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=18370
  read : io=4,096MiB, bw=239MiB/s, iops=15,267, runt= 17170msec
    clat (usec): min=10, max=146, avg=13.21, stdev= 2.53
    bw (KiB/s) : min=    0, max=251584, per=97.12%, avg=237254.40, stdev=41874.47
  write: io=4,096MiB, bw=21,204KiB/s, iops=1,325, runt=197807msec
    clat (usec): min=13, max=795K, avg=553.89, stdev=9652.96
    bw (KiB/s) : min=    0, max=82016, per=105.76%, avg=22424.89, stdev=21927.98
  cpu          : usr=31.89%, sys=3.94%, ctx=86075, 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=52.18%, 50=44.34%, 100=0.20%, 250=1.47%, 500=0.32%
     lat (usec): 750=0.25%, 1000=0.31%
     lat (msec): 2=0.42%, 4=0.06%, 10=0.13%, 20=0.09%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=18612
  read : io=4,039MiB, bw=156MiB/s, iops=9,985, runt= 25883msec
    clat (usec): min=2, max=3,071, avg=13.58, stdev= 6.95
    bw (KiB/s) : min=    0, max=247392, per=99.93%, avg=159661.64, stdev=44307.12
  write: io=1,024MiB, bw=48,148KiB/s, iops=3,009, runt= 21778msec
    clat (usec): min=2, max=799K, avg=32.64, stdev=3195.72
    bw (KiB/s) : min=    0, max=53440, per=99.97%, avg=48134.83, stdev=9585.22
  cpu          : usr=6.78%, sys=0.96%, ctx=21008, majf=0, minf=1114571
  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=258467/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.50%, 20=83.18%, 50=8.27%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 4=0.01%, 250=0.01%, 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17170msec, maxt=17170msec
  WRITE: io=4,096MiB, aggrb=21,204KiB/s, minb=21,204KiB/s, maxb=21,204KiB/s, mint=197807msec, maxt=197807msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25883msec, maxt=25883msec
  WRITE: io=1,024MiB, aggrb=48,149KiB/s, minb=48,149KiB/s, maxb=48,149KiB/s, mint=21778msec, maxt=21778msec

Disk stats (read/write):
  sda: ios=16724/71717, merge=718/1224867, ticks=226014/114750226, in_queue=114976127, util=92.98%
96.65user 47.44system 11:44.78elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390832inputs+18762736outputs (8major+3220733minor)pagefaults 0swaps