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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org |
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* Copyright (C) 2000-2004 i-scream |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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* $Id: cpu_stats.c,v 1.17 2004/01/19 16:49:21 tdb Exp $ |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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#include <time.h> |
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#include "statgrab.h" |
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#ifdef SOLARIS |
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#include <kstat.h> |
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#include <sys/sysinfo.h> |
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#include <string.h> |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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#include <stdio.h> |
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#endif |
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#ifdef FREEBSD |
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#include <sys/sysctl.h> |
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#include <sys/dkstat.h> |
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#endif |
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#ifdef NETBSD |
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <sys/sysctl.h> |
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#include <sys/sched.h> |
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#endif |
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#ifdef OPENBSD |
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#include <sys/param.h> |
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#include <sys/sysctl.h> |
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#include <sys/dkstat.h> |
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#endif |
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|
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static cpu_states_t cpu_now; |
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static int cpu_now_uninit=1; |
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|
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cpu_states_t *get_cpu_totals(){ |
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|
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#ifdef SOLARIS |
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kstat_ctl_t *kc; |
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kstat_t *ksp; |
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cpu_stat_t cs; |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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FILE *f; |
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#endif |
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#ifdef ALLBSD |
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#ifndef FREEBSD |
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int mib[2]; |
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#endif |
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#ifdef NETBSD |
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u_int64_t cp_time[CPUSTATES]; |
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#else |
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long cp_time[CPUSTATES]; |
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#endif |
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size_t size; |
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#endif |
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|
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cpu_now.user=0; |
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/* Not stored in linux or freebsd */ |
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cpu_now.iowait=0; |
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cpu_now.kernel=0; |
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cpu_now.idle=0; |
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/* Not stored in linux or freebsd */ |
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cpu_now.swap=0; |
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cpu_now.total=0; |
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/* Not stored in solaris */ |
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cpu_now.nice=0; |
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|
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#ifdef SOLARIS |
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if ((kc = kstat_open()) == NULL) { |
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return NULL; |
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} |
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for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) { |
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if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue; |
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if (kstat_read(kc, ksp, &cs) == -1) { |
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continue; |
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} |
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cpu_now.user+=(long long)cs.cpu_sysinfo.cpu[CPU_USER]; |
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cpu_now.iowait+=(long long)cs.cpu_sysinfo.cpu[CPU_WAIT]; |
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cpu_now.kernel+=(long long)cs.cpu_sysinfo.cpu[CPU_KERNEL]; |
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cpu_now.idle+=(long long)cs.cpu_sysinfo.cpu[CPU_IDLE]; |
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cpu_now.swap+=(long long)cs.cpu_sysinfo.cpu[CPU_STATES]; |
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} |
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|
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cpu_now.total=cpu_now.user+cpu_now.iowait+cpu_now.kernel+cpu_now.idle+cpu_now.swap; |
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|
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kstat_close(kc); |
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#endif |
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#if defined(LINUX) || defined(CYGWIN) |
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if ((f=fopen("/proc/stat", "r" ))==NULL) { |
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return NULL; |
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} |
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/* The very first line should be cpu */ |
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if((fscanf(f, "cpu %lld %lld %lld %lld", \ |
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&cpu_now.user, \ |
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&cpu_now.nice, \ |
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&cpu_now.kernel, \ |
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&cpu_now.idle)) != 4){ |
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fclose(f); |
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return NULL; |
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} |
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|
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fclose(f); |
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|
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cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle; |
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#endif |
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#ifdef ALLBSD |
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#ifdef FREEBSD |
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size = sizeof cp_time; |
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if (sysctlbyname("kern.cp_time", &cp_time, &size, NULL, 0) < 0){ |
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return NULL; |
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} |
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#else |
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mib[0] = CTL_KERN; |
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#ifdef NETBSD |
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mib[1] = KERN_CP_TIME; |
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#else |
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mib[1] = KERN_CPTIME; |
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#endif |
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size = sizeof cp_time; |
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if (sysctl(mib, 2, &cp_time, &size, NULL, 0) < 0) { |
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return NULL; |
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} |
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#endif |
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|
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cpu_now.user=cp_time[CP_USER]; |
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cpu_now.nice=cp_time[CP_NICE]; |
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cpu_now.kernel=cp_time[CP_SYS]; |
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cpu_now.idle=cp_time[CP_IDLE]; |
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|
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cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle; |
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|
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#endif |
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|
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cpu_now.systime=time(NULL); |
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cpu_now_uninit=0; |
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|
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|
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return &cpu_now; |
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} |
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|
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cpu_states_t *get_cpu_diff(){ |
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static cpu_states_t cpu_diff; |
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cpu_states_t cpu_then, *cpu_tmp; |
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|
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if (cpu_now_uninit){ |
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if((cpu_tmp=get_cpu_totals())==NULL){ |
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/* Should get_cpu_totals fail */ |
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return NULL; |
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} |
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return cpu_tmp; |
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} |
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|
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|
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cpu_then.user=cpu_now.user; |
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cpu_then.kernel=cpu_now.kernel; |
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cpu_then.idle=cpu_now.idle; |
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cpu_then.iowait=cpu_now.iowait; |
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cpu_then.swap=cpu_now.swap; |
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cpu_then.nice=cpu_now.nice; |
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cpu_then.total=cpu_now.total; |
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cpu_then.systime=cpu_now.systime; |
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|
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if((cpu_tmp=get_cpu_totals())==NULL){ |
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return NULL; |
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} |
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|
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cpu_diff.user = cpu_now.user - cpu_then.user; |
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cpu_diff.kernel = cpu_now.kernel - cpu_then.kernel; |
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cpu_diff.idle = cpu_now.idle - cpu_then.idle; |
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cpu_diff.iowait = cpu_now.iowait - cpu_then.iowait; |
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cpu_diff.swap = cpu_now.swap - cpu_then.swap; |
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cpu_diff.nice = cpu_now.nice - cpu_then.nice; |
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cpu_diff.total = cpu_now.total - cpu_then.total; |
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cpu_diff.systime = cpu_now.systime - cpu_then.systime; |
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|
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return &cpu_diff; |
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} |
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|
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cpu_percent_t *cpu_percent_usage(){ |
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static cpu_percent_t cpu_usage; |
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cpu_states_t *cs_ptr; |
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|
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cs_ptr=get_cpu_diff(); |
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if(cs_ptr==NULL){ |
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return NULL; |
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} |
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|
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cpu_usage.user = ((float)cs_ptr->user / (float)cs_ptr->total)*100; |
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cpu_usage.kernel = ((float)cs_ptr->kernel / (float)cs_ptr->total)*100; |
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cpu_usage.idle = ((float)cs_ptr->idle / (float)cs_ptr->total)*100; |
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cpu_usage.iowait = ((float)cs_ptr->iowait / (float)cs_ptr->total)*100; |
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cpu_usage.swap = ((float)cs_ptr->swap / (float)cs_ptr->total)*100; |
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cpu_usage.nice = ((float)cs_ptr->nice / (float)cs_ptr->total)*100; |
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cpu_usage.time_taken = cs_ptr->systime; |
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|
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return &cpu_usage; |
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|
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} |
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|
