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=27871
  read : io=4,096MiB, bw=234MiB/s, iops=14,948, runt= 17537msec
    clat (usec): min=11, max=230, avg=14.79, stdev= 2.29
    bw (KiB/s) : min=    0, max=248736, per=97.23%, avg=232557.33, stdev=40421.71
  write: io=4,096MiB, bw=19,425KiB/s, iops=1,214, runt=215916msec
    clat (usec): min=14, max=507K, avg=601.34, stdev=7165.33
    bw (KiB/s) : min=    0, max=79360, per=101.73%, avg=19760.62, stdev=15205.92
  cpu          : usr=31.26%, sys=4.50%, ctx=69213, 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=49.93%, 50=46.29%, 100=0.46%, 250=1.57%, 500=0.37%
     lat (usec): 750=0.17%, 1000=0.18%
     lat (msec): 2=0.25%, 4=0.09%, 10=0.23%, 20=0.17%, 50=0.10%
     lat (msec): 100=0.11%, 250=0.08%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=27983
  read : io=4,038MiB, bw=159MiB/s, iops=10,172, runt= 25407msec
    clat (usec): min=2, max=259, avg=14.19, stdev= 3.93
    bw (KiB/s) : min=    0, max=247808, per=97.69%, avg=159002.35, stdev=43922.01
  write: io=1,024MiB, bw=49,498KiB/s, iops=3,093, runt= 21184msec
    clat (usec): min=3, max=185, avg=18.24, stdev= 4.77
    bw (KiB/s) : min=    0, max=52768, per=97.70%, avg=48359.58, stdev=10091.78
  cpu          : usr=7.45%, sys=1.15%, ctx=28147, majf=0, minf=1114528
  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=258455/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.73%, 20=81.45%, 50=9.79%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17537msec, maxt=17537msec
  WRITE: io=4,096MiB, aggrb=19,425KiB/s, minb=19,425KiB/s, maxb=19,425KiB/s, mint=215916msec, maxt=215916msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25407msec, maxt=25407msec
  WRITE: io=1,024MiB, aggrb=49,499KiB/s, minb=49,499KiB/s, maxb=49,499KiB/s, mint=21184msec, maxt=21184msec

Disk stats (read/write):
  sda: ios=16468/72495, merge=973/1224125, ticks=268224/108042962, in_queue=108311036, util=92.81%
103.11user 59.51system 11:59.10elapsed 22%CPU (0avgtext+0avgdata 16861104maxresident)k
8390776inputs+18762936outputs (9major+3220686minor)pagefaults 0swaps