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=17068
  read : io=4,096MiB, bw=234MiB/s, iops=14,990, runt= 17487msec
    clat (usec): min=11, max=141, avg=13.07, stdev= 2.61
    bw (KiB/s) : min=    0, max=249696, per=97.24%, avg=233233.37, stdev=49246.54
  write: io=4,096MiB, bw=18,468KiB/s, iops=1,154, runt=227108msec
    clat (usec): min=12, max=1,016K, avg=656.30, stdev=7448.34
    bw (KiB/s) : min=    0, max=66592, per=102.85%, avg=18994.77, stdev=17732.08
  cpu          : usr=30.22%, sys=3.34%, ctx=15804, majf=0, minf=2102312
  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=59.43%, 50=36.95%, 100=0.24%, 250=1.03%, 500=0.28%
     lat (usec): 750=0.09%, 1000=0.13%
     lat (msec): 2=0.89%, 4=0.29%, 10=0.15%, 20=0.13%, 50=0.18%
     lat (msec): 100=0.15%, 250=0.06%, 500=0.01%, 750=0.01%, 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17085
  read : io=4,038MiB, bw=36,659KiB/s, iops=2,291, runt=112791msec
    clat (usec): min=2, max=1,618, avg=19.59, stdev= 9.60
    bw (KiB/s) : min=    0, max=241408, per=231.70%, avg=84938.12, stdev=77833.51
  write: io=1,024MiB, bw=9,689KiB/s, iops=605, runt=108217msec
    clat (usec): min=2, max=4,532K, avg=1224.81, stdev=53941.15
    bw (KiB/s) : min=    0, max=49920, per=238.99%, avg=23155.26, stdev=21621.76
  cpu          : usr=10.11%, sys=1.65%, ctx=7355, majf=0, minf=1125953
  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=258426/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.19%, 20=44.80%, 50=53.83%, 100=0.11%
     lat (usec): 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 1000=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17487msec, maxt=17487msec
  WRITE: io=4,096MiB, aggrb=18,468KiB/s, minb=18,468KiB/s, maxb=18,468KiB/s, mint=227108msec, maxt=227108msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=36,659KiB/s, minb=36,659KiB/s, maxb=36,659KiB/s, mint=112791msec, maxt=112791msec
  WRITE: io=1,024MiB, aggrb=9,689KiB/s, minb=9,689KiB/s, maxb=9,689KiB/s, mint=108217msec, maxt=108217msec

Disk stats (read/write):
  sda: ios=18444/62134, merge=14352/1236038, ticks=252080/52141760, in_queue=52393768, util=93.69%
106.39user 47.60system 10:59.69elapsed 23%CPU (0avgtext+0avgdata 0maxresident)k
8389568inputs+18853040outputs (27major+3231999minor)pagefaults 0swaps