96 	uint64_t nsec;  in measure_call()  local
106 	nsec = (end.tv_sec - start.tv_sec) * NSEC_PER_SEC;  in measure_call()
108 		nsec += end.tv_nsec - start.tv_nsec;  in measure_call()
110 		nsec -= start.tv_nsec - end.tv_nsec;  in measure_call()
113 		st->min = st->max = nsec;  in measure_call()
115 		if (st->min > nsec)  in measure_call()
116 			st->min = nsec;  in measure_call()
117 		if (st->max < nsec)  in measure_call()
118 			st->max = nsec;  in measure_call()
123 	delta = (double)nsec - st->mean;  in measure_call()
125 	st->s2 += delta * ((double)nsec - st->mean);  in measure_call()