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=14253
  read : io=4,096MiB, bw=231MiB/s, iops=14,779, runt= 17737msec
    clat (usec): min=11, max=103, avg=15.59, stdev= 2.09
    bw (KiB/s) : min=    0, max=248384, per=97.16%, avg=229774.22, stdev=39826.58
  write: io=4,096MiB, bw=20,958KiB/s, iops=1,309, runt=200121msec
    clat (usec): min=13, max=843K, avg=574.40, stdev=10418.79
    bw (KiB/s) : min=    0, max=84096, per=108.27%, avg=22691.74, stdev=24822.84
  cpu          : usr=29.79%, sys=4.20%, ctx=16758, 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=50.20%, 50=46.16%, 100=0.36%, 250=1.26%, 500=0.38%
     lat (usec): 750=0.29%, 1000=0.42%
     lat (msec): 2=0.45%, 4=0.06%, 10=0.12%, 20=0.09%, 50=0.06%
     lat (msec): 100=0.06%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14357
  read : io=4,037MiB, bw=159MiB/s, iops=10,183, runt= 25373msec
    clat (usec): min=2, max=1,050, avg=13.95, stdev= 4.06
    bw (KiB/s) : min=    0, max=247616, per=97.70%, avg=159196.75, stdev=41079.12
  write: io=1,024MiB, bw=49,603KiB/s, iops=3,100, runt= 21139msec
    clat (usec): min=3, max=288K, avg=22.40, stdev=1125.96
    bw (KiB/s) : min=    0, max=52576, per=97.86%, avg=48542.02, stdev=8959.72
  cpu          : usr=6.97%, sys=1.01%, ctx=20454, majf=0, minf=1113535
  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=258387/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.27%, 20=82.87%, 50=7.83%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17737msec, maxt=17737msec
  WRITE: io=4,096MiB, aggrb=20,958KiB/s, minb=20,958KiB/s, maxb=20,958KiB/s, mint=200121msec, maxt=200121msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25373msec, maxt=25373msec
  WRITE: io=1,024MiB, aggrb=49,604KiB/s, minb=49,604KiB/s, maxb=49,604KiB/s, mint=21139msec, maxt=21139msec

Disk stats (read/write):
  sda: ios=16814/63131, merge=627/1233241, ticks=239932/110878953, in_queue=111118774, util=93.02%
94.06user 54.96system 12:00.55elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390800inputs+18760792outputs (8major+3219699minor)pagefaults 0swaps