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=15510
  read : io=4,096MiB, bw=235MiB/s, iops=15,057, runt= 17409msec
    clat (usec): min=11, max=155, avg=14.19, stdev= 2.18
    bw (KiB/s) : min=    0, max=248480, per=97.19%, avg=234176.91, stdev=41169.37
  write: io=4,096MiB, bw=6,593KiB/s, iops=412, runt=636173msec
    clat (usec): min=14, max=1,323K, avg=2328.25, stdev=20466.71
    bw (KiB/s) : min=    0, max=52800, per=108.00%, avg=7120.59, stdev=7089.03
  cpu          : usr=6.68%, sys=0.90%, ctx=18700, majf=0, minf=2102325
  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=67.09%, 50=29.59%, 100=0.02%, 250=0.06%, 500=0.01%
     lat (usec): 750=0.03%, 1000=0.02%
     lat (msec): 2=0.31%, 4=0.90%, 10=1.01%, 20=0.08%, 50=0.08%
     lat (msec): 100=0.58%, 250=0.15%, 500=0.07%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=15960
  read : io=4,036MiB, bw=46,784KiB/s, iops=2,924, runt= 88335msec
    clat (usec): min=2, max=156, avg=16.25, stdev= 4.62
    bw (KiB/s) : min=    0, max=238400, per=176.11%, avg=82389.71, stdev=79003.83
  write: io=1,024MiB, bw=12,493KiB/s, iops=780, runt= 83932msec
    clat (usec): min=3, max=1,820K, avg=976.56, stdev=37648.83
    bw (KiB/s) : min=    0, max=51168, per=179.39%, avg=22411.43, stdev=22063.72
  cpu          : usr=8.14%, sys=1.51%, ctx=1624, majf=0, minf=1119452
  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=258292/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.33%, 20=55.03%, 50=31.55%, 100=0.05%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%, 1000=0.01%, 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17409msec, maxt=17409msec
  WRITE: io=4,096MiB, aggrb=6,593KiB/s, minb=6,593KiB/s, maxb=6,593KiB/s, mint=636173msec, maxt=636173msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=46,784KiB/s, minb=46,784KiB/s, maxb=46,784KiB/s, mint=88335msec, maxt=88335msec
  WRITE: io=1,024MiB, aggrb=12,493KiB/s, minb=12,493KiB/s, maxb=12,493KiB/s, mint=83932msec, maxt=83932msec

Disk stats (read/write):
  sda: ios=18338/61835, merge=14457/1236013, ticks=710266/72883814, in_queue=73594064, util=96.52%
67.38user 33.49system 17:38.36elapsed 9%CPU (0avgtext+0avgdata 0maxresident)k
8390512inputs+18805720outputs (31major+3227082minor)pagefaults 0swaps