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=17766
  read : io=4,096MiB, bw=235MiB/s, iops=15,018, runt= 17455msec
    clat (usec): min=11, max=203, avg=14.18, stdev= 2.43
    bw (KiB/s) : min=    0, max=246016, per=97.17%, avg=233493.94, stdev=41072.26
  write: io=4,096MiB, bw=20,194KiB/s, iops=1,262, runt=207700msec
    clat (usec): min=15, max=838K, avg=565.51, stdev=8120.28
    bw (KiB/s) : min=    0, max=79136, per=103.35%, avg=20869.61, stdev=16385.81
  cpu          : usr=31.80%, sys=4.84%, ctx=46238, majf=1, minf=2102309
  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=50.74%, 50=45.34%, 100=0.56%, 250=1.58%, 500=0.29%
     lat (usec): 750=0.12%, 1000=0.16%
     lat (msec): 2=0.23%, 4=0.14%, 10=0.27%, 20=0.24%, 50=0.20%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=18055
  read : io=4,038MiB, bw=153MiB/s, iops=9,762, runt= 26471msec
    clat (usec): min=2, max=235, avg=15.85, stdev= 3.84
    bw (KiB/s) : min=    0, max=242976, per=99.66%, avg=155673.63, stdev=43154.33
  write: io=1,024MiB, bw=47,127KiB/s, iops=2,945, runt= 22250msec
    clat (usec): min=3, max=944K, avg=34.86, stdev=3688.86
    bw (KiB/s) : min=    0, max=51168, per=100.11%, avg=47180.43, stdev=9875.47
  cpu          : usr=6.57%, sys=0.94%, ctx=934, majf=0, minf=1114263
  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=258435/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.61%, 20=75.28%, 50=20.08%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17455msec, maxt=17455msec
  WRITE: io=4,096MiB, aggrb=20,194KiB/s, minb=20,194KiB/s, maxb=20,194KiB/s, mint=207700msec, maxt=207700msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26471msec, maxt=26471msec
  WRITE: io=1,024MiB, aggrb=47,127KiB/s, minb=47,127KiB/s, maxb=47,127KiB/s, mint=22250msec, maxt=22250msec

Disk stats (read/write):
  sda: ios=17223/62817, merge=219/1233722, ticks=235897/127806091, in_queue=128041859, util=93.27%
103.60user 53.43system 11:48.67elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8390784inputs+18762288outputs (9major+3220567minor)pagefaults 0swaps