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=1047
  read : io=4,096MiB, bw=234MiB/s, iops=15,004, runt= 17471msec
    clat (usec): min=11, max=107, avg=14.52, stdev= 1.89
    bw (KiB/s) : min=    0, max=247424, per=97.20%, avg=233350.40, stdev=40988.47
  write: io=4,096MiB, bw=18,248KiB/s, iops=1,140, runt=229839msec
    clat (usec): min=15, max=616K, avg=778.90, stdev=7733.08
    bw (KiB/s) : min=    0, max=66496, per=102.22%, avg=18653.44, stdev=16538.03
  cpu          : usr=17.92%, sys=2.26%, ctx=18293, 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=64.50%, 50=32.15%, 100=0.02%, 250=0.07%, 500=0.04%
     lat (usec): 750=0.08%, 1000=0.03%
     lat (msec): 2=1.00%, 4=1.34%, 10=0.23%, 20=0.16%, 50=0.14%
     lat (msec): 100=0.18%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=1273
  read : io=4,037MiB, bw=36,590KiB/s, iops=2,286, runt=112985msec
    clat (usec): min=2, max=611, avg=16.91, stdev= 5.07
    bw (KiB/s) : min=    0, max=235776, per=243.54%, avg=89112.87, stdev=80243.63
  write: io=1,024MiB, bw=9,455KiB/s, iops=590, runt=110901msec
    clat (usec): min=3, max=3,748K, avg=1385.47, stdev=59982.97
    bw (KiB/s) : min=    0, max=50752, per=253.65%, avg=23982.94, stdev=22710.49
  cpu          : usr=7.06%, sys=1.30%, ctx=17971, majf=0, minf=1123613
  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=258386/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.18%, 20=44.98%, 50=41.77%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): 500=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17471msec, maxt=17471msec
  WRITE: io=4,096MiB, aggrb=18,248KiB/s, minb=18,248KiB/s, maxb=18,248KiB/s, mint=229839msec, maxt=229839msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=36,590KiB/s, minb=36,590KiB/s, maxb=36,590KiB/s, mint=112985msec, maxt=112985msec
  WRITE: io=1,024MiB, aggrb=9,455KiB/s, minb=9,455KiB/s, maxb=9,455KiB/s, mint=110901msec, maxt=110901msec

Disk stats (read/write):
  sda: ios=18422/62058, merge=14374/1235932, ticks=262686/54519121, in_queue=54781794, util=94.12%
67.57user 32.38system 11:11.65elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
8390824inputs+18834448outputs (33major+3229749minor)pagefaults 0swaps