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=8307
  read : io=4,096MiB, bw=230MiB/s, iops=14,732, runt= 17793msec
    clat (usec): min=11, max=226, avg=15.66, stdev= 1.92
    bw (KiB/s) : min=    0, max=250112, per=97.13%, avg=228974.22, stdev=39469.30
  write: io=4,096MiB, bw=19,437KiB/s, iops=1,214, runt=215782msec
    clat (usec): min=14, max=508K, avg=597.96, stdev=7167.94
    bw (KiB/s) : min=    0, max=81856, per=101.66%, avg=19760.49, stdev=14930.72
  cpu          : usr=32.01%, sys=4.19%, ctx=79728, 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=50.58%, 50=45.78%, 100=0.39%, 250=1.52%, 500=0.43%
     lat (usec): 750=0.14%, 1000=0.15%
     lat (msec): 2=0.23%, 4=0.10%, 10=0.22%, 20=0.17%, 50=0.10%
     lat (msec): 100=0.11%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=8415
  read : io=4,037MiB, bw=163MiB/s, iops=10,400, runt= 24840msec
    clat (usec): min=2, max=241, avg=13.86, stdev= 3.38
    bw (KiB/s) : min=    0, max=236128, per=97.51%, avg=162273.92, stdev=38197.03
  write: io=1,024MiB, bw=50,971KiB/s, iops=3,185, runt= 20572msec
    clat (usec): min=3, max=192, avg=17.66, stdev= 3.56
    bw (KiB/s) : min=    0, max=53152, per=97.66%, avg=49777.52, stdev=8115.74
  cpu          : usr=7.11%, sys=1.13%, ctx=32282, majf=0, minf=1114283
  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=258358/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.35%, 20=82.65%, 50=4.97%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17793msec, maxt=17793msec
  WRITE: io=4,096MiB, aggrb=19,437KiB/s, minb=19,437KiB/s, maxb=19,437KiB/s, mint=215782msec, maxt=215782msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=163MiB/s, minb=163MiB/s, maxb=163MiB/s, mint=24840msec, maxt=24840msec
  WRITE: io=1,024MiB, aggrb=50,972KiB/s, minb=50,972KiB/s, maxb=50,972KiB/s, mint=20572msec, maxt=20572msec

Disk stats (read/write):
  sda: ios=16475/74076, merge=965/1222210, ticks=266794/111032792, in_queue=111299461, util=92.90%
104.46user 56.10system 12:12.25elapsed 21%CPU (0avgtext+0avgdata 16861264maxresident)k
8390384inputs+18766104outputs (7major+3220482minor)pagefaults 0swaps