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=13227
  read : io=4,096MiB, bw=230MiB/s, iops=14,742, runt= 17782msec
    clat (usec): min=11, max=123, avg=15.64, stdev= 2.29
    bw (KiB/s) : min=    0, max=245792, per=97.18%, avg=229237.33, stdev=39850.04
  write: io=4,096MiB, bw=19,777KiB/s, iops=1,236, runt=212072msec
    clat (usec): min=15, max=745K, avg=582.12, stdev=8868.62
    bw (KiB/s) : min=    0, max=80384, per=104.72%, avg=20711.37, stdev=17281.92
  cpu          : usr=30.28%, sys=4.62%, ctx=51722, majf=1, 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=49.81%, 50=46.38%, 100=0.51%, 250=1.60%, 500=0.31%
     lat (usec): 750=0.12%, 1000=0.14%
     lat (msec): 2=0.22%, 4=0.14%, 10=0.28%, 20=0.19%, 50=0.15%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=13513
  read : io=4,035MiB, bw=153MiB/s, iops=9,799, runt= 26351msec
    clat (usec): min=2, max=240, avg=14.60, stdev= 3.74
    bw (KiB/s) : min=    0, max=245696, per=100.75%, avg=157979.67, stdev=43637.09
  write: io=1,024MiB, bw=47,367KiB/s, iops=2,960, runt= 22137msec
    clat (usec): min=2, max=1,200K, avg=37.23, stdev=4686.15
    bw (KiB/s) : min=    0, max=52480, per=101.26%, avg=47965.07, stdev=9838.33
  cpu          : usr=6.41%, sys=0.85%, ctx=2070, majf=0, minf=1113191
  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=258230/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.31%, 20=79.74%, 50=11.92%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17782msec, maxt=17782msec
  WRITE: io=4,096MiB, aggrb=19,777KiB/s, minb=19,777KiB/s, maxb=19,777KiB/s, mint=212072msec, maxt=212072msec

Run status group 1 (all jobs):
   READ: io=4,035MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26351msec, maxt=26351msec
  WRITE: io=1,024MiB, aggrb=47,368KiB/s, minb=47,368KiB/s, maxb=47,368KiB/s, mint=22137msec, maxt=22137msec

Disk stats (read/write):
  sda: ios=17234/63267, merge=208/1232440, ticks=253232/131802337, in_queue=132055450, util=93.49%
104.40user 54.68system 13:03.05elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390648inputs+18755640outputs (8major+3219588minor)pagefaults 0swaps