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=32081
  read : io=4,096MiB, bw=227MiB/s, iops=14,516, runt= 18058msec
    clat (usec): min=10, max=2,209, avg=14.59, stdev= 7.22
    bw (KiB/s) : min=    0, max=247488, per=97.29%, avg=225978.81, stdev=42996.12
  write: io=4,096MiB, bw=20,407KiB/s, iops=1,275, runt=205530msec
    clat (usec): min=14, max=812K, avg=583.47, stdev=9890.26
    bw (KiB/s) : min=    0, max=79296, per=105.92%, avg=21614.92, stdev=21448.48
  cpu          : usr=31.85%, sys=3.76%, ctx=30073, 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=46.07%, 100=0.36%, 250=1.50%, 500=0.31%
     lat (usec): 750=0.25%, 1000=0.29%
     lat (msec): 2=0.38%, 4=0.07%, 10=0.13%, 20=0.10%, 50=0.07%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=32349
  read : io=4,039MiB, bw=158MiB/s, iops=10,089, runt= 25623msec
    clat (usec): min=2, max=650, avg=15.38, stdev= 4.41
    bw (KiB/s) : min=    0, max=243104, per=97.74%, avg=157776.94, stdev=41219.47
  write: io=1,024MiB, bw=48,982KiB/s, iops=3,061, runt= 21407msec
    clat (usec): min=6, max=250, avg=19.90, stdev= 4.37
    bw (KiB/s) : min=    0, max=51296, per=97.74%, avg=47875.72, stdev=8034.84
  cpu          : usr=6.86%, sys=0.98%, ctx=9630, majf=0, minf=1114403
  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=258514/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.78%, 20=71.97%, 50=22.23%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=227MiB/s, minb=227MiB/s, maxb=227MiB/s, mint=18058msec, maxt=18058msec
  WRITE: io=4,096MiB, aggrb=20,407KiB/s, minb=20,407KiB/s, maxb=20,407KiB/s, mint=205530msec, maxt=205530msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25623msec, maxt=25623msec
  WRITE: io=1,024MiB, aggrb=48,984KiB/s, minb=48,984KiB/s, maxb=48,984KiB/s, mint=21407msec, maxt=21407msec

Disk stats (read/write):
  sda: ios=16706/64691, merge=735/1232098, ticks=237352/116751953, in_queue=116989183, util=92.76%
97.99user 47.69system 11:20.13elapsed 21%CPU (0avgtext+0avgdata 16861280maxresident)k
8390648inputs+18764248outputs (8major+3220585minor)pagefaults 0swaps