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=6176
  read : io=4,096MiB, bw=243MiB/s, iops=15,580, runt= 16825msec
    clat (usec): min=10, max=143, avg=12.06, stdev= 1.53
    bw (KiB/s) : min=    0, max=251680, per=97.13%, avg=242158.12, stdev=42959.83
  write: io=4,096MiB, bw=14,582KiB/s, iops=911, runt=287626msec
    clat (usec): min=13, max=5,862K, avg=1001.30, stdev=38041.00
    bw (KiB/s) : min=    0, max=77632, per=139.05%, avg=20276.21, stdev=19135.32
  cpu          : usr=13.52%, sys=1.58%, ctx=17755, majf=1, minf=2102315
  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=92.83%, 50=3.88%, 100=0.12%, 250=0.07%, 500=0.11%
     lat (usec): 750=0.18%, 1000=0.23%
     lat (msec): 2=1.11%, 4=0.87%, 10=0.33%, 20=0.02%, 50=0.02%
     lat (msec): 100=0.18%, 250=0.03%, 500=0.02%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%, >=2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=6458
  read : io=4,037MiB, bw=150MiB/s, iops=9,612, runt= 26878msec
    clat (usec): min=2, max=347, avg=13.46, stdev= 4.04
    bw (KiB/s) : min=    0, max=250976, per=103.62%, avg=159356.53, stdev=46832.83
  write: io=1,024MiB, bw=45,853KiB/s, iops=2,865, runt= 22868msec
    clat (usec): min=3, max=2,100K, avg=50.75, stdev=8201.55
    bw (KiB/s) : min=    0, max=52576, per=105.12%, avg=48204.29, stdev=10264.34
  cpu          : usr=7.51%, sys=0.78%, ctx=1728, majf=0, minf=1117800
  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=258358/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.86%, 20=76.29%, 50=10.76%, 100=0.05%
     lat (usec): 250=0.02%, 500=0.01%
     lat (msec): 4=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=243MiB/s, minb=243MiB/s, maxb=243MiB/s, mint=16825msec, maxt=16825msec
  WRITE: io=4,096MiB, aggrb=14,582KiB/s, minb=14,582KiB/s, maxb=14,582KiB/s, mint=287626msec, maxt=287626msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=150MiB/s, minb=150MiB/s, maxb=150MiB/s, mint=26878msec, maxt=26878msec
  WRITE: io=1,024MiB, aggrb=45,855KiB/s, minb=45,855KiB/s, maxb=45,855KiB/s, mint=22868msec, maxt=22868msec

Disk stats (read/write):
  sda: ios=17440/62186, merge=1/1234777, ticks=438900/85002128, in_queue=85440981, util=93.95%
66.51user 26.55system 12:23.81elapsed 12%CPU (0avgtext+0avgdata 0maxresident)k
8388912inputs+18787384outputs (2major+3224175minor)pagefaults 0swaps