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=6166
  read : io=4,096MiB, bw=242MiB/s, iops=15,488, runt= 16925msec
    clat (usec): min=11, max=146, avg=12.39, stdev= 1.59
    bw (KiB/s) : min=    0, max=250208, per=97.15%, avg=240756.71, stdev=42700.41
  write: io=4,096MiB, bw=25,878KiB/s, iops=1,617, runt=162075msec
    clat (usec): min=14, max=5,110K, avg=520.64, stdev=23342.07
    bw (KiB/s) : min=    0, max=86400, per=127.21%, avg=32919.67, stdev=31324.79
  cpu          : usr=22.73%, sys=2.90%, ctx=16591, majf=1, minf=2102312
  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=90.06%, 50=6.60%, 100=0.19%, 250=0.18%, 500=0.23%
     lat (usec): 750=0.34%, 1000=0.40%
     lat (msec): 2=1.27%, 4=0.28%, 10=0.18%, 20=0.08%, 50=0.09%
     lat (msec): 100=0.07%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): >=2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=6341
  read : io=4,037MiB, bw=137MiB/s, iops=8,793, runt= 29378msec
    clat (usec): min=2, max=151, avg=13.86, stdev= 3.31
    bw (KiB/s) : min=    0, max=250848, per=113.00%, avg=158994.90, stdev=47201.35
  write: io=1,024MiB, bw=41,516KiB/s, iops=2,594, runt= 25257msec
    clat (usec): min=3, max=4,621K, avg=89.68, stdev=18051.47
    bw (KiB/s) : min=    0, max=52864, per=116.71%, avg=48452.98, stdev=10550.27
  cpu          : usr=7.10%, sys=0.73%, ctx=837, majf=0, minf=1116770
  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=258348/65536, short=0/0
     lat (usec): 4=0.01%, 10=11.65%, 20=75.30%, 50=13.04%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=242MiB/s, minb=242MiB/s, maxb=242MiB/s, mint=16925msec, maxt=16925msec
  WRITE: io=4,096MiB, aggrb=25,878KiB/s, minb=25,878KiB/s, maxb=25,878KiB/s, mint=162075msec, maxt=162075msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=137MiB/s, minb=137MiB/s, maxb=137MiB/s, mint=29378msec, maxt=29378msec
  WRITE: io=1,024MiB, aggrb=41,516KiB/s, minb=41,516KiB/s, maxb=41,516KiB/s, mint=25257msec, maxt=25257msec

Disk stats (read/write):
  sda: ios=17440/63969, merge=0/1233197, ticks=253672/81505112, in_queue=81758747, util=92.44%
66.91user 26.41system 10:17.75elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8388920inputs+18781392outputs (2major+3222705minor)pagefaults 0swaps