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=12111
  read : io=4,096MiB, bw=237MiB/s, iops=15,158, runt= 17293msec
    clat (usec): min=11, max=142, avg=13.65, stdev= 2.37
    bw (KiB/s) : min=    0, max=248512, per=97.22%, avg=235805.26, stdev=41578.23
  write: io=4,096MiB, bw=19,500KiB/s, iops=1,218, runt=215087msec
    clat (usec): min=14, max=854K, avg=623.46, stdev=10638.48
    bw (KiB/s) : min=    0, max=87360, per=107.60%, avg=20982.87, stdev=22257.26
  cpu          : usr=29.93%, sys=3.66%, ctx=33649, 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=52.57%, 50=43.78%, 100=0.38%, 250=1.29%, 500=0.39%
     lat (usec): 750=0.24%, 1000=0.29%
     lat (msec): 2=0.46%, 4=0.09%, 10=0.15%, 20=0.13%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12376
  read : io=4,037MiB, bw=154MiB/s, iops=9,840, runt= 26255msec
    clat (usec): min=2, max=239, avg=14.70, stdev= 3.82
    bw (KiB/s) : min=    0, max=243328, per=98.70%, avg=155390.00, stdev=45145.81
  write: io=1,024MiB, bw=47,593KiB/s, iops=2,974, runt= 22032msec
    clat (usec): min=3, max=681K, avg=29.26, stdev=2659.07
    bw (KiB/s) : min=    0, max=52256, per=98.80%, avg=47024.36, stdev=10801.44
  cpu          : usr=7.23%, sys=1.09%, ctx=13935, majf=0, minf=1113785
  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=258354/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.09%, 20=78.23%, 50=12.65%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17293msec, maxt=17293msec
  WRITE: io=4,096MiB, aggrb=19,500KiB/s, minb=19,500KiB/s, maxb=19,500KiB/s, mint=215087msec, maxt=215087msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26255msec, maxt=26255msec
  WRITE: io=1,024MiB, aggrb=47,594KiB/s, minb=47,594KiB/s, maxb=47,594KiB/s, mint=22032msec, maxt=22032msec

Disk stats (read/write):
  sda: ios=16707/64900, merge=733/1231257, ticks=267523/107593720, in_queue=107861149, util=92.66%
96.11user 53.25system 12:01.33elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390384inputs+18759144outputs (7major+3219934minor)pagefaults 0swaps