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=6090
  read : io=4,096MiB, bw=235MiB/s, iops=15,026, runt= 17446msec
    clat (usec): min=11, max=143, avg=14.16, stdev= 2.43
    bw (KiB/s) : min=    0, max=247328, per=97.09%, avg=233418.97, stdev=41132.01
  write: io=4,096MiB, bw=20,081KiB/s, iops=1,255, runt=208866msec
    clat (usec): min=14, max=873K, avg=565.85, stdev=9356.36
    bw (KiB/s) : min=    0, max=79200, per=105.91%, avg=21268.71, stdev=17733.97
  cpu          : usr=30.91%, sys=4.81%, ctx=41730, majf=1, minf=2102310
  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=49.95%, 50=46.00%, 100=0.71%, 250=1.58%, 500=0.40%
     lat (usec): 750=0.11%, 1000=0.13%
     lat (msec): 2=0.20%, 4=0.15%, 10=0.31%, 20=0.20%, 50=0.16%
     lat (msec): 100=0.06%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=6369
  read : io=4,038MiB, bw=153MiB/s, iops=9,771, runt= 26449msec
    clat (usec): min=2, max=248, avg=15.13, stdev= 3.75
    bw (KiB/s) : min=    0, max=245152, per=100.56%, avg=157224.69, stdev=44004.53
  write: io=1,024MiB, bw=47,275KiB/s, iops=2,954, runt= 22180msec
    clat (usec): min=2, max=1,149K, avg=37.78, stdev=4487.24
    bw (KiB/s) : min=    0, max=52384, per=101.24%, avg=47862.07, stdev=9531.19
  cpu          : usr=6.54%, sys=0.94%, ctx=5586, majf=0, minf=1113503
  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=258438/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.61%, 20=77.29%, 50=17.08%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17446msec, maxt=17446msec
  WRITE: io=4,096MiB, aggrb=20,081KiB/s, minb=20,081KiB/s, maxb=20,081KiB/s, mint=208866msec, maxt=208866msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26449msec, maxt=26449msec
  WRITE: io=1,024MiB, aggrb=47,276KiB/s, minb=47,276KiB/s, maxb=47,276KiB/s, mint=22180msec, maxt=22180msec

Disk stats (read/write):
  sda: ios=17254/63717, merge=187/1232831, ticks=249096/127617201, in_queue=127866163, util=93.51%
105.29user 53.29system 12:50.68elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390824inputs+18762328outputs (9major+3219864minor)pagefaults 0swaps