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=32408
  read : io=4,096MiB, bw=237MiB/s, iops=15,191, runt= 17256msec
    clat (usec): min=11, max=174, avg=13.30, stdev= 2.33
    bw (KiB/s) : min=    0, max=248544, per=97.13%, avg=236081.37, stdev=41758.60
  write: io=4,096MiB, bw=18,907KiB/s, iops=1,181, runt=221834msec
    clat (usec): min=15, max=830K, avg=650.96, stdev=11300.74
    bw (KiB/s) : min=    0, max=81504, per=107.41%, avg=20308.38, stdev=22208.51
  cpu          : usr=29.59%, sys=3.54%, ctx=16772, 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=51.87%, 50=44.29%, 100=0.56%, 250=1.32%, 500=0.34%
     lat (usec): 750=0.26%, 1000=0.32%
     lat (msec): 2=0.46%, 4=0.08%, 10=0.14%, 20=0.11%, 50=0.08%
     lat (msec): 100=0.08%, 250=0.06%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=32671
  read : io=4,035MiB, bw=155MiB/s, iops=9,897, runt= 26093msec
    clat (usec): min=2, max=111, avg=15.90, stdev= 3.50
    bw (KiB/s) : min=    0, max=239712, per=98.40%, avg=155821.96, stdev=41483.03
  write: io=1,024MiB, bw=48,060KiB/s, iops=3,003, runt= 21818msec
    clat (usec): min=2, max=407K, avg=26.74, stdev=1589.83
    bw (KiB/s) : min=    0, max=52288, per=98.39%, avg=47288.60, stdev=8945.38
  cpu          : usr=7.43%, sys=1.14%, ctx=34310, majf=0, minf=1113477
  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=258251/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.30%, 20=77.62%, 50=19.06%, 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=17256msec, maxt=17256msec
  WRITE: io=4,096MiB, aggrb=18,907KiB/s, minb=18,907KiB/s, maxb=18,907KiB/s, mint=221834msec, maxt=221834msec

Run status group 1 (all jobs):
   READ: io=4,035MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=26093msec, maxt=26093msec
  WRITE: io=1,024MiB, aggrb=48,061KiB/s, minb=48,061KiB/s, maxb=48,061KiB/s, mint=21818msec, maxt=21818msec

Disk stats (read/write):
  sda: ios=16707/64334, merge=734/1231418, ticks=274306/100876443, in_queue=101150636, util=92.66%
95.73user 49.26system 11:52.62elapsed 20%CPU (0avgtext+0avgdata 16861280maxresident)k
8390776inputs+18755912outputs (9major+3219610minor)pagefaults 0swaps