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=9631
  read : io=4,096MiB, bw=228MiB/s, iops=14,607, runt= 17946msec
    clat (usec): min=11, max=518, avg=16.34, stdev= 2.26
    bw (KiB/s) : min=    0, max=247168, per=97.11%, avg=226960.89, stdev=39170.34
  write: io=4,096MiB, bw=20,588KiB/s, iops=1,286, runt=203717msec
    clat (usec): min=14, max=710K, avg=573.60, stdev=9590.45
    bw (KiB/s) : min=    0, max=80672, per=105.52%, avg=21723.52, stdev=20921.30
  cpu          : usr=31.98%, sys=4.26%, ctx=63621, majf=1, minf=2102310
  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=51.11%, 50=45.11%, 100=0.52%, 250=1.49%, 500=0.32%
     lat (usec): 750=0.24%, 1000=0.31%
     lat (msec): 2=0.37%, 4=0.08%, 10=0.13%, 20=0.10%, 50=0.07%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=9890
  read : io=4,037MiB, bw=159MiB/s, iops=10,185, runt= 25367msec
    clat (usec): min=2, max=141, avg=15.32, stdev= 3.57
    bw (KiB/s) : min=    0, max=247584, per=98.05%, avg=159789.80, stdev=42912.37
  write: io=1,024MiB, bw=49,106KiB/s, iops=3,069, runt= 21353msec
    clat (usec): min=2, max=105, avg=20.48, stdev= 3.59
    bw (KiB/s) : min=    0, max=51360, per=97.55%, avg=47903.86, stdev=7916.41
  cpu          : usr=7.55%, sys=1.19%, ctx=33318, majf=0, minf=1113781
  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=258363/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.13%, 20=77.73%, 50=20.12%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=228MiB/s, minb=228MiB/s, maxb=228MiB/s, mint=17946msec, maxt=17946msec
  WRITE: io=4,096MiB, aggrb=20,588KiB/s, minb=20,588KiB/s, maxb=20,588KiB/s, mint=203717msec, maxt=203717msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25367msec, maxt=25367msec
  WRITE: io=1,024MiB, aggrb=49,107KiB/s, minb=49,107KiB/s, maxb=49,107KiB/s, mint=21353msec, maxt=21353msec

Disk stats (read/write):
  sda: ios=16690/76646, merge=750/1219520, ticks=232277/104683512, in_queue=104915683, util=92.35%
98.55user 49.13system 11:25.38elapsed 21%CPU (0avgtext+0avgdata 16861296maxresident)k
8390784inputs+18759376outputs (9major+3219847minor)pagefaults 0swaps