memcpy(&td->start, &td->epoch, sizeof(struct timeval));
memcpy(&td->iops_sample_time, &td->epoch, sizeof(struct timeval));
memcpy(&td->bw_sample_time, &td->epoch, sizeof(struct timeval));
+ memcpy(&td->ss.prev_time, &td->epoch, sizeof(struct timeval));
lat_target_reset(td);
clear_rusage_stat(td);