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=12930
  read : io=4,096MiB, bw=231MiB/s, iops=14,796, runt= 17717msec
    clat (usec): min=11, max=816, avg=15.40, stdev= 2.91
    bw (KiB/s) : min=    0, max=246560, per=97.26%, avg=230256.89, stdev=40123.91
  write: io=4,096MiB, bw=20,077KiB/s, iops=1,254, runt=208904msec
    clat (usec): min=14, max=945K, avg=585.11, stdev=10251.28
    bw (KiB/s) : min=    0, max=83744, per=106.35%, avg=21351.83, stdev=18890.78
  cpu          : usr=31.51%, sys=4.98%, ctx=68854, majf=1, minf=2102311
  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=50.24%, 50=44.79%, 100=1.71%, 250=0.83%, 500=1.14%
     lat (usec): 750=0.19%, 1000=0.22%
     lat (msec): 2=0.30%, 4=0.07%, 10=0.14%, 20=0.12%, 50=0.08%
     lat (msec): 100=0.13%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=13044
  read : io=4,037MiB, bw=154MiB/s, iops=9,844, runt= 26247msec
    clat (usec): min=2, max=1,263, avg=14.82, stdev= 4.86
    bw (KiB/s) : min=    0, max=247392, per=99.80%, avg=157189.82, stdev=44752.63
  write: io=1,024MiB, bw=47,537KiB/s, iops=2,971, runt= 22058msec
    clat (usec): min=3, max=904K, avg=33.28, stdev=3531.98
    bw (KiB/s) : min=    0, max=51616, per=100.00%, avg=47539.30, stdev=9642.26
  cpu          : usr=6.82%, sys=0.97%, ctx=32435, majf=0, minf=1113853
  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=258379/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.38%, 20=75.62%, 50=15.95%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%, 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17717msec, maxt=17717msec
  WRITE: io=4,096MiB, aggrb=20,077KiB/s, minb=20,077KiB/s, maxb=20,077KiB/s, mint=208904msec, maxt=208904msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26247msec, maxt=26247msec
  WRITE: io=1,024MiB, aggrb=47,538KiB/s, minb=47,538KiB/s, maxb=47,538KiB/s, mint=22058msec, maxt=22058msec

Disk stats (read/write):
  sda: ios=16585/69468, merge=856/1226813, ticks=230133/112715326, in_queue=112945353, util=93.14%
100.54user 52.21system 11:29.05elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8390968inputs+18760200outputs (9major+3220076minor)pagefaults 0swaps