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=30411
  read : io=4,096MiB, bw=231MiB/s, iops=14,757, runt= 17763msec
    clat (usec): min=12, max=120, avg=15.59, stdev= 2.39
    bw (KiB/s) : min=    0, max=245472, per=97.26%, avg=229669.33, stdev=39947.07
  write: io=4,096MiB, bw=19,384KiB/s, iops=1,211, runt=216371msec
    clat (usec): min=14, max=835K, avg=627.46, stdev=10735.57
    bw (KiB/s) : min=    0, max=79456, per=108.14%, avg=20961.05, stdev=22411.01
  cpu          : usr=30.16%, sys=3.76%, ctx=34987, majf=1, minf=2102311
  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=50.52%, 50=45.65%, 100=0.56%, 250=1.22%, 500=0.48%
     lat (usec): 750=0.26%, 1000=0.35%
     lat (msec): 2=0.41%, 4=0.07%, 10=0.14%, 20=0.11%, 50=0.08%
     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=30686
  read : io=4,037MiB, bw=158MiB/s, iops=10,130, runt= 25504msec
    clat (usec): min=2, max=233, avg=15.23, stdev= 3.91
    bw (KiB/s) : min=    0, max=245376, per=97.65%, avg=158279.53, stdev=40269.23
  write: io=1,024MiB, bw=49,291KiB/s, iops=3,080, runt= 21273msec
    clat (usec): min=3, max=108, avg=20.22, stdev= 4.12
    bw (KiB/s) : min=    0, max=52320, per=97.70%, avg=48160.74, stdev=8176.55
  cpu          : usr=7.47%, sys=1.16%, ctx=29099, majf=0, minf=1114009
  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=258372/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.42%, 20=77.45%, 50=17.11%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=231MiB/s, minb=231MiB/s, maxb=231MiB/s, mint=17763msec, maxt=17763msec
  WRITE: io=4,096MiB, aggrb=19,384KiB/s, minb=19,384KiB/s, maxb=19,384KiB/s, mint=216371msec, maxt=216371msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25504msec, maxt=25504msec
  WRITE: io=1,024MiB, aggrb=49,292KiB/s, minb=49,292KiB/s, maxb=49,292KiB/s, mint=21273msec, maxt=21273msec

Disk stats (read/write):
  sda: ios=16725/64599, merge=716/1231634, ticks=264064/101511234, in_queue=101775194, util=92.50%
96.76user 53.86system 11:49.40elapsed 21%CPU (0avgtext+0avgdata 16861280maxresident)k
8390640inputs+18759784outputs (8major+3220120minor)pagefaults 0swaps