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=19406
  read : io=4,096MiB, bw=233MiB/s, iops=14,881, runt= 17616msec
    clat (usec): min=11, max=157, avg=14.93, stdev= 2.62
    bw (KiB/s) : min=    0, max=244768, per=97.22%, avg=231480.89, stdev=40258.62
  write: io=4,096MiB, bw=19,424KiB/s, iops=1,214, runt=215925msec
    clat (usec): min=14, max=820K, avg=627.65, stdev=11249.46
    bw (KiB/s) : min=    0, max=82432, per=109.30%, avg=21230.16, stdev=22803.33
  cpu          : usr=29.82%, sys=3.74%, ctx=49681, 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=51.95%, 50=44.40%, 100=0.39%, 250=1.38%, 500=0.34%
     lat (usec): 750=0.23%, 1000=0.29%
     lat (msec): 2=0.48%, 4=0.07%, 10=0.14%, 20=0.11%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=19683
  read : io=4,039MiB, bw=159MiB/s, iops=10,177, runt= 25397msec
    clat (usec): min=2, max=233, avg=15.23, stdev= 3.78
    bw (KiB/s) : min=    0, max=246624, per=97.73%, avg=159147.92, stdev=41090.61
  write: io=1,024MiB, bw=49,458KiB/s, iops=3,091, runt= 21201msec
    clat (usec): min=2, max=113, avg=19.90, stdev= 3.88
    bw (KiB/s) : min=    0, max=51744, per=97.71%, avg=48326.70, stdev=7912.70
  cpu          : usr=6.71%, sys=1.04%, ctx=22398, majf=0, minf=1114353
  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=258480/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.04%, 20=77.11%, 50=17.83%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17616msec, maxt=17616msec
  WRITE: io=4,096MiB, aggrb=19,424KiB/s, minb=19,424KiB/s, maxb=19,424KiB/s, mint=215925msec, maxt=215925msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25397msec, maxt=25397msec
  WRITE: io=1,024MiB, aggrb=49,460KiB/s, minb=49,460KiB/s, maxb=49,460KiB/s, mint=21201msec, maxt=21201msec

Disk stats (read/write):
  sda: ios=16765/66855, merge=676/1229801, ticks=264532/115756047, in_queue=116020466, util=92.87%
96.03user 50.40system 12:23.11elapsed 19%CPU (0avgtext+0avgdata 16861280maxresident)k
8390640inputs+18763176outputs (8major+3220605minor)pagefaults 0swaps