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=26538
  read : io=4,096MiB, bw=202MiB/s, iops=12,934, runt= 20267msec
    clat (usec): min=12, max=3,072, avg=17.99, stdev= 7.98
    bw (KiB/s) : min=    0, max=242624, per=97.44%, avg=201667.90, stdev=54927.16
  write: io=4,096MiB, bw=17,980KiB/s, iops=1,123, runt=233266msec
    clat (usec): min=16, max=740K, avg=675.67, stdev=7368.14
    bw (KiB/s) : min=    0, max=65728, per=102.26%, avg=18386.55, stdev=16887.38
  cpu          : usr=30.49%, sys=4.85%, ctx=17440, majf=0, minf=2102313
  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=45.39%, 50=47.90%, 100=3.31%, 250=0.43%, 500=0.95%
     lat (usec): 750=0.09%, 1000=0.20%
     lat (msec): 2=0.81%, 4=0.21%, 10=0.18%, 20=0.13%, 50=0.16%
     lat (msec): 100=0.16%, 250=0.06%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=26809
  read : io=4,037MiB, bw=35,328KiB/s, iops=2,208, runt=117012msec
    clat (usec): min=2, max=1,304, avg=24.14, stdev=12.51
    bw (KiB/s) : min=    0, max=227456, per=215.30%, avg=76062.45, stdev=69291.24
  write: io=1,024MiB, bw=9,279KiB/s, iops=579, runt=113001msec
    clat (usec): min=3, max=3,303K, avg=1252.01, stdev=50431.56
    bw (KiB/s) : min=    0, max=50304, per=223.36%, avg=20725.57, stdev=19923.22
  cpu          : usr=11.15%, sys=2.54%, ctx=21904, majf=0, minf=1128236
  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=258369/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.42%, 20=33.44%, 50=56.49%, 100=5.57%
     lat (usec): 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=202MiB/s, minb=202MiB/s, maxb=202MiB/s, mint=20267msec, maxt=20267msec
  WRITE: io=4,096MiB, aggrb=17,980KiB/s, minb=17,980KiB/s, maxb=17,980KiB/s, mint=233266msec, maxt=233266msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=35,328KiB/s, minb=35,328KiB/s, maxb=35,328KiB/s, mint=117012msec, maxt=117012msec
  WRITE: io=1,024MiB, aggrb=9,279KiB/s, minb=9,279KiB/s, maxb=9,279KiB/s, mint=113001msec, maxt=113001msec

Disk stats (read/write):
  sda: ios=18409/62512, merge=14387/1235961, ticks=255977/51332409, in_queue=51588450, util=92.47%
112.43user 69.95system 11:55.16elapsed 25%CPU (0avgtext+0avgdata 0maxresident)k
8390592inputs+18870968outputs (33major+3234331minor)pagefaults 0swaps