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=20075
  read : io=4,096MiB, bw=219MiB/s, iops=14,022, runt= 18695msec
    clat (usec): min=15, max=108, avg=19.09, stdev= 2.36
    bw (KiB/s) : min=    0, max=233344, per=97.40%, avg=218526.32, stdev=36874.33
  write: io=4,096MiB, bw=20,166KiB/s, iops=1,260, runt=207984msec
    clat (usec): min=17, max=507K, avg=561.96, stdev=6592.42
    bw (KiB/s) : min=    0, max=77920, per=101.26%, avg=20421.02, stdev=14117.19
  cpu          : usr=31.08%, sys=5.78%, ctx=116451, majf=1, minf=2102341
  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=19.65%, 50=74.36%, 100=2.61%, 250=1.69%, 500=0.29%
     lat (usec): 750=0.13%, 1000=0.14%
     lat (msec): 2=0.18%, 4=0.13%, 10=0.26%, 20=0.23%, 50=0.17%
     lat (msec): 100=0.10%, 250=0.05%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20169
  read : io=4,040MiB, bw=149MiB/s, iops=9,523, runt= 27148msec
    clat (usec): min=2, max=2,225, avg=20.05, stdev= 8.74
    bw (KiB/s) : min=    0, max=235744, per=97.50%, avg=148565.93, stdev=39918.10
  write: io=1,024MiB, bw=45,970KiB/s, iops=2,873, runt= 22810msec
    clat (usec): min=6, max=1,114, avg=26.22, stdev= 8.61
    bw (KiB/s) : min=    0, max=50848, per=97.78%, avg=44949.11, stdev=7658.15
  cpu          : usr=6.30%, sys=1.35%, ctx=1163, majf=0, minf=1115409
  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=258546/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.77%, 20=34.79%, 50=58.35%, 100=0.06%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%, 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=219MiB/s, minb=219MiB/s, maxb=219MiB/s, mint=18695msec, maxt=18695msec
  WRITE: io=4,096MiB, aggrb=20,166KiB/s, minb=20,166KiB/s, maxb=20,166KiB/s, mint=207984msec, maxt=207984msec

Run status group 1 (all jobs):
   READ: io=4,040MiB, aggrb=149MiB/s, minb=149MiB/s, maxb=149MiB/s, mint=27148msec, maxt=27148msec
  WRITE: io=1,024MiB, aggrb=45,970KiB/s, minb=45,970KiB/s, maxb=45,970KiB/s, mint=22810msec, maxt=22810msec

Disk stats (read/write):
  sda: ios=16637/75798, merge=804/1221049, ticks=255810/133893373, in_queue=134149045, util=93.20%
106.16user 51.35system 13:03.29elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390776inputs+18765176outputs (9major+3221868minor)pagefaults 0swaps