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=4157
  read : io=4,096MiB, bw=233MiB/s, iops=14,892, runt= 17603msec
    clat (usec): min=11, max=106, avg=14.95, stdev= 2.36
    bw (KiB/s) : min=    0, max=248384, per=97.24%, avg=231708.44, stdev=40312.13
  write: io=4,096MiB, bw=20,323KiB/s, iops=1,270, runt=206376msec
    clat (usec): min=15, max=790K, avg=560.30, stdev=7744.64
    bw (KiB/s) : min=    0, max=82048, per=103.27%, avg=20987.23, stdev=16069.33
  cpu          : usr=32.01%, sys=5.22%, ctx=57540, majf=1, minf=2102310
  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=50.10%, 50=45.62%, 100=0.92%, 250=1.35%, 500=0.53%
     lat (usec): 750=0.13%, 1000=0.14%
     lat (msec): 2=0.22%, 4=0.14%, 10=0.29%, 20=0.23%, 50=0.19%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=4282
  read : io=4,036MiB, bw=149MiB/s, iops=9,540, runt= 27077msec
    clat (usec): min=2, max=233, avg=15.03, stdev= 3.74
    bw (KiB/s) : min=    0, max=240992, per=102.58%, avg=156584.61, stdev=43767.41
  write: io=1,024MiB, bw=45,961KiB/s, iops=2,872, runt= 22814msec
    clat (usec): min=3, max=1,705K, avg=44.96, stdev=6660.22
    bw (KiB/s) : min=    0, max=52224, per=103.25%, avg=47456.33, stdev=10064.27
  cpu          : usr=6.62%, sys=0.95%, ctx=4121, majf=0, minf=1113827
  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=258327/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.31%, 20=79.03%, 50=12.63%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=233MiB/s, minb=233MiB/s, maxb=233MiB/s, mint=17603msec, maxt=17603msec
  WRITE: io=4,096MiB, aggrb=20,323KiB/s, minb=20,323KiB/s, maxb=20,323KiB/s, mint=206376msec, maxt=206376msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=149MiB/s, minb=149MiB/s, maxb=149MiB/s, mint=27077msec, maxt=27077msec
  WRITE: io=1,024MiB, aggrb=45,963KiB/s, minb=45,963KiB/s, maxb=45,963KiB/s, mint=22814msec, maxt=22814msec

Disk stats (read/write):
  sda: ios=17220/65624, merge=221/1230412, ticks=237068/125150498, in_queue=125387391, util=93.20%
104.09user 55.15system 11:41.94elapsed 22%CPU (0avgtext+0avgdata 16861728maxresident)k
8390648inputs+18757976outputs (8major+3220119minor)pagefaults 0swaps