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=13861
  read : io=4,096MiB, bw=235MiB/s, iops=15,013, runt= 17461msec
    clat (usec): min=11, max=146, avg=14.22, stdev= 2.41
    bw (KiB/s) : min=    0, max=246624, per=97.08%, avg=233198.63, stdev=41104.56
  write: io=4,096MiB, bw=19,802KiB/s, iops=1,237, runt=211812msec
    clat (usec): min=14, max=717K, avg=576.44, stdev=8421.25
    bw (KiB/s) : min=    0, max=82432, per=104.11%, avg=20615.71, stdev=16693.48
  cpu          : usr=30.69%, sys=4.49%, ctx=50099, 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=50.21%, 50=45.72%, 100=0.73%, 250=1.65%, 500=0.25%
     lat (usec): 750=0.10%, 1000=0.13%
     lat (msec): 2=0.21%, 4=0.16%, 10=0.29%, 20=0.23%, 50=0.18%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14137
  read : io=4,037MiB, bw=152MiB/s, iops=9,696, runt= 26647msec
    clat (usec): min=2, max=247, avg=14.73, stdev= 3.74
    bw (KiB/s) : min=    0, max=244672, per=101.13%, avg=156905.12, stdev=45213.71
  write: io=1,024MiB, bw=46,586KiB/s, iops=2,911, runt= 22508msec
    clat (usec): min=3, max=1,360K, avg=39.61, stdev=5313.40
    bw (KiB/s) : min=    0, max=52096, per=101.54%, avg=47305.41, stdev=10565.21
  cpu          : usr=6.53%, sys=0.84%, ctx=5181, majf=0, minf=1114371
  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=258382/65536, short=0/0
     lat (usec): 4=0.01%, 10=7.02%, 20=79.72%, 50=13.23%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17461msec, maxt=17461msec
  WRITE: io=4,096MiB, aggrb=19,802KiB/s, minb=19,802KiB/s, maxb=19,802KiB/s, mint=211812msec, maxt=211812msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=152MiB/s, minb=152MiB/s, maxb=152MiB/s, mint=26647msec, maxt=26647msec
  WRITE: io=1,024MiB, aggrb=46,587KiB/s, minb=46,587KiB/s, maxb=46,587KiB/s, mint=22508msec, maxt=22508msec

Disk stats (read/write):
  sda: ios=17233/63869, merge=207/1232457, ticks=254062/128994802, in_queue=129248741, util=93.53%
105.72user 51.60system 13:06.16elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390792inputs+18760568outputs (9major+3220750minor)pagefaults 0swaps