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=8168
  read : io=4,096MiB, bw=235MiB/s, iops=15,045, runt= 17423msec
    clat (usec): min=11, max=981, avg=14.13, stdev= 3.10
    bw (KiB/s) : min=    0, max=247168, per=97.09%, avg=233728.91, stdev=41285.96
  write: io=4,096MiB, bw=20,067KiB/s, iops=1,254, runt=209011msec
    clat (usec): min=14, max=896K, avg=586.00, stdev=10595.86
    bw (KiB/s) : min=    0, max=78850, per=107.61%, avg=21594.64, stdev=19086.52
  cpu          : usr=31.53%, sys=4.51%, ctx=68218, 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=50.14%, 50=45.51%, 100=1.10%, 250=0.97%, 500=0.99%
     lat (usec): 750=0.20%, 1000=0.25%
     lat (msec): 2=0.29%, 4=0.06%, 10=0.14%, 20=0.11%, 50=0.08%
     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=8271
  read : io=4,040MiB, bw=154MiB/s, iops=9,866, runt= 26202msec
    clat (usec): min=2, max=119, avg=15.31, stdev= 3.71
    bw (KiB/s) : min=    0, max=246528, per=99.17%, avg=156562.19, stdev=44785.39
  write: io=1,024MiB, bw=47,716KiB/s, iops=2,982, runt= 21975msec
    clat (usec): min=2, max=850K, avg=32.95, stdev=3321.11
    bw (KiB/s) : min=    0, max=52608, per=99.49%, avg=47475.61, stdev=10354.44
  cpu          : usr=6.64%, sys=0.96%, ctx=11229, majf=0, minf=1114919
  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=258533/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.47%, 20=77.90%, 50=16.61%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17423msec, maxt=17423msec
  WRITE: io=4,096MiB, aggrb=20,067KiB/s, minb=20,067KiB/s, maxb=20,067KiB/s, mint=209011msec, maxt=209011msec

Run status group 1 (all jobs):
   READ: io=4,040MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26202msec, maxt=26202msec
  WRITE: io=1,024MiB, aggrb=47,717KiB/s, minb=47,717KiB/s, maxb=47,717KiB/s, mint=21975msec, maxt=21975msec

Disk stats (read/write):
  sda: ios=16593/66949, merge=848/1229938, ticks=225145/120980604, in_queue=121205695, util=93.22%
100.28user 50.94system 11:34.48elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390760inputs+18765112outputs (9major+3221173minor)pagefaults 0swaps