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=7804
  read : io=4,096MiB, bw=230MiB/s, iops=14,729, runt= 17797msec
    clat (usec): min=11, max=232, avg=14.32, stdev= 2.99
    bw (KiB/s) : min=    0, max=247968, per=97.25%, avg=229203.56, stdev=47001.94
  write: io=4,096MiB, bw=20,046KiB/s, iops=1,252, runt=209229msec
    clat (usec): min=13, max=611K, avg=572.90, stdev=6797.82
    bw (KiB/s) : min=    0, max=79968, per=101.38%, avg=20321.70, stdev=14352.37
  cpu          : usr=30.30%, sys=4.29%, ctx=89307, majf=1, minf=2102343
  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=50.65%, 50=45.80%, 100=0.26%, 250=1.75%, 500=0.12%
     lat (usec): 750=0.09%, 1000=0.13%
     lat (msec): 2=0.23%, 4=0.16%, 10=0.28%, 20=0.22%, 50=0.16%
     lat (msec): 100=0.10%, 250=0.05%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=7898
  read : io=4,038MiB, bw=161MiB/s, iops=10,324, runt= 25030msec
    clat (usec): min=2, max=379, avg=14.25, stdev= 4.24
    bw (KiB/s) : min=    0, max=246304, per=97.70%, avg=161392.00, stdev=39415.87
  write: io=1,024MiB, bw=50,305KiB/s, iops=3,144, runt= 20844msec
    clat (usec): min=2, max=143, avg=18.12, stdev= 3.96
    bw (KiB/s) : min=    0, max=52064, per=97.13%, avg=48864.00, stdev=7816.93
  cpu          : usr=6.29%, sys=0.83%, ctx=1792, majf=0, minf=1115265
  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=258423/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.51%, 20=80.66%, 50=10.78%, 100=0.03%
     lat (usec): 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=17797msec, maxt=17797msec
  WRITE: io=4,096MiB, aggrb=20,046KiB/s, minb=20,046KiB/s, maxb=20,046KiB/s, mint=209229msec, maxt=209229msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25030msec, maxt=25030msec
  WRITE: io=1,024MiB, aggrb=50,306KiB/s, minb=50,306KiB/s, maxb=50,306KiB/s, mint=20844msec, maxt=20844msec

Disk stats (read/write):
  sda: ios=16625/64881, merge=814/1231557, ticks=263712/134839252, in_queue=135102849, util=93.58%
104.27user 44.99system 13:05.85elapsed 18%CPU (0avgtext+0avgdata 16861104maxresident)k
8390784inputs+18761696outputs (9major+3221719minor)pagefaults 0swaps