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=14688
  read : io=4,096MiB, bw=231MiB/s, iops=14,802, runt= 17709msec
    clat (usec): min=11, max=257, avg=14.72, stdev= 2.81
    bw (KiB/s) : min=    0, max=246336, per=97.18%, avg=230169.78, stdev=41047.42
  write: io=4,096MiB, bw=21,074KiB/s, iops=1,317, runt=199022msec
    clat (usec): min=15, max=771K, avg=560.84, stdev=9608.92
    bw (KiB/s) : min=    0, max=79808, per=105.49%, avg=22231.51, stdev=21809.98
  cpu          : usr=31.48%, sys=4.54%, ctx=79204, 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=50.05%, 50=46.07%, 100=0.61%, 250=1.38%, 500=0.43%
     lat (usec): 750=0.24%, 1000=0.34%
     lat (msec): 2=0.37%, 4=0.06%, 10=0.12%, 20=0.10%, 50=0.07%
     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=14953
  read : io=4,038MiB, bw=151MiB/s, iops=9,654, runt= 26769msec
    clat (usec): min=2, max=3,061, avg=15.37, stdev= 9.21
    bw (KiB/s) : min=    0, max=245984, per=97.60%, avg=150755.74, stdev=40703.33
  write: io=1,024MiB, bw=47,101KiB/s, iops=2,943, runt= 22262msec
    clat (usec): min=3, max=483K, avg=27.78, stdev=1887.97
    bw (KiB/s) : min=    0, max=52032, per=98.47%, avg=46383.07, stdev=9434.83
  cpu          : usr=6.99%, sys=1.04%, ctx=17016, majf=0, minf=1114015
  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=258432/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.51%, 20=73.11%, 50=20.29%, 100=0.06%
     lat (usec): 250=0.01%, 500=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 4=0.01%, 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17709msec, maxt=17709msec
  WRITE: io=4,096MiB, aggrb=21,074KiB/s, minb=21,074KiB/s, maxb=21,074KiB/s, mint=199022msec, maxt=199022msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=151MiB/s, minb=151MiB/s, maxb=151MiB/s, mint=26769msec, maxt=26769msec
  WRITE: io=1,024MiB, aggrb=47,102KiB/s, minb=47,102KiB/s, maxb=47,102KiB/s, mint=22262msec, maxt=22262msec

Disk stats (read/write):
  sda: ios=16735/71394, merge=706/1225046, ticks=230590/114649808, in_queue=114880272, util=92.71%
97.33user 46.21system 11:16.22elapsed 21%CPU (0avgtext+0avgdata 16861312maxresident)k
8391056inputs+18761392outputs (9major+3220198minor)pagefaults 0swaps