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=3316
  read : io=4,096MiB, bw=237MiB/s, iops=15,173, runt= 17276msec
    clat (usec): min=10, max=112, avg=13.78, stdev= 1.55
    bw (KiB/s) : min=    0, max=251520, per=97.16%, avg=235890.29, stdev=41220.95
  write: io=4,096MiB, bw=20,757KiB/s, iops=1,297, runt=202061msec
    clat (usec): min=13, max=892K, avg=673.83, stdev=10300.65
    bw (KiB/s) : min=    0, max=88064, per=106.52%, avg=22109.40, stdev=17692.05
  cpu          : usr=18.83%, sys=2.14%, ctx=108177, majf=1, minf=2102311
  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=93.89%, 50=2.79%, 100=0.17%, 250=0.18%, 500=0.07%
     lat (usec): 750=0.11%, 1000=0.13%
     lat (msec): 2=1.01%, 4=1.03%, 10=0.16%, 20=0.17%, 50=0.10%
     lat (msec): 100=0.13%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=3405
  read : io=4,038MiB, bw=154MiB/s, iops=9,876, runt= 26168msec
    clat (usec): min=2, max=176, avg=13.31, stdev= 3.14
    bw (KiB/s) : min=    0, max=247616, per=102.69%, avg=162272.10, stdev=44915.90
  write: io=1,024MiB, bw=47,414KiB/s, iops=2,963, runt= 22115msec
    clat (usec): min=3, max=1,576K, avg=41.37, stdev=6156.06
    bw (KiB/s) : min=    0, max=52864, per=103.00%, avg=48839.57, stdev=9844.97
  cpu          : usr=6.43%, sys=0.63%, ctx=890, majf=0, minf=1114588
  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=258440/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.83%, 20=82.12%, 50=5.03%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17276msec, maxt=17276msec
  WRITE: io=4,096MiB, aggrb=20,757KiB/s, minb=20,757KiB/s, maxb=20,757KiB/s, mint=202061msec, maxt=202061msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26168msec, maxt=26168msec
  WRITE: io=1,024MiB, aggrb=47,416KiB/s, minb=47,416KiB/s, maxb=47,416KiB/s, mint=22115msec, maxt=22115msec

Disk stats (read/write):
  sda: ios=16589/67154, merge=853/1229377, ticks=262480/124603736, in_queue=124866161, util=93.43%
67.26user 31.69system 12:06.51elapsed 13%CPU (0avgtext+0avgdata 16861648maxresident)k
8390848inputs+18762320outputs (8major+3220818minor)pagefaults 0swaps