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=26154
  read : io=4,096MiB, bw=232MiB/s, iops=14,837, runt= 17668msec
    clat (usec): min=11, max=108, avg=15.20, stdev= 2.37
    bw (KiB/s) : min=    0, max=246944, per=97.26%, avg=230886.22, stdev=40076.65
  write: io=4,096MiB, bw=19,662KiB/s, iops=1,228, runt=213319msec
    clat (usec): min=14, max=705K, avg=581.10, stdev=8623.84
    bw (KiB/s) : min=    0, max=78720, per=105.17%, avg=20677.87, stdev=17165.07
  cpu          : usr=30.89%, sys=4.79%, ctx=38633, majf=1, minf=2102310
  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=49.72%, 50=46.01%, 100=0.89%, 250=1.56%, 500=0.38%
     lat (usec): 750=0.11%, 1000=0.13%
     lat (msec): 2=0.20%, 4=0.15%, 10=0.30%, 20=0.22%, 50=0.18%
     lat (msec): 100=0.07%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=26430
  read : io=4,036MiB, bw=150MiB/s, iops=9,628, runt= 26828msec
    clat (usec): min=2, max=177, avg=14.98, stdev= 3.77
    bw (KiB/s) : min=    0, max=245376, per=102.27%, avg=157560.29, stdev=44208.61
  write: io=1,024MiB, bw=46,125KiB/s, iops=2,882, runt= 22733msec
    clat (usec): min=3, max=1,576K, avg=43.13, stdev=6155.93
    bw (KiB/s) : min=    0, max=51808, per=102.00%, avg=47049.35, stdev=9951.58
  cpu          : usr=6.52%, sys=0.88%, ctx=4544, majf=0, minf=1114631
  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=258321/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.32%, 20=77.73%, 50=13.92%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=232MiB/s, minb=232MiB/s, maxb=232MiB/s, mint=17668msec, maxt=17668msec
  WRITE: io=4,096MiB, aggrb=19,662KiB/s, minb=19,662KiB/s, maxb=19,662KiB/s, mint=213319msec, maxt=213319msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=150MiB/s, minb=150MiB/s, maxb=150MiB/s, mint=26828msec, maxt=26828msec
  WRITE: io=1,024MiB, aggrb=46,126KiB/s, minb=46,126KiB/s, maxb=46,126KiB/s, mint=22733msec, maxt=22733msec

Disk stats (read/write):
  sda: ios=17218/62983, merge=223/1233056, ticks=258924/128703919, in_queue=128962699, util=93.43%
106.07user 52.71system 12:57.11elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390832inputs+18758264outputs (8major+3221017minor)pagefaults 0swaps