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#include "common.h"
#define CPU_IDLEJITTER_SLEEP_TIME_MS 20
void *cpuidlejitter_main(void *ptr) {
struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
info("IDLEJITTER thread created with task id %d", gettid());
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
error("Cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
error("Cannot set pthread cancel state to ENABLE.");
int sleep_ms = (int) config_get_number("plugin:idlejitter", "loop time in ms", CPU_IDLEJITTER_SLEEP_TIME_MS);
if(sleep_ms <= 0) {
config_set_number("plugin:idlejitter", "loop time in ms", CPU_IDLEJITTER_SLEEP_TIME_MS);
sleep_ms = CPU_IDLEJITTER_SLEEP_TIME_MS;
}
RRDSET *st = rrdset_find_localhost("system.idlejitter");
if(!st) {
st = rrdset_create_localhost("system", "idlejitter", NULL, "processes", NULL, "CPU Idle Jitter"
, "microseconds lost/s", 9999, localhost->rrd_update_every, RRDSET_TYPE_LINE);
rrddim_add(st, "jitter", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
}
struct timeval before, after;
unsigned long long counter;
for(counter = 0; 1 ;counter++) {
usec_t usec = 0, susec = 0;
if(netdata_exit) break;
while(susec < (localhost->rrd_update_every * USEC_PER_SEC)) {
now_monotonic_timeval(&before);
sleep_usec(sleep_ms * 1000);
now_monotonic_timeval(&after);
// calculate the time it took for a full loop
usec = dt_usec(&after, &before);
susec += usec;
}
usec -= (sleep_ms * 1000);
if(counter) rrdset_next(st);
rrddim_set(st, "jitter", usec);
rrdset_done(st);
}
info("IDLEJITTER thread exiting");
static_thread->enabled = 0;
pthread_exit(NULL);
return NULL;
}
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