root@testing:~# fio random-read.fio
random-read: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=32
...
random-read: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=libaio, iodepth=32
fio 1.59
Starting 8 processes
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
random-read: Laying out IO file(s) (1 file(s) / 500MB)
Jobs: 8 (f=8): [rrrrrrrr] [100.0% done] [99.97M/0K /s] [24.1K/0  iops] [eta 00m:00s]
random-read: (groupid=0, jobs=8): err= 0: pid=1422
  read : io=3976.1MB, bw=101340KB/s, iops=25334 , runt= 40185msec
    slat (usec): min=176 , max=954228 , avg=312.38, stdev=948.20
    clat (usec): min=4 , max=963145 , avg=9763.16, stdev=1959.32
     lat (usec): min=266 , max=963458 , avg=10076.14, stdev=2177.76
    bw (KB/s) : min=    4, max=13824, per=12.52%, avg=12688.03, stdev=543.73
  cpu          : usr=1.15%, sys=7.15%, ctx=1047544, majf=0, minf=15153
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=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=0.1%, 64=0.0%, >=64=0.0%
     issued r/w/d: total=1018086/0/0, short=0/0/0
     lat (usec): 10=0.01%, 20=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 4=0.01%, 10=71.21%, 20=28.78%, 1000=0.01%

Run status group 0 (all jobs):
   READ: io=3976.1MB, aggrb=101339KB/s, minb=103772KB/s, maxb=103772KB/s, mint=40185msec, maxt=40185msec
root@testing:~# cat random-read.fio
[random-read]
rw=randread
direct=1
invalidate=1
fsync=100

ioengine=libaio
iodepth=32

directory=/testdir
size=500M
numjobs=8
group_reporting
exitall