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=20589
  read : io=4,096MiB, bw=230MiB/s, iops=14,706, runt= 17825msec
    clat (usec): min=11, max=106, avg=15.85, stdev= 2.28
    bw (KiB/s) : min=    0, max=246240, per=97.26%, avg=228864.00, stdev=39771.38
  write: io=4,096MiB, bw=21,043KiB/s, iops=1,315, runt=199319msec
    clat (usec): min=13, max=932K, avg=560.45, stdev=9453.22
    bw (KiB/s) : min=    0, max=79712, per=105.77%, avg=22257.09, stdev=21684.76
  cpu          : usr=31.56%, sys=4.50%, ctx=78300, 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=50.96%, 50=45.44%, 100=0.32%, 250=1.42%, 500=0.38%
     lat (usec): 750=0.25%, 1000=0.29%
     lat (msec): 2=0.43%, 4=0.06%, 10=0.11%, 20=0.09%, 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=20864
  read : io=4,038MiB, bw=153MiB/s, iops=9,799, runt= 26369msec
    clat (usec): min=2, max=247, avg=14.99, stdev= 3.86
    bw (KiB/s) : min=    0, max=247744, per=100.18%, avg=157089.67, stdev=46439.71
  write: io=1,024MiB, bw=47,038KiB/s, iops=2,939, runt= 22292msec
    clat (usec): min=2, max=1,056K, avg=36.20, stdev=4123.66
    bw (KiB/s) : min=    0, max=52704, per=100.30%, avg=47178.45, stdev=10364.07
  cpu          : usr=7.16%, sys=1.09%, ctx=24200, majf=0, minf=1113956
  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=258413/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.02%, 20=76.66%, 50=17.28%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17825msec, maxt=17825msec
  WRITE: io=4,096MiB, aggrb=21,043KiB/s, minb=21,043KiB/s, maxb=21,043KiB/s, mint=199319msec, maxt=199319msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26369msec, maxt=26369msec
  WRITE: io=1,024MiB, aggrb=47,038KiB/s, minb=47,038KiB/s, maxb=47,038KiB/s, mint=22292msec, maxt=22292msec

Disk stats (read/write):
  sda: ios=16708/79446, merge=732/1217061, ticks=230986/108435913, in_queue=108666780, util=92.70%
97.15user 49.56system 11:00.52elapsed 22%CPU (0avgtext+0avgdata 16861280maxresident)k
8390352inputs+18761816outputs (7major+3220080minor)pagefaults 0swaps