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=2888
  read : io=4,096MiB, bw=236MiB/s, iops=15,100, runt= 17360msec
    clat (usec): min=11, max=169, avg=14.07, stdev= 2.29
    bw (KiB/s) : min=    0, max=249632, per=97.19%, avg=234831.54, stdev=41256.70
  write: io=4,096MiB, bw=24,194KiB/s, iops=1,512, runt=173360msec
    clat (usec): min=15, max=332K, avg=564.68, stdev=6273.31
    bw (KiB/s) : min=    0, max=88800, per=100.98%, avg=24431.15, stdev=16392.27
  cpu          : usr=20.46%, sys=3.06%, ctx=17944, majf=1, minf=2108566
  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=66.63%, 50=29.99%, 100=0.14%, 250=0.24%, 500=0.14%
     lat (usec): 750=0.18%, 1000=0.20%
     lat (msec): 2=1.17%, 4=0.78%, 10=0.12%, 20=0.12%, 50=0.13%
     lat (msec): 100=0.13%, 250=0.05%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=3077
  read : io=4,037MiB, bw=164MiB/s, iops=10,499, runt= 24610msec
    clat (usec): min=2, max=483, avg=13.41, stdev= 3.71
    bw (KiB/s) : min=    0, max=247200, per=97.95%, avg=164556.41, stdev=40306.54
  write: io=1,024MiB, bw=51,018KiB/s, iops=3,188, runt= 20553msec
    clat (usec): min=3, max=3,047, avg=17.99, stdev=13.58
    bw (KiB/s) : min=    0, max=55200, per=97.31%, avg=49645.67, stdev=7946.04
  cpu          : usr=7.07%, sys=0.84%, ctx=1676, majf=0, minf=1117142
  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=258396/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.58%, 20=80.69%, 50=5.67%, 100=0.05%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 2=0.01%, 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17360msec, maxt=17360msec
  WRITE: io=4,096MiB, aggrb=24,194KiB/s, minb=24,194KiB/s, maxb=24,194KiB/s, mint=173360msec, maxt=173360msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=164MiB/s, minb=164MiB/s, maxb=164MiB/s, mint=24610msec, maxt=24610msec
  WRITE: io=1,024MiB, aggrb=51,018KiB/s, minb=51,018KiB/s, maxb=51,018KiB/s, mint=20553msec, maxt=20553msec

Disk stats (read/write):
  sda: ios=17076/62005, merge=365/1234408, ticks=276945/99341551, in_queue=99618446, util=92.56%
67.13user 31.67system 10:37.24elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390816inputs+18835320outputs (8major+3229413minor)pagefaults 0swaps