src/proc_loadavg.c

   1 #ifdef HAVE_CONFIG_H
   2 #include <config.h>
   3 #endif
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #include "common.h"
   9 #include "appconfig.h"
  10 #include "procfile.h"
  11 #include "rrd.h"
  12 #include "plugin_proc.h"
  13
  14 int do_proc_loadavg(int update_every, unsigned long long dt) {
  15         static procfile *ff = NULL;
  16         static int do_loadavg = -1, do_all_processes = -1;
  17
  18         if(dt) {};
  19
  20         if(!ff) {
  21                 char filename[FILENAME_MAX + 1];
  22                 snprintf(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/loadavg");
  23                 ff = procfile_open(config_get("plugin:proc:/proc/loadavg", "filename to monitor", filename), " \t,:|/", PROCFILE_FLAG_DEFAULT);
  24         }
  25         if(!ff) return 1;
  26
  27         ff = procfile_readall(ff);
  28         if(!ff) return 0; // we return 0, so that we will retry to open it next time
  29
  30         if(do_loadavg == -1)            do_loadavg                      = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
  31         if(do_all_processes == -1)      do_all_processes        = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
  32
  33         if(procfile_lines(ff) < 1) {
  34                 error("/proc/loadavg has no lines.");
  35                 return 1;
  36         }
  37         if(procfile_linewords(ff, 0) < 6) {
  38                 error("/proc/loadavg has less than 6 words in it.");
  39                 return 1;
  40         }
  41
  42         double load1 = strtod(procfile_lineword(ff, 0, 0), NULL);
  43         double load5 = strtod(procfile_lineword(ff, 0, 1), NULL);
  44         double load15 = strtod(procfile_lineword(ff, 0, 2), NULL);
  45
  46         //unsigned long long running_processes  = strtoull(procfile_lineword(ff, 0, 3), NULL, 10);
  47         unsigned long long active_processes             = strtoull(procfile_lineword(ff, 0, 4), NULL, 10);
  48         //unsigned long long next_pid                           = strtoull(procfile_lineword(ff, 0, 5), NULL, 10);
  49
  50
  51         RRDSET *st;
  52
  53         // --------------------------------------------------------------------
  54
  55         if(do_loadavg) {
  56                 st = rrdset_find_byname("system.load");
  57                 if(!st) {
  58                         st = rrdset_create("system", "load", NULL, "load", NULL, "System Load Average", "load", 100, update_every, RRDSET_TYPE_LINE);
  59
  60                         rrddim_add(st, "load1", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  61                         rrddim_add(st, "load5", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  62                         rrddim_add(st, "load15", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  63                 }
  64                 else rrdset_next(st);
  65
  66                 rrddim_set(st, "load1", load1 * 1000);
  67                 rrddim_set(st, "load5", load5 * 1000);
  68                 rrddim_set(st, "load15", load15 * 1000);
  69                 rrdset_done(st);
  70         }
  71
  72         // --------------------------------------------------------------------
  73
  74         if(do_all_processes) {
  75                 st = rrdset_find_byname("system.active_processes");
  76                 if(!st) {
  77                         st = rrdset_create("system", "active_processes", NULL, "processes", NULL, "System Active Processes", "processes", 750, update_every, RRDSET_TYPE_LINE);
  78
  79                         rrddim_add(st, "active", NULL, 1, 1, RRDDIM_ABSOLUTE);
  80                 }
  81                 else rrdset_next(st);
  82
  83                 rrddim_set(st, "active", active_processes);
  84                 rrdset_done(st);
  85         }
  86
  87         return 0;
  88 }