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=13973
  read : io=4,096MiB, bw=231MiB/s, iops=14,756, runt= 17765msec
    clat (usec): min=11, max=329, avg=15.68, stdev= 2.84
    bw (KiB/s) : min=    0, max=246784, per=97.27%, avg=229659.56, stdev=40038.09
  write: io=4,096MiB, bw=19,567KiB/s, iops=1,222, runt=214354msec
    clat (usec): min=14, max=1,048K, avg=613.32, stdev=10555.60
    bw (KiB/s) : min=    0, max=79744, per=107.11%, avg=20957.84, stdev=20267.48
  cpu          : usr=31.05%, sys=4.00%, ctx=32970, 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=50.73%, 50=45.27%, 100=0.73%, 250=1.19%, 500=0.54%
     lat (usec): 750=0.21%, 1000=0.28%
     lat (msec): 2=0.43%, 4=0.13%, 10=0.14%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.09%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=14248
  read : io=4,037MiB, bw=155MiB/s, iops=9,917, runt= 26054msec
    clat (usec): min=2, max=342, avg=16.01, stdev= 4.19
    bw (KiB/s) : min=    0, max=242880, per=97.79%, avg=155179.69, stdev=39518.21
  write: io=1,024MiB, bw=47,877KiB/s, iops=2,992, runt= 21901msec
    clat (usec): min=3, max=331, avg=20.83, stdev= 4.39
    bw (KiB/s) : min=    0, max=49600, per=97.10%, avg=46488.73, stdev=7330.14
  cpu          : usr=6.67%, sys=0.94%, ctx=3388, majf=0, minf=1114711
  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=258392/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.40%, 20=69.36%, 50=25.21%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17765msec, maxt=17765msec
  WRITE: io=4,096MiB, aggrb=19,567KiB/s, minb=19,567KiB/s, maxb=19,567KiB/s, mint=214354msec, maxt=214354msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26054msec, maxt=26054msec
  WRITE: io=1,024MiB, aggrb=47,879KiB/s, minb=47,879KiB/s, maxb=47,879KiB/s, mint=21901msec, maxt=21901msec

Disk stats (read/write):
  sda: ios=16654/63223, merge=786/1233139, ticks=243902/123973394, in_queue=124217188, util=92.98%
98.90user 49.17system 11:42.85elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390792inputs+18760880outputs (9major+3220990minor)pagefaults 0swaps