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=10943
  read : io=4,096MiB, bw=236MiB/s, iops=15,108, runt= 17351msec
    clat (usec): min=10, max=214, avg=13.88, stdev= 2.28
    bw (KiB/s) : min=    0, max=249888, per=97.10%, avg=234719.09, stdev=41029.48
  write: io=4,096MiB, bw=22,582KiB/s, iops=1,411, runt=185729msec
    clat (usec): min=13, max=931K, avg=611.66, stdev=8617.37
    bw (KiB/s) : min=    0, max=88352, per=104.15%, avg=23519.01, stdev=18293.99
  cpu          : usr=19.12%, sys=2.66%, ctx=41166, 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=94.15%, 50=2.46%, 100=0.27%, 250=0.18%, 500=0.14%
     lat (usec): 750=0.19%, 1000=0.21%
     lat (msec): 2=1.01%, 4=0.71%, 10=0.16%, 20=0.20%, 50=0.17%
     lat (msec): 100=0.11%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=11148
  read : io=4,039MiB, bw=160MiB/s, iops=10,265, runt= 25177msec
    clat (usec): min=2, max=113, avg=13.33, stdev= 3.26
    bw (KiB/s) : min=    0, max=247552, per=99.23%, avg=162995.80, stdev=44639.52
  write: io=1,024MiB, bw=49,639KiB/s, iops=3,102, runt= 21124msec
    clat (usec): min=2, max=699K, avg=27.98, stdev=2728.78
    bw (KiB/s) : min=    0, max=53344, per=99.02%, avg=49152.38, stdev=9835.84
  cpu          : usr=6.50%, sys=0.69%, ctx=1348, majf=0, minf=1114873
  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=258464/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.69%, 20=83.71%, 50=3.57%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17351msec, maxt=17351msec
  WRITE: io=4,096MiB, aggrb=22,582KiB/s, minb=22,582KiB/s, maxb=22,582KiB/s, mint=185729msec, maxt=185729msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25177msec, maxt=25177msec
  WRITE: io=1,024MiB, aggrb=49,641KiB/s, minb=49,641KiB/s, maxb=49,641KiB/s, mint=21124msec, maxt=21124msec

Disk stats (read/write):
  sda: ios=16891/64151, merge=550/1232448, ticks=226699/123682912, in_queue=123909545, util=93.15%
66.91user 33.52system 11:19.23elapsed 14%CPU (0avgtext+0avgdata 16861648maxresident)k
8390688inputs+18762928outputs (7major+3221063minor)pagefaults 0swaps