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=17080
  read : io=4,096MiB, bw=232MiB/s, iops=14,874, runt= 17624msec
    clat (usec): min=11, max=462, avg=13.36, stdev= 2.82
    bw (KiB/s) : min=    0, max=248864, per=97.24%, avg=231438.22, stdev=50551.02
  write: io=4,096MiB, bw=18,139KiB/s, iops=1,133, runt=231228msec
    clat (usec): min=12, max=664K, avg=675.22, stdev=7299.35
    bw (KiB/s) : min=    0, max=66560, per=102.63%, avg=18616.17, stdev=17958.96
  cpu          : usr=29.28%, sys=3.41%, ctx=15586, majf=0, minf=2102340
  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=59.84%, 50=36.47%, 100=0.34%, 250=1.01%, 500=0.26%
     lat (usec): 750=0.08%, 1000=0.12%
     lat (msec): 2=0.89%, 4=0.27%, 10=0.21%, 20=0.13%, 50=0.17%
     lat (msec): 100=0.15%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17096
  read : io=4,038MiB, bw=35,680KiB/s, iops=2,230, runt=115890msec
    clat (usec): min=2, max=1,608, avg=19.78, stdev= 9.61
    bw (KiB/s) : min=    0, max=240640, per=237.56%, avg=84760.73, stdev=78680.11
  write: io=1,024MiB, bw=9,419KiB/s, iops=588, runt=111316msec
    clat (usec): min=2, max=3,794K, avg=1266.40, stdev=54831.65
    bw (KiB/s) : min=    0, max=51232, per=243.52%, avg=22937.05, stdev=21821.72
  cpu          : usr=9.68%, sys=1.59%, ctx=5322, majf=0, minf=1128670
  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=258436/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.14%, 20=45.27%, 50=53.36%, 100=0.13%
     lat (usec): 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 50=0.01%, 500=0.01%, 1000=0.01%, 2000=0.01%
     lat (msec): >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17624msec, maxt=17624msec
  WRITE: io=4,096MiB, aggrb=18,139KiB/s, minb=18,139KiB/s, maxb=18,139KiB/s, mint=231228msec, maxt=231228msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=35,680KiB/s, minb=35,680KiB/s, maxb=35,680KiB/s, mint=115890msec, maxt=115890msec
  WRITE: io=1,024MiB, aggrb=9,419KiB/s, minb=9,419KiB/s, maxb=9,419KiB/s, mint=111316msec, maxt=111316msec

Disk stats (read/write):
  sda: ios=18424/63053, merge=14372/1235915, ticks=251008/54939012, in_queue=55189984, util=93.80%
105.81user 47.07system 11:22.56elapsed 22%CPU (0avgtext+0avgdata 0maxresident)k
8389552inputs+18873880outputs (27major+3234833minor)pagefaults 0swaps