File: latency-profile.fio

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fio 2.1.11-2
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# Test job that demonstrates how to use the latency target
# profiling. Fio will find the queue depth between 1..128
# that fits within the latency constraints of this 4k random
# read workload.

[global]
bs=4k
rw=randread
random_generator=lfsr
direct=1
ioengine=libaio
iodepth=128
# Set max acceptable latency to 500msec
latency_target=500000
# profile over a 5s window
latency_window=5000000
# 99.9% of IOs must be below the target
latency_percentile=99.9

[device]
filename=/dev/sda