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=17662
  read : io=4,096MiB, bw=239MiB/s, iops=15,288, runt= 17146msec
    clat (usec): min=10, max=178, avg=13.11, stdev= 2.05
    bw (KiB/s) : min=    0, max=247392, per=97.19%, avg=237762.74, stdev=41640.93
  write: io=4,096MiB, bw=19,419KiB/s, iops=1,213, runt=215980msec
    clat (usec): min=13, max=579K, avg=605.64, stdev=7284.51
    bw (KiB/s) : min=    0, max=87296, per=101.89%, avg=19785.38, stdev=15894.01
  cpu          : usr=31.00%, sys=3.97%, ctx=63910, majf=1, minf=2102311
  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=52.46%, 50=43.95%, 100=0.33%, 250=1.55%, 500=0.31%
     lat (usec): 750=0.15%, 1000=0.17%
     lat (msec): 2=0.29%, 4=0.11%, 10=0.21%, 20=0.17%, 50=0.11%
     lat (msec): 100=0.11%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17774
  read : io=4,038MiB, bw=163MiB/s, iops=10,423, runt= 24793msec
    clat (usec): min=2, max=157, avg=13.95, stdev= 3.32
    bw (KiB/s) : min=    0, max=242304, per=97.54%, avg=162673.92, stdev=37970.12
  write: io=1,024MiB, bw=51,067KiB/s, iops=3,191, runt= 20533msec
    clat (usec): min=3, max=188, avg=17.76, stdev= 3.47
    bw (KiB/s) : min=    0, max=53632, per=97.67%, avg=49878.10, stdev=7953.12
  cpu          : usr=6.55%, sys=0.90%, ctx=5017, majf=0, minf=1113862
  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=258425/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.07%, 20=83.00%, 50=4.90%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17146msec, maxt=17146msec
  WRITE: io=4,096MiB, aggrb=19,419KiB/s, minb=19,419KiB/s, maxb=19,419KiB/s, mint=215980msec, maxt=215980msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=163MiB/s, minb=163MiB/s, maxb=163MiB/s, mint=24793msec, maxt=24793msec
  WRITE: io=1,024MiB, aggrb=51,069KiB/s, minb=51,069KiB/s, maxb=51,069KiB/s, mint=20533msec, maxt=20533msec

Disk stats (read/write):
  sda: ios=16480/65580, merge=962/1230807, ticks=270119/124618542, in_queue=124888568, util=93.28%
101.55user 54.93system 12:31.62elapsed 20%CPU (0avgtext+0avgdata 16861616maxresident)k
8390648inputs+18794864outputs (8major+3220152minor)pagefaults 0swaps