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=29065
  read : io=4,096MiB, bw=234MiB/s, iops=14,948, runt= 17537msec
    clat (usec): min=11, max=144, avg=14.56, stdev= 2.49
    bw (KiB/s) : min=    0, max=245856, per=97.22%, avg=232535.11, stdev=40402.36
  write: io=4,096MiB, bw=19,756KiB/s, iops=1,234, runt=212298msec
    clat (usec): min=15, max=794K, avg=605.86, stdev=9903.11
    bw (KiB/s) : min=    0, max=78944, per=105.99%, avg=20940.28, stdev=20190.81
  cpu          : usr=31.42%, sys=3.97%, ctx=11275, 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=50.80%, 50=45.24%, 100=0.70%, 250=1.10%, 500=0.75%
     lat (usec): 750=0.22%, 1000=0.28%
     lat (msec): 2=0.36%, 4=0.08%, 10=0.12%, 20=0.09%, 50=0.09%
     lat (msec): 100=0.08%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=29332
  read : io=4,038MiB, bw=156MiB/s, iops=9,966, runt= 25927msec
    clat (usec): min=2, max=337, avg=14.90, stdev= 3.88
    bw (KiB/s) : min=    0, max=245184, per=98.56%, avg=157168.62, stdev=45095.73
  write: io=1,024MiB, bw=48,199KiB/s, iops=3,012, runt= 21755msec
    clat (usec): min=3, max=676K, avg=29.63, stdev=2639.07
    bw (KiB/s) : min=    0, max=52448, per=98.72%, avg=47580.41, stdev=10469.92
  cpu          : usr=7.02%, sys=1.08%, ctx=25204, majf=0, minf=1114561
  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=258409/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.40%, 20=79.86%, 50=14.72%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 750=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=19,756KiB/s, minb=19,756KiB/s, maxb=19,756KiB/s, mint=212298msec, maxt=212298msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25927msec, maxt=25927msec
  WRITE: io=1,024MiB, aggrb=48,199KiB/s, minb=48,199KiB/s, maxb=48,199KiB/s, mint=21755msec, maxt=21755msec

Disk stats (read/write):
  sda: ios=16657/63971, merge=783/1232446, ticks=246625/109489743, in_queue=109736283, util=92.78%
98.10user 46.70system 11:06.19elapsed 21%CPU (0avgtext+0avgdata 16861712maxresident)k
8390640inputs+18761224outputs (8major+3220713minor)pagefaults 0swaps