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=21949
  read : io=4,096MiB, bw=231MiB/s, iops=14,792, runt= 17722msec
    clat (usec): min=11, max=122, avg=15.50, stdev= 2.34
    bw (KiB/s) : min=    0, max=246848, per=97.26%, avg=230181.33, stdev=39954.04
  write: io=4,096MiB, bw=19,680KiB/s, iops=1,230, runt=213120msec
    clat (usec): min=14, max=839K, avg=620.22, stdev=10402.75
    bw (KiB/s) : min=    0, max=84416, per=106.91%, avg=21040.37, stdev=23054.38
  cpu          : usr=29.62%, sys=3.62%, ctx=43029, 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=52.12%, 50=44.38%, 100=0.24%, 250=1.32%, 500=0.32%
     lat (usec): 750=0.25%, 1000=0.33%
     lat (msec): 2=0.48%, 4=0.08%, 10=0.14%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=22216
  read : io=4,038MiB, bw=150MiB/s, iops=9,574, runt= 26990msec
    clat (usec): min=2, max=246, avg=15.52, stdev= 3.62
    bw (KiB/s) : min=    0, max=242976, per=102.59%, avg=157162.92, stdev=43474.16
  write: io=1,024MiB, bw=45,933KiB/s, iops=2,870, runt= 22828msec
    clat (usec): min=2, max=1,649K, avg=45.22, stdev=6440.44
    bw (KiB/s) : min=    0, max=51872, per=103.04%, avg=47329.86, stdev=9687.86
  cpu          : usr=6.87%, sys=0.98%, ctx=20191, majf=0, minf=1114463
  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=258407/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.97%, 20=77.75%, 50=17.26%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17722msec, maxt=17722msec
  WRITE: io=4,096MiB, aggrb=19,680KiB/s, minb=19,680KiB/s, maxb=19,680KiB/s, mint=213120msec, maxt=213120msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=150MiB/s, minb=150MiB/s, maxb=150MiB/s, mint=26990msec, maxt=26990msec
  WRITE: io=1,024MiB, aggrb=45,935KiB/s, minb=45,935KiB/s, maxb=45,935KiB/s, mint=22828msec, maxt=22828msec

Disk stats (read/write):
  sda: ios=16756/67243, merge=685/1229114, ticks=263365/110161227, in_queue=110424651, util=92.88%
95.21user 50.49system 12:12.01elapsed 19%CPU (0avgtext+0avgdata 16861296maxresident)k
8390392inputs+18760856outputs (7major+3220672minor)pagefaults 0swaps