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=4276
  read : io=4,096MiB, bw=236MiB/s, iops=15,110, runt= 17348msec
    clat (usec): min=11, max=174, avg=14.04, stdev= 2.15
    bw (KiB/s) : min=    0, max=248480, per=97.18%, avg=234969.60, stdev=41216.09
  write: io=4,096MiB, bw=24,122KiB/s, iops=1,507, runt=173878msec
    clat (usec): min=15, max=375K, avg=565.77, stdev=6372.54
    bw (KiB/s) : min=    0, max=87552, per=101.07%, avg=24378.94, stdev=16097.31
  cpu          : usr=20.36%, sys=3.21%, ctx=19218, majf=1, minf=2108596
  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=63.78%, 50=32.85%, 100=0.11%, 250=0.27%, 500=0.14%
     lat (usec): 750=0.16%, 1000=0.21%
     lat (msec): 2=1.19%, 4=0.75%, 10=0.12%, 20=0.12%, 50=0.12%
     lat (msec): 100=0.12%, 250=0.05%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=4474
  read : io=4,036MiB, bw=162MiB/s, iops=10,360, runt= 24931msec
    clat (usec): min=2, max=162, avg=13.51, stdev= 3.42
    bw (KiB/s) : min=    0, max=245600, per=97.88%, avg=162259.84, stdev=40496.48
  write: io=1,024MiB, bw=50,424KiB/s, iops=3,151, runt= 20795msec
    clat (usec): min=3, max=135K, avg=19.91, stdev=528.73
    bw (KiB/s) : min=    0, max=52480, per=97.61%, avg=49219.05, stdev=8071.90
  cpu          : usr=7.27%, sys=0.87%, ctx=1692, majf=0, minf=1115266
  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=258299/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.53%, 20=80.23%, 50=6.22%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17348msec, maxt=17348msec
  WRITE: io=4,096MiB, aggrb=24,122KiB/s, minb=24,122KiB/s, maxb=24,122KiB/s, mint=173878msec, maxt=173878msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=162MiB/s, minb=162MiB/s, maxb=162MiB/s, mint=24931msec, maxt=24931msec
  WRITE: io=1,024MiB, aggrb=50,424KiB/s, minb=50,424KiB/s, maxb=50,424KiB/s, mint=20795msec, maxt=20795msec

Disk stats (read/write):
  sda: ios=17072/62410, merge=370/1233568, ticks=274982/97183886, in_queue=97458810, util=92.42%
67.36user 32.24system 10:36.71elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390824inputs+18821600outputs (8major+3227547minor)pagefaults 0swaps