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=18874
  read : io=4,096MiB, bw=237MiB/s, iops=15,167, runt= 17283msec
    clat (usec): min=10, max=175, avg=13.80, stdev= 1.98
    bw (KiB/s) : min=    0, max=250720, per=97.18%, avg=235851.89, stdev=41482.76
  write: io=4,096MiB, bw=23,919KiB/s, iops=1,494, runt=175350msec
    clat (usec): min=15, max=317K, avg=571.18, stdev=6319.43
    bw (KiB/s) : min=    0, max=87680, per=101.07%, avg=24175.63, stdev=16325.65
  cpu          : usr=20.38%, sys=3.06%, ctx=18407, majf=1, minf=2108715
  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=66.69%, 50=29.94%, 100=0.11%, 250=0.26%, 500=0.13%
     lat (usec): 750=0.18%, 1000=0.20%
     lat (msec): 2=1.19%, 4=0.75%, 10=0.12%, 20=0.13%, 50=0.12%
     lat (msec): 100=0.12%, 250=0.06%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=19067
  read : io=4,038MiB, bw=160MiB/s, iops=10,237, runt= 25241msec
    clat (usec): min=2, max=137, avg=14.06, stdev= 3.46
    bw (KiB/s) : min=    0, max=244352, per=97.63%, avg=159928.47, stdev=42252.98
  write: io=1,024MiB, bw=49,998KiB/s, iops=3,124, runt= 20972msec
    clat (usec): min=2, max=314K, avg=23.81, stdev=1225.32
    bw (KiB/s) : min=    0, max=52288, per=97.64%, avg=48816.60, stdev=9130.00
  cpu          : usr=7.36%, sys=0.88%, ctx=949, majf=0, minf=1115901
  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=258413/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.10%, 20=75.88%, 50=10.99%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=237MiB/s, minb=237MiB/s, maxb=237MiB/s, mint=17283msec, maxt=17283msec
  WRITE: io=4,096MiB, aggrb=23,919KiB/s, minb=23,919KiB/s, maxb=23,919KiB/s, mint=175350msec, maxt=175350msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25241msec, maxt=25241msec
  WRITE: io=1,024MiB, aggrb=49,999KiB/s, minb=49,999KiB/s, maxb=49,999KiB/s, mint=20972msec, maxt=20972msec

Disk stats (read/write):
  sda: ios=17065/63038, merge=376/1234157, ticks=276976/96436642, in_queue=96713573, util=92.61%
67.63user 33.29system 10:34.83elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390688inputs+18830576outputs (7major+3228296minor)pagefaults 0swaps