src/plugin_checks.c

   1 #include "common.h"
   2
   3 void *checks_main(void *ptr) {
   4     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
   5
   6     info("CHECKS thread created with task id %d", gettid());
   7
   8     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
   9         error("Cannot set pthread cancel type to DEFERRED.");
  10
  11     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
  12         error("Cannot set pthread cancel state to ENABLE.");
  13
  14     usec_t usec = 0, susec = rrd_update_every * USEC_PER_SEC, loop_usec = 0, total_susec = 0;
  15     struct timeval now, last, loop;
  16
  17     RRDSET *check1, *check2, *check3, *apps_cpu = NULL;
  18
  19     check1 = rrdset_create("netdata", "check1", NULL, "netdata", NULL, "Caller gives microseconds", "a million !", 99999, rrd_update_every, RRDSET_TYPE_LINE);
  20     rrddim_add(check1, "absolute", NULL, -1, 1, RRD_ALGORITHM_ABSOLUTE);
  21     rrddim_add(check1, "incremental", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
  22
  23     check2 = rrdset_create("netdata", "check2", NULL, "netdata", NULL, "Netdata calcs microseconds", "a million !", 99999, rrd_update_every, RRDSET_TYPE_LINE);
  24     rrddim_add(check2, "absolute", NULL, -1, 1, RRD_ALGORITHM_ABSOLUTE);
  25     rrddim_add(check2, "incremental", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
  26
  27     check3 = rrdset_create("netdata", "checkdt", NULL, "netdata", NULL, "Clock difference", "microseconds diff", 99999, rrd_update_every, RRDSET_TYPE_LINE);
  28     rrddim_add(check3, "caller", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
  29     rrddim_add(check3, "netdata", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
  30     rrddim_add(check3, "apps.plugin", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
  31
  32     now_realtime_timeval(&last);
  33     while(1) {
  34         usleep(susec);
  35
  36         // find the time to sleep in order to wait exactly update_every seconds
  37         now_realtime_timeval(&now);
  38         loop_usec = dt_usec(&now, &last);
  39         usec = loop_usec - susec;
  40         debug(D_PROCNETDEV_LOOP, "CHECK: last loop took %llu usec (worked for %llu, sleeped for %llu).", loop_usec, usec, susec);
  41
  42         if(usec < (rrd_update_every * USEC_PER_SEC / 2ULL)) susec = (rrd_update_every * USEC_PER_SEC) - usec;
  43         else susec = rrd_update_every * USEC_PER_SEC / 2ULL;
  44
  45         // --------------------------------------------------------------------
  46         // Calculate loop time
  47
  48         last.tv_sec = now.tv_sec;
  49         last.tv_usec = now.tv_usec;
  50         total_susec += loop_usec;
  51
  52         // --------------------------------------------------------------------
  53         // check chart 1
  54
  55         if(check1->counter_done) rrdset_next_usec(check1, loop_usec);
  56         rrddim_set(check1, "absolute", 1000000);
  57         rrddim_set(check1, "incremental", total_susec);
  58         rrdset_done(check1);
  59
  60         // --------------------------------------------------------------------
  61         // check chart 2
  62
  63         if(check2->counter_done) rrdset_next(check2);
  64         rrddim_set(check2, "absolute", 1000000);
  65         rrddim_set(check2, "incremental", total_susec);
  66         rrdset_done(check2);
  67
  68         // --------------------------------------------------------------------
  69         // check chart 3
  70
  71         if(!apps_cpu) apps_cpu = rrdset_find_localhost("apps.cpu");
  72         if(check3->counter_done) rrdset_next_usec(check3, loop_usec);
  73         now_realtime_timeval(&loop);
  74         rrddim_set(check3, "caller", (long long) dt_usec(&loop, &check1->last_collected_time));
  75         rrddim_set(check3, "netdata", (long long) dt_usec(&loop, &check2->last_collected_time));
  76         if(apps_cpu) rrddim_set(check3, "apps.plugin", (long long) dt_usec(&loop, &apps_cpu->last_collected_time));
  77         rrdset_done(check3);
  78     }
  79
  80     info("CHECKS thread exiting");
  81
  82     static_thread->enabled = 0;
  83     pthread_exit(NULL);
  84     return NULL;
  85 }
  86