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=4852
  read : io=4,096MiB, bw=236MiB/s, iops=15,076, runt= 17388msec
    clat (usec): min=11, max=110, avg=14.20, stdev= 2.02
    bw (KiB/s) : min=    0, max=249088, per=97.20%, avg=234458.51, stdev=41231.79
  write: io=4,096MiB, bw=18,877KiB/s, iops=1,179, runt=222183msec
    clat (usec): min=15, max=488K, avg=749.41, stdev=7364.07
    bw (KiB/s) : min=    0, max=66528, per=102.46%, avg=19341.44, stdev=17160.30
  cpu          : usr=18.47%, sys=2.34%, ctx=18805, majf=0, minf=2102313
  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=66.19%, 50=30.39%, 100=0.02%, 250=0.11%, 500=0.03%
     lat (usec): 750=0.09%, 1000=0.03%
     lat (msec): 2=0.99%, 4=1.34%, 10=0.28%, 20=0.16%, 50=0.14%
     lat (msec): 100=0.17%, 250=0.07%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=5039
  read : io=4,038MiB, bw=38,625KiB/s, iops=2,414, runt=107060msec
    clat (usec): min=2, max=491, avg=16.65, stdev= 4.81
    bw (KiB/s) : min=    0, max=233376, per=226.35%, avg=87427.56, stdev=80023.99
  write: io=1,024MiB, bw=10,215KiB/s, iops=638, runt=102650msec
    clat (usec): min=3, max=3,524K, avg=1260.38, stdev=53499.34
    bw (KiB/s) : min=    0, max=51424, per=234.21%, avg=23925.06, stdev=22809.97
  cpu          : usr=7.57%, sys=1.41%, ctx=1633, majf=0, minf=1120265
  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=258452/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.18%, 20=51.34%, 50=35.42%, 100=0.03%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 100=0.01%, 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17388msec, maxt=17388msec
  WRITE: io=4,096MiB, aggrb=18,877KiB/s, minb=18,877KiB/s, maxb=18,877KiB/s, mint=222183msec, maxt=222183msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=38,625KiB/s, minb=38,625KiB/s, maxb=38,625KiB/s, mint=107060msec, maxt=107060msec
  WRITE: io=1,024MiB, aggrb=10,215KiB/s, minb=10,215KiB/s, maxb=10,215KiB/s, mint=102650msec, maxt=102650msec

Disk stats (read/write):
  sda: ios=18426/62385, merge=14369/1236168, ticks=253148/51192912, in_queue=51446047, util=93.85%
67.65user 32.28system 11:04.74elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390648inputs+18811064outputs (32major+3226284minor)pagefaults 0swaps