timevaldiff
printf("%6.1f ", max_seconds - timevaldiff(timeout, start)/1000000.0f);
printf("%6.2f ", timevaldiff(now, start) / cnt);
printf("%6.2f ", timevaldiff(now, start) / cnt);
printf("%6.2f ", timevaldiff(now, start) / cnt);
printf("%6.2f ", timevaldiff(now, start) / cnt);
printf("%.2fs\n", timevaldiff(now, start)/1000000l);