Jens Axboe | 3e260a4 | 2013-12-09 12:38:53 -0700 | [diff] [blame] | 1 | # Test job that demonstrates how to use the latency target |
| 2 | # profiling. Fio will find the queue depth between 1..128 |
| 3 | # that fits within the latency constraints of this 4k random |
| 4 | # read workload. |
| 5 | |
| 6 | [global] |
| 7 | bs=4k |
| 8 | rw=randread |
| 9 | random_generator=lfsr |
| 10 | direct=1 |
| 11 | ioengine=libaio |
| 12 | iodepth=128 |
| 13 | # Set max acceptable latency to 500msec |
| 14 | latency_target=500000 |
| 15 | # profile over a 5s window |
| 16 | latency_window=5000000 |
| 17 | # 99.9% of IOs must be below the target |
| 18 | latency_percentile=99.9 |
| 19 | |
| 20 | [device] |
| 21 | filename=/dev/sda |