stresser: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=1
fio: mixed read/write workload with verify. May not work as expected, unless you pre-populated the file
stresser: (g=1): rw=randrw, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=4
Starting 2 processes
stresser: Laying out IO file(s) (1 file(s) / 4096MiB)

stresser: (groupid=0, jobs=1): err= 0: pid=17595
  read : io=4,096MiB, bw=214MiB/s, iops=13,672, runt= 19173msec
    clat (usec): min=12, max=3,197, avg=17.28, stdev=11.49
    bw (KiB/s) : min=    0, max=243776, per=97.41%, avg=213103.59, stdev=49896.71
  write: io=4,096MiB, bw=18,547KiB/s, iops=1,159, runt=226136msec
    clat (usec): min=15, max=452K, avg=652.82, stdev=7123.43
    bw (KiB/s) : min=    0, max=65664, per=102.04%, avg=18925.40, stdev=16804.58
  cpu          : usr=30.43%, sys=5.06%, ctx=17410, majf=0, minf=2102311
  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: total=262144/262144, short=0/0
     lat (usec): 20=47.98%, 50=45.62%, 100=3.01%, 250=0.20%, 500=1.22%
     lat (usec): 750=0.09%, 1000=0.15%
     lat (msec): 2=0.85%, 4=0.23%, 10=0.16%, 20=0.11%, 50=0.15%
     lat (msec): 100=0.16%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17849
  read : io=4,038MiB, bw=35,209KiB/s, iops=2,200, runt=117447msec
    clat (usec): min=2, max=3,080, avg=22.36, stdev=12.62
    bw (KiB/s) : min=    0, max=230400, per=229.07%, avg=80656.47, stdev=74160.68
  write: io=1,024MiB, bw=9,297KiB/s, iops=581, runt=112785msec
    clat (usec): min=4, max=3,054K, avg=1280.69, stdev=52976.04
    bw (KiB/s) : min=    0, max=49472, per=235.08%, avg=21855.63, stdev=20765.40
  cpu          : usr=9.96%, sys=2.34%, ctx=19325, majf=0, minf=1129309
  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: total=258456/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.88%, 20=37.67%, 50=52.94%, 100=4.46%
     lat (usec): 250=0.03%, 500=0.01%, 750=0.01%
     lat (msec): 4=0.01%, 250=0.01%, 500=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=214MiB/s, minb=214MiB/s, maxb=214MiB/s, mint=19173msec, maxt=19173msec
  WRITE: io=4,096MiB, aggrb=18,547KiB/s, minb=18,547KiB/s, maxb=18,547KiB/s, mint=226136msec, maxt=226136msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=35,210KiB/s, minb=35,210KiB/s, maxb=35,210KiB/s, mint=117447msec, maxt=117447msec
  WRITE: io=1,024MiB, aggrb=9,297KiB/s, minb=9,297KiB/s, maxb=9,297KiB/s, mint=112785msec, maxt=112785msec

Disk stats (read/write):
  sda: ios=18412/62387, merge=14385/1236020, ticks=246707/53639034, in_queue=53885691, util=93.04%
107.36user 65.72system 11:07.65elapsed 25%CPU (0avgtext+0avgdata 0maxresident)k
8390680inputs+18878936outputs (32major+3235407minor)pagefaults 0swaps