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=2469
  read : io=4,096MiB, bw=242MiB/s, iops=15,505, runt= 16906msec
    clat (usec): min=10, max=227, avg=12.15, stdev= 2.39
    bw (KiB/s) : min=    0, max=251136, per=97.15%, avg=241029.65, stdev=42768.00
  write: io=4,096MiB, bw=18,562KiB/s, iops=1,160, runt=225961msec
    clat (usec): min=14, max=514K, avg=765.02, stdev=7660.41
    bw (KiB/s) : min=    0, max=67584, per=102.84%, avg=19088.95, stdev=18999.80
  cpu          : usr=18.06%, sys=1.92%, ctx=18195, majf=0, minf=2102323
  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=87.36%, 50=9.26%, 100=0.11%, 250=0.06%, 500=0.03%
     lat (usec): 750=0.01%, 1000=0.02%
     lat (msec): 2=0.98%, 4=1.46%, 10=0.18%, 20=0.13%, 50=0.16%
     lat (msec): 100=0.15%, 250=0.09%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2685
  read : io=4,037MiB, bw=156MiB/s, iops=9,990, runt= 25862msec
    clat (usec): min=2, max=2,616, avg=17.11, stdev= 8.55
    bw (KiB/s) : min=    0, max=232960, per=97.18%, avg=155348.08, stdev=36858.71
  write: io=1,024MiB, bw=49,104KiB/s, iops=3,069, runt= 21354msec
    clat (usec): min=2, max=2,736, avg=21.85, stdev=21.18
    bw (KiB/s) : min=    0, max=52448, per=97.63%, avg=47938.98, stdev=7602.02
  cpu          : usr=7.17%, sys=1.09%, ctx=1501, majf=0, minf=1115096
  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=258378/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.09%, 20=45.94%, 50=40.94%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=242MiB/s, minb=242MiB/s, maxb=242MiB/s, mint=16906msec, maxt=16906msec
  WRITE: io=4,096MiB, aggrb=18,562KiB/s, minb=18,562KiB/s, maxb=18,562KiB/s, mint=225961msec, maxt=225961msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25862msec, maxt=25862msec
  WRITE: io=1,024MiB, aggrb=49,105KiB/s, minb=49,105KiB/s, maxb=49,105KiB/s, mint=21354msec, maxt=21354msec

Disk stats (read/write):
  sda: ios=17444/62189, merge=0/1234394, ticks=245264/92243870, in_queue=92489131, util=92.86%
67.17user 27.37system 10:59.63elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
8390816inputs+18768600outputs (33major+3221202minor)pagefaults 0swaps