wmcpuload/src/cpu_irix.c

   1 /*
   2  * cpu_irix.c - module to get cpu usage, for IRIX 6.5 and IRIX64 6.5
   3  *
   4  * Copyright (C) 2002 Jonathan C. Patschke <jp@celestrion.net>
   5  * Copyright (C) 2002 Seiichi SATO <ssato@sh.rim.or.jp>
   6  *
   7  * licensed under the GPL
   8  */
   9
  10 #ifdef HAVE_CONFIG_H
  11 #include "config.h"
  12 #endif
  13
  14 #include <stdio.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include "cpu.h"
  19
  20 #include <sys/types.h>
  21 #include <sys/sysmp.h>
  22 #include <sys/sysinfo.h>
  23 #include <sys/sysget.h>
  24
  25 int cpuCount;
  26
  27 void
  28 cpu_init(void)
  29 {
  30     cpuCount = (int)sysmp(MP_NPROCS);
  31     return;
  32 }
  33
  34 /* returns current CPU usage in percent */
  35 int
  36 cpu_get_usage(cpu_options *opts)
  37 {
  38     struct sgt_cookie cookie;
  39     struct sysinfo info;
  40     long cpuload, cputotal;
  41     static long ocpuload, ocputotal;
  42     int result, i;
  43
  44     if (opts->cpu_number >= cpuCount) return 0;
  45     SGT_COOKIE_INIT(&cookie);
  46     if (opts->cpu_number < 1) {
  47       /* Get stats for all CPUs */
  48       cpuload  = 0;
  49       cputotal = 0;
  50       for (i = 0 ; i < cpuCount ; i++) {
  51         SGT_COOKIE_SET_CPU(&cookie, i);
  52         memset(((void *)&info), 0x00, sizeof(info));
  53         sysget(SGT_SINFO_CPU, ((char *)&info), sizeof(info),
  54                SGT_READ, &cookie);
  55         cpuload  += info.cpu[CPU_USER] + info.cpu[CPU_KERNEL] +
  56                     info.cpu[CPU_WAIT] + info.cpu[CPU_SXBRK]  +
  57                     info.cpu[CPU_INTR];
  58         cputotal += cpuload + info.cpu[CPU_IDLE];
  59       };
  60     } else {
  61       SGT_COOKIE_SET_CPU(&cookie, opts->cpu_number);
  62       memset(((void *)&info), 0x00, sizeof(info));
  63       sysget(SGT_SINFO_CPU, ((char *)&info), sizeof(info),
  64              SGT_READ, &cookie);
  65       cpuload  = info.cpu[CPU_USER] + info.cpu[CPU_KERNEL] +
  66                  info.cpu[CPU_WAIT] + info.cpu[CPU_SXBRK]  +
  67                  info.cpu[CPU_INTR];
  68       cputotal = cpuload + info.cpu[CPU_IDLE];
  69     }
  70 #ifdef DEBUG
  71     fprintf(stderr, "!!!%d/%d: %d, %d, %d, %d, %d, %d\n", opts->cpu_number,
  72             cpuCount, info.cpu[CPU_USER], info.cpu[CPU_KERNEL], info.cpu[CPU_WAIT],
  73             info.cpu[CPU_SXBRK], info.cpu[CPU_INTR], info.cpu[CPU_IDLE]);
  74 #endif
  75
  76     result    = ((cpuload - ocpuload) * 100) / (cputotal - ocputotal);
  77     ocpuload  = cpuload;
  78     ocputotal = cputotal;
  79
  80     return result;
  81 }