src/freebsd_loadavg.c

   1 #include "common.h"
   2 #include <sys/vmmeter.h>
   3
   4 // FreeBSD calculates this once every 5 seconds
   5 #define MIN_LOADAVG_UPDATE_EVERY 5
   6
   7 int do_proc_loadavg(int update_every, unsigned long long dt) {
   8     (void)dt;
   9
  10     static int do_loadavg = -1, do_all_processes = -1;
  11     static unsigned long long last_loadavg_usec = 0;
  12     static RRDSET *load_chart = NULL, *processes_chart = NULL;
  13
  14     if(unlikely(do_loadavg == -1)) {
  15         do_loadavg          = config_get_boolean("plugin:proc:/proc/loadavg", "enable load average", 1);
  16         do_all_processes    = config_get_boolean("plugin:proc:/proc/loadavg", "enable total processes", 1);
  17     }
  18
  19     struct loadavg sysload;
  20
  21     if (unlikely(GETSYSCTL("vm.loadavg", sysload)))
  22         return 1;
  23
  24     double load1 = (double)sysload.ldavg[0] / sysload.fscale;
  25     double load5 = (double)sysload.ldavg[1] / sysload.fscale;
  26     double load15 = (double)sysload.ldavg[2] / sysload.fscale;
  27
  28     struct vmtotal total;
  29
  30     if (unlikely(GETSYSCTL("vm.vmtotal", total)))
  31         return 1;
  32
  33     unsigned long long active_processes     = total.t_rq + total.t_dw + total.t_pw + total.t_sl + total.t_sw;
  34
  35     // --------------------------------------------------------------------
  36
  37     if(last_loadavg_usec <= dt) {
  38         if(likely(do_loadavg)) {
  39             if(unlikely(!load_chart)) {
  40                 load_chart = rrdset_find_byname("system.load");
  41                 if(unlikely(!load_chart)) {
  42                     load_chart = rrdset_create("system", "load", NULL, "load", NULL, "System Load Average", "load", 100, (update_every < MIN_LOADAVG_UPDATE_EVERY) ? MIN_LOADAVG_UPDATE_EVERY : update_every, RRDSET_TYPE_LINE);
  43                     rrddim_add(load_chart, "load1", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  44                     rrddim_add(load_chart, "load5", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  45                     rrddim_add(load_chart, "load15", NULL, 1, 1000, RRDDIM_ABSOLUTE);
  46                 }
  47             }
  48             else
  49                 rrdset_next(load_chart);
  50
  51             rrddim_set(load_chart, "load1", (collected_number) (load1 * 1000));
  52             rrddim_set(load_chart, "load5", (collected_number) (load5 * 1000));
  53             rrddim_set(load_chart, "load15", (collected_number) (load15 * 1000));
  54             rrdset_done(load_chart);
  55         }
  56
  57         last_loadavg_usec = load_chart->update_every * 1000000ULL;
  58     }
  59     else last_loadavg_usec -= dt;
  60
  61     // --------------------------------------------------------------------
  62
  63     if(likely(do_all_processes)) {
  64         if(unlikely(!processes_chart)) {
  65             processes_chart = rrdset_find_byname("system.active_processes");
  66             if(unlikely(!processes_chart)) {
  67                 processes_chart = rrdset_create("system", "active_processes", NULL, "processes", NULL, "System Active Processes", "processes", 750, update_every, RRDSET_TYPE_LINE);
  68                 rrddim_add(processes_chart, "active", NULL, 1, 1, RRDDIM_ABSOLUTE);
  69             }
  70         }
  71         else rrdset_next(processes_chart);
  72
  73         rrddim_set(processes_chart, "active", active_processes);
  74         rrdset_done(processes_chart);
  75     }
  76
  77     return 0;
  78 }