if (write_bw_log && rate_time > bw_avg_time && !in_ramp_time(td)) {
calc_rate(rate_time, io_bytes, rate_io_bytes, rate);
memcpy(&rate_prev_time, &now, sizeof(now));
if (write_bw_log && rate_time > bw_avg_time && !in_ramp_time(td)) {
calc_rate(rate_time, io_bytes, rate_io_bytes, rate);
memcpy(&rate_prev_time, &now, sizeof(now));