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=17561
  read : io=4,096MiB, bw=229MiB/s, iops=14,659, runt= 17882msec
    clat (usec): min=12, max=111, avg=16.09, stdev= 2.49
    bw (KiB/s) : min=    0, max=244384, per=97.28%, avg=228180.44, stdev=39768.79
  write: io=4,096MiB, bw=17,103KiB/s, iops=1,068, runt=245233msec
    clat (usec): min=14, max=902K, avg=706.19, stdev=8099.89
    bw (KiB/s) : min=    0, max=78656, per=102.38%, avg=17509.95, stdev=15242.34
  cpu          : usr=29.83%, sys=4.25%, ctx=15793, majf=1, minf=2102338
  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=49.78%, 50=44.53%, 100=2.33%, 250=0.97%, 500=0.99%
     lat (usec): 750=0.16%, 1000=0.18%
     lat (msec): 2=0.25%, 4=0.10%, 10=0.18%, 20=0.14%, 50=0.15%
     lat (msec): 100=0.17%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17683
  read : io=4,039MiB, bw=157MiB/s, iops=10,067, runt= 25672msec
    clat (usec): min=2, max=193, avg=15.18, stdev= 3.99
    bw (KiB/s) : min=    0, max=242336, per=97.98%, avg=157826.12, stdev=39851.85
  write: io=1,024MiB, bw=48,955KiB/s, iops=3,059, runt= 21419msec
    clat (usec): min=3, max=218K, avg=22.75, stdev=851.57
    bw (KiB/s) : min=    0, max=52096, per=97.94%, avg=47947.81, stdev=8201.36
  cpu          : usr=7.39%, sys=1.29%, ctx=1516, majf=0, minf=1116860
  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=258464/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.63%, 20=77.03%, 50=14.29%, 100=0.03%
     lat (usec): 250=0.01%
     lat (msec): 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=229MiB/s, minb=229MiB/s, maxb=229MiB/s, mint=17882msec, maxt=17882msec
  WRITE: io=4,096MiB, aggrb=17,103KiB/s, minb=17,103KiB/s, maxb=17,103KiB/s, mint=245233msec, maxt=245233msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25672msec, maxt=25672msec
  WRITE: io=1,024MiB, aggrb=48,955KiB/s, minb=48,955KiB/s, maxb=48,955KiB/s, mint=21419msec, maxt=21419msec

Disk stats (read/write):
  sda: ios=17217/62228, merge=224/1234465, ticks=403752/95410674, in_queue=95814259, util=92.73%
102.51user 53.10system 11:25.43elapsed 22%CPU (0avgtext+0avgdata 0maxresident)k
8390776inputs+18779112outputs (9major+3223080minor)pagefaults 0swaps