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=21257
  read : io=4,096MiB, bw=234MiB/s, iops=14,979, runt= 17500msec
    clat (usec): min=11, max=148, avg=14.36, stdev= 2.58
    bw (KiB/s) : min=    0, max=247008, per=97.07%, avg=232659.20, stdev=41019.47
  write: io=4,096MiB, bw=19,554KiB/s, iops=1,222, runt=214496msec
    clat (usec): min=14, max=870K, avg=579.68, stdev=8891.14
    bw (KiB/s) : min=    0, max=79136, per=104.25%, avg=20385.34, stdev=14916.91
  cpu          : usr=31.20%, sys=4.81%, ctx=34659, 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=50.22%, 50=45.78%, 100=0.67%, 250=1.69%, 500=0.34%
     lat (usec): 750=0.07%, 1000=0.07%
     lat (msec): 2=0.15%, 4=0.19%, 10=0.32%, 20=0.21%, 50=0.17%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=21514
  read : io=4,037MiB, bw=160MiB/s, iops=10,210, runt= 25305msec
    clat (usec): min=2, max=147, avg=14.40, stdev= 3.85
    bw (KiB/s) : min=    0, max=248064, per=97.83%, avg=159835.61, stdev=42467.91
  write: io=1,024MiB, bw=49,580KiB/s, iops=3,098, runt= 21149msec
    clat (usec): min=2, max=148, avg=18.51, stdev= 4.41
    bw (KiB/s) : min=    0, max=52992, per=97.64%, avg=48412.28, stdev=9140.94
  cpu          : usr=6.33%, sys=0.84%, ctx=2689, majf=0, minf=1114783
  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=258383/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.36%, 20=81.10%, 50=10.51%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17500msec, maxt=17500msec
  WRITE: io=4,096MiB, aggrb=19,554KiB/s, minb=19,554KiB/s, maxb=19,554KiB/s, mint=214496msec, maxt=214496msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25305msec, maxt=25305msec
  WRITE: io=1,024MiB, aggrb=49,581KiB/s, minb=49,581KiB/s, maxb=49,581KiB/s, mint=21149msec, maxt=21149msec

Disk stats (read/write):
  sda: ios=17229/62443, merge=212/1233837, ticks=256061/135546085, in_queue=135802003, util=93.63%
107.56user 52.00system 13:10.10elapsed 20%CPU (0avgtext+0avgdata 16861728maxresident)k
8390968inputs+18760184outputs (9major+3221220minor)pagefaults 0swaps