS(formatSpec, params) ATTRIBUTE_PRINTF(formatSpec, params)
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#endif
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#ifndef SCANF_ARGS
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# define SCANF_ARGS(formatSpec, params) ATTRIBUTE_SCANF(formatSpec, params)
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#endif
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#ifndef _PRINTFMT_
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# define _PRINTFMT_
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#endif
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#ifndef _SCANFMT_
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# define _SCANFMT_
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#endif
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struct CPUPerfTicks {
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uint64_t used;
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uint64_t usedKernel;
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uint64_t total;
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};
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typedef enum {
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CPU_LOAD_VM_ONLY,
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CPU_LOAD_GLOBAL,
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} CpuLoadTarget;
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enum {
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UNDETECTED,
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UNDETECTABLE,
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LINUX26_NPTL,
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BAREMETAL
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};
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struct CPUPerfCounters {
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int nProcs;
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CPUPerfTicks jvmTicks;
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CPUPerfTicks* cpus;
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};
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static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target);
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/** reads /proc/<pid>/stat data, with some checks and some skips.
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* Ensure that 'fmt' does _NOT_ contain the first two "%d %s"
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*/
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static int SCANF_ARGS(2, 0) vread_statdata(const char* procfile, _SCANFMT_ const char* fmt, va_list args) {
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FILE*f;
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int n;
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char buf[2048];
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if ((f = fopen(procfile, "r")) == NULL) {
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return -1;
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}
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if ((n = fread(buf, 1, sizeof(buf), f)) != -1) {
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char *tmp;
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buf[n-1] = '\0';
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/** skip through pid and exec name. */
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if ((tmp = strrchr(buf, ')')) != NULL) {
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// skip the ')' and the following space
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// but check that buffer is long enough
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tmp += 2;
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if (tmp < buf + n) {
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n = vsscanf(tmp, fmt, args);
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}
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}
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}
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fclose(f);
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return n;
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}
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static int SCANF_ARGS(2, 3) read_statdata(const char* procfile, _SCANFMT_ const char* fmt, ...) {
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int n;
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va_list args;
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va_start(args, fmt);
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n = vread_statdata(procfile, fmt, args);
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va_end(args);
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return n;
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}
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static FILE* open_statfile(void) {
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FILE *f;
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if ((f = fopen("/proc/stat", "r")) == NULL) {
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static int haveWarned = 0;
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if (!haveWarned) {
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haveWarned = 1;
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}
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}
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return f;
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}
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static void
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next_line(FILE *f) {
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int c;
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do {
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c = fgetc(f);
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} while (c != '\n' && c != EOF);
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}
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/**
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* Return the total number of ticks since the system was booted.
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* If the usedTicks parameter is not NULL, it will be filled with
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* the number of ticks spent on actual processes (user, system or
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* nice processes) since system boot. Note that this is the total number
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* of "executed" ticks on _all_ CPU:s, that is on a n-way system it is
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* n times the number of ticks that has passed in clock time.
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*
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* Returns a negative value if the reading of the ticks failed.
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*/
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static OSReturn get_total_ticks(int which_logical_cpu, CPUPerfTicks* pticks) {
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FILE* fh;
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uint64_t userTicks, niceTicks, systemTicks, idleTicks;
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uint64_t iowTicks = 0, irqTicks = 0, sirqTicks= 0;
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int logical_cpu = -1;
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const int expected_assign_count = (-1 == which_logical_cpu) ? 4 : 5;
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int n;
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if ((fh = open_statfile()) == NULL) {
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return OS_ERR;
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}
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if (-1 == which_logical_cpu) {
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n = fscanf(fh, "cpu " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
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UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
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&userTicks, &niceTicks, &systemTicks, &idleTicks,
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&iowTicks, &irqTicks, &sirqTicks);
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} else {
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// Move to next line
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next_line(fh);
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// find the line for requested cpu faster to just iterate linefeeds?
