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=29973
  read : io=4,096MiB, bw=232MiB/s, iops=14,847, runt= 17656msec
    clat (usec): min=11, max=104, avg=15.34, stdev= 1.99
    bw (KiB/s) : min=    0, max=250432, per=97.24%, avg=231008.89, stdev=39907.03
  write: io=4,096MiB, bw=20,647KiB/s, iops=1,290, runt=203134msec
    clat (usec): min=14, max=804K, avg=568.64, stdev=9597.89
    bw (KiB/s) : min=    0, max=80800, per=105.47%, avg=21775.88, stdev=20744.71
  cpu          : usr=32.42%, sys=4.38%, ctx=61583, majf=1, minf=2102309
  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=51.61%, 50=44.67%, 100=0.44%, 250=1.54%, 500=0.38%
     lat (usec): 750=0.21%, 1000=0.28%
     lat (msec): 2=0.35%, 4=0.08%, 10=0.12%, 20=0.09%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=30205
  read : io=4,036MiB, bw=159MiB/s, iops=10,156, runt= 25431msec
    clat (usec): min=3, max=175, avg=13.79, stdev= 4.00
    bw (KiB/s) : min=    0, max=245216, per=98.00%, avg=159261.49, stdev=46191.34
  write: io=1,024MiB, bw=48,966KiB/s, iops=3,060, runt= 21414msec
    clat (usec): min=2, max=142, avg=18.29, stdev= 4.89
    bw (KiB/s) : min=    0, max=53440, per=97.12%, avg=47555.40, stdev=10466.62
  cpu          : usr=7.01%, sys=1.12%, ctx=24696, majf=0, minf=1114175
  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=258292/65536, short=0/0
     lat (usec): 4=0.01%, 10=11.15%, 20=80.94%, 50=7.88%, 100=0.02%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17656msec, maxt=17656msec
  WRITE: io=4,096MiB, aggrb=20,647KiB/s, minb=20,647KiB/s, maxb=20,647KiB/s, mint=203134msec, maxt=203134msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25431msec, maxt=25431msec
  WRITE: io=1,024MiB, aggrb=48,968KiB/s, minb=48,968KiB/s, maxb=48,968KiB/s, mint=21414msec, maxt=21414msec

Disk stats (read/write):
  sda: ios=16693/73892, merge=748/1222009, ticks=232392/111749495, in_queue=111981765, util=92.57%
98.76user 50.61system 11:12.49elapsed 22%CPU (0avgtext+0avgdata 16861312maxresident)k
8390784inputs+18757200outputs (9major+3220322minor)pagefaults 0swaps