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=26394
  read : io=4,096MiB, bw=227MiB/s, iops=14,556, runt= 18009msec
    clat (usec): min=12, max=179, avg=15.35, stdev= 3.02
    bw (KiB/s) : min=    0, max=243360, per=97.31%, avg=226630.05, stdev=45003.40
  write: io=4,096MiB, bw=18,878KiB/s, iops=1,179, runt=222170msec
    clat (usec): min=15, max=735K, avg=644.05, stdev=10718.03
    bw (KiB/s) : min=    0, max=81664, per=107.07%, avg=20211.94, stdev=21486.19
  cpu          : usr=30.42%, sys=3.93%, ctx=17191, 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=50.90%, 50=45.18%, 100=0.65%, 250=1.30%, 500=0.45%
     lat (usec): 750=0.23%, 1000=0.30%
     lat (msec): 2=0.41%, 4=0.08%, 10=0.15%, 20=0.11%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.02%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=26682
  read : io=4,036MiB, bw=155MiB/s, iops=9,897, runt= 26095msec
    clat (usec): min=2, max=1,197, avg=14.72, stdev= 4.51
    bw (KiB/s) : min=    0, max=243904, per=99.05%, avg=156853.82, stdev=43343.41
  write: io=1,024MiB, bw=48,141KiB/s, iops=3,008, runt= 21781msec
    clat (usec): min=3, max=762K, avg=30.68, stdev=2975.26
    bw (KiB/s) : min=    0, max=52128, per=99.42%, avg=47864.05, stdev=9876.83
  cpu          : usr=7.08%, sys=1.07%, ctx=23275, majf=0, minf=1112739
  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=258281/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.79%, 20=78.88%, 50=12.30%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=227MiB/s, minb=227MiB/s, maxb=227MiB/s, mint=18009msec, maxt=18009msec
  WRITE: io=4,096MiB, aggrb=18,878KiB/s, minb=18,878KiB/s, maxb=18,878KiB/s, mint=222170msec, maxt=222170msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26095msec, maxt=26095msec
  WRITE: io=1,024MiB, aggrb=48,143KiB/s, minb=48,143KiB/s, maxb=48,143KiB/s, mint=21781msec, maxt=21781msec

Disk stats (read/write):
  sda: ios=16693/63604, merge=748/1232249, ticks=268347/107350152, in_queue=107618378, util=92.62%
97.82user 49.82system 12:04.14elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390784inputs+18756536outputs (9major+3218912minor)pagefaults 0swaps