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=2188
  read : io=4,096MiB, bw=219MiB/s, iops=14,037, runt= 18674msec
    clat (usec): min=13, max=122, avg=18.97, stdev= 1.79
    bw (KiB/s) : min=    0, max=236480, per=97.38%, avg=218730.11, stdev=36579.75
  write: io=4,096MiB, bw=20,706KiB/s, iops=1,294, runt=202560msec
    clat (usec): min=16, max=565K, avg=540.88, stdev=6444.24
    bw (KiB/s) : min=    0, max=80512, per=101.64%, avg=21044.55, stdev=14162.85
  cpu          : usr=31.72%, sys=5.43%, ctx=110271, 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=33.97%, 50=60.60%, 100=2.12%, 250=1.74%, 500=0.21%
     lat (usec): 750=0.12%, 1000=0.15%
     lat (msec): 2=0.18%, 4=0.13%, 10=0.27%, 20=0.20%, 50=0.16%
     lat (msec): 100=0.10%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=2312
  read : io=4,038MiB, bw=153MiB/s, iops=9,818, runt= 26320msec
    clat (usec): min=2, max=252, avg=17.62, stdev= 4.47
    bw (KiB/s) : min=    0, max=237088, per=97.60%, avg=153340.98, stdev=39390.49
  write: io=1,024MiB, bw=47,673KiB/s, iops=2,979, runt= 21995msec
    clat (usec): min=2, max=144, avg=22.85, stdev= 4.29
    bw (KiB/s) : min=    0, max=50272, per=97.66%, avg=46560.23, stdev=7670.52
  cpu          : usr=6.44%, sys=1.02%, ctx=1121, majf=0, minf=1113721
  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=258431/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.63%, 20=41.84%, 50=55.49%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=219MiB/s, minb=219MiB/s, maxb=219MiB/s, mint=18674msec, maxt=18674msec
  WRITE: io=4,096MiB, aggrb=20,706KiB/s, minb=20,706KiB/s, maxb=20,706KiB/s, mint=202560msec, maxt=202560msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26320msec, maxt=26320msec
  WRITE: io=1,024MiB, aggrb=47,675KiB/s, minb=47,675KiB/s, maxb=47,675KiB/s, mint=21995msec, maxt=21995msec

Disk stats (read/write):
  sda: ios=16641/72402, merge=799/1224062, ticks=245191/132413486, in_queue=132658566, util=93.29%
106.78user 44.74system 13:01.46elapsed 19%CPU (0avgtext+0avgdata 16861376maxresident)k
8390792inputs+18762064outputs (9major+3220154minor)pagefaults 0swaps