# 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: 13 (f=13): [EmEmEmmmmmmmmmmm] [2.7% done] [180.8M/20512K /s] [11.3K/1252  iops] [eta 01h:12m:02s]
test: (groupid=0, jobs=16): err= 0: pid=3766
  read : io=20081MB, bw=171356KB/s, iops=10709 , runt=120004msec
    clat (usec): min=69 , max=209980 , avg=1463.25, stdev=1599.18
     lat (usec): min=70 , max=209981 , avg=1464.25, stdev=1599.17
    bw (KB/s) : min= 3968, max=13248, per=6.26%, avg=10720.52, stdev=1743.17
  write: io=2233.2MB, bw=19055KB/s, iops=1190 , runt=120004msec
    clat (usec): min=57 , max=49175 , avg=218.08, stdev=401.84
     lat (usec): min=58 , max=49176 , avg=219.09, stdev=401.91
    bw (KB/s) : min=  314, max= 2167, per=6.26%, avg=1193.72, stdev=274.97
  cpu          : usr=8.38%, sys=25.69%, ctx=23062260, majf=0, minf=8454
  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=1285211/142921/0, short=0/0/0
     lat (usec): 100=0.68%, 250=6.98%, 500=2.21%, 750=0.18%, 1000=4.75%
     lat (msec): 2=76.34%, 4=5.25%, 10=3.56%, 20=0.02%, 50=0.01%
     lat (msec): 100=0.01%, 250=0.01%

Run status group 0 (all jobs):
   READ: io=20081MB, aggrb=171355KB/s, minb=175468KB/s, maxb=175468KB/s, mint=120004msec, maxt=120004msec
  WRITE: io=2233.2MB, aggrb=19055KB/s, minb=19512KB/s, maxb=19512KB/s, mint=120004msec, maxt=120004msec

Disk stats (read/write):
  sdc: ios=1285201/142921, merge=0/0, ticks=1832744/21800, in_queue=1853836, util=100.00%