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for (int i = 0; i < which_logical_cpu; i++) {
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next_line(fh);
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}
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n = fscanf(fh, "cpu%u " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
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UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
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&logical_cpu, &userTicks, &niceTicks,
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&systemTicks, &idleTicks, &iowTicks, &irqTicks, &sirqTicks);
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}
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fclose(fh);
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if (n < expected_assign_count || logical_cpu != which_logical_cpu) {
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#ifdef DEBUG_LINUX_PROC_STAT
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vm_fprintf(stderr, "[stat] read failed");
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#endif
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return OS_ERR;
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}
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#ifdef DEBUG_LINUX_PROC_STAT
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vm_fprintf(stderr, "[stat] read "
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UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
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UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " \n",
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userTicks, niceTicks, systemTicks, idleTicks,
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iowTicks, irqTicks, sirqTicks);
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#endif
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pticks->used = userTicks + niceTicks;
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pticks->usedKernel = systemTicks + irqTicks + sirqTicks;
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pticks->total = userTicks + niceTicks + systemTicks + idleTicks +
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iowTicks + irqTicks + sirqTicks;
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return OS_OK;
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}
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static int get_systemtype(void) {
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static int procEntriesType = UNDETECTED;
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DIR *taskDir;
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if (procEntriesType != UNDETECTED) {
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return procEntriesType;
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}
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// Check whether we have a task subdirectory
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if ((taskDir = opendir("/proc/self/task")) == NULL) {
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procEntriesType = UNDETECTABLE;
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} else {
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// The task subdirectory exists; we're on a Linux >= 2.6 system
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closedir(taskDir);
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procEntriesType = LINUX26_NPTL;
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}
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return procEntriesType;
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}
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/** read user and system ticks from a named procfile, assumed to be in 'stat' format then. */
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static int read_ticks(const char* procfile, uint64_t* userTicks, uint64_t* systemTicks) {
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return read_statdata(procfile, "%*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u " UINT64_FORMAT " " UINT64_FORMAT,
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userTicks, systemTicks);
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}
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/**
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* Return the number of ticks spent in any of the processes belonging
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* to the JVM on any CPU.
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*/
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static OSReturn get_jvm_ticks(CPUPerfTicks* pticks) {
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uint64_t userTicks;
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uint64_t systemTicks;
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if (get_systemtype() != LINUX26_NPTL) {
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return OS_ERR;
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}
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if (read_ticks("/proc/self/stat", &userTicks, &systemTicks) != 2) {
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return OS_ERR;
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}
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413 |
|
|
414 |
// get the total
|
|
415 |
if (get_total_ticks(-1, pticks) != OS_OK) {
|
|
416 |
return OS_ERR;
|
|
417 |
}
|
|
418 |
|
|
419 |
pticks->used = userTicks;
|
|
420 |
pticks->usedKernel = systemTicks;
|
|
421 |
|
|
422 |
return OS_OK;
|
|
423 |
}
|
|
424 |
|
|
425 |
/**
|
|
426 |
* Return the load of the CPU as a double. 1.0 means the CPU process uses all
|
|
427 |
* available time for user or system processes, 0.0 means the CPU uses all time
|
|
428 |
* being idle.
|
|
429 |
*
|
|
430 |
* Returns a negative value if there is a problem in determining the CPU load.
|
|
431 |
*/
|
|
432 |
static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target) {
|
|
433 |
uint64_t udiff, kdiff, tdiff;
|
|
434 |
CPUPerfTicks* pticks;
|
|
435 |
CPUPerfTicks tmp;
|
|
436 |
double user_load;
|
|
437 |
|
|
438 |
*pkernelLoad = 0.0;
|
|
439 |
|
|
440 |
if (target == CPU_LOAD_VM_ONLY) {
|
|
441 |
pticks = &counters->jvmTicks;
|
|
442 |
} else if (-1 == which_logical_cpu) {
|
|
443 |
pticks = &counters->cpus[counters->nProcs];
|
|
444 |
} else {
|
|
445 |
pticks = &counters->cpus[which_logical_cpu];
|
|
446 |
}
|
|
447 |
|
|
448 |
tmp = *pticks;
|
|
449 |
|
|
450 |
if (target == CPU_LOAD_VM_ONLY) {
|
|
451 |
if (get_jvm_ticks(pticks) != OS_OK) {
|
|
452 |
return -1.0;
|
|
453 |
}
|
|
454 |
} else if (get_total_ticks(which_logical_cpu, pticks) != OS_OK) {
|
|
455 |
return -1.0;
|
|
456 |
}
|
|
457 |
|
|
458 |
// seems like we sometimes end up with less kernel ticks when
|
|
459 |
// reading /proc/self/stat a second time, timing issue between cpus?
