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 = usecdiff(&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)usecdiff(&loop, &check1->last_collected_time));
  76                 rrddim_set(check3, "netdata", (long long)usecdiff(&loop, &check2->last_collected_time));
  77                 if(apps_cpu) rrddim_set(check3, "apps.plugin", (long long)usecdiff(&loop, &apps_cpu->last_collected_time));
  78                 rrdset_done(check3);
  79         }
  80
  81         pthread_exit(NULL);
  82         return NULL;
  83 }
  84