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=15089
  read : io=4,096MiB, bw=227MiB/s, iops=14,553, runt= 18012msec
    clat (usec): min=11, max=104, avg=16.51, stdev= 1.71
    bw (KiB/s) : min=    0, max=246048, per=97.30%, avg=226588.54, stdev=38473.06
  write: io=4,096MiB, bw=19,423KiB/s, iops=1,213, runt=215936msec
    clat (usec): min=13, max=771K, avg=607.08, stdev=7469.26
    bw (KiB/s) : min=    0, max=81888, per=102.06%, avg=19823.30, stdev=16405.85
  cpu          : usr=30.90%, sys=3.87%, ctx=50308, 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=50.78%, 50=45.69%, 100=0.26%, 250=1.50%, 500=0.31%
     lat (usec): 750=0.17%, 1000=0.20%
     lat (msec): 2=0.31%, 4=0.10%, 10=0.22%, 20=0.17%, 50=0.10%
     lat (msec): 100=0.10%, 250=0.08%, 500=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=15172
  read : io=4,038MiB, bw=156MiB/s, iops=9,991, runt= 25864msec
    clat (usec): min=2, max=234, avg=16.56, stdev= 3.38
    bw (KiB/s) : min=    0, max=238368, per=97.47%, avg=155825.85, stdev=39979.84
  write: io=1,024MiB, bw=48,725KiB/s, iops=3,045, runt= 21520msec
    clat (usec): min=6, max=106, avg=20.90, stdev= 3.72
    bw (KiB/s) : min=    0, max=52096, per=97.77%, avg=47640.61, stdev=8267.40
  cpu          : usr=7.97%, sys=1.31%, ctx=50477, majf=0, minf=1114099
  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=1.52%, 20=75.26%, 50=23.20%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=227MiB/s, minb=227MiB/s, maxb=227MiB/s, mint=18012msec, maxt=18012msec
  WRITE: io=4,096MiB, aggrb=19,423KiB/s, minb=19,423KiB/s, maxb=19,423KiB/s, mint=215936msec, maxt=215936msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25864msec, maxt=25864msec
  WRITE: io=1,024MiB, aggrb=48,726KiB/s, minb=48,726KiB/s, maxb=48,726KiB/s, mint=21520msec, maxt=21520msec

Disk stats (read/write):
  sda: ios=16496/70868, merge=945/1225624, ticks=269168/99784532, in_queue=100053570, util=92.51%
102.90user 56.54system 11:56.89elapsed 22%CPU (0avgtext+0avgdata 16861104maxresident)k
8390776inputs+18774288outputs (9major+3220208minor)pagefaults 0swaps