[fio.git] / examples / latency-profile.fio

# 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
Commit	Line	Data
3e260a46 JA	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