|
|
460 |
if (pticks->usedKernel < tmp.usedKernel) {
|
|
461 |
kdiff = 0;
|
|
462 |
} else {
|
|
463 |
kdiff = pticks->usedKernel - tmp.usedKernel;
|
|
464 |
}
|
|
465 |
tdiff = pticks->total - tmp.total;
|
|
466 |
udiff = pticks->used - tmp.used;
|
|
467 |
|
|
468 |
if (tdiff == 0) {
|
|
469 |
return 0.0;
|
|
470 |
} else if (tdiff < (udiff + kdiff)) {
|
|
471 |
tdiff = udiff + kdiff;
|
|
472 |
}
|
|
473 |
*pkernelLoad = (kdiff / (double)tdiff);
|
|
474 |
// BUG9044876, normalize return values to sane values
|
|
475 |
*pkernelLoad = MAX2<double>(*pkernelLoad, 0.0);
|
|
476 |
*pkernelLoad = MIN2<double>(*pkernelLoad, 1.0);
|
|
477 |
|
|
478 |
user_load = (udiff / (double)tdiff);
|
|
479 |
user_load = MAX2<double>(user_load, 0.0);
|
|
480 |
user_load = MIN2<double>(user_load, 1.0);
|
|
481 |
|
|
482 |
return user_load;
|
|
483 |
}
|
|
484 |
|
|
485 |
static int SCANF_ARGS(1, 2) parse_stat(_SCANFMT_ const char* fmt, ...) {
|
|
486 |
FILE *f;
|
|
487 |
va_list args;
|
|
488 |
|
|
489 |
va_start(args, fmt);
|
|
490 |
|
|
491 |
if ((f = open_statfile()) == NULL) {
|
|
492 |
va_end(args);
|
|
493 |
return OS_ERR;
|
|
494 |
}
|
|
495 |
for (;;) {
|
|
496 |
char line[80];
|
|
497 |
if (fgets(line, sizeof(line), f) != NULL) {
|
|
498 |
if (vsscanf(line, fmt, args) == 1) {
|
|
499 |
fclose(f);
|
|
500 |
va_end(args);
|
|
501 |
return OS_OK;
|
|
502 |
}
|
|
503 |
} else {
|
|
504 |
fclose(f);
|
|
505 |
va_end(args);
|
|
506 |
return OS_ERR;
|
|
507 |
}
|
|
508 |
}
|
|
509 |
}
|
|
510 |
|
|
511 |
static int get_noof_context_switches(uint64_t* switches) {
|
|
512 |
return parse_stat("ctxt " UINT64_FORMAT "\n", switches);
|
|
513 |
}
|
|
514 |
|
|
515 |
/** returns boot time in _seconds_ since epoch */
|
|
516 |
static int get_boot_time(uint64_t* time) {
|
|
517 |
return parse_stat("btime " UINT64_FORMAT "\n", time);
|
|
518 |
}
|
|
519 |
|
|
520 |
static int perf_context_switch_rate(double* rate) {
|
|
521 |
static pthread_mutex_t contextSwitchLock = PTHREAD_MUTEX_INITIALIZER;
|
|
522 |
static uint64_t lastTime;
|
|
523 |
static uint64_t lastSwitches;
|
|
524 |
static double lastRate;
|
|
525 |
|
|
526 |
uint64_t lt = 0;
|
|
527 |
int res = 0;
|
|
528 |
|
|
529 |
if (lastTime == 0) {
|
|
530 |
uint64_t tmp;
|
|
531 |
if (get_boot_time(&tmp) < 0) {
|
|
532 |
return OS_ERR;
|
|
533 |
}
|
|
534 |
lt = tmp * 1000;
|
|
535 |
}
|
|
536 |
|
|
537 |
res = OS_OK;
|
|
538 |
|
|
539 |
pthread_mutex_lock(&contextSwitchLock);
|
|
540 |
{
|
|
541 |
|
|
542 |
uint64_t sw;
|
|
543 |
s8 t, d;
|
|
544 |
|
|
545 |
if (lastTime == 0) {
|
|
546 |
lastTime = lt;
|
|
547 |
}
|
|
548 |
|
|
549 |
t = os::javaTimeMillis();
|
|
550 |
d = t - lastTime;
|
|
551 |
|
|
552 |
if (d == 0) {
|
|
553 |
*rate = lastRate;
|
|
554 |
} else if (!get_noof_context_switches(&sw)) {
|
|
555 |
*rate = ( (double)(sw - lastSwitches) / d ) * 1000;
|
|
556 |
lastRate = *rate;
|
|
557 |
lastSwitches = sw;
|
|
558 |
lastTime = t;
|
|
559 |
} else {
|
|
560 |
*rate = 0;
|
|
561 |
res = OS_ERR;
|
|
562 |
}
|
|
563 |
if (*rate <= 0) {
|
|
564 |
*rate = 0;
|
|
565 |
lastRate = 0;
|
|
566 |
}
|
|
567 |
}
|
|
568 |
pthread_mutex_unlock(&contextSwitchLock);
|
|
569 |
|
|
570 |
return res;
|
|
571 |
}
|
|
572 |
|
|
573 |
class CPUPerformanceInterface::CPUPerformance : public CHeapObj<mtInternal> {
|
|
574 |
friend class CPUPerformanceInterface;
