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=26566
  read : io=4,096MiB, bw=241MiB/s, iops=15,407, runt= 17014msec
    clat (usec): min=10, max=112, avg=12.75, stdev= 1.67
    bw (KiB/s) : min=    0, max=251712, per=97.15%, avg=239501.71, stdev=41918.28
  write: io=4,096MiB, bw=22,610KiB/s, iops=1,413, runt=185504msec
    clat (usec): min=12, max=906K, avg=611.00, stdev=8836.53
    bw (KiB/s) : min=    0, max=88928, per=104.15%, avg=23548.65, stdev=18180.57
  cpu          : usr=19.04%, sys=2.33%, ctx=19023, 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=94.82%, 50=1.80%, 100=0.28%, 250=0.13%, 500=0.13%
     lat (usec): 750=0.19%, 1000=0.23%
     lat (msec): 2=1.03%, 4=0.72%, 10=0.16%, 20=0.18%, 50=0.16%
     lat (msec): 100=0.11%, 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=26756
  read : io=4,039MiB, bw=146MiB/s, iops=9,369, runt= 27590msec
    clat (usec): min=2, max=260, avg=12.63, stdev= 3.24
    bw (KiB/s) : min=    0, max=250272, per=109.10%, avg=163547.66, stdev=46881.44
  write: io=1,024MiB, bw=44,487KiB/s, iops=2,780, runt= 23570msec
    clat (usec): min=2, max=3,278K, avg=66.53, stdev=12803.08
    bw (KiB/s) : min=    0, max=54400, per=110.75%, avg=49270.40, stdev=10872.22
  cpu          : usr=5.95%, sys=0.58%, ctx=2009, majf=0, minf=1114808
  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=258493/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.46%, 20=85.04%, 50=1.46%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=241MiB/s, minb=241MiB/s, maxb=241MiB/s, mint=17014msec, maxt=17014msec
  WRITE: io=4,096MiB, aggrb=22,610KiB/s, minb=22,610KiB/s, maxb=22,610KiB/s, mint=185504msec, maxt=185504msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=146MiB/s, minb=146MiB/s, maxb=146MiB/s, mint=27590msec, maxt=27590msec
  WRITE: io=1,024MiB, aggrb=44,488KiB/s, minb=44,488KiB/s, maxb=44,488KiB/s, mint=23570msec, maxt=23570msec

Disk stats (read/write):
  sda: ios=16924/61234, merge=517/1235352, ticks=228429/131055418, in_queue=131283784, util=93.75%
66.47user 30.12system 11:46.77elapsed 13%CPU (0avgtext+0avgdata 16861648maxresident)k
8390984inputs+18762768outputs (9major+3221111minor)pagefaults 0swaps