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=21614
  read : io=4,096MiB, bw=238MiB/s, iops=15,261, runt= 17177msec
    clat (usec): min=11, max=143, avg=13.26, stdev= 2.01
    bw (KiB/s) : min=    0, max=248000, per=97.21%, avg=237364.11, stdev=41557.27
  write: io=4,096MiB, bw=21,064KiB/s, iops=1,316, runt=199116msec
    clat (usec): min=14, max=843K, avg=563.35, stdev=9727.75
    bw (KiB/s) : min=    0, max=79936, per=106.13%, avg=22355.94, stdev=21753.68
  cpu          : usr=31.54%, sys=4.32%, ctx=52457, 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=51.74%, 50=44.44%, 100=0.57%, 250=1.09%, 500=0.68%
     lat (usec): 750=0.24%, 1000=0.31%
     lat (msec): 2=0.42%, 4=0.08%, 10=0.11%, 20=0.09%, 50=0.08%
     lat (msec): 100=0.07%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=21872
  read : io=4,037MiB, bw=153MiB/s, iops=9,804, runt= 26352msec
    clat (usec): min=2, max=243, avg=14.92, stdev= 3.97
    bw (KiB/s) : min=    0, max=235008, per=98.96%, avg=155243.63, stdev=43158.00
  write: io=1,024MiB, bw=47,423KiB/s, iops=2,963, runt= 22111msec
    clat (usec): min=3, max=704K, avg=29.88, stdev=2749.86
    bw (KiB/s) : min=    0, max=52032, per=99.20%, avg=47045.11, stdev=10201.51
  cpu          : usr=6.80%, sys=0.98%, ctx=17579, majf=0, minf=1114001
  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=258365/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.25%, 20=79.13%, 50=11.58%, 100=0.02%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=238MiB/s, minb=238MiB/s, maxb=238MiB/s, mint=17177msec, maxt=17177msec
  WRITE: io=4,096MiB, aggrb=21,064KiB/s, minb=21,064KiB/s, maxb=21,064KiB/s, mint=199116msec, maxt=199116msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26352msec, maxt=26352msec
  WRITE: io=1,024MiB, aggrb=47,424KiB/s, minb=47,424KiB/s, maxb=47,424KiB/s, mint=22111msec, maxt=22111msec

Disk stats (read/write):
  sda: ios=16731/66175, merge=710/1230040, ticks=227680/115549741, in_queue=115777324, util=92.87%
95.83user 50.03system 11:11.27elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390976inputs+18759656outputs (9major+3220180minor)pagefaults 0swaps