|
|
575 |
private:
|
|
576 |
CPUPerfCounters _counters;
|
|
577 |
|
|
578 |
int cpu_load(int which_logical_cpu, double* cpu_load);
|
|
579 |
int context_switch_rate(double* rate);
|
|
580 |
int cpu_load_total_process(double* cpu_load);
|
|
581 |
int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad);
|
|
582 |
|
|
583 |
public:
|
|
584 |
CPUPerformance();
|
|
585 |
bool initialize();
|
|
586 |
~CPUPerformance();
|
|
587 |
};
|
|
588 |
|
|
589 |
CPUPerformanceInterface::CPUPerformance::CPUPerformance() {
|
|
590 |
_counters.nProcs = os::active_processor_count();
|
|
591 |
_counters.cpus = NULL;
|
|
592 |
}
|
|
593 |
|
|
594 |
bool CPUPerformanceInterface::CPUPerformance::initialize() {
|
|
595 |
size_t tick_array_size = (_counters.nProcs +1) * sizeof(CPUPerfTicks);
|
|
596 |
_counters.cpus = (CPUPerfTicks*)NEW_C_HEAP_ARRAY(char, tick_array_size, mtInternal);
|
|
597 |
if (NULL == _counters.cpus) {
|
|
598 |
return false;
|
|
599 |
}
|
|
600 |
memset(_counters.cpus, 0, tick_array_size);
|
|
601 |
|
|
602 |
// For the CPU load total
|
|
603 |
get_total_ticks(-1, &_counters.cpus[_counters.nProcs]);
|
|
604 |
|
|
605 |
// For each CPU
|
|
606 |
for (int i = 0; i < _counters.nProcs; i++) {
|
|
607 |
get_total_ticks(i, &_counters.cpus[i]);
|
|
608 |
}
|
|
609 |
// For JVM load
|
|
610 |
get_jvm_ticks(&_counters.jvmTicks);
|
|
611 |
|
|
612 |
// initialize context switch system
|
|
613 |
// the double is only for init
|
|
614 |
double init_ctx_switch_rate;
|
|
615 |
perf_context_switch_rate(&init_ctx_switch_rate);
|
|
616 |
|
|
617 |
return true;
|
|
618 |
}
|
|
619 |
|
|
620 |
CPUPerformanceInterface::CPUPerformance::~CPUPerformance() {
|
|
621 |
if (_counters.cpus != NULL) {
|
|
622 |
FREE_C_HEAP_ARRAY(char, _counters.cpus);
|
|
623 |
}
|
|
624 |
}
|
|
625 |
|
|
626 |
int CPUPerformanceInterface::CPUPerformance::cpu_load(int which_logical_cpu, double* cpu_load) {
|
|
627 |
double u, s;
|
|
628 |
u = get_cpu_load(which_logical_cpu, &_counters, &s, CPU_LOAD_GLOBAL);
|
|
629 |
if (u < 0) {
|
|
630 |
*cpu_load = 0.0;
|
|
631 |
return OS_ERR;
|
|
632 |
}
|
|
633 |
// Cap total systemload to 1.0
|
|
634 |
*cpu_load = MIN2<double>((u + s), 1.0);
|
|
635 |
return OS_OK;
|
|
636 |
}
|
|
637 |
|
|
638 |
int CPUPerformanceInterface::CPUPerformance::cpu_load_total_process(double* cpu_load) {
|
|
639 |
double u, s;
|
|
640 |
u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
|
|
641 |
if (u < 0) {
|
|
642 |
*cpu_load = 0.0;
|
|
643 |
return OS_ERR;
|
|
644 |
}
|
|
645 |
*cpu_load = u + s;
|
|
646 |
return OS_OK;
|
|
647 |
}
|
|
648 |
|
|
649 |
int CPUPerformanceInterface::CPUPerformance::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) {
|
|
650 |
double u, s, t;
|
|
651 |
|
|
652 |
assert(pjvmUserLoad != NULL, "pjvmUserLoad not inited");
|
|
653 |
assert(pjvmKernelLoad != NULL, "pjvmKernelLoad not inited");
|
|
654 |
assert(psystemTotalLoad != NULL, "psystemTotalLoad not inited");
|
|
655 |
|
|
656 |
u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
|
|
657 |
if (u < 0) {
|
|
658 |
*pjvmUserLoad = 0.0;
|
|
659 |
*pjvmKernelLoad = 0.0;
|
|
660 |
*psystemTotalLoad = 0.0;
|
|
661 |
return OS_ERR;
|
|
662 |
}
|
|
663 |
|
|
664 |
cpu_load(-1, &t);
|
|
665 |
// clamp at user+system and 1.0
|
|
666 |
if (u + s > t) {
|
|
667 |
t = MIN2<double>(u + s, 1.0);
|
|
668 |
}
|
|
669 |
|
|
