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=22132
  read : io=4,096MiB, bw=227MiB/s, iops=14,532, runt= 18038msec
    clat (usec): min=11, max=267, avg=15.13, stdev= 2.83
    bw (KiB/s) : min=    0, max=245952, per=97.30%, avg=226263.35, stdev=39936.92
  write: io=4,096MiB, bw=20,433KiB/s, iops=1,277, runt=205269msec
    clat (usec): min=14, max=860K, avg=576.86, stdev=9695.37
    bw (KiB/s) : min=    0, max=79584, per=105.21%, avg=21497.82, stdev=20623.38
  cpu          : usr=32.33%, sys=4.06%, ctx=51245, majf=1, minf=2102309
  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=50.47%, 50=45.71%, 100=0.56%, 250=1.47%, 500=0.42%
     lat (usec): 750=0.22%, 1000=0.28%
     lat (msec): 2=0.36%, 4=0.06%, 10=0.13%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=22394
  read : io=4,036MiB, bw=157MiB/s, iops=10,028, runt= 25759msec
    clat (usec): min=2, max=335, avg=15.47, stdev= 4.14
    bw (KiB/s) : min=    0, max=245728, per=97.70%, avg=156771.08, stdev=41950.97
  write: io=1,024MiB, bw=48,644KiB/s, iops=3,040, runt= 21556msec
    clat (usec): min=3, max=1,098, avg=20.40, stdev= 6.09
    bw (KiB/s) : min=    0, max=51712, per=97.77%, avg=47560.73, stdev=8279.60
  cpu          : usr=6.79%, sys=0.87%, ctx=5059, majf=0, minf=1113927
  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=258330/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.45%, 20=72.48%, 50=22.04%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=227MiB/s, minb=227MiB/s, maxb=227MiB/s, mint=18038msec, maxt=18038msec
  WRITE: io=4,096MiB, aggrb=20,433KiB/s, minb=20,433KiB/s, maxb=20,433KiB/s, mint=205269msec, maxt=205269msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25759msec, maxt=25759msec
  WRITE: io=1,024MiB, aggrb=48,645KiB/s, minb=48,645KiB/s, maxb=48,645KiB/s, mint=21556msec, maxt=21556msec

Disk stats (read/write):
  sda: ios=16681/66245, merge=760/1229805, ticks=234002/120101035, in_queue=120334952, util=92.82%
99.74user 48.77system 11:29.37elapsed 21%CPU (0avgtext+0avgdata 16861312maxresident)k
8390776inputs+18758448outputs (9major+3220142minor)pagefaults 0swaps