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=14161
  read : io=4,096MiB, bw=228MiB/s, iops=14,569, runt= 17993msec
    clat (usec): min=13, max=149, avg=16.31, stdev= 2.45
    bw (KiB/s) : min=    0, max=237536, per=97.35%, avg=226931.56, stdev=39319.03
  write: io=4,096MiB, bw=20,356KiB/s, iops=1,272, runt=206039msec
    clat (usec): min=17, max=641K, avg=557.61, stdev=6771.44
    bw (KiB/s) : min=    0, max=85632, per=102.12%, avg=20787.21, stdev=14697.86
  cpu          : usr=31.19%, sys=5.55%, ctx=123721, 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=43.74%, 50=50.65%, 100=2.28%, 250=1.66%, 500=0.27%
     lat (usec): 750=0.12%, 1000=0.16%
     lat (msec): 2=0.22%, 4=0.12%, 10=0.27%, 20=0.21%, 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=14255
  read : io=4,038MiB, bw=154MiB/s, iops=9,884, runt= 26147msec
    clat (usec): min=2, max=251, avg=17.55, stdev= 4.50
    bw (KiB/s) : min=    0, max=237504, per=97.79%, avg=154668.31, stdev=39264.29
  write: io=1,024MiB, bw=47,967KiB/s, iops=2,997, runt= 21860msec
    clat (usec): min=3, max=107, avg=22.73, stdev= 4.29
    bw (KiB/s) : min=    0, max=51392, per=97.72%, avg=46873.45, stdev=7723.54
  cpu          : usr=6.94%, sys=1.27%, ctx=22113, majf=0, minf=1114830
  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=258463/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.51%, 20=42.96%, 50=53.50%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=228MiB/s, minb=228MiB/s, maxb=228MiB/s, mint=17993msec, maxt=17993msec
  WRITE: io=4,096MiB, aggrb=20,356KiB/s, minb=20,356KiB/s, maxb=20,356KiB/s, mint=206039msec, maxt=206039msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26147msec, maxt=26147msec
  WRITE: io=1,024MiB, aggrb=47,969KiB/s, minb=47,969KiB/s, maxb=47,969KiB/s, mint=21860msec, maxt=21860msec

Disk stats (read/write):
  sda: ios=16662/84486, merge=779/1212168, ticks=250759/116989537, in_queue=117240127, util=93.04%
105.12user 49.18system 14:07.04elapsed 18%CPU (0avgtext+0avgdata 16861552maxresident)k
8390608inputs+18763800outputs (8major+3221142minor)pagefaults 0swaps