670 |
*pjvmUserLoad = u;
|
|
671 |
*pjvmKernelLoad = s;
|
|
672 |
*psystemTotalLoad = t;
|
|
673 |
|
|
674 |
return OS_OK;
|
|
675 |
}
|
|
676 |
|
|
677 |
int CPUPerformanceInterface::CPUPerformance::context_switch_rate(double* rate) {
|
|
678 |
return perf_context_switch_rate(rate);
|
|
679 |
}
|
|
680 |
|
|
681 |
CPUPerformanceInterface::CPUPerformanceInterface() {
|
|
682 |
_impl = NULL;
|
|
683 |
}
|
|
684 |
|
|
685 |
bool CPUPerformanceInterface::initialize() {
|
|
686 |
_impl = new CPUPerformanceInterface::CPUPerformance();
|
|
687 |
return NULL == _impl ? false : _impl->initialize();
|
|
688 |
}
|
|
689 |
|
|
690 |
CPUPerformanceInterface::~CPUPerformanceInterface() {
|
|
691 |
if (_impl != NULL) {
|
|
692 |
delete _impl;
|
|
693 |
}
|
|
694 |
}
|
|
695 |
|
|
696 |
int CPUPerformanceInterface::cpu_load(int which_logical_cpu, double* cpu_load) const {
|
|
697 |
return _impl->cpu_load(which_logical_cpu, cpu_load);
|
|
698 |
}
|
|
699 |
|
|
700 |
int CPUPerformanceInterface::cpu_load_total_process(double* cpu_load) const {
|
|
701 |
return _impl->cpu_load_total_process(cpu_load);
|
|
702 |
}
|
|
703 |
|
|
704 |
int CPUPerformanceInterface::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) const {
|
|
705 |
return _impl->cpu_loads_process(pjvmUserLoad, pjvmKernelLoad, psystemTotalLoad);
|
|
706 |
}
|
|
707 |
|
|
708 |
int CPUPerformanceInterface::context_switch_rate(double* rate) const {
|
|
709 |
return _impl->context_switch_rate(rate);
|
|
710 |
}
|
|
711 |
|
|
712 |
class SystemProcessInterface::SystemProcesses : public CHeapObj<mtInternal> {
|
|
713 |
friend class SystemProcessInterface;
|
|
714 |
private:
|
|
715 |
class ProcessIterator : public CHeapObj<mtInternal> {
|
|
716 |
friend class SystemProcessInterface::SystemProcesses;
|
|
717 |
private:
|
|
718 |
DIR* _dir;
|
|
719 |
struct dirent* _entry;
|
|
720 |
bool _valid;
|
|
721 |
char _exeName[PATH_MAX];
|
|
722 |
char _exePath[PATH_MAX];
|
|
723 |
|
|
724 |
ProcessIterator();
|
|
725 |
~ProcessIterator();
|
|
726 |
bool initialize();
|
|
727 |
|
|
728 |
bool is_valid() const { return _valid; }
|
|
729 |
bool is_valid_entry(struct dirent* entry) const;
|
|
730 |
bool is_dir(const char* name) const;
|
|
731 |
int fsize(const char* name, uint64_t& size) const;
|
|
732 |
|
|
733 |
char* allocate_string(const char* str) const;
|
|
734 |
void get_exe_name();
|
|
735 |
char* get_exe_path();
|
|
736 |
char* get_cmdline();
|
|
737 |
|
|
738 |
int current(SystemProcess* process_info);
|
|
739 |
int next_process();
|
|
740 |
};
|
|
741 |
|
|
742 |
ProcessIterator* _iterator;
|
|
743 |
SystemProcesses();
|
|
744 |
bool initialize();
|
|
745 |
~SystemProcesses();
|
|
746 |
|
|
747 |
//information about system processes
|
|
748 |
int system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const;
|
|
749 |
};
|
|
750 |
|
|
751 |
bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_dir(const char* name) const {
|
|
752 |
struct stat mystat;
|
|
753 |
int ret_val = 0;
|
|
754 |
|
|
755 |
ret_val = stat(name, &mystat);
|
|
756 |
if (ret_val < 0) {
|
|
757 |
return false;
|
|
758 |
}
|
|
759 |
ret_val = S_ISDIR(mystat.st_mode);
|
|
760 |
return ret_val > 0;
|
|
761 |
}
|
|
762 |
|
|
763 |
int SystemProcessInterface::SystemProcesses::ProcessIterator::fsize(const char* name, uint64_t& size) const {
|
|
764 |
