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=8635
  read : io=4,096MiB, bw=198MiB/s, iops=12,640, runt= 20739msec
    clat (usec): min=12, max=3,056, avg=17.92, stdev= 8.25
    bw (KiB/s) : min=    0, max=244864, per=97.48%, avg=197155.05, stdev=59387.29
  write: io=4,096MiB, bw=18,429KiB/s, iops=1,151, runt=227584msec
    clat (usec): min=16, max=760K, avg=658.51, stdev=7548.82
    bw (KiB/s) : min=    0, max=66075, per=102.08%, avg=18811.55, stdev=16961.35
  cpu          : usr=30.64%, sys=4.97%, ctx=16776, majf=0, 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=44.71%, 50=48.95%, 100=2.94%, 250=0.41%, 500=1.01%
     lat (usec): 750=0.10%, 1000=0.14%
     lat (msec): 2=0.84%, 4=0.26%, 10=0.16%, 20=0.11%, 50=0.14%
     lat (msec): 100=0.15%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=8749
  read : io=4,036MiB, bw=34,710KiB/s, iops=2,169, runt=119080msec
    clat (usec): min=2, max=628, avg=24.71, stdev=12.95
    bw (KiB/s) : min=    0, max=226208, per=220.39%, avg=76498.36, stdev=68054.14
  write: io=1,024MiB, bw=9,262KiB/s, iops=578, runt=113209msec
    clat (usec): min=4, max=3,739K, avg=1257.28, stdev=52693.30
    bw (KiB/s) : min=    0, max=48960, per=230.41%, avg=21340.65, stdev=19801.22
  cpu          : usr=10.67%, sys=2.50%, ctx=23169, majf=0, minf=1125041
  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=258332/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.44%, 20=33.92%, 50=55.07%, 100=6.50%
     lat (usec): 250=0.04%, 500=0.01%, 750=0.01%
     lat (msec): 2=0.01%, 250=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=198MiB/s, minb=198MiB/s, maxb=198MiB/s, mint=20739msec, maxt=20739msec
  WRITE: io=4,096MiB, aggrb=18,429KiB/s, minb=18,429KiB/s, maxb=18,429KiB/s, mint=227584msec, maxt=227584msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=34,710KiB/s, minb=34,710KiB/s, maxb=34,710KiB/s, mint=119080msec, maxt=119080msec
  WRITE: io=1,024MiB, aggrb=9,262KiB/s, minb=9,262KiB/s, maxb=9,262KiB/s, mint=113209msec, maxt=113209msec

Disk stats (read/write):
  sda: ios=18416/62646, merge=14379/1235794, ticks=247672/54231933, in_queue=54479741, util=92.48%
111.94user 67.01system 11:15.36elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k
8390456inputs+18848448outputs (32major+3231180minor)pagefaults 0swaps