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=17171
  read : io=4,096MiB, bw=239MiB/s, iops=15,291, runt= 17143msec
    clat (usec): min=11, max=168, avg=13.16, stdev= 1.98
    bw (KiB/s) : min=    0, max=247712, per=97.20%, avg=237810.29, stdev=41615.82
  write: io=4,096MiB, bw=19,204KiB/s, iops=1,200, runt=218398msec
    clat (usec): min=13, max=727K, avg=613.57, stdev=7725.76
    bw (KiB/s) : min=    0, max=83200, per=102.32%, avg=19649.11, stdev=16762.02
  cpu          : usr=30.79%, sys=4.07%, ctx=69907, majf=1, minf=2102311
  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=51.06%, 50=45.32%, 100=0.36%, 250=1.54%, 500=0.29%
     lat (usec): 750=0.18%, 1000=0.22%
     lat (msec): 2=0.28%, 4=0.09%, 10=0.21%, 20=0.17%, 50=0.10%
     lat (msec): 100=0.11%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17246
  read : io=4,037MiB, bw=158MiB/s, iops=10,120, runt= 25529msec
    clat (usec): min=2, max=181, avg=15.41, stdev= 3.51
    bw (KiB/s) : min=    0, max=247136, per=98.03%, avg=158741.33, stdev=43559.69
  write: io=1,024MiB, bw=48,918KiB/s, iops=3,057, runt= 21435msec
    clat (usec): min=4, max=127, avg=20.19, stdev= 3.63
    bw (KiB/s) : min=    0, max=51648, per=97.65%, avg=47769.98, stdev=8317.38
  cpu          : usr=6.83%, sys=0.98%, ctx=23266, majf=0, minf=1114269
  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=258373/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.53%, 20=79.54%, 50=18.90%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17143msec, maxt=17143msec
  WRITE: io=4,096MiB, aggrb=19,204KiB/s, minb=19,204KiB/s, maxb=19,204KiB/s, mint=218398msec, maxt=218398msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25529msec, maxt=25529msec
  WRITE: io=1,024MiB, aggrb=48,919KiB/s, minb=48,919KiB/s, maxb=48,919KiB/s, mint=21435msec, maxt=21435msec

Disk stats (read/write):
  sda: ios=16492/70207, merge=950/1225964, ticks=276140/118710316, in_queue=118986337, util=93.27%
102.50user 44.27system 12:30.21elapsed 19%CPU (0avgtext+0avgdata 16861424maxresident)k
8390776inputs+18759608outputs (9major+3220558minor)pagefaults 0swaps