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=15609
  read : io=4,096MiB, bw=229MiB/s, iops=14,624, runt= 17925msec
    clat (usec): min=11, max=104, avg=16.30, stdev= 2.00
    bw (KiB/s) : min=    0, max=246336, per=97.11%, avg=227224.00, stdev=39230.22
  write: io=4,096MiB, bw=19,356KiB/s, iops=1,209, runt=216692msec
    clat (usec): min=14, max=911K, avg=637.84, stdev=11798.05
    bw (KiB/s) : min=    0, max=83776, per=108.57%, avg=21014.90, stdev=23952.82
  cpu          : usr=29.51%, sys=3.63%, ctx=28983, 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=51.39%, 50=44.96%, 100=0.36%, 250=1.26%, 500=0.38%
     lat (usec): 750=0.28%, 1000=0.36%
     lat (msec): 2=0.50%, 4=0.07%, 10=0.12%, 20=0.10%, 50=0.07%
     lat (msec): 100=0.07%, 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=15713
  read : io=4,038MiB, bw=158MiB/s, iops=10,138, runt= 25492msec
    clat (usec): min=2, max=159, avg=15.50, stdev= 3.61
    bw (KiB/s) : min=    0, max=246144, per=98.03%, avg=159023.69, stdev=42687.95
  write: io=1,024MiB, bw=48,982KiB/s, iops=3,061, runt= 21407msec
    clat (usec): min=3, max=56,233, avg=21.61, stdev=219.61
    bw (KiB/s) : min=    0, max=50976, per=97.65%, avg=47834.05, stdev=7904.22
  cpu          : usr=7.53%, sys=1.12%, ctx=41959, majf=0, minf=1114628
  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=258452/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.21%, 20=76.47%, 50=21.29%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 100=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=229MiB/s, minb=229MiB/s, maxb=229MiB/s, mint=17925msec, maxt=17925msec
  WRITE: io=4,096MiB, aggrb=19,356KiB/s, minb=19,356KiB/s, maxb=19,356KiB/s, mint=216692msec, maxt=216692msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25492msec, maxt=25492msec
  WRITE: io=1,024MiB, aggrb=48,984KiB/s, minb=48,984KiB/s, maxb=48,984KiB/s, mint=21407msec, maxt=21407msec

Disk stats (read/write):
  sda: ios=16778/66137, merge=662/1230394, ticks=259828/99390646, in_queue=99650376, util=92.45%
94.53user 54.95system 11:46.45elapsed 21%CPU (0avgtext+0avgdata 16861280maxresident)k
8390648inputs+18762008outputs (8major+3220729minor)pagefaults 0swaps