[dpdk-users] pktgen-dpdk runts when start size is 64

[Bichan.Lu]

Hi,

OS: CentOS 7.5.1804
Pktgen version: pktgen-3.5.8
DPDK verison: dpdk-18.08

I use the pktgen in follows command. When I start pktgen, default PktSize is 64, in the command I sad:

./pktgen -l 0-4 -n 3 -- -P -m "[1:3].0,[2:4].1"
Pktgen:/> start all

Link State        :        <UP-1000-FD>        <UP-1000-FD>     ----TotalRate----
Pkts/s Max/Rx     :     1487853/1487844     1491609/1491602       2979462/2979446
       Max/Tx     :     1491607/1491606     1487855/1487841       2979459/2979447
MBits/s Rx/Tx     :            999/1002            1002/999             2002/2002
Broadcast         :                   0                   0
Multicast         :                   0                   0
  64 Bytes        :                   0                   0
  65-127          :                   0                   0
  128-255         :                   0                   0
  256-511         :                   0                   0
  512-1023        :                   0                   0
  1024-1518       :                   0                   0
Runts/Jumbos      :           8889515/0           8913610/0
Errors Rx/Tx      :                 0/0                 0/0
......< shown parts of pktgen >.....

Then will be get Runts.
I tried when size is 68, range will be in [64 Bytes], and no runts.
Pktgen:/> set 0 size 68
Pktgen:/> set 1 size 68
Pktgen:/> start all

I guess it may related about range, could help to check?
Thanks.

Best regards,
Bichan.Lu