# fio -ioengine=libaio -size=10G -direct=1 -name=test -bs=4k -iodepth=1 -rw=randwrite -runtime=60 -filename=./testfile
test: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.1
Starting 1 process
test: Laying out IO file (1 file / 10240MiB)
fio: native_fallocate call failed: Operation not supported
Jobs: 1 (f=1): [w(1)][100.0%][r=0KiB/s,w=1841KiB/s][r=0,w=460 IOPS][eta 00m:00s]
test: (groupid=0, jobs=1): err= 0: pid=8129: Fri Jul 3 19:17:50 2020
write: IOPS=462, BW=1849KiB/s (1893kB/s)(108MiB/60001msec)
slat (usec): min=9, max=1644, avg=52.75, stdev=27.15
clat (usec): min=858, max=137841, avg=2103.29, stdev=4076.17
lat (usec): min=902, max=137933, avg=2156.92, stdev=4076.11
clat percentiles (usec):
| 1.00th=[ 979], 5.00th=[ 1057], 10.00th=[ 1106], 20.00th=[ 1156],
| 30.00th=[ 1205], 40.00th=[ 1237], 50.00th=[ 1254], 60.00th=[ 1303],
| 70.00th=[ 1352], 80.00th=[ 1467], 90.00th=[ 1860], 95.00th=[ 7504],
| 99.00th=[18744], 99.50th=[25822], 99.90th=[54789], 99.95th=[62653],
| 99.99th=[87557]
bw ( KiB/s): min= 560, max= 2384, per=100.00%, avg=1848.67, stdev=365.07, samples=120
iops : min= 140, max= 596, avg=462.15, stdev=91.27, samples=120
lat (usec) : 1000=1.72%
lat (msec) : 2=89.23%, 4=2.47%, 10=3.19%, 20=2.50%, 50=0.74%
lat (msec) : 100=0.14%, 250=0.01%
cpu : usr=0.65%, sys=2.79%, ctx=36332, majf=0, minf=9
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwt: total=0,27733,0, short=0,0,0, dropped=0,0,0
latency : target=0, window=0, percentile=100.00%, depth=1
Run status group 0 (all jobs):
WRITE: bw=1849KiB/s (1893kB/s), 1849KiB/s-1849KiB/s (1893kB/s-1893kB/s), io=108MiB (114MB), run=60001-60001msec