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=1223
  read : io=4,096MiB, bw=234MiB/s, iops=14,957, runt= 17526msec
    clat (usec): min=11, max=178, avg=14.45, stdev= 2.47
    bw (KiB/s) : min=    0, max=245888, per=97.23%, avg=232690.67, stdev=40431.22
  write: io=4,096MiB, bw=20,004KiB/s, iops=1,250, runt=209668msec
    clat (usec): min=15, max=893K, avg=556.09, stdev=9572.57
    bw (KiB/s) : min=    0, max=79488, per=106.41%, avg=21285.99, stdev=15515.21
  cpu          : usr=32.52%, sys=4.70%, ctx=36608, 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=49.91%, 50=45.58%, 100=1.22%, 250=1.92%, 500=0.24%
     lat (usec): 750=0.06%, 1000=0.06%
     lat (msec): 2=0.11%, 4=0.16%, 10=0.31%, 20=0.19%, 50=0.14%
     lat (msec): 100=0.06%, 250=0.03%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=1489
  read : io=4,038MiB, bw=160MiB/s, iops=10,237, runt= 25244msec
    clat (usec): min=2, max=241, avg=15.08, stdev= 3.74
    bw (KiB/s) : min=    0, max=245440, per=97.67%, avg=159984.94, stdev=40481.92
  write: io=1,024MiB, bw=49,815KiB/s, iops=3,113, runt= 21049msec
    clat (usec): min=3, max=111, avg=19.66, stdev= 3.92
    bw (KiB/s) : min=    0, max=51872, per=97.76%, avg=48700.05, stdev=7747.56
  cpu          : usr=6.41%, sys=0.82%, ctx=1874, majf=0, minf=1113783
  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=258423/65536, short=0/0
     lat (usec): 4=0.01%, 10=5.68%, 20=77.90%, 50=16.39%, 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=17526msec, maxt=17526msec
  WRITE: io=4,096MiB, aggrb=20,004KiB/s, minb=20,004KiB/s, maxb=20,004KiB/s, mint=209668msec, maxt=209668msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25244msec, maxt=25244msec
  WRITE: io=1,024MiB, aggrb=49,816KiB/s, minb=49,816KiB/s, maxb=49,816KiB/s, mint=21049msec, maxt=21049msec

Disk stats (read/write):
  sda: ios=17259/62719, merge=182/1233751, ticks=244352/131220899, in_queue=131465139, util=93.62%
109.32user 50.98system 12:52.68elapsed 20%CPU (0avgtext+0avgdata 16861712maxresident)k
8390656inputs+18761720outputs (8major+3220173minor)pagefaults 0swaps