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=27896
  read : io=4,096MiB, bw=220MiB/s, iops=14,091, runt= 18603msec
    clat (usec): min=14, max=109, avg=18.68, stdev= 2.37
    bw (KiB/s) : min=    0, max=235040, per=97.39%, avg=219588.21, stdev=37118.05
  write: io=4,096MiB, bw=20,529KiB/s, iops=1,283, runt=204303msec
    clat (usec): min=17, max=769K, avg=548.47, stdev=6902.90
    bw (KiB/s) : min=    0, max=78240, per=102.02%, avg=20943.73, stdev=14424.90
  cpu          : usr=31.39%, sys=5.45%, ctx=80274, majf=1, minf=2102341
  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=22.87%, 50=71.10%, 100=2.70%, 250=1.67%, 500=0.28%
     lat (usec): 750=0.13%, 1000=0.16%
     lat (msec): 2=0.18%, 4=0.15%, 10=0.27%, 20=0.21%, 50=0.16%
     lat (msec): 100=0.09%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=27983
  read : io=4,037MiB, bw=152MiB/s, iops=9,717, runt= 26586msec
    clat (usec): min=2, max=235, avg=18.55, stdev= 6.36
    bw (KiB/s) : min=    0, max=237600, per=97.28%, avg=151245.28, stdev=38751.27
  write: io=1,024MiB, bw=47,344KiB/s, iops=2,959, runt= 22148msec
    clat (usec): min=3, max=243, avg=23.91, stdev= 6.47
    bw (KiB/s) : min=    0, max=51104, per=97.80%, avg=46305.31, stdev=7779.02
  cpu          : usr=6.75%, sys=1.30%, ctx=15602, majf=0, minf=1113121
  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=258344/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.93%, 20=42.52%, 50=51.51%, 100=0.02%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=220MiB/s, minb=220MiB/s, maxb=220MiB/s, mint=18603msec, maxt=18603msec
  WRITE: io=4,096MiB, aggrb=20,529KiB/s, minb=20,529KiB/s, maxb=20,529KiB/s, mint=204303msec, maxt=204303msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=152MiB/s, minb=152MiB/s, maxb=152MiB/s, mint=26586msec, maxt=26586msec
  WRITE: io=1,024MiB, aggrb=47,345KiB/s, minb=47,345KiB/s, maxb=47,345KiB/s, mint=22148msec, maxt=22148msec

Disk stats (read/write):
  sda: ios=16644/72846, merge=796/1223245, ticks=248738/122054935, in_queue=122303558, util=93.07%
106.30user 48.11system 13:03.61elapsed 19%CPU (0avgtext+0avgdata 16861184maxresident)k
8390600inputs+18759216outputs (8major+3219475minor)pagefaults 0swaps