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=11859
  read : io=4,096MiB, bw=236MiB/s, iops=15,083, runt= 17379msec
    clat (usec): min=11, max=179, avg=14.10, stdev= 2.30
    bw (KiB/s) : min=    0, max=248672, per=97.20%, avg=234576.46, stdev=41209.31
  write: io=4,096MiB, bw=23,756KiB/s, iops=1,484, runt=176557msec
    clat (usec): min=14, max=377K, avg=577.19, stdev=6176.34
    bw (KiB/s) : min=    0, max=85088, per=100.88%, avg=23963.92, stdev=15780.22
  cpu          : usr=19.87%, sys=3.03%, ctx=19130, majf=1, minf=2108707
  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=70.44%, 50=26.18%, 100=0.13%, 250=0.23%, 500=0.09%
     lat (usec): 750=0.14%, 1000=0.20%
     lat (msec): 2=1.02%, 4=1.01%, 10=0.12%, 20=0.12%, 50=0.13%
     lat (msec): 100=0.13%, 250=0.05%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12078
  read : io=4,038MiB, bw=157MiB/s, iops=10,040, runt= 25737msec
    clat (usec): min=2, max=330, avg=13.24, stdev= 3.85
    bw (KiB/s) : min=    0, max=245280, per=100.72%, avg=161802.58, stdev=43335.44
  write: io=1,024MiB, bw=48,748KiB/s, iops=3,046, runt= 21510msec
    clat (usec): min=2, max=1,132K, avg=34.79, stdev=4423.58
    bw (KiB/s) : min=    0, max=53344, per=100.93%, avg=49200.90, stdev=9888.29
  cpu          : usr=7.47%, sys=0.92%, ctx=1725, majf=0, minf=1115889
  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=258411/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.62%, 20=81.42%, 50=4.92%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17379msec, maxt=17379msec
  WRITE: io=4,096MiB, aggrb=23,756KiB/s, minb=23,756KiB/s, maxb=23,756KiB/s, mint=176557msec, maxt=176557msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25737msec, maxt=25737msec
  WRITE: io=1,024MiB, aggrb=48,748KiB/s, minb=48,748KiB/s, maxb=48,748KiB/s, mint=21510msec, maxt=21510msec

Disk stats (read/write):
  sda: ios=17060/63541, merge=380/1233834, ticks=279798/94425038, in_queue=94704772, util=92.81%
66.72user 32.72system 10:27.61elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390672inputs+18829536outputs (7major+3228243minor)pagefaults 0swaps