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=14546
  read : io=4,096MiB, bw=236MiB/s, iops=15,095, runt= 17366msec
    clat (usec): min=11, max=180, avg=14.09, stdev= 2.41
    bw (KiB/s) : min=    0, max=249280, per=97.19%, avg=234757.49, stdev=41259.85
  write: io=4,096MiB, bw=23,304KiB/s, iops=1,456, runt=179982msec
    clat (usec): min=14, max=906K, avg=589.07, stdev=7064.48
    bw (KiB/s) : min=    0, max=88160, per=102.03%, avg=23775.93, stdev=16326.31
  cpu          : usr=19.90%, sys=2.98%, ctx=17938, majf=1, minf=2108624
  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=66.61%, 50=30.02%, 100=0.14%, 250=0.25%, 500=0.13%
     lat (usec): 750=0.17%, 1000=0.20%
     lat (msec): 2=1.16%, 4=0.78%, 10=0.12%, 20=0.12%, 50=0.12%
     lat (msec): 100=0.13%, 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14750
  read : io=4,039MiB, bw=163MiB/s, iops=10,418, runt= 24812msec
    clat (usec): min=2, max=1,374, avg=13.33, stdev= 4.55
    bw (KiB/s) : min=    0, max=246784, per=97.79%, avg=163010.56, stdev=40295.19
  write: io=1,024MiB, bw=50,773KiB/s, iops=3,173, runt= 20652msec
    clat (usec): min=3, max=31,369, avg=18.14, stdev=122.52
    bw (KiB/s) : min=    0, max=52864, per=97.66%, avg=49584.76, stdev=7897.78
  cpu          : usr=7.30%, sys=0.88%, ctx=1627, majf=0, minf=1117084
  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=258498/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.59%, 20=81.77%, 50=4.58%, 100=0.04%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%, 50=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17366msec, maxt=17366msec
  WRITE: io=4,096MiB, aggrb=23,304KiB/s, minb=23,304KiB/s, maxb=23,304KiB/s, mint=179982msec, maxt=179982msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=163MiB/s, minb=163MiB/s, maxb=163MiB/s, mint=24812msec, maxt=24812msec
  WRITE: io=1,024MiB, aggrb=50,775KiB/s, minb=50,775KiB/s, maxb=50,775KiB/s, mint=20652msec, maxt=20652msec

Disk stats (read/write):
  sda: ios=17049/62232, merge=392/1234441, ticks=285095/96860167, in_queue=97145205, util=92.51%
67.37user 32.39system 10:37.55elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390680inputs+18834264outputs (7major+3229404minor)pagefaults 0swaps