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=2014
  read : io=4,096MiB, bw=239MiB/s, iops=15,304, runt= 17128msec
    clat (usec): min=11, max=158, avg=12.97, stdev= 2.10
    bw (KiB/s) : min=    0, max=248448, per=97.19%, avg=238005.03, stdev=41737.96
  write: io=4,096MiB, bw=19,204KiB/s, iops=1,200, runt=218398msec
    clat (usec): min=14, max=904K, avg=640.87, stdev=11789.66
    bw (KiB/s) : min=    0, max=83712, per=109.42%, avg=21013.49, stdev=23825.47
  cpu          : usr=29.54%, sys=3.77%, ctx=17046, 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=51.53%, 50=44.65%, 100=0.52%, 250=1.17%, 500=0.51%
     lat (usec): 750=0.28%, 1000=0.38%
     lat (msec): 2=0.46%, 4=0.06%, 10=0.12%, 20=0.10%, 50=0.06%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2123
  read : io=4,038MiB, bw=158MiB/s, iops=10,094, runt= 25601msec
    clat (usec): min=2, max=231, avg=15.59, stdev= 3.79
    bw (KiB/s) : min=    0, max=246080, per=97.76%, avg=157887.37, stdev=41683.08
  write: io=1,024MiB, bw=49,053KiB/s, iops=3,065, runt= 21376msec
    clat (usec): min=2, max=110, avg=20.79, stdev= 3.63
    bw (KiB/s) : min=    0, max=51360, per=97.69%, avg=47921.12, stdev=7933.49
  cpu          : usr=6.83%, sys=0.93%, ctx=13713, majf=0, minf=1114155
  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=258418/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.06%, 20=75.96%, 50=21.95%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17128msec, maxt=17128msec
  WRITE: io=4,096MiB, aggrb=19,204KiB/s, minb=19,204KiB/s, maxb=19,204KiB/s, mint=218398msec, maxt=218398msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25601msec, maxt=25601msec
  WRITE: io=1,024MiB, aggrb=49,053KiB/s, minb=49,053KiB/s, maxb=49,053KiB/s, mint=21376msec, maxt=21376msec

Disk stats (read/write):
  sda: ios=16782/62275, merge=659/1234165, ticks=263467/116284703, in_queue=116548078, util=92.99%
94.58user 58.80system 12:20.43elapsed 20%CPU (0avgtext+0avgdata 16861296maxresident)k
8390392inputs+18761272outputs (7major+3220381minor)pagefaults 0swaps