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=16282
  read : io=4,096MiB, bw=235MiB/s, iops=15,032, runt= 17439msec
    clat (usec): min=11, max=110, avg=14.43, stdev= 1.99
    bw (KiB/s) : min=    0, max=248160, per=97.20%, avg=233781.94, stdev=41111.73
  write: io=4,096MiB, bw=18,979KiB/s, iops=1,186, runt=220995msec
    clat (usec): min=14, max=374K, avg=746.31, stdev=7052.95
    bw (KiB/s) : min=    0, max=64608, per=102.12%, avg=19381.37, stdev=16811.06
  cpu          : usr=18.32%, sys=2.42%, ctx=19557, majf=0, minf=2102318
  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=66.90%, 50=29.68%, 100=0.02%, 250=0.11%, 500=0.02%
     lat (usec): 750=0.08%, 1000=0.04%
     lat (msec): 2=0.79%, 4=1.53%, 10=0.29%, 20=0.16%, 50=0.16%
     lat (msec): 100=0.18%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=16497
  read : io=4,039MiB, bw=38,772KiB/s, iops=2,423, runt=106663msec
    clat (usec): min=2, max=985, avg=16.66, stdev= 5.07
    bw (KiB/s) : min=    0, max=235584, per=220.49%, avg=85487.89, stdev=79473.49
  write: io=1,024MiB, bw=10,023KiB/s, iops=626, runt=104616msec
    clat (usec): min=3, max=3,274K, avg=1284.62, stdev=53066.34
    bw (KiB/s) : min=    0, max=50176, per=229.04%, avg=22956.52, stdev=22317.08
  cpu          : usr=7.61%, sys=1.40%, ctx=1602, majf=0, minf=1122292
  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=258475/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.16%, 20=50.97%, 50=35.80%, 100=0.04%
     lat (usec): 250=0.01%, 1000=0.01%
     lat (msec): 750=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17439msec, maxt=17439msec
  WRITE: io=4,096MiB, aggrb=18,979KiB/s, minb=18,979KiB/s, maxb=18,979KiB/s, mint=220995msec, maxt=220995msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=38,772KiB/s, minb=38,772KiB/s, maxb=38,772KiB/s, mint=106663msec, maxt=106663msec
  WRITE: io=1,024MiB, aggrb=10,023KiB/s, minb=10,023KiB/s, maxb=10,023KiB/s, mint=104616msec, maxt=104616msec

Disk stats (read/write):
  sda: ios=18420/62943, merge=14376/1235999, ticks=250975/50886263, in_queue=51137229, util=93.83%
67.53user 33.80system 10:47.88elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390640inputs+18823344outputs (32major+3228325minor)pagefaults 0swaps