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=25389
  read : io=4,096MiB, bw=238MiB/s, iops=15,202, runt= 17243msec
    clat (usec): min=10, max=1,191, avg=12.94, stdev= 5.62
    bw (KiB/s) : min=    0, max=250336, per=97.11%, avg=236235.89, stdev=43682.52
  write: io=4,096MiB, bw=18,887KiB/s, iops=1,180, runt=222073msec
    clat (usec): min=15, max=938K, avg=624.95, stdev=10842.91
    bw (KiB/s) : min=    0, max=78336, per=106.58%, avg=20129.67, stdev=16667.01
  cpu          : usr=32.23%, sys=4.17%, ctx=15388, 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=50.38%, 50=45.30%, 100=1.05%, 250=1.21%, 500=0.82%
     lat (usec): 750=0.15%, 1000=0.19%
     lat (msec): 2=0.25%, 4=0.09%, 10=0.16%, 20=0.13%, 50=0.09%
     lat (msec): 100=0.15%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=22705
  read : io=4,035MiB, bw=156MiB/s, iops=10,010, runt= 25797msec
    clat (usec): min=2, max=236, avg=14.44, stdev= 3.76
    bw (KiB/s) : min=    0, max=243808, per=99.50%, avg=159363.57, stdev=42798.13
  write: io=1,024MiB, bw=48,323KiB/s, iops=3,020, runt= 21699msec
    clat (usec): min=2, max=729K, avg=30.35, stdev=2847.53
    bw (KiB/s) : min=    0, max=51712, per=99.41%, avg=48038.95, stdev=8922.90
  cpu          : usr=6.65%, sys=0.93%, ctx=15268, majf=0, minf=1113423
  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=258245/65536, short=0/0
     lat (usec): 4=0.01%, 10=10.44%, 20=76.34%, 50=13.19%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 750=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=238MiB/s, minb=238MiB/s, maxb=238MiB/s, mint=17243msec, maxt=17243msec
  WRITE: io=4,096MiB, aggrb=18,887KiB/s, minb=18,887KiB/s, maxb=18,887KiB/s, mint=222073msec, maxt=222073msec

Run status group 1 (all jobs):
   READ: io=4,035MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25797msec, maxt=25797msec
  WRITE: io=1,024MiB, aggrb=48,325KiB/s, minb=48,325KiB/s, maxb=48,325KiB/s, mint=21699msec, maxt=21699msec

Disk stats (read/write):
  sda: ios=16653/62776, merge=788/1233000, ticks=258477/120231781, in_queue=120490142, util=93.38%
102.60user 48.90system 11:33.59elapsed 21%CPU (0avgtext+0avgdata 16861712maxresident)k
8390608inputs+18756184outputs (8major+3219677minor)pagefaults 0swaps