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=5719
  read : io=4,096MiB, bw=237MiB/s, iops=15,155, runt= 17297msec
    clat (usec): min=12, max=235, avg=13.66, stdev= 1.92
    bw (KiB/s) : min=    0, max=244128, per=97.14%, avg=235559.31, stdev=41147.74
  write: io=4,096MiB, bw=19,746KiB/s, iops=1,234, runt=212406msec
    clat (usec): min=15, max=5,080K, avg=560.17, stdev=15613.40
    bw (KiB/s) : min=    0, max=46048, per=107.07%, avg=21141.64, stdev=11905.69
  cpu          : usr=35.55%, sys=4.70%, ctx=18216, 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=49.68%, 50=46.17%, 100=0.88%, 250=1.40%, 500=0.06%
     lat (usec): 750=0.03%, 1000=0.02%
     lat (msec): 2=0.30%, 4=0.90%, 10=0.13%, 20=0.10%, 50=0.18%
     lat (msec): 100=0.12%, 250=0.02%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): >=2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=5833
  read : io=4,039MiB, bw=155MiB/s, iops=9,938, runt= 26007msec
    clat (usec): min=2, max=1,314, avg=16.97, stdev= 5.71
    bw (KiB/s) : min=    0, max=236064, per=97.44%, avg=154942.15, stdev=38368.73
  write: io=1,024MiB, bw=48,491KiB/s, iops=3,030, runt= 21624msec
    clat (usec): min=3, max=981, avg=21.58, stdev= 5.92
    bw (KiB/s) : min=    0, max=51616, per=97.76%, avg=47406.55, stdev=7719.29
  cpu          : usr=6.73%, sys=1.09%, ctx=22821, majf=0, minf=1114063
  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=258475/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.39%, 20=62.19%, 50=32.38%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%, 1000=0.01%
     lat (msec): 2=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17297msec, maxt=17297msec
  WRITE: io=4,096MiB, aggrb=19,746KiB/s, minb=19,746KiB/s, maxb=19,746KiB/s, mint=212406msec, maxt=212406msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26007msec, maxt=26007msec
  WRITE: io=1,024MiB, aggrb=48,493KiB/s, minb=48,493KiB/s, maxb=48,493KiB/s, mint=21624msec, maxt=21624msec

Disk stats (read/write):
  sda: ios=17435/66585, merge=5/1230072, ticks=319877/96844762, in_queue=97164505, util=90.83%
111.40user 47.12system 11:36.28elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8388552inputs+18762400outputs (2major+3220348minor)pagefaults 0swaps