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=11497
  read : io=4,096MiB, bw=230MiB/s, iops=14,737, runt= 17787msec
    clat (usec): min=11, max=1,936, avg=14.23, stdev= 5.13
    bw (KiB/s) : min=    0, max=245376, per=97.16%, avg=229127.11, stdev=42680.93
  write: io=4,096MiB, bw=20,295KiB/s, iops=1,268, runt=206666msec
    clat (usec): min=15, max=915K, avg=587.09, stdev=9811.99
    bw (KiB/s) : min=    0, max=78816, per=105.34%, avg=21377.92, stdev=20143.67
  cpu          : usr=31.91%, sys=3.99%, ctx=23516, 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=50.01%, 50=45.78%, 100=0.95%, 250=1.43%, 500=0.40%
     lat (usec): 750=0.21%, 1000=0.28%
     lat (msec): 2=0.38%, 4=0.08%, 10=0.13%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=11762
  read : io=4,039MiB, bw=154MiB/s, iops=9,880, runt= 26160msec
    clat (usec): min=2, max=241, avg=14.94, stdev= 3.83
    bw (KiB/s) : min=    0, max=243936, per=97.97%, avg=154875.10, stdev=43879.65
  write: io=1,024MiB, bw=47,601KiB/s, iops=2,975, runt= 22028msec
    clat (usec): min=3, max=307K, avg=27.46, stdev=1396.76
    bw (KiB/s) : min=    0, max=51840, per=97.69%, avg=46502.52, stdev=9245.54
  cpu          : usr=6.80%, sys=0.88%, ctx=5954, majf=0, minf=1114273
  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=258470/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.70%, 20=78.66%, 50=15.60%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%, 4=0.01%, 250=0.01%, 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17787msec, maxt=17787msec
  WRITE: io=4,096MiB, aggrb=20,295KiB/s, minb=20,295KiB/s, maxb=20,295KiB/s, mint=206666msec, maxt=206666msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26160msec, maxt=26160msec
  WRITE: io=1,024MiB, aggrb=47,603KiB/s, minb=47,603KiB/s, maxb=47,603KiB/s, mint=22028msec, maxt=22028msec

Disk stats (read/write):
  sda: ios=16691/63712, merge=750/1233024, ticks=240980/119895364, in_queue=120136214, util=92.83%
98.53user 48.75system 11:28.77elapsed 21%CPU (0avgtext+0avgdata 16861280maxresident)k
8390600inputs+18763808outputs (8major+3220484minor)pagefaults 0swaps