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=13998
  read : io=4,096MiB, bw=243MiB/s, iops=15,548, runt= 16860msec
    clat (usec): min=10, max=180, avg=11.99, stdev= 1.66
    bw (KiB/s) : min=    0, max=251456, per=97.14%, avg=241661.18, stdev=42867.80
  write: io=4,096MiB, bw=21,283KiB/s, iops=1,330, runt=197072msec
    clat (usec): min=14, max=491K, avg=655.05, stdev=6722.50
    bw (KiB/s) : min=    0, max=66784, per=102.68%, avg=21853.11, stdev=21410.35
  cpu          : usr=19.09%, sys=2.36%, ctx=17683, majf=0, minf=2102316
  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=91.41%, 50=5.21%, 100=0.10%, 250=0.06%, 500=0.04%
     lat (usec): 750=0.02%, 1000=0.02%
     lat (msec): 2=0.93%, 4=1.60%, 10=0.18%, 20=0.10%, 50=0.14%
     lat (msec): 100=0.15%, 250=0.05%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14184
  read : io=4,037MiB, bw=157MiB/s, iops=10,075, runt= 25644msec
    clat (usec): min=2, max=113, avg=16.64, stdev= 4.18
    bw (KiB/s) : min=    0, max=235328, per=97.74%, avg=157564.24, stdev=39024.33
  write: io=1,024MiB, bw=49,058KiB/s, iops=3,066, runt= 21374msec
    clat (usec): min=2, max=116, avg=21.61, stdev= 4.23
    bw (KiB/s) : min=    0, max=51328, per=97.67%, avg=47915.86, stdev=7548.50
  cpu          : usr=7.74%, sys=1.11%, ctx=931, majf=0, minf=1114810
  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=258379/65536, short=0/0
     lat (usec): 4=0.01%, 10=11.95%, 20=53.03%, 50=35.01%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=243MiB/s, minb=243MiB/s, maxb=243MiB/s, mint=16860msec, maxt=16860msec
  WRITE: io=4,096MiB, aggrb=21,283KiB/s, minb=21,283KiB/s, maxb=21,283KiB/s, mint=197072msec, maxt=197072msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25644msec, maxt=25644msec
  WRITE: io=1,024MiB, aggrb=49,060KiB/s, minb=49,060KiB/s, maxb=49,060KiB/s, mint=21374msec, maxt=21374msec

Disk stats (read/write):
  sda: ios=17444/63091, merge=0/1234104, ticks=213846/82239344, in_queue=82453174, util=92.39%
66.87user 27.98system 10:30.82elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390672inputs+18767376outputs (32major+3220757minor)pagefaults 0swaps