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=11503
  read : io=4,096MiB, bw=234MiB/s, iops=14,987, runt= 17491msec
    clat (usec): min=11, max=146, avg=14.32, stdev= 2.40
    bw (KiB/s) : min=    0, max=246528, per=97.08%, avg=232814.63, stdev=40806.66
  write: io=4,096MiB, bw=20,398KiB/s, iops=1,274, runt=205618msec
    clat (usec): min=15, max=1,033K, avg=555.75, stdev=9183.99
    bw (KiB/s) : min=    0, max=79104, per=105.50%, avg=21519.94, stdev=17942.82
  cpu          : usr=31.16%, sys=4.74%, ctx=33055, 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=49.70%, 50=46.50%, 100=0.47%, 250=1.71%, 500=0.30%
     lat (usec): 750=0.12%, 1000=0.14%
     lat (msec): 2=0.21%, 4=0.14%, 10=0.27%, 20=0.19%, 50=0.15%
     lat (msec): 100=0.07%, 250=0.04%, 500=0.01%, 750=0.01%, 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=11790
  read : io=4,037MiB, bw=160MiB/s, iops=10,222, runt= 25277msec
    clat (usec): min=2, max=143, avg=15.28, stdev= 3.81
    bw (KiB/s) : min=    0, max=245408, per=97.83%, avg=160018.82, stdev=40537.48
  write: io=1,024MiB, bw=49,524KiB/s, iops=3,095, runt= 21173msec
    clat (usec): min=2, max=247, avg=20.03, stdev= 4.08
    bw (KiB/s) : min=    0, max=52416, per=97.51%, avg=48289.49, stdev=7824.06
  cpu          : usr=6.49%, sys=0.87%, ctx=914, majf=0, minf=1114739
  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=258392/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.64%, 20=74.95%, 50=19.39%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17491msec, maxt=17491msec
  WRITE: io=4,096MiB, aggrb=20,398KiB/s, minb=20,398KiB/s, maxb=20,398KiB/s, mint=205618msec, maxt=205618msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25277msec, maxt=25277msec
  WRITE: io=1,024MiB, aggrb=49,524KiB/s, minb=49,524KiB/s, maxb=49,524KiB/s, mint=21173msec, maxt=21173msec

Disk stats (read/write):
  sda: ios=17257/62206, merge=183/1234102, ticks=243455/131159548, in_queue=131402866, util=93.48%
104.64user 52.06system 12:51.88elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390792inputs+18760408outputs (9major+3221098minor)pagefaults 0swaps