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=13395
  read : io=4,096MiB, bw=201MiB/s, iops=12,869, runt= 20369msec
    clat (usec): min=13, max=180, avg=18.39, stdev= 5.77
    bw (KiB/s) : min=    0, max=236832, per=97.30%, avg=200363.71, stdev=61608.25
  write: io=4,096MiB, bw=20,021KiB/s, iops=1,251, runt=209486msec
    clat (usec): min=17, max=537K, avg=568.05, stdev=6673.13
    bw (KiB/s) : min=    0, max=78624, per=101.88%, avg=20398.29, stdev=14083.49
  cpu          : usr=31.36%, sys=5.82%, ctx=123931, majf=1, minf=2102342
  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=37.23%, 50=55.75%, 100=3.67%, 250=1.52%, 500=0.47%
     lat (usec): 750=0.12%, 1000=0.14%
     lat (msec): 2=0.18%, 4=0.13%, 10=0.27%, 20=0.21%, 50=0.17%
     lat (msec): 100=0.10%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=13487
  read : io=4,038MiB, bw=154MiB/s, iops=9,884, runt= 26143msec
    clat (usec): min=2, max=442, avg=16.66, stdev= 4.86
    bw (KiB/s) : min=    0, max=233920, per=97.56%, avg=154289.23, stdev=38325.21
  write: io=1,024MiB, bw=48,139KiB/s, iops=3,008, runt= 21782msec
    clat (usec): min=2, max=135K, avg=22.92, stdev=526.22
    bw (KiB/s) : min=    0, max=51616, per=97.74%, avg=47050.84, stdev=8069.42
  cpu          : usr=6.32%, sys=1.10%, ctx=2834, majf=0, minf=1114309
  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=258410/65536, short=0/0
     lat (usec): 4=0.01%, 10=9.42%, 20=53.87%, 50=36.63%, 100=0.05%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=201MiB/s, minb=201MiB/s, maxb=201MiB/s, mint=20369msec, maxt=20369msec
  WRITE: io=4,096MiB, aggrb=20,021KiB/s, minb=20,021KiB/s, maxb=20,021KiB/s, mint=209486msec, maxt=209486msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=154MiB/s, minb=154MiB/s, maxb=154MiB/s, mint=26143msec, maxt=26143msec
  WRITE: io=1,024MiB, aggrb=48,141KiB/s, minb=48,141KiB/s, maxb=48,141KiB/s, mint=21782msec, maxt=21782msec

Disk stats (read/write):
  sda: ios=16614/73202, merge=828/1223194, ticks=255111/132476755, in_queue=132731734, util=93.09%
107.70user 49.08system 13:46.69elapsed 18%CPU (0avgtext+0avgdata 16861376maxresident)k
8390648inputs+18761408outputs (8major+3220762minor)pagefaults 0swaps