1 files changed, 68 insertions, 0 deletions
diff --git a/src/plugin_idlejitter.c b/src/plugin_idlejitter.c
new file mode 100755
index 000000000..56c22a160
--- /dev/null
+++ b/src/plugin_idlejitter.c
@@ -0,0 +1,68 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <pthread.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <strings.h>
+#include <unistd.h>
+
+#include "global_statistics.h"
+#include "common.h"
+#include "appconfig.h"
+#include "log.h"
+#include "rrd.h"
+#include "plugin_idlejitter.h"
+
+#define CPU_IDLEJITTER_SLEEP_TIME_MS 20
+
+void *cpuidlejitter_main(void *ptr)
+{
+	if(ptr) { ; }
+
+	info("CPU Idle Jitter 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("system.idlejitter");
+	if(!st) {
+		st = rrdset_create("system", "idlejitter", NULL, "processes", NULL, "CPU Idle Jitter", "microseconds lost/s", 9999, rrd_update_every, RRDSET_TYPE_LINE);
+		rrddim_add(st, "jitter", NULL, 1, 1, RRDDIM_ABSOLUTE);
+	}
+
+	struct timeval before, after;
+	unsigned long long counter;
+	for(counter = 0; 1 ;counter++) {
+		unsigned long long usec = 0, susec = 0;
+
+		while(susec < (rrd_update_every * 1000000ULL)) {
+
+			gettimeofday(&before, NULL);
+			usleep(sleep_ms * 1000);
+			gettimeofday(&after, NULL);
+
+			// calculate the time it took for a full loop
+			usec = usecdiff(&after, &before);
+			susec += usec;
+		}
+		usec -= (sleep_ms * 1000);
+
+		if(counter) rrdset_next(st);
+		rrddim_set(st, "jitter", usec);
+		rrdset_done(st);
+	}
+
+	pthread_exit(NULL);
+	return NULL;
+}
+