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=10354
  read : io=4,096MiB, bw=229MiB/s, iops=14,669, runt= 17870msec
    clat (usec): min=11, max=822, avg=15.90, stdev= 2.90
    bw (KiB/s) : min=    0, max=244192, per=97.27%, avg=228315.56, stdev=39608.42
  write: io=4,096MiB, bw=20,472KiB/s, iops=1,279, runt=204880msec
    clat (usec): min=14, max=747K, avg=579.13, stdev=9676.22
    bw (KiB/s) : min=    0, max=79520, per=104.79%, avg=21453.42, stdev=21121.83
  cpu          : usr=31.95%, sys=4.31%, ctx=40706, 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=50.42%, 50=45.42%, 100=0.90%, 250=1.40%, 500=0.41%
     lat (usec): 750=0.23%, 1000=0.33%
     lat (msec): 2=0.35%, 4=0.08%, 10=0.13%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=10595
  read : io=4,036MiB, bw=157MiB/s, iops=10,055, runt= 25692msec
    clat (usec): min=2, max=3,066, avg=15.33, stdev= 7.54
    bw (KiB/s) : min=    0, max=242784, per=97.52%, avg=156891.61, stdev=38069.68
  write: io=1,024MiB, bw=49,065KiB/s, iops=3,066, runt= 21371msec
    clat (usec): min=3, max=1,407, avg=20.07, stdev= 7.53
    bw (KiB/s) : min=    0, max=51552, per=97.61%, avg=47894.33, stdev=7775.91
  cpu          : usr=6.89%, sys=1.02%, ctx=10812, majf=0, minf=1113703
  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=258334/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.85%, 20=75.06%, 50=18.01%, 100=0.05%
     lat (usec): 250=0.02%, 500=0.01%
     lat (msec): 2=0.01%, 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=229MiB/s, minb=229MiB/s, maxb=229MiB/s, mint=17870msec, maxt=17870msec
  WRITE: io=4,096MiB, aggrb=20,472KiB/s, minb=20,472KiB/s, maxb=20,472KiB/s, mint=204880msec, maxt=204880msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25692msec, maxt=25692msec
  WRITE: io=1,024MiB, aggrb=49,067KiB/s, minb=49,067KiB/s, maxb=49,067KiB/s, mint=21371msec, maxt=21371msec

Disk stats (read/write):
  sda: ios=16709/64078, merge=732/1231992, ticks=233883/115694599, in_queue=115928429, util=92.69%
97.96user 47.67system 11:11.91elapsed 21%CPU (0avgtext+0avgdata 16861328maxresident)k
8391080inputs+18758608outputs (9major+3219875minor)pagefaults 0swaps