[dpdk-users] Any way to get more that 40Mpps with 64bytes using a XL710 40Gb nic

[Mauricio Valdueza]

Hi Guys;

I am testing a Fortville 40Gb nic with PKTgen

I see linerate in 40Gb with 156B packet size, but once I decrease size, linerate is far away

WITH 158B
Link State        :       <UP-40000-FD>     ----TotalRate----
Pkts/s Max/Rx     :                 0/0                   0/0
       Max/Tx     :   28090480/28089840     28090480/28089840
MBits/s Rx/Tx     :             0/40000               0/40000
-----------------------------------------------------------------------------------------------

WITH 128B
Link State        :       <UP-40000-FD>     ----TotalRate----
Pkts/s Max/Rx     :                 0/0                   0/0
       Max/Tx     :   33784179/33783908     33784179/33783908
MBits/s Rx/Tx     :             0/40000               0/40000
------------------------------------------------------------------------------------------------

With 64B
Link State        :       <UP-40000-FD>     ----TotalRate----
Pkts/s Max/Rx     :                 0/0                   0/0
       Max/Tx     :   35944587/35941680     35944587/35941680
MBits/s Rx/Tx     :             0/24152               0/24152
----------------------------------------------------------------------------------------------

Should I run any optimization?

My environment is:

•VMware ESXi version:           6.5.0, 4887370
•Exact NIC version:                 Intel Corporation XL710 for 40GbE QSFP+
•NIC driver version:                i40en version 1.3.1
•Server Vendor:                      