src/proc_loadavg.c

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