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=20051
  read : io=4,096MiB, bw=235MiB/s, iops=15,013, runt= 17460msec
    clat (usec): min=11, max=143, avg=14.27, stdev= 2.51
    bw (KiB/s) : min=    0, max=247008, per=97.08%, avg=233212.34, stdev=41191.06
  write: io=4,096MiB, bw=20,483KiB/s, iops=1,280, runt=204761msec
    clat (usec): min=15, max=845K, avg=553.44, stdev=8185.32
    bw (KiB/s) : min=    0, max=79200, per=103.79%, avg=21258.34, stdev=16566.05
  cpu          : usr=32.21%, sys=4.99%, ctx=50224, 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=49.93%, 50=45.76%, 100=0.97%, 250=1.56%, 500=0.36%
     lat (usec): 750=0.12%, 1000=0.14%
     lat (msec): 2=0.20%, 4=0.14%, 10=0.28%, 20=0.25%, 50=0.18%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20308
  read : io=4,035MiB, bw=155MiB/s, iops=9,934, runt= 25996msec
    clat (usec): min=2, max=342, avg=15.46, stdev= 4.07
    bw (KiB/s) : min=    0, max=245312, per=97.99%, avg=155773.08, stdev=42813.53
  write: io=1,024MiB, bw=48,130KiB/s, iops=3,008, runt= 21786msec
    clat (usec): min=2, max=439K, avg=26.72, stdev=1715.24
    bw (KiB/s) : min=    0, max=51584, per=97.86%, avg=47103.09, stdev=9461.10
  cpu          : usr=6.80%, sys=0.91%, ctx=2264, majf=0, minf=1113023
  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=258269/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.62%, 20=78.09%, 50=16.23%, 100=0.04%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17460msec, maxt=17460msec
  WRITE: io=4,096MiB, aggrb=20,483KiB/s, minb=20,483KiB/s, maxb=20,483KiB/s, mint=204761msec, maxt=204761msec

Run status group 1 (all jobs):
   READ: io=4,035MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=25996msec, maxt=25996msec
  WRITE: io=1,024MiB, aggrb=48,132KiB/s, minb=48,132KiB/s, maxb=48,132KiB/s, mint=21786msec, maxt=21786msec

Disk stats (read/write):
  sda: ios=17237/64319, merge=205/1231485, ticks=228984/123619580, in_queue=123848441, util=93.18%
104.58user 52.52system 11:39.21elapsed 22%CPU (0avgtext+0avgdata 16861712maxresident)k
8390792inputs+18756400outputs (9major+3219285minor)pagefaults 0swaps