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=20589
  read : io=4,096MiB, bw=239MiB/s, iops=15,312, runt= 17120msec
    clat (usec): min=11, max=170, avg=12.79, stdev= 1.29
    bw (KiB/s) : min=    0, max=248896, per=97.21%, avg=238164.86, stdev=42235.61
  write: io=4,096MiB, bw=18,433KiB/s, iops=1,152, runt=227543msec
    clat (usec): min=14, max=808K, avg=771.78, stdev=7738.56
    bw (KiB/s) : min=    0, max=66427, per=102.71%, avg=18932.19, stdev=17027.04
  cpu          : usr=17.44%, sys=2.44%, ctx=18591, majf=0, minf=2102312
  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=65.40%, 50=31.22%, 100=0.02%, 250=0.09%, 500=0.02%
     lat (usec): 750=0.07%, 1000=0.03%
     lat (msec): 2=0.80%, 4=1.41%, 10=0.42%, 20=0.14%, 50=0.15%
     lat (msec): 100=0.15%, 250=0.08%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20810
  read : io=4,036MiB, bw=31,324KiB/s, iops=1,957, runt=131950msec
    clat (usec): min=2, max=845, avg=17.00, stdev= 5.90
    bw (KiB/s) : min=    0, max=234144, per=294.68%, avg=92304.14, stdev=79164.31
  write: io=1,024MiB, bw=8,224KiB/s, iops=514, runt=127494msec
    clat (usec): min=2, max=8,207K, avg=1637.97, stdev=83425.37
    bw (KiB/s) : min=    0, max=51136, per=310.97%, avg=25573.79, stdev=22813.73
  cpu          : usr=6.23%, sys=1.17%, ctx=15233, majf=0, minf=1123359
  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=258330/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.10%, 20=44.43%, 50=42.35%, 100=0.08%
     lat (usec): 250=0.03%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 250=0.01%, 500=0.01%, 750=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17120msec, maxt=17120msec
  WRITE: io=4,096MiB, aggrb=18,433KiB/s, minb=18,433KiB/s, maxb=18,433KiB/s, mint=227543msec, maxt=227543msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=31,324KiB/s, minb=31,324KiB/s, maxb=31,324KiB/s, mint=131950msec, maxt=131950msec
  WRITE: io=1,024MiB, aggrb=8,224KiB/s, minb=8,224KiB/s, maxb=8,224KiB/s, mint=127494msec, maxt=127494msec

Disk stats (read/write):
  sda: ios=18407/63195, merge=14388/1235684, ticks=260851/61148827, in_queue=61409658, util=94.62%
66.91user 33.08system 12:15.53elapsed 13%CPU (0avgtext+0avgdata 0maxresident)k
8390824inputs+18838136outputs (33major+3229681minor)pagefaults 0swaps