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=31929
  read : io=4,096MiB, bw=235MiB/s, iops=15,009, runt= 17465msec
    clat (usec): min=11, max=199, avg=14.26, stdev= 2.57
    bw (KiB/s) : min=    0, max=246752, per=97.09%, avg=233161.14, stdev=41187.45
  write: io=4,096MiB, bw=21,041KiB/s, iops=1,315, runt=199334msec
    clat (usec): min=14, max=1,012K, avg=562.20, stdev=9704.70
    bw (KiB/s) : min=    0, max=79360, per=106.28%, avg=22362.13, stdev=21701.58
  cpu          : usr=31.72%, sys=4.17%, ctx=33606, 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=50.23%, 50=45.91%, 100=0.59%, 250=1.27%, 500=0.54%
     lat (usec): 750=0.23%, 1000=0.31%
     lat (msec): 2=0.40%, 4=0.07%, 10=0.12%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=32195
  read : io=4,038MiB, bw=153MiB/s, iops=9,791, runt= 26391msec
    clat (usec): min=2, max=312, avg=15.41, stdev= 4.08
    bw (KiB/s) : min=    0, max=246720, per=99.04%, avg=155159.15, stdev=45521.43
  write: io=1,024MiB, bw=47,348KiB/s, iops=2,959, runt= 22146msec
    clat (usec): min=2, max=839K, avg=33.24, stdev=3275.46
    bw (KiB/s) : min=    0, max=51488, per=99.26%, avg=47000.89, stdev=10586.28
  cpu          : usr=6.77%, sys=0.90%, ctx=3144, majf=0, minf=1114779
  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=258403/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.47%, 20=77.11%, 50=17.39%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=235MiB/s, minb=235MiB/s, maxb=235MiB/s, mint=17465msec, maxt=17465msec
  WRITE: io=4,096MiB, aggrb=21,041KiB/s, minb=21,041KiB/s, maxb=21,041KiB/s, mint=199334msec, maxt=199334msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26391msec, maxt=26391msec
  WRITE: io=1,024MiB, aggrb=47,349KiB/s, minb=47,349KiB/s, maxb=47,349KiB/s, mint=22146msec, maxt=22146msec

Disk stats (read/write):
  sda: ios=16725/64074, merge=715/1232306, ticks=230637/119737984, in_queue=119968508, util=92.89%
96.87user 49.19system 11:18.27elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390784inputs+18760976outputs (9major+3220967minor)pagefaults 0swaps