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=32664
  read : io=4,096MiB, bw=229MiB/s, iops=14,635, runt= 17912msec
    clat (usec): min=12, max=109, avg=16.10, stdev= 2.52
    bw (KiB/s) : min=    0, max=244704, per=97.28%, avg=227808.89, stdev=39746.94
  write: io=4,096MiB, bw=17,204KiB/s, iops=1,075, runt=243797msec
    clat (usec): min=15, max=934K, avg=700.40, stdev=7957.24
    bw (KiB/s) : min=    0, max=78080, per=101.54%, avg=17468.94, stdev=14767.48
  cpu          : usr=29.99%, sys=4.31%, ctx=17143, 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=50.31%, 50=43.96%, 100=2.38%, 250=0.83%, 500=1.10%
     lat (usec): 750=0.17%, 1000=0.18%
     lat (msec): 2=0.25%, 4=0.11%, 10=0.18%, 20=0.13%, 50=0.16%
     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=479
  read : io=4,038MiB, bw=159MiB/s, iops=10,182, runt= 25379msec
    clat (usec): min=2, max=201, avg=15.32, stdev= 4.09
    bw (KiB/s) : min=    0, max=242912, per=97.71%, avg=159185.57, stdev=38880.04
  write: io=1,024MiB, bw=49,561KiB/s, iops=3,097, runt= 21157msec
    clat (usec): min=2, max=14,894, avg=20.27, stdev=58.29
    bw (KiB/s) : min=    0, max=52224, per=97.52%, avg=48333.77, stdev=7790.95
  cpu          : usr=7.83%, sys=1.28%, ctx=1047, majf=0, minf=1116461
  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=258412/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.84%, 20=73.11%, 50=18.01%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 20=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=229MiB/s, minb=229MiB/s, maxb=229MiB/s, mint=17912msec, maxt=17912msec
  WRITE: io=4,096MiB, aggrb=17,204KiB/s, minb=17,204KiB/s, maxb=17,204KiB/s, mint=243797msec, maxt=243797msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25379msec, maxt=25379msec
  WRITE: io=1,024MiB, aggrb=49,563KiB/s, minb=49,563KiB/s, maxb=49,563KiB/s, mint=21157msec, maxt=21157msec

Disk stats (read/write):
  sda: ios=17228/62155, merge=213/1234265, ticks=400818/91104185, in_queue=91504857, util=92.50%
102.63user 52.83system 11:07.36elapsed 23%CPU (0avgtext+0avgdata 0maxresident)k
8390640inputs+18777336outputs (8major+3222576minor)pagefaults 0swaps