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=1959
  read : io=4,096MiB, bw=226MiB/s, iops=14,459, runt= 18130msec
    clat (usec): min=12, max=120, avg=17.02, stdev= 1.93
    bw (KiB/s) : min=    0, max=245728, per=97.26%, avg=225017.08, stdev=38270.28
  write: io=4,096MiB, bw=20,274KiB/s, iops=1,267, runt=206880msec
    clat (usec): min=15, max=884K, avg=585.09, stdev=9940.04
    bw (KiB/s) : min=    0, max=82944, per=105.87%, avg=21464.43, stdev=20777.72
  cpu          : usr=31.83%, sys=4.13%, ctx=61993, majf=1, minf=2102311
  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=50.62%, 50=45.68%, 100=0.44%, 250=1.46%, 500=0.36%
     lat (usec): 750=0.22%, 1000=0.30%
     lat (msec): 2=0.37%, 4=0.07%, 10=0.12%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.09%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2228
  read : io=4,038MiB, bw=161MiB/s, iops=10,273, runt= 25154msec
    clat (usec): min=2, max=229, avg=13.28, stdev= 3.31
    bw (KiB/s) : min=    0, max=245760, per=97.92%, avg=160966.27, stdev=45429.48
  write: io=1,024MiB, bw=49,778KiB/s, iops=3,111, runt= 21065msec
    clat (usec): min=3, max=314K, avg=22.70, stdev=1225.52
    bw (KiB/s) : min=    0, max=54112, per=97.69%, avg=48628.58, stdev=10004.71
  cpu          : usr=6.70%, sys=0.99%, ctx=11770, majf=0, minf=1113965
  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=258425/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.29%, 20=82.46%, 50=5.23%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=226MiB/s, minb=226MiB/s, maxb=226MiB/s, mint=18130msec, maxt=18130msec
  WRITE: io=4,096MiB, aggrb=20,274KiB/s, minb=20,274KiB/s, maxb=20,274KiB/s, mint=206880msec, maxt=206880msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25154msec, maxt=25154msec
  WRITE: io=1,024MiB, aggrb=49,779KiB/s, minb=49,779KiB/s, maxb=49,779KiB/s, mint=21065msec, maxt=21065msec

Disk stats (read/write):
  sda: ios=16677/68058, merge=764/1228396, ticks=240640/117447723, in_queue=117688212, util=92.84%
98.23user 48.98system 11:19.82elapsed 21%CPU (0avgtext+0avgdata 16861264maxresident)k
8390648inputs+18761384outputs (8major+3220159minor)pagefaults 0swaps