[root@sh_02 ~]# fio -filename=/dev/vda1 -direct=1 -iodepth 1 -thread -rw=randread -ioengine=psync -bs=16k -size=2G -numjobs=10 -runtime=300 -group_reporting -name=mytest
mytest: (g=0): rw=randread, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=1
...
fio-3.1
Starting 10 threads
Jobs: 6 (f=6): [r(1),_(2),r(3),_(2),r(2)][100.0%][r=2197MiB/s,w=0KiB/s][r=141k,w=0 IOPS][eta 00m:00s]
mytest: (groupid=0, jobs=10): err= 0: pid=15256: Tue Jul 24 11:22:45 2018
read: IOPS=119k, BW=1854MiB/s (1944MB/s)(20.0GiB/11049msec)
clat (usec): min=14, max=73003, avg=81.48, stdev=236.43
lat (usec): min=14, max=73003, avg=81.88, stdev=236.45
clat percentiles (usec):
| 1.00th=[ 25], 5.00th=[ 40], 10.00th=[ 47], 20.00th=[ 53],
| 30.00th=[ 58], 40.00th=[ 61], 50.00th=[ 64], 60.00th=[ 67],
| 70.00th=[ 71], 80.00th=[ 77], 90.00th=[ 92], 95.00th=[ 119],
| 99.00th=[ 515], 99.50th=[ 873], 99.90th=[ 2212], 99.95th=[ 3326],
| 99.99th=[ 6521]
bw ( KiB/s): min=27831, max=244672, per=10.03%, avg=190396.69, stdev=64486.41, samples=213
iops : min= 1739, max=15292, avg=11899.65, stdev=4030.47, samples=213
lat (usec) : 20=0.36%, 50=14.61%, 100=77.75%, 250=5.21%, 500=1.04%
lat (usec) : 750=0.39%, 1000=0.24%
lat (msec) : 2=0.28%, 4=0.09%, 10=0.03%, 20=0.01%, 50=0.01%
lat (msec) : 100=0.01%
cpu : usr=1.90%, sys=7.43%, ctx=1310606, majf=0, minf=47
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=1310720,0,0, short=0,0,0, dropped=0,0,0
latency : target=0, window=0, percentile=100.00%, depth=1
Run status group 0 (all jobs):
READ: bw=1854MiB/s (1944MB/s), 1854MiB/s-1854MiB/s (1944MB/s-1944MB/s), io=20.0GiB (21.5GB), run=11049-11049msec
Disk stats (read/write):
vda: ios=1299933/5, merge=0/0, ticks=83015/4, in_queue=82966, util=97.92%
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