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=19723
  read : io=4,096MiB, bw=233MiB/s, iops=14,891, runt= 17604msec
    clat (usec): min=11, max=232, avg=14.73, stdev= 2.84
    bw (KiB/s) : min=    0, max=245248, per=97.21%, avg=231626.67, stdev=40333.90
  write: io=4,096MiB, bw=20,115KiB/s, iops=1,257, runt=208509msec
    clat (usec): min=14, max=905K, avg=559.07, stdev=8240.71
    bw (KiB/s) : min=    0, max=79424, per=104.17%, avg=20953.68, stdev=15224.39
  cpu          : usr=32.78%, sys=5.03%, ctx=51961, 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=50.07%, 50=45.67%, 100=0.92%, 250=1.67%, 500=0.35%
     lat (usec): 750=0.10%, 1000=0.11%
     lat (msec): 2=0.17%, 4=0.14%, 10=0.28%, 20=0.21%, 50=0.17%
     lat (msec): 100=0.09%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=19984
  read : io=4,037MiB, bw=152MiB/s, iops=9,756, runt= 26480msec
    clat (usec): min=2, max=224, avg=15.11, stdev= 3.83
    bw (KiB/s) : min=    0, max=244096, per=100.84%, avg=157416.27, stdev=43207.13
  write: io=1,024MiB, bw=46,983KiB/s, iops=2,936, runt= 22318msec
    clat (usec): min=3, max=1,136K, avg=37.05, stdev=4438.55
    bw (KiB/s) : min=    0, max=51904, per=101.18%, avg=47537.81, stdev=9384.93
  cpu          : usr=6.73%, sys=0.98%, ctx=6382, majf=0, minf=1114600
  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=258346/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.57%, 20=78.32%, 50=16.06%, 100=0.03%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17604msec, maxt=17604msec
  WRITE: io=4,096MiB, aggrb=20,115KiB/s, minb=20,115KiB/s, maxb=20,115KiB/s, mint=208509msec, maxt=208509msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=152MiB/s, minb=152MiB/s, maxb=152MiB/s, mint=26480msec, maxt=26480msec
  WRITE: io=1,024MiB, aggrb=46,984KiB/s, minb=46,984KiB/s, maxb=46,984KiB/s, mint=22318msec, maxt=22318msec

Disk stats (read/write):
  sda: ios=17225/64817, merge=215/1231428, ticks=236642/123039049, in_queue=123275540, util=93.22%
106.67user 52.35system 11:40.88elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8390928inputs+18759928outputs (8major+3220873minor)pagefaults 0swaps