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=6927
  read : io=4,096MiB, bw=228MiB/s, iops=14,581, runt= 17978msec
    clat (usec): min=11, max=413, avg=15.79, stdev= 2.75
    bw (KiB/s) : min=    0, max=246880, per=97.25%, avg=226885.33, stdev=44849.60
  write: io=4,096MiB, bw=18,000KiB/s, iops=1,125, runt=233009msec
    clat (usec): min=14, max=600K, avg=686.27, stdev=7589.83
    bw (KiB/s) : min=    0, max=66656, per=102.94%, avg=18529.47, stdev=18004.20
  cpu          : usr=28.79%, sys=4.01%, ctx=15482, majf=0, minf=2102312
  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=50.76%, 50=45.31%, 100=0.56%, 250=0.54%, 500=0.69%
     lat (usec): 750=0.08%, 1000=0.13%
     lat (msec): 2=0.94%, 4=0.24%, 10=0.24%, 20=0.13%, 50=0.18%
     lat (msec): 100=0.15%, 250=0.06%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=6931
  read : io=4,039MiB, bw=34,669KiB/s, iops=2,166, runt=119286msec
    clat (usec): min=2, max=845, avg=20.45, stdev= 9.13
    bw (KiB/s) : min=    0, max=238304, per=239.60%, avg=83066.30, stdev=77405.82
  write: io=1,024MiB, bw=9,164KiB/s, iops=572, runt=114422msec
    clat (usec): min=2, max=3,319K, avg=1330.63, stdev=53619.59
    bw (KiB/s) : min=    0, max=51200, per=234.31%, avg=21471.71, stdev=22024.16
  cpu          : usr=10.19%, sys=1.81%, ctx=3011, majf=0, minf=1128081
  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=258474/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.00%, 20=42.58%, 50=53.24%, 100=1.09%
     lat (usec): 250=0.06%, 500=0.01%, 1000=0.01%
     lat (msec): 4=0.01%, 100=0.01%, 250=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%, >=2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=228MiB/s, minb=228MiB/s, maxb=228MiB/s, mint=17978msec, maxt=17978msec
  WRITE: io=4,096MiB, aggrb=18,000KiB/s, minb=18,000KiB/s, maxb=18,000KiB/s, mint=233009msec, maxt=233009msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=34,669KiB/s, minb=34,669KiB/s, maxb=34,669KiB/s, mint=119286msec, maxt=119286msec
  WRITE: io=1,024MiB, aggrb=9,164KiB/s, minb=9,164KiB/s, maxb=9,164KiB/s, mint=114422msec, maxt=114422msec

Disk stats (read/write):
  sda: ios=18412/62256, merge=14384/1236454, ticks=252336/50497908, in_queue=50750180, util=93.52%
105.41user 51.27system 11:47.33elapsed 22%CPU (0avgtext+0avgdata 0maxresident)k
8390400inputs+18872392outputs (32major+3234138minor)pagefaults 0swaps