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=4764
  read : io=4,096MiB, bw=240MiB/s, iops=15,330, runt= 17099msec
    clat (usec): min=10, max=111, avg=13.01, stdev= 1.78
    bw (KiB/s) : min=    0, max=250432, per=97.14%, avg=238281.14, stdev=41670.60
  write: io=4,096MiB, bw=23,372KiB/s, iops=1,460, runt=179455msec
    clat (usec): min=13, max=883K, avg=587.06, stdev=8990.31
    bw (KiB/s) : min=    0, max=88495, per=105.35%, avg=24621.30, stdev=18956.06
  cpu          : usr=19.74%, sys=2.68%, ctx=58764, 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=94.77%, 50=1.85%, 100=0.27%, 250=0.14%, 500=0.13%
     lat (usec): 750=0.19%, 1000=0.22%
     lat (msec): 2=1.05%, 4=0.75%, 10=0.15%, 20=0.18%, 50=0.15%
     lat (msec): 100=0.10%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=4961
  read : io=4,039MiB, bw=158MiB/s, iops=10,109, runt= 25572msec
    clat (usec): min=2, max=467, avg=12.65, stdev= 3.44
    bw (KiB/s) : min=    0, max=249696, per=100.28%, avg=162200.00, stdev=44921.27
  write: io=1,024MiB, bw=48,877KiB/s, iops=3,054, runt= 21453msec
    clat (usec): min=2, max=979K, avg=31.67, stdev=3825.22
    bw (KiB/s) : min=    0, max=53920, per=100.51%, avg=49130.29, stdev=9715.94
  cpu          : usr=6.58%, sys=0.69%, ctx=4224, majf=0, minf=1114656
  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=258513/65536, short=0/0
     lat (usec): 4=0.01%, 10=13.52%, 20=84.58%, 50=1.80%, 100=0.09%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 1000=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=240MiB/s, minb=240MiB/s, maxb=240MiB/s, mint=17099msec, maxt=17099msec
  WRITE: io=4,096MiB, aggrb=23,372KiB/s, minb=23,372KiB/s, maxb=23,372KiB/s, mint=179455msec, maxt=179455msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=158MiB/s, minb=158MiB/s, maxb=158MiB/s, mint=25572msec, maxt=25572msec
  WRITE: io=1,024MiB, aggrb=48,879KiB/s, minb=48,879KiB/s, maxb=48,879KiB/s, mint=21453msec, maxt=21453msec

Disk stats (read/write):
  sda: ios=16949/63374, merge=493/1233393, ticks=223131/120784439, in_queue=121007506, util=93.12%
66.94user 34.74system 11:10.84elapsed 15%CPU (0avgtext+0avgdata 16861648maxresident)k
8390976inputs+18764304outputs (9major+3220803minor)pagefaults 0swaps