src/plugin_checks.c

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