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=23797
  read : io=4,096MiB, bw=242MiB/s, iops=15,517, runt= 16893msec
    clat (usec): min=10, max=202, avg=12.14, stdev= 1.94
    bw (KiB/s) : min=    0, max=251488, per=97.14%, avg=241201.88, stdev=42807.64
  write: io=4,096MiB, bw=18,234KiB/s, iops=1,139, runt=230019msec
    clat (usec): min=14, max=736K, avg=780.82, stdev=7997.58
    bw (KiB/s) : min=    0, max=67840, per=102.77%, avg=18738.58, stdev=19163.00
  cpu          : usr=17.74%, sys=1.95%, ctx=17800, majf=0, minf=2102313
  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=84.96%, 50=11.66%, 100=0.11%, 250=0.06%, 500=0.03%
     lat (usec): 750=0.01%, 1000=0.02%
     lat (msec): 2=1.03%, 4=1.44%, 10=0.17%, 20=0.11%, 50=0.15%
     lat (msec): 100=0.16%, 250=0.09%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=24012
  read : io=4,036MiB, bw=156MiB/s, iops=9,961, runt= 25930msec
    clat (usec): min=2, max=598, avg=16.92, stdev= 4.96
    bw (KiB/s) : min=    0, max=229824, per=97.58%, avg=155530.46, stdev=37336.28
  write: io=1,024MiB, bw=48,610KiB/s, iops=3,038, runt= 21571msec
    clat (usec): min=3, max=2,611, avg=22.27, stdev=16.11
    bw (KiB/s) : min=    0, max=51424, per=97.77%, avg=47527.95, stdev=7456.14
  cpu          : usr=7.70%, sys=1.20%, ctx=2080, majf=0, minf=1114120
  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=258297/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.12%, 20=47.51%, 50=39.32%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): 2=0.01%, 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=242MiB/s, minb=242MiB/s, maxb=242MiB/s, mint=16893msec, maxt=16893msec
  WRITE: io=4,096MiB, aggrb=18,234KiB/s, minb=18,234KiB/s, maxb=18,234KiB/s, mint=230019msec, maxt=230019msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25930msec, maxt=25930msec
  WRITE: io=1,024MiB, aggrb=48,611KiB/s, minb=48,611KiB/s, maxb=48,611KiB/s, mint=21571msec, maxt=21571msec

Disk stats (read/write):
  sda: ios=17444/62030, merge=0/1233872, ticks=250776/86057081, in_queue=86307848, util=92.58%
66.96user 28.27system 10:42.86elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
8390696inputs+18765112outputs (32major+3220139minor)pagefaults 0swaps