# fio --filename=/dev/sdc1 --direct=1 --rw=randrw --bs=16k --size=50G --numjobs=16 --runtime=120 --group_reporting --name=test --rwmixread=90 --thread --ioengine=psync
test: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
...
test: (g=0): rw=randrw, bs=16K-16K/16K-16K, ioengine=psync, iodepth=1
fio 1.58
Starting 16 threads
Jobs: 16 (f=16): [mmmmmmmmmmmmmmmm] [100.0% done] [186.4M/21528K /s] [11.7K/1314  iops] [eta 00m:00s]
test: (groupid=0, jobs=16): err= 0: pid=5890
  read : io=21745MB, bw=185555KB/s, iops=11597 , runt=120002msec
    clat (usec): min=50 , max=102470 , avg=1366.48, stdev=916.26
     lat (usec): min=50 , max=102470 , avg=1366.65, stdev=916.26
    bw (KB/s) : min= 9120, max=13280, per=6.26%, avg=11607.58, stdev=327.01
  write: io=2420.2MB, bw=20659KB/s, iops=1291 , runt=120002msec
    clat (usec): min=46 , max=20822 , avg=95.01, stdev=214.36
     lat (usec): min=46 , max=20822 , avg=95.20, stdev=214.36
    bw (KB/s) : min=  575, max= 2352, per=6.26%, avg=1292.69, stdev=212.38
  cpu          : usr=5.27%, sys=18.02%, ctx=24973555, majf=0, minf=7948
  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 r/w/d: total=1391689/154943/0, short=0/0/0
     lat (usec): 50=0.01%, 100=8.15%, 250=1.90%, 500=0.03%, 750=0.04%
     lat (usec): 1000=4.53%
     lat (msec): 2=81.17%, 4=0.36%, 10=3.79%, 20=0.01%, 50=0.01%
     lat (msec): 100=0.01%, 250=0.01%

Run status group 0 (all jobs):
   READ: io=21745MB, aggrb=185555KB/s, minb=190008KB/s, maxb=190008KB/s, mint=120002msec, maxt=120002msec
  WRITE: io=2420.2MB, aggrb=20658KB/s, minb=21154KB/s, maxb=21154KB/s, mint=120002msec, maxt=120002msec

Disk stats (read/write):
  sdc: ios=1391596/154925, merge=153/0, ticks=1888704/13116, in_queue=1901364, util=100.00%