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=12713
  read : io=4,096MiB, bw=236MiB/s, iops=15,130, runt= 17325msec
    clat (usec): min=11, max=197, avg=13.98, stdev= 1.91
    bw (KiB/s) : min=    0, max=248992, per=97.18%, avg=235283.20, stdev=41292.82
  write: io=4,096MiB, bw=19,258KiB/s, iops=1,203, runt=217793msec
    clat (usec): min=15, max=801K, avg=734.18, stdev=7708.43
    bw (KiB/s) : min=    0, max=66368, per=102.80%, avg=19796.98, stdev=17559.88
  cpu          : usr=18.36%, sys=2.53%, ctx=18696, 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=65.01%, 50=31.59%, 100=0.02%, 250=0.11%, 500=0.03%
     lat (usec): 750=0.08%, 1000=0.03%
     lat (msec): 2=0.99%, 4=1.38%, 10=0.27%, 20=0.14%, 50=0.14%
     lat (msec): 100=0.16%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12928
  read : io=4,036MiB, bw=37,470KiB/s, iops=2,341, runt=110309msec
    clat (usec): min=2, max=455, avg=16.63, stdev= 4.78
    bw (KiB/s) : min=    0, max=237088, per=234.82%, avg=87987.08, stdev=80892.15
  write: io=1,024MiB, bw=9,889KiB/s, iops=618, runt=106024msec
    clat (usec): min=2, max=3,598K, avg=1312.43, stdev=55701.83
    bw (KiB/s) : min=    0, max=50208, per=240.59%, avg=23794.14, stdev=22699.39
  cpu          : usr=7.23%, sys=1.33%, ctx=1757, majf=0, minf=1121956
  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=258331/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.17%, 20=49.65%, 50=37.11%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 250=0.01%, 750=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17325msec, maxt=17325msec
  WRITE: io=4,096MiB, aggrb=19,258KiB/s, minb=19,258KiB/s, maxb=19,258KiB/s, mint=217793msec, maxt=217793msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=37,470KiB/s, minb=37,470KiB/s, maxb=37,470KiB/s, mint=110309msec, maxt=110309msec
  WRITE: io=1,024MiB, aggrb=9,890KiB/s, minb=9,890KiB/s, maxb=9,890KiB/s, mint=106024msec, maxt=106024msec

Disk stats (read/write):
  sda: ios=18417/63022, merge=14379/1235886, ticks=248862/53720407, in_queue=53969256, util=93.95%
67.13user 34.27system 10:56.68elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390808inputs+18820144outputs (33major+3228024minor)pagefaults 0swaps