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=3226
  read : io=4,096MiB, bw=234MiB/s, iops=14,991, runt= 17486msec
    clat (usec): min=11, max=369, avg=14.39, stdev= 3.08
    bw (KiB/s) : min=    0, max=246656, per=97.07%, avg=232846.63, stdev=41184.92
  write: io=4,096MiB, bw=19,606KiB/s, iops=1,225, runt=213925msec
    clat (usec): min=14, max=857K, avg=627.38, stdev=11243.52
    bw (KiB/s) : min=    0, max=81344, per=108.89%, avg=21348.56, stdev=23484.21
  cpu          : usr=29.52%, sys=3.78%, ctx=32317, 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=50.35%, 50=45.88%, 100=0.49%, 250=1.00%, 500=0.64%
     lat (usec): 750=0.28%, 1000=0.38%
     lat (msec): 2=0.46%, 4=0.06%, 10=0.14%, 20=0.10%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=3514
  read : io=4,037MiB, bw=160MiB/s, iops=10,238, runt= 25239msec
    clat (usec): min=2, max=383, avg=14.84, stdev= 4.42
    bw (KiB/s) : min=    0, max=246240, per=97.77%, avg=160153.73, stdev=39810.54
  write: io=1,024MiB, bw=49,818KiB/s, iops=3,113, runt= 21048msec
    clat (usec): min=2, max=492, avg=18.87, stdev= 5.35
    bw (KiB/s) : min=    0, max=52384, per=97.71%, avg=48675.63, stdev=7908.10
  cpu          : usr=6.56%, sys=0.97%, ctx=13536, majf=0, minf=1114303
  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=258399/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.61%, 20=78.96%, 50=12.37%, 100=0.03%
     lat (usec): 250=0.02%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17486msec, maxt=17486msec
  WRITE: io=4,096MiB, aggrb=19,606KiB/s, minb=19,606KiB/s, maxb=19,606KiB/s, mint=213925msec, maxt=213925msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25239msec, maxt=25239msec
  WRITE: io=1,024MiB, aggrb=49,818KiB/s, minb=49,818KiB/s, maxb=49,818KiB/s, mint=21048msec, maxt=21048msec

Disk stats (read/write):
  sda: ios=16783/63983, merge=658/1232336, ticks=262353/116736938, in_queue=116999200, util=93.07%
93.98user 52.11system 12:21.55elapsed 19%CPU (0avgtext+0avgdata 16861280maxresident)k
8390384inputs+18760568outputs (7major+3220549minor)pagefaults 0swaps