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=4631
  read : io=4,096MiB, bw=232MiB/s, iops=14,833, runt= 17672msec
    clat (usec): min=11, max=103, avg=15.31, stdev= 2.21
    bw (KiB/s) : min=    0, max=248192, per=97.19%, avg=230675.56, stdev=40009.56
  write: io=4,096MiB, bw=19,081KiB/s, iops=1,192, runt=219812msec
    clat (usec): min=14, max=835K, avg=641.26, stdev=11026.66
    bw (KiB/s) : min=    0, max=80384, per=107.08%, avg=20432.69, stdev=22347.23
  cpu          : usr=30.11%, sys=3.45%, ctx=13891, majf=1, minf=2102310
  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=50.53%, 50=45.93%, 100=0.28%, 250=1.34%, 500=0.36%
     lat (usec): 750=0.25%, 1000=0.34%
     lat (msec): 2=0.42%, 4=0.06%, 10=0.14%, 20=0.11%, 50=0.08%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=4909
  read : io=4,036MiB, bw=161MiB/s, iops=10,302, runt= 25075msec
    clat (usec): min=2, max=148, avg=14.90, stdev= 3.46
    bw (KiB/s) : min=    0, max=245568, per=97.90%, avg=161369.60, stdev=41050.27
  write: io=1,024MiB, bw=50,118KiB/s, iops=3,132, runt= 20922msec
    clat (usec): min=2, max=106, avg=19.56, stdev= 3.62
    bw (KiB/s) : min=    0, max=52224, per=97.60%, avg=48914.29, stdev=7894.69
  cpu          : usr=6.76%, sys=0.99%, ctx=20389, majf=0, minf=1113689
  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=258327/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.69%, 20=79.71%, 50=15.58%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17672msec, maxt=17672msec
  WRITE: io=4,096MiB, aggrb=19,081KiB/s, minb=19,081KiB/s, maxb=19,081KiB/s, mint=219812msec, maxt=219812msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=161MiB/s, minb=161MiB/s, maxb=161MiB/s, mint=25075msec, maxt=25075msec
  WRITE: io=1,024MiB, aggrb=50,118KiB/s, minb=50,118KiB/s, maxb=50,118KiB/s, mint=20922msec, maxt=20922msec

Disk stats (read/write):
  sda: ios=16705/63494, merge=736/1232551, ticks=270867/110548055, in_queue=110818843, util=92.92%
96.08user 50.31system 12:11.62elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390384inputs+18758248outputs (7major+3219901minor)pagefaults 0swaps