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=17498
  read : io=4,096MiB, bw=234MiB/s, iops=14,989, runt= 17489msec
    clat (usec): min=11, max=147, avg=14.27, stdev= 2.38
    bw (KiB/s) : min=    0, max=246432, per=97.09%, avg=232845.71, stdev=40993.14
  write: io=4,096MiB, bw=20,574KiB/s, iops=1,285, runt=203856msec
    clat (usec): min=15, max=873K, avg=548.27, stdev=8646.38
    bw (KiB/s) : min=    0, max=81120, per=104.53%, avg=21506.07, stdev=16837.65
  cpu          : usr=32.94%, sys=4.99%, ctx=34712, 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=49.94%, 50=45.79%, 100=0.94%, 250=1.46%, 500=0.48%
     lat (usec): 750=0.12%, 1000=0.15%
     lat (msec): 2=0.21%, 4=0.14%, 10=0.29%, 20=0.20%, 50=0.16%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17772
  read : io=4,038MiB, bw=159MiB/s, iops=10,201, runt= 25332msec
    clat (usec): min=2, max=228, avg=15.39, stdev= 3.99
    bw (KiB/s) : min=    0, max=243840, per=97.75%, avg=159567.69, stdev=39733.57
  write: io=1,024MiB, bw=49,552KiB/s, iops=3,097, runt= 21161msec
    clat (usec): min=3, max=156, avg=19.88, stdev= 4.45
    bw (KiB/s) : min=    0, max=52096, per=97.53%, avg=48331.91, stdev=7884.76
  cpu          : usr=6.59%, sys=0.92%, ctx=8317, majf=0, minf=1114271
  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=258431/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.64%, 20=77.46%, 50=16.83%, 100=0.05%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17489msec, maxt=17489msec
  WRITE: io=4,096MiB, aggrb=20,574KiB/s, minb=20,574KiB/s, maxb=20,574KiB/s, mint=203856msec, maxt=203856msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25332msec, maxt=25332msec
  WRITE: io=1,024MiB, aggrb=49,554KiB/s, minb=49,554KiB/s, maxb=49,554KiB/s, mint=21161msec, maxt=21161msec

Disk stats (read/write):
  sda: ios=17239/63656, merge=202/1232796, ticks=230858/124953866, in_queue=125184604, util=93.23%
105.06user 53.02system 11:45.52elapsed 22%CPU (0avgtext+0avgdata 16861712maxresident)k
8390920inputs+18761624outputs (8major+3220555minor)pagefaults 0swaps