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=31071
  read : io=4,096MiB, bw=230MiB/s, iops=14,702, runt= 17830msec
    clat (usec): min=13, max=153, avg=15.64, stdev= 2.47
    bw (KiB/s) : min=    0, max=240064, per=97.20%, avg=228663.11, stdev=39688.07
  write: io=4,096MiB, bw=20,812KiB/s, iops=1,300, runt=201528msec
    clat (usec): min=16, max=535K, avg=542.03, stdev=6102.61
    bw (KiB/s) : min=    0, max=78528, per=101.48%, avg=21119.09, stdev=14066.12
  cpu          : usr=31.28%, sys=5.27%, ctx=141833, majf=1, minf=2102343
  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=48.32%, 50=46.39%, 100=1.96%, 250=1.76%, 500=0.20%
     lat (usec): 750=0.13%, 1000=0.15%
     lat (msec): 2=0.20%, 4=0.12%, 10=0.26%, 20=0.18%, 50=0.17%
     lat (msec): 100=0.12%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=31156
  read : io=4,038MiB, bw=154MiB/s, iops=9,836, runt= 26271msec
    clat (usec): min=2, max=233, avg=17.34, stdev= 4.49
    bw (KiB/s) : min=    0, max=238272, per=97.66%, avg=153691.77, stdev=40350.38
  write: io=1,024MiB, bw=47,617KiB/s, iops=2,976, runt= 22021msec
    clat (usec): min=3, max=101K, avg=24.33, stdev=394.13
    bw (KiB/s) : min=    0, max=50784, per=97.81%, avg=46574.22, stdev=7775.93
  cpu          : usr=7.31%, sys=1.41%, ctx=14769, majf=0, minf=1114162
  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=258407/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.52%, 20=44.99%, 50=51.46%, 100=0.02%
     lat (usec): 250=0.01%
     lat (msec): 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=230MiB/s, minb=230MiB/s, maxb=230MiB/s, mint=17830msec, maxt=17830msec
  WRITE: io=4,096MiB, aggrb=20,812KiB/s, minb=20,812KiB/s, maxb=20,812KiB/s, mint=201528msec, maxt=201528msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26271msec, maxt=26271msec
  WRITE: io=1,024MiB, aggrb=47,618KiB/s, minb=47,618KiB/s, maxb=47,618KiB/s, mint=22021msec, maxt=22021msec

Disk stats (read/write):
  sda: ios=16699/62429, merge=741/1230524, ticks=239866/109269085, in_queue=109509831, util=92.94%
104.51user 47.18system 12:13.90elapsed 20%CPU (0avgtext+0avgdata 16861104maxresident)k
8390840inputs+18761320outputs (8major+3220393minor)pagefaults 0swaps