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=20552
  read : io=4,096MiB, bw=236MiB/s, iops=15,134, runt= 17321msec
    clat (usec): min=10, max=297, avg=13.92, stdev= 2.15
    bw (KiB/s) : min=    0, max=250816, per=97.08%, avg=235100.34, stdev=41176.50
  write: io=4,096MiB, bw=21,507KiB/s, iops=1,344, runt=195015msec
    clat (usec): min=13, max=940K, avg=646.84, stdev=10626.98
    bw (KiB/s) : min=    0, max=89152, per=107.38%, avg=23094.57, stdev=19752.11
  cpu          : usr=19.27%, sys=2.50%, ctx=104345, 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=94.94%, 50=1.74%, 100=0.14%, 250=0.20%, 500=0.09%
     lat (usec): 750=0.13%, 1000=0.15%
     lat (msec): 2=1.02%, 4=1.01%, 10=0.15%, 20=0.16%, 50=0.09%
     lat (msec): 100=0.12%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20638
  read : io=4,038MiB, bw=158MiB/s, iops=10,137, runt= 25491msec
    clat (usec): min=2, max=111, avg=12.80, stdev= 3.01
    bw (KiB/s) : min=    0, max=249440, per=100.37%, avg=162810.04, stdev=45849.49
  write: io=1,024MiB, bw=48,814KiB/s, iops=3,050, runt= 21481msec
    clat (usec): min=2, max=984K, avg=32.26, stdev=3845.00
    bw (KiB/s) : min=    0, max=53312, per=100.25%, avg=48939.48, stdev=10094.23
  cpu          : usr=6.42%, sys=0.65%, ctx=890, majf=0, minf=1114832
  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=258412/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.99%, 20=83.07%, 50=3.92%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17321msec, maxt=17321msec
  WRITE: io=4,096MiB, aggrb=21,507KiB/s, minb=21,507KiB/s, maxb=21,507KiB/s, mint=195015msec, maxt=195015msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25491msec, maxt=25491msec
  WRITE: io=1,024MiB, aggrb=48,815KiB/s, minb=48,815KiB/s, maxb=48,815KiB/s, mint=21481msec, maxt=21481msec

Disk stats (read/write):
  sda: ios=16647/65431, merge=793/1230953, ticks=248642/123156014, in_queue=123404592, util=93.29%
66.81user 31.29system 11:19.23elapsed 14%CPU (0avgtext+0avgdata 16861648maxresident)k
8390984inputs+18761168outputs (9major+3221029minor)pagefaults 0swaps