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=16517
  read : io=4,096MiB, bw=236MiB/s, iops=15,127, runt= 17329msec
    clat (usec): min=10, max=124, avg=13.91, stdev= 1.59
    bw (KiB/s) : min=    0, max=252320, per=97.07%, avg=234965.94, stdev=41034.59
  write: io=4,096MiB, bw=21,961KiB/s, iops=1,372, runt=190983msec
    clat (usec): min=14, max=918K, avg=631.94, stdev=10100.52
    bw (KiB/s) : min=    0, max=88576, per=106.17%, avg=23317.08, stdev=20069.84
  cpu          : usr=19.39%, sys=2.64%, ctx=29716, 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=90.53%, 50=6.15%, 100=0.10%, 250=0.24%, 500=0.09%
     lat (usec): 750=0.12%, 1000=0.16%
     lat (msec): 2=1.12%, 4=0.92%, 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=16609
  read : io=4,038MiB, bw=159MiB/s, iops=10,193, runt= 25352msec
    clat (usec): min=2, max=116, avg=12.53, stdev= 3.03
    bw (KiB/s) : min=    0, max=247424, per=100.39%, avg=163725.96, stdev=47108.72
  write: io=1,024MiB, bw=49,143KiB/s, iops=3,071, runt= 21337msec
    clat (usec): min=3, max=1,081K, avg=33.69, stdev=4222.23
    bw (KiB/s) : min=    0, max=54336, per=100.30%, avg=49292.76, stdev=11048.26
  cpu          : usr=6.38%, sys=0.69%, ctx=4274, majf=0, minf=1114468
  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=258418/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.92%, 20=83.50%, 50=2.56%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17329msec, maxt=17329msec
  WRITE: io=4,096MiB, aggrb=21,961KiB/s, minb=21,961KiB/s, maxb=21,961KiB/s, mint=190983msec, maxt=190983msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25352msec, maxt=25352msec
  WRITE: io=1,024MiB, aggrb=49,143KiB/s, minb=49,143KiB/s, maxb=49,143KiB/s, mint=21337msec, maxt=21337msec

Disk stats (read/write):
  sda: ios=16634/62479, merge=806/1233861, ticks=246090/120945364, in_queue=121191400, util=93.28%
66.77user 30.48system 11:15.71elapsed 14%CPU (0avgtext+0avgdata 16861680maxresident)k
8390976inputs+18760816outputs (9major+3220656minor)pagefaults 0swaps