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=13148
  read : io=4,096MiB, bw=239MiB/s, iops=15,269, runt= 17168msec
    clat (usec): min=10, max=143, avg=13.20, stdev= 1.82
    bw (KiB/s) : min=    0, max=247904, per=97.20%, avg=237457.37, stdev=41494.95
  write: io=4,096MiB, bw=19,109KiB/s, iops=1,194, runt=219492msec
    clat (usec): min=14, max=536K, avg=611.85, stdev=7456.60
    bw (KiB/s) : min=    0, max=84384, per=101.87%, avg=19466.18, stdev=15125.99
  cpu          : usr=31.31%, sys=4.16%, ctx=69198, majf=1, minf=2102311
  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=50.91%, 50=45.48%, 100=0.35%, 250=1.65%, 500=0.31%
     lat (usec): 750=0.16%, 1000=0.15%
     lat (msec): 2=0.23%, 4=0.09%, 10=0.21%, 20=0.17%, 50=0.11%
     lat (msec): 100=0.11%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=13228
  read : io=4,038MiB, bw=161MiB/s, iops=10,277, runt= 25143msec
    clat (usec): min=2, max=220, avg=13.94, stdev= 3.36
    bw (KiB/s) : min=    0, max=237344, per=97.62%, avg=160535.04, stdev=39562.75
  write: io=1,024MiB, bw=50,168KiB/s, iops=3,135, runt= 20901msec
    clat (usec): min=3, max=232, avg=18.08, stdev= 3.77
    bw (KiB/s) : min=    0, max=52960, per=97.62%, avg=48978.29, stdev=8306.57
  cpu          : usr=7.38%, sys=1.14%, ctx=31991, majf=0, minf=1114143
  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=258411/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.32%, 20=81.29%, 50=6.37%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17168msec, maxt=17168msec
  WRITE: io=4,096MiB, aggrb=19,109KiB/s, minb=19,109KiB/s, maxb=19,109KiB/s, mint=219492msec, maxt=219492msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25143msec, maxt=25143msec
  WRITE: io=1,024MiB, aggrb=50,170KiB/s, minb=50,170KiB/s, maxb=50,170KiB/s, mint=20901msec, maxt=20901msec

Disk stats (read/write):
  sda: ios=16486/72604, merge=955/1223787, ticks=270322/106546440, in_queue=106816627, util=92.79%
103.91user 47.28system 12:03.75elapsed 20%CPU (0avgtext+0avgdata 16861104maxresident)k
8390776inputs+18760888outputs (9major+3220317minor)pagefaults 0swaps