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=16599
  read : io=4,096MiB, bw=239MiB/s, iops=15,299, runt= 17134msec
    clat (usec): min=10, max=211, avg=13.10, stdev= 2.35
    bw (KiB/s) : min=    0, max=250048, per=97.14%, avg=237788.34, stdev=41616.27
  write: io=4,096MiB, bw=24,991KiB/s, iops=1,561, runt=167828msec
    clat (usec): min=13, max=893K, avg=543.92, stdev=8074.57
    bw (KiB/s) : min=    0, max=88320, per=103.08%, avg=25759.80, stdev=17848.12
  cpu          : usr=20.69%, sys=2.85%, ctx=21687, 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=92.98%, 50=3.66%, 100=0.22%, 250=0.15%, 500=0.13%
     lat (usec): 750=0.20%, 1000=0.22%
     lat (msec): 2=1.15%, 4=0.85%, 10=0.10%, 20=0.10%, 50=0.09%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=16764
  read : io=4,039MiB, bw=159MiB/s, iops=10,198, runt= 25346msec
    clat (usec): min=2, max=184, avg=12.72, stdev= 3.03
    bw (KiB/s) : min=    0, max=245056, per=100.08%, avg=163294.54, stdev=44565.64
  write: io=1,024MiB, bw=49,496KiB/s, iops=3,093, runt= 21185msec
    clat (usec): min=5, max=1,022K, avg=31.78, stdev=3990.80
    bw (KiB/s) : min=    0, max=54208, per=100.43%, avg=49710.19, stdev=10567.76
  cpu          : usr=6.81%, sys=0.70%, ctx=5538, majf=0, minf=1114760
  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=258481/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.54%, 20=85.06%, 50=1.38%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17134msec, maxt=17134msec
  WRITE: io=4,096MiB, aggrb=24,991KiB/s, minb=24,991KiB/s, maxb=24,991KiB/s, mint=167828msec, maxt=167828msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25346msec, maxt=25346msec
  WRITE: io=1,024MiB, aggrb=49,497KiB/s, minb=49,497KiB/s, maxb=49,497KiB/s, mint=21185msec, maxt=21185msec

Disk stats (read/write):
  sda: ios=16976/62304, merge=465/1234339, ticks=225021/113710532, in_queue=113935486, util=100.00%
66.33user 32.44system 10:42.64elapsed 15%CPU (0avgtext+0avgdata 16861664maxresident)k
8390816inputs+18763336outputs (8major+3220800minor)pagefaults 0swaps