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=8636
  read : io=4,096MiB, bw=232MiB/s, iops=14,830, runt= 17676msec
    clat (usec): min=10, max=226, avg=15.24, stdev= 1.86
    bw (KiB/s) : min=    0, max=250880, per=97.24%, avg=230731.56, stdev=39813.60
  write: io=4,096MiB, bw=19,635KiB/s, iops=1,227, runt=213606msec
    clat (usec): min=14, max=863K, avg=617.12, stdev=11116.14
    bw (KiB/s) : min=    0, max=80192, per=108.97%, avg=21396.32, stdev=22929.45
  cpu          : usr=30.49%, sys=3.47%, ctx=16791, 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=51.85%, 50=44.56%, 100=0.34%, 250=1.46%, 500=0.30%
     lat (usec): 750=0.23%, 1000=0.31%
     lat (msec): 2=0.43%, 4=0.08%, 10=0.13%, 20=0.10%, 50=0.07%
     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=8897
  read : io=4,038MiB, bw=154MiB/s, iops=9,860, runt= 26206msec
    clat (usec): min=2, max=227, avg=13.82, stdev= 3.79
    bw (KiB/s) : min=    0, max=245344, per=99.28%, avg=156634.44, stdev=45204.10
  write: io=1,024MiB, bw=48,444KiB/s, iops=3,027, runt= 21645msec
    clat (usec): min=3, max=769K, avg=29.99, stdev=3003.79
    bw (KiB/s) : min=    0, max=53088, per=99.18%, avg=48048.49, stdev=10551.80
  cpu          : usr=7.22%, sys=1.04%, ctx=13990, majf=0, minf=1114117
  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=258409/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.37%, 20=81.98%, 50=8.62%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17676msec, maxt=17676msec
  WRITE: io=4,096MiB, aggrb=19,635KiB/s, minb=19,635KiB/s, maxb=19,635KiB/s, mint=213606msec, maxt=213606msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26206msec, maxt=26206msec
  WRITE: io=1,024MiB, aggrb=48,445KiB/s, minb=48,445KiB/s, maxb=48,445KiB/s, mint=21645msec, maxt=21645msec

Disk stats (read/write):
  sda: ios=16777/63223, merge=664/1233209, ticks=261124/108033843, in_queue=108294880, util=92.55%
96.58user 49.36system 11:54.03elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390648inputs+18761416outputs (8major+3220260minor)pagefaults 0swaps