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=17090
  read : io=4,096MiB, bw=232MiB/s, iops=14,829, runt= 17677msec
    clat (usec): min=10, max=138, avg=13.15, stdev= 2.80
    bw (KiB/s) : min=    0, max=250144, per=97.25%, avg=230743.11, stdev=52487.98
  write: io=4,096MiB, bw=18,055KiB/s, iops=1,128, runt=232302msec
    clat (usec): min=12, max=512K, avg=672.19, stdev=7279.10
    bw (KiB/s) : min=    0, max=66752, per=101.78%, avg=18375.98, stdev=16756.48
  cpu          : usr=29.83%, sys=3.22%, ctx=15770, majf=0, minf=2102313
  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=56.15%, 50=40.12%, 100=0.36%, 250=1.06%, 500=0.30%
     lat (usec): 750=0.08%, 1000=0.12%
     lat (msec): 2=0.79%, 4=0.26%, 10=0.24%, 20=0.13%, 50=0.16%
     lat (msec): 100=0.15%, 250=0.07%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=17107
  read : io=4,037MiB, bw=36,190KiB/s, iops=2,261, runt=114226msec
    clat (usec): min=2, max=1,757, avg=19.77, stdev=10.21
    bw (KiB/s) : min=    0, max=240800, per=225.10%, avg=81462.11, stdev=77339.32
  write: io=1,024MiB, bw=9,586KiB/s, iops=599, runt=109381msec
    clat (usec): min=2, max=3,116K, avg=1241.41, stdev=52090.69
    bw (KiB/s) : min=    0, max=50656, per=233.12%, avg=22346.98, stdev=21681.25
  cpu          : usr=9.85%, sys=1.68%, ctx=7355, majf=0, minf=1125113
  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=258365/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.15%, 20=44.41%, 50=54.25%, 100=0.11%
     lat (usec): 250=0.05%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2=0.01%, 250=0.01%, 750=0.01%, 1000=0.01%, 2000=0.01%
     lat (msec): >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17677msec, maxt=17677msec
  WRITE: io=4,096MiB, aggrb=18,055KiB/s, minb=18,055KiB/s, maxb=18,055KiB/s, mint=232302msec, maxt=232302msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=36,190KiB/s, minb=36,190KiB/s, maxb=36,190KiB/s, mint=114226msec, maxt=114226msec
  WRITE: io=1,024MiB, aggrb=9,586KiB/s, minb=9,586KiB/s, maxb=9,586KiB/s, mint=109381msec, maxt=109381msec

Disk stats (read/write):
  sda: ios=18410/62167, merge=14385/1235986, ticks=251760/53813920, in_queue=54065632, util=93.70%
107.04user 47.98system 11:14.63elapsed 22%CPU (0avgtext+0avgdata 0maxresident)k
8389560inputs+18848072outputs (27major+3231221minor)pagefaults 0swaps