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=12203
  read : io=4,096MiB, bw=226MiB/s, iops=14,463, runt= 18125msec
    clat (usec): min=12, max=179, avg=16.75, stdev= 2.65
    bw (KiB/s) : min=    0, max=237984, per=97.29%, avg=225134.70, stdev=38544.10
  write: io=4,096MiB, bw=19,791KiB/s, iops=1,236, runt=211925msec
    clat (usec): min=17, max=804K, avg=568.86, stdev=7165.30
    bw (KiB/s) : min=    0, max=79008, per=102.05%, avg=20195.94, stdev=12917.21
  cpu          : usr=31.44%, sys=5.30%, ctx=121738, majf=1, minf=2102343
  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=43.37%, 50=51.01%, 100=2.29%, 250=1.91%, 500=0.20%
     lat (usec): 750=0.08%, 1000=0.09%
     lat (msec): 2=0.13%, 4=0.14%, 10=0.26%, 20=0.21%, 50=0.17%
     lat (msec): 100=0.10%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12295
  read : io=4,038MiB, bw=156MiB/s, iops=9,973, runt= 25914msec
    clat (usec): min=2, max=187, avg=17.44, stdev= 5.59
    bw (KiB/s) : min=    0, max=235552, per=98.08%, avg=156518.15, stdev=35382.48
  write: io=1,024MiB, bw=49,115KiB/s, iops=3,069, runt= 21349msec
    clat (usec): min=3, max=263, avg=20.96, stdev= 4.48
    bw (KiB/s) : min=    0, max=51360, per=97.75%, avg=48011.88, stdev=7555.44
  cpu          : usr=6.28%, sys=1.20%, ctx=3910, majf=0, minf=1114289
  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=258451/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.65%, 20=50.81%, 50=40.52%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=226MiB/s, minb=226MiB/s, maxb=226MiB/s, mint=18125msec, maxt=18125msec
  WRITE: io=4,096MiB, aggrb=19,791KiB/s, minb=19,791KiB/s, maxb=19,791KiB/s, mint=211925msec, maxt=211925msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25914msec, maxt=25914msec
  WRITE: io=1,024MiB, aggrb=49,116KiB/s, minb=49,116KiB/s, maxb=49,116KiB/s, mint=21349msec, maxt=21349msec

Disk stats (read/write):
  sda: ios=16596/73200, merge=845/1223414, ticks=261355/131679336, in_queue=131940698, util=93.25%
107.66user 49.82system 13:02.86elapsed 20%CPU (0avgtext+0avgdata 16861120maxresident)k
8390640inputs+18763048outputs (8major+3220739minor)pagefaults 0swaps