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=21035
  read : io=4,096MiB, bw=233MiB/s, iops=14,923, runt= 17566msec
    clat (usec): min=11, max=938, avg=14.51, stdev= 3.07
    bw (KiB/s) : min=    0, max=249568, per=97.24%, avg=232185.78, stdev=40946.38
  write: io=4,096MiB, bw=20,261KiB/s, iops=1,266, runt=207007msec
    clat (usec): min=14, max=866K, avg=585.70, stdev=9875.18
    bw (KiB/s) : min=    0, max=80448, per=105.17%, avg=21307.99, stdev=20582.66
  cpu          : usr=31.74%, sys=4.08%, ctx=57906, 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=50.88%, 50=45.53%, 100=0.33%, 250=1.47%, 500=0.38%
     lat (usec): 750=0.22%, 1000=0.29%
     lat (msec): 2=0.36%, 4=0.07%, 10=0.12%, 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=21289
  read : io=4,038MiB, bw=160MiB/s, iops=10,214, runt= 25299msec
    clat (usec): min=2, max=236, avg=15.16, stdev= 3.68
    bw (KiB/s) : min=    0, max=244384, per=97.75%, avg=159755.92, stdev=40485.45
  write: io=1,024MiB, bw=49,655KiB/s, iops=3,103, runt= 21117msec
    clat (usec): min=3, max=109, avg=19.72, stdev= 3.90
    bw (KiB/s) : min=    0, max=52096, per=97.71%, avg=48520.93, stdev=7844.17
  cpu          : usr=6.80%, sys=0.95%, ctx=9496, majf=0, minf=1113843
  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=258429/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.25%, 20=78.18%, 50=16.54%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17566msec, maxt=17566msec
  WRITE: io=4,096MiB, aggrb=20,261KiB/s, minb=20,261KiB/s, maxb=20,261KiB/s, mint=207007msec, maxt=207007msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25299msec, maxt=25299msec
  WRITE: io=1,024MiB, aggrb=49,657KiB/s, minb=49,657KiB/s, maxb=49,657KiB/s, mint=21117msec, maxt=21117msec

Disk stats (read/write):
  sda: ios=16683/65590, merge=758/1230840, ticks=239156/117093287, in_queue=117332325, util=92.88%
98.05user 49.01system 11:23.27elapsed 21%CPU (0avgtext+0avgdata 16861296maxresident)k
8390784inputs+18761360outputs (9major+3220031minor)pagefaults 0swaps