assert(name != NULL, "name pointer is NULL!");
|
|
765 |
size = 0;
|
|
766 |
struct stat fbuf;
|
|
767 |
|
|
768 |
if (stat(name, &fbuf) < 0) {
|
|
769 |
return OS_ERR;
|
|
770 |
}
|
|
771 |
size = fbuf.st_size;
|
|
772 |
return OS_OK;
|
|
773 |
}
|
|
774 |
|
|
775 |
// if it has a numeric name, is a directory and has a 'stat' file in it
|
|
776 |
bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_valid_entry(struct dirent* entry) const {
|
|
777 |
char buffer[PATH_MAX];
|
|
778 |
uint64_t size = 0;
|
|
779 |
|
|
780 |
if (atoi(entry->d_name) != 0) {
|
|
781 |
jio_snprintf(buffer, PATH_MAX, "/proc/%s", entry->d_name);
|
|
782 |
buffer[PATH_MAX - 1] = '\0';
|
|
783 |
|
|
784 |
if (is_dir(buffer)) {
|
|
785 |
jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", entry->d_name);
|
|
786 |
buffer[PATH_MAX - 1] = '\0';
|
|
787 |
if (fsize(buffer, size) != OS_ERR) {
|
|
788 |
return true;
|
|
789 |
}
|
|
790 |
}
|
|
791 |
}
|
|
792 |
return false;
|
|
793 |
}
|
|
794 |
|
|
795 |
// get exe-name from /proc/<pid>/stat
|
|
796 |
void SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_name() {
|
|
797 |
FILE* fp;
|
|
798 |
char buffer[PATH_MAX];
|
|
799 |
|
|
800 |
jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", _entry->d_name);
|
|
801 |
buffer[PATH_MAX - 1] = '\0';
|
|
802 |
if ((fp = fopen(buffer, "r")) != NULL) {
|
|
803 |
if (fgets(buffer, PATH_MAX, fp) != NULL) {
|
|
804 |
char* start, *end;
|
|
805 |
// exe-name is between the first pair of ( and )
|
|
806 |
start = strchr(buffer, '(');
|
|
807 |
if (start != NULL && start[1] != '\0') {
|
|
808 |
start++;
|
|
809 |
end = strrchr(start, ')');
|
|
810 |
if (end != NULL) {
|
|
811 |
size_t len;
|
|
812 |
len = MIN2<size_t>(end - start, sizeof(_exeName) - 1);
|
|
813 |
memcpy(_exeName, start, len);
|
|
814 |
_exeName[len] = '\0';
|
|
815 |
}
|
|
816 |
}
|
|
817 |
}
|
|
818 |
fclose(fp);
|
|
819 |
}
|
|
820 |
}
|
|
821 |
|
|
822 |
// get command line from /proc/<pid>/cmdline
|
|
823 |
char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_cmdline() {
|
|
824 |
FILE* fp;
|
|
825 |
char buffer[PATH_MAX];
|
|
826 |
char* cmdline = NULL;
|
|
827 |
|
|
828 |
jio_snprintf(buffer, PATH_MAX, "/proc/%s/cmdline", _entry->d_name);
|
|
829 |
buffer[PATH_MAX - 1] = '\0';
|
|
830 |
if ((fp = fopen(buffer, "r")) != NULL) {
|
|
831 |
size_t size = 0;
|
|
832 |
char dummy;
|
|
833 |
|
|
834 |
// find out how long the file is (stat always returns 0)
|
|
835 |
while (fread(&dummy, 1, 1, fp) == 1) {
|
|
836 |
size++;
|
|
837 |
}
|
|
838 |
if (size > 0) {
|
|
839 |
cmdline = NEW_C_HEAP_ARRAY(char, size + 1, mtInternal);
|
|
840 |
if (cmdline != NULL) {
|
|
841 |
cmdline[0] = '\0';
|
|
842 |
if (fseek(fp, 0, SEEK_SET) == 0) {
|
|
843 |
if (fread(cmdline, 1, size, fp) == size) {
|
|
844 |
// the file has the arguments separated by '\0',
|
|
845 |
// so we translate '\0' to ' '
|
|
846 |
for (size_t i = 0; i < size; i++) {
|
|
847 |
if (cmdline[i] == '\0') {
|
|
848 |
cmdline[i] = ' ';
|
|
849 |
}
|
|
850 |
}
|
|
851 |
cmdline[size] = '\0';
|
|
852 |
}
|
|
853 |
}
|
|
854 |
}
|
|
855 |
}
|
|
856 |
fclose(fp);
|
|
857 |
}
|
|
858 |
return cmdline;
|
|
859 |
}
|
|
860 |
|
|
861 |
// get full path to exe from /proc/<pid>/exe symlink
|
|
862 |
char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_path() {
|
|
863 |
char buffer[PATH_MAX];
|
|
864 |
|
