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=2797
  read : io=4,096MiB, bw=199MiB/s, iops=12,721, runt= 20607msec
    clat (usec): min=12, max=3,061, avg=17.90, stdev= 8.23
    bw (KiB/s) : min=    0, max=244160, per=97.57%, avg=198588.95, stdev=59192.41
  write: io=4,096MiB, bw=17,675KiB/s, iops=1,104, runt=237294msec
    clat (usec): min=15, max=308K, avg=685.08, stdev=7275.42
    bw (KiB/s) : min=    0, max=65536, per=101.77%, avg=17988.73, stdev=15721.40
  cpu          : usr=30.88%, sys=4.71%, ctx=16541, majf=0, 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=44.82%, 50=48.26%, 100=3.52%, 250=0.34%, 500=1.19%
     lat (usec): 750=0.09%, 1000=0.18%
     lat (msec): 2=0.72%, 4=0.21%, 10=0.16%, 20=0.13%, 50=0.15%
     lat (msec): 100=0.16%, 250=0.07%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=3062
  read : io=4,037MiB, bw=33,689KiB/s, iops=2,105, runt=122706msec
    clat (usec): min=2, max=3,080, avg=23.97, stdev=13.41
    bw (KiB/s) : min=    0, max=227072, per=224.07%, avg=75486.40, stdev=68516.54
  write: io=1,024MiB, bw=8,995KiB/s, iops=562, runt=116566msec
    clat (usec): min=3, max=4,540K, avg=1322.23, stdev=55526.00
    bw (KiB/s) : min=    0, max=49664, per=235.45%, avg=21179.05, stdev=20327.33
  cpu          : usr=10.65%, sys=2.60%, ctx=20995, majf=0, minf=1123036
  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=258368/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.42%, 20=33.59%, 50=56.41%, 100=5.51%
     lat (usec): 250=0.04%, 500=0.01%, 750=0.01%
     lat (msec): 4=0.01%, 10=0.01%, 20=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=199MiB/s, minb=199MiB/s, maxb=199MiB/s, mint=20607msec, maxt=20607msec
  WRITE: io=4,096MiB, aggrb=17,675KiB/s, minb=17,675KiB/s, maxb=17,675KiB/s, mint=237294msec, maxt=237294msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=33,689KiB/s, minb=33,689KiB/s, maxb=33,689KiB/s, mint=122706msec, maxt=122706msec
  WRITE: io=1,024MiB, aggrb=8,995KiB/s, minb=8,995KiB/s, maxb=8,995KiB/s, mint=116566msec, maxt=116566msec

Disk stats (read/write):
  sda: ios=18409/62502, merge=14387/1235740, ticks=257103/53037688, in_queue=53294749, util=92.64%
113.41user 67.99system 11:14.33elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k
8390456inputs+18834608outputs (32major+3229160minor)pagefaults 0swaps