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=30903
  read : io=4,096MiB, bw=236MiB/s, iops=15,075, runt= 17389msec
    clat (usec): min=11, max=109, avg=14.23, stdev= 1.95
    bw (KiB/s) : min=    0, max=248800, per=97.19%, avg=234442.06, stdev=41220.78
  write: io=4,096MiB, bw=18,701KiB/s, iops=1,168, runt=224280msec
    clat (usec): min=14, max=413K, avg=758.53, stdev=7333.49
    bw (KiB/s) : min=    0, max=66496, per=101.58%, avg=18996.31, stdev=16530.01
  cpu          : usr=18.22%, sys=2.22%, ctx=18662, majf=0, minf=2102316
  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=67.26%, 50=29.34%, 100=0.02%, 250=0.10%, 500=0.03%
     lat (usec): 750=0.09%, 1000=0.03%
     lat (msec): 2=0.94%, 4=1.37%, 10=0.27%, 20=0.16%, 50=0.15%
     lat (msec): 100=0.18%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=31118
  read : io=4,037MiB, bw=36,714KiB/s, iops=2,294, runt=112610msec
    clat (usec): min=2, max=825, avg=16.63, stdev= 5.02
    bw (KiB/s) : min=    0, max=235808, per=242.46%, avg=89016.78, stdev=81378.53
  write: io=1,024MiB, bw=9,684KiB/s, iops=605, runt=108271msec
    clat (usec): min=4, max=3,750K, avg=1346.38, stdev=57953.20
    bw (KiB/s) : min=    0, max=50816, per=249.58%, avg=24169.75, stdev=23008.66
  cpu          : usr=7.29%, sys=1.34%, ctx=1781, majf=0, minf=1123642
  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=258399/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.18%, 20=49.31%, 50=37.43%, 100=0.04%
     lat (usec): 250=0.01%, 500=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17389msec, maxt=17389msec
  WRITE: io=4,096MiB, aggrb=18,701KiB/s, minb=18,701KiB/s, maxb=18,701KiB/s, mint=224280msec, maxt=224280msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=36,714KiB/s, minb=36,714KiB/s, maxb=36,714KiB/s, mint=112610msec, maxt=112610msec
  WRITE: io=1,024MiB, aggrb=9,684KiB/s, minb=9,684KiB/s, maxb=9,684KiB/s, mint=108271msec, maxt=108271msec

Disk stats (read/write):
  sda: ios=18425/63011, merge=14371/1235581, ticks=257310/52768299, in_queue=53025884, util=93.97%
67.24user 31.80system 10:59.24elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390648inputs+18833880outputs (32major+3229712minor)pagefaults 0swaps