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=20464
  read : io=4,096MiB, bw=230MiB/s, iops=14,693, runt= 17841msec
    clat (usec): min=11, max=134, avg=15.98, stdev= 2.18
    bw (KiB/s) : min=    0, max=246816, per=97.27%, avg=228670.22, stdev=39674.89
  write: io=4,096MiB, bw=19,635KiB/s, iops=1,227, runt=213611msec
    clat (usec): min=15, max=760K, avg=616.77, stdev=10602.43
    bw (KiB/s) : min=    0, max=80896, per=106.68%, avg=20947.45, stdev=21782.72
  cpu          : usr=30.21%, sys=3.86%, ctx=27522, 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=50.50%, 50=45.68%, 100=0.55%, 250=1.37%, 500=0.34%
     lat (usec): 750=0.24%, 1000=0.32%
     lat (msec): 2=0.42%, 4=0.08%, 10=0.15%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20735
  read : io=4,037MiB, bw=159MiB/s, iops=10,195, runt= 25340msec
    clat (usec): min=2, max=143, avg=15.26, stdev= 3.65
    bw (KiB/s) : min=    0, max=247264, per=97.81%, avg=159543.84, stdev=40758.73
  write: io=1,024MiB, bw=49,442KiB/s, iops=3,090, runt= 21208msec
    clat (usec): min=4, max=279, avg=20.68, stdev= 3.98
    bw (KiB/s) : min=    0, max=51424, per=97.60%, avg=48258.23, stdev=7742.79
  cpu          : usr=6.74%, sys=1.00%, ctx=9948, majf=0, minf=1113959
  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=258342/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.63%, 20=77.23%, 50=19.12%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17841msec, maxt=17841msec
  WRITE: io=4,096MiB, aggrb=19,635KiB/s, minb=19,635KiB/s, maxb=19,635KiB/s, mint=213611msec, maxt=213611msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25340msec, maxt=25340msec
  WRITE: io=1,024MiB, aggrb=49,444KiB/s, minb=49,444KiB/s, maxb=49,444KiB/s, mint=21208msec, maxt=21208msec

Disk stats (read/write):
  sda: ios=16704/64051, merge=738/1232139, ticks=258646/117351874, in_queue=117610405, util=92.87%
96.76user 53.48system 12:21.95elapsed 20%CPU (0avgtext+0avgdata 16861296maxresident)k
8390528inputs+18759512outputs (8major+3220201minor)pagefaults 0swaps