|
865 |
jio_snprintf(buffer, PATH_MAX, "/proc/%s/exe", _entry->d_name);
|
|
866 |
buffer[PATH_MAX - 1] = '\0';
|
|
867 |
return realpath(buffer, _exePath);
|
|
868 |
}
|
|
869 |
|
|
870 |
char* SystemProcessInterface::SystemProcesses::ProcessIterator::allocate_string(const char* str) const {
|
|
871 |
if (str != NULL) {
|
|
872 |
size_t len = strlen(str);
|
|
873 |
char* tmp = NEW_C_HEAP_ARRAY(char, len+1, mtInternal);
|
|
874 |
strncpy(tmp, str, len);
|
|
875 |
tmp[len] = '\0';
|
|
876 |
return tmp;
|
|
877 |
}
|
|
878 |
return NULL;
|
|
879 |
}
|
|
880 |
|
|
881 |
int SystemProcessInterface::SystemProcesses::ProcessIterator::current(SystemProcess* process_info) {
|
|
882 |
if (!is_valid()) {
|
|
883 |
return OS_ERR;
|
|
884 |
}
|
|
885 |
|
|
886 |
process_info->set_pid(atoi(_entry->d_name));
|
|
887 |
|
|
888 |
get_exe_name();
|
|
889 |
process_info->set_name(allocate_string(_exeName));
|
|
890 |
|
|
891 |
if (get_exe_path() != NULL) {
|
|
892 |
process_info->set_path(allocate_string(_exePath));
|
|
893 |
}
|
|
894 |
|
|
895 |
char* cmdline = NULL;
|
|
896 |
cmdline = get_cmdline();
|
|
897 |
if (cmdline != NULL) {
|
|
898 |
process_info->set_command_line(allocate_string(cmdline));
|
|
899 |
FREE_C_HEAP_ARRAY(char, cmdline);
|
|
900 |
}
|
|
901 |
|
|
902 |
return OS_OK;
|
|
903 |
}
|
|
904 |
|
|
905 |
int SystemProcessInterface::SystemProcesses::ProcessIterator::next_process() {
|
|
906 |
struct dirent* entry;
|
|
907 |
|
|
908 |
if (!is_valid()) {
|
|
909 |
return OS_ERR;
|
|
910 |
}
|
|
911 |
|
|
912 |
do {
|
|
913 |
entry = os::readdir(_dir, _entry);
|
|
914 |
if (entry == NULL) {
|
|
915 |
// error
|
|
916 |
_valid = false;
|
|
917 |
return OS_ERR;
|
|
918 |
}
|
|
919 |
if (_entry == NULL) {
|
|
920 |
// reached end
|
|
921 |
_valid = false;
|
|
922 |
return OS_ERR;
|
|
923 |
}
|
|
924 |
} while(!is_valid_entry(_entry));
|
|
925 |
|
|
926 |
_valid = true;
|
|
927 |
return OS_OK;
|
|
928 |
}
|
|
929 |
|
|
930 |
SystemProcessInterface::SystemProcesses::ProcessIterator::ProcessIterator() {
|
|
931 |
_dir = NULL;
|
|
932 |
_entry = NULL;
|
|
933 |
_valid = false;
|
|
934 |
}
|
|
935 |
|
|
936 |
bool SystemProcessInterface::SystemProcesses::ProcessIterator::initialize() {
|
|
937 |
_dir = opendir("/proc");
|
|
938 |
_entry = (struct dirent*)NEW_C_HEAP_ARRAY(char, sizeof(struct dirent) + NAME_MAX + 1, mtInternal);
|
|
939 |
if (NULL == _entry) {
|
|
940 |
return false;
|
|
941 |
}
|
|
942 |
_valid = true;
|
|
943 |
next_process();
|
|
944 |
|
|
945 |
return true;
|
|
946 |
}
|
|
947 |
|
|
948 |
SystemProcessInterface::SystemProcesses::ProcessIterator::~ProcessIterator() {
|
|
949 |
if (_entry != NULL) {
|
|
950 |
FREE_C_HEAP_ARRAY(char, _entry);
|
|
951 |
}
|
|
952 |
if (_dir != NULL) {
|
|
953 |
closedir(_dir);
|
|
954 |
}
|
|
955 |
}
|
|
956 |
|
|
957 |
SystemProcessInterface::SystemProcesses::SystemProcesses() {
|
|
958 |
_iterator = NULL;
|
|
959 |
}
|
|
960 |
|
|
961 |
bool SystemProcessInterface::SystemProcesses::initialize() {
|
|
962 |
_iterator = new SystemProcessInterface::SystemProcesses::ProcessIterator();
|
|
963 |
return NULL == _iterator ? false : _iterator->initialize();
|
|
964 |
}
|
|
965 |
|
|
966 |
SystemProcessInterface::SystemProcesses::~SystemProcesses() {
|
|
967 |
if (_iterator != NULL) {
|
|
968 |
delete _iterator;
|
|
969 |
}
|
|
970 |
}
|
|
971 |
|
|
972 |
int SystemProcessInterface::SystemProcesses::system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const {
|
|
973 |
assert(system_processes != NULL, "system_processes pointer is NULL!");
|
|
974 |
assert(no_of_sys_processes != NULL, "system_processes counter pointers is NULL!");
|
|
975 |
assert(_iterator != NULL, "iterator is NULL!");
|
|
976 |
|
|
977 |
// initialize pointers
|
|
978 |
*no_of_sys_processes = 0;
|
|
979 |
*system_processes = NULL;
|
|
980 |
|
|
981 |
while (_iterator->is_valid()) {
|
|
982 |
SystemProcess* tmp = new SystemProcess();
|
|
983 |
_iterator->current(tmp);
|
|
984 |
|
|
985 |
//if already existing head
|
|
986 |
if (*system_processes != NULL) {
|
|
987 |
//move "first to second"
|
|
988 |
tmp->set_next(*system_processes);
|
|
989 |
}
|
|
990 |
// new head
|
|
991 |
*system_processes = tmp;
|
|
992 |
// increment
|
|
993 |
(*no_of_sys_processes)++;
|
|
994 |
// step forward
|
|
995 |
_iterator->next_process();
|
|
996 |
}
|
|
997 |
return OS_OK;
|
|
998 |
}
|
|
999 |
|
|
1000 |
int SystemProcessInterface::system_processes(SystemProcess** system_procs, int* no_of_sys_processes) const {
|
|
1001 |
return _impl->system_processes(system_procs, no_of_sys_processes);
|
|
1002 |
}
|
|
1003 |
|
|
1004 |
SystemProcessInterface::SystemProcessInterface() {
|
|
1005 |
_impl = NULL;
|
|
1006 |
}
|
|
1007 |
|
|
1008 |
bool SystemProcessInterface::initialize() {
|
|
1009 |
_impl = new SystemProcessInterface::SystemProcesses();
|
|
1010 |
return NULL == _impl ? false : _impl->initialize();
|
|
1011 |
}
|
|
1012 |
|
|
1013 |
SystemProcessInterface::~SystemProcessInterface() {
|
|
1014 |
if (_impl != NULL) {
|
|
1015 |
delete _impl;
|
|
1016 |
}
|
|
1017 |
}
|
|
1018 |
|
|
1019 |
CPUInformationInterface::CPUInformationInterface() {
|
|
1020 |
_cpu_info = NULL;
|
|
1021 |
}
|
|
1022 |
|
|
1023 |
bool CPUInformationInterface::initialize() {
|
|
1024 |
_cpu_info = new CPUInformation();
|
|
1025 |
if (NULL == _cpu_info) {
|
|
1026 |
return false;
|
|
1027 |
}
|
|
1028 |
_cpu_info->set_number_of_hardware_threads(VM_Version_Ext::number_of_threads());
|
|
1029 |
_cpu_info->set_number_of_cores(VM_Version_Ext::number_of_cores());
|
|
1030 |
_cpu_info->set_number_of_sockets(VM_Version_Ext::number_of_sockets());
|
|
1031 |
_cpu_info->set_cpu_name(VM_Version_Ext::cpu_name());
|
|
1032 |
_cpu_info->set_cpu_description(VM_Version_Ext::cpu_description());
|
|
1033 |
|
|
1034 |
return true;
|
|
1035 |
}
|
|
1036 |
|
|
1037 |
CPUInformationInterface::~CPUInformationInterface() {
|
|
1038 |
if (_cpu_info != NULL) {
|
|
1039 |
if (_cpu_info->cpu_name() != NULL) {
|
|
1040 |
const char* cpu_name = _cpu_info->cpu_name();
|
|
1041 |
FREE_C_HEAP_ARRAY(char, cpu_name);
|
|
1042 |
_cpu_info->set_cpu_name(NULL);
|
|
1043 |
}
|
|
1044 |
if (_cpu_info->cpu_description() != NULL) {
|
|
1045 |
const char* cpu_desc = _cpu_info->cpu_description();
|
|
1046 |
FREE_C_HEAP_ARRAY(char, cpu_desc);
|
|
1047 |
_cpu_info->set_cpu_description(NULL);
|
|
1048 |
}
|
|
1049 |
delete _cpu_info;
|
|
1050 |
}
|
|
1051 |
}
|
|
1052 |
|
|
1053 |
int CPUInformationInterface::cpu_information(CPUInformation& cpu_info) {
|
|
1054 |
if (_cpu_info == NULL) {
|
|
1055 |
return OS_ERR;
|
|
1056 |
}
|
|
1057 |
|
|
1058 |
cpu_info = *_cpu_info; // shallow copy assignment
|
|
1059 |
return OS_OK;
|
|
1060 |
}
|