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=3355
  read : io=4,096MiB, bw=243MiB/s, iops=15,569, runt= 16837msec
    clat (usec): min=10, max=120, avg=11.91, stdev= 1.69
    bw (KiB/s) : min=    0, max=251648, per=97.13%, avg=241973.65, stdev=42910.92
  write: io=4,096MiB, bw=6,591KiB/s, iops=411, runt=636336msec
    clat (usec): min=15, max=1,848K, avg=2329.79, stdev=24473.84
    bw (KiB/s) : min=    0, max=61131, per=114.69%, avg=7559.28, stdev=11979.76
  cpu          : usr=6.09%, sys=0.70%, ctx=20825, majf=0, minf=2102317
  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=84.52%, 50=12.13%, 100=0.06%, 250=0.04%, 500=0.03%
     lat (usec): 750=0.02%, 1000=0.02%
     lat (msec): 2=0.51%, 4=1.22%, 10=0.70%, 20=0.08%, 50=0.07%
     lat (msec): 100=0.31%, 250=0.19%, 500=0.11%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=3963
  read : io=4,038MiB, bw=154MiB/s, iops=9,886, runt= 26136msec
    clat (usec): min=2, max=119, avg=17.33, stdev= 4.56
    bw (KiB/s) : min=    0, max=235328, per=97.77%, avg=154666.46, stdev=39341.06
  write: io=1,024MiB, bw=47,856KiB/s, iops=2,991, runt= 21911msec
    clat (usec): min=2, max=97,930, avg=24.31, stdev=382.48
    bw (KiB/s) : min=    0, max=51264, per=97.48%, avg=46648.73, stdev=7408.99
  cpu          : usr=4.80%, sys=0.72%, ctx=1575, majf=0, minf=1115041
  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=258402/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.02%, 20=35.89%, 50=52.07%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 100=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=243MiB/s, minb=243MiB/s, maxb=243MiB/s, mint=16837msec, maxt=16837msec
  WRITE: io=4,096MiB, aggrb=6,591KiB/s, minb=6,591KiB/s, maxb=6,591KiB/s, mint=636336msec, maxt=636336msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26136msec, maxt=26136msec
  WRITE: io=1,024MiB, aggrb=47,857KiB/s, minb=47,857KiB/s, maxb=47,857KiB/s, mint=21911msec, maxt=21911msec

Disk stats (read/write):
  sda: ios=17444/63299, merge=0/1233964, ticks=681120/179597155, in_queue=180278253, util=96.96%
67.65user 28.23system 26:30.59elapsed 6%CPU (0avgtext+0avgdata 0maxresident)k
8390672inputs+18762888outputs (32major+3223721minor)pagefaults 0swaps