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=6279
  read : io=4,096MiB, bw=227MiB/s, iops=14,524, runt= 18049msec
    clat (usec): min=11, max=3,326, avg=16.03, stdev= 6.90
    bw (KiB/s) : min=    0, max=246496, per=97.30%, avg=226108.54, stdev=39085.56
  write: io=4,096MiB, bw=21,008KiB/s, iops=1,313, runt=199646msec
    clat (usec): min=14, max=814K, avg=563.35, stdev=9415.23
    bw (KiB/s) : min=    0, max=79136, per=105.90%, avg=22247.95, stdev=21602.77
  cpu          : usr=32.03%, sys=4.10%, ctx=49043, 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=50.11%, 50=45.95%, 100=0.67%, 250=1.46%, 500=0.34%
     lat (usec): 750=0.22%, 1000=0.30%
     lat (msec): 2=0.41%, 4=0.08%, 10=0.12%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.07%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=6546
  read : io=4,037MiB, bw=154MiB/s, iops=9,861, runt= 26198msec
    clat (usec): min=2, max=1,089, avg=15.41, stdev= 4.89
    bw (KiB/s) : min=    0, max=240288, per=97.46%, avg=153776.62, stdev=40892.34
  write: io=1,024MiB, bw=48,073KiB/s, iops=3,004, runt= 21812msec
    clat (usec): min=2, max=1,075, avg=19.91, stdev= 6.75
    bw (KiB/s) : min=    0, max=52224, per=97.70%, avg=46968.73, stdev=8853.11
  cpu          : usr=7.07%, sys=1.00%, ctx=10432, majf=0, minf=1113683
  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=258352/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.40%, 20=74.97%, 50=16.57%, 100=0.04%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=227MiB/s, minb=227MiB/s, maxb=227MiB/s, mint=18049msec, maxt=18049msec
  WRITE: io=4,096MiB, aggrb=21,008KiB/s, minb=21,008KiB/s, maxb=21,008KiB/s, mint=199646msec, maxt=199646msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26198msec, maxt=26198msec
  WRITE: io=1,024MiB, aggrb=48,074KiB/s, minb=48,074KiB/s, maxb=48,074KiB/s, mint=21812msec, maxt=21812msec

Disk stats (read/write):
  sda: ios=16703/64497, merge=737/1231712, ticks=228239/115477443, in_queue=115705739, util=92.57%
97.64user 48.98system 11:07.42elapsed 21%CPU (0avgtext+0avgdata 16861296maxresident)k
8390648inputs+18759728outputs (8major+3219839minor)pagefaults 0swaps