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=508
  read : io=4,096MiB, bw=223MiB/s, iops=14,253, runt= 18392msec
    clat (usec): min=13, max=106, avg=18.00, stdev= 2.23
    bw (KiB/s) : min=    0, max=239584, per=97.34%, avg=221996.11, stdev=38019.82
  write: io=4,096MiB, bw=21,251KiB/s, iops=1,328, runt=197361msec
    clat (usec): min=17, max=548K, avg=521.15, stdev=5668.02
    bw (KiB/s) : min=    0, max=79136, per=100.91%, avg=21445.34, stdev=13778.31
  cpu          : usr=32.63%, sys=5.41%, ctx=102909, majf=1, minf=2102341
  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=41.67%, 50=52.66%, 100=2.37%, 250=1.82%, 500=0.17%
     lat (usec): 750=0.11%, 1000=0.14%
     lat (msec): 2=0.17%, 4=0.12%, 10=0.26%, 20=0.18%, 50=0.16%
     lat (msec): 100=0.12%, 250=0.03%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=634
  read : io=4,038MiB, bw=153MiB/s, iops=9,778, runt= 26430msec
    clat (usec): min=2, max=125, avg=18.98, stdev= 5.66
    bw (KiB/s) : min=    0, max=236768, per=97.91%, avg=153191.85, stdev=35129.41
  write: io=1,024MiB, bw=48,168KiB/s, iops=3,010, runt= 21769msec
    clat (usec): min=3, max=239, avg=22.81, stdev= 4.71
    bw (KiB/s) : min=    0, max=50560, per=97.75%, avg=47083.64, stdev=7507.83
  cpu          : usr=7.40%, sys=1.56%, ctx=15020, majf=0, minf=1114903
  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=258441/65536, short=0/0
     lat (usec): 4=0.01%, 10=3.79%, 20=35.76%, 50=60.43%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=223MiB/s, minb=223MiB/s, maxb=223MiB/s, mint=18392msec, maxt=18392msec
  WRITE: io=4,096MiB, aggrb=21,252KiB/s, minb=21,252KiB/s, maxb=21,252KiB/s, mint=197361msec, maxt=197361msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=153MiB/s, minb=153MiB/s, maxb=153MiB/s, mint=26430msec, maxt=26430msec
  WRITE: io=1,024MiB, aggrb=48,169KiB/s, minb=48,169KiB/s, maxb=48,169KiB/s, mint=21769msec, maxt=21769msec

Disk stats (read/write):
  sda: ios=16658/62287, merge=783/1229720, ticks=233842/109426126, in_queue=109661193, util=92.73%
106.43user 50.47system 11:59.82elapsed 21%CPU (0avgtext+0avgdata 16861120maxresident)k
8391048inputs+18762960outputs (8major+3221099minor)pagefaults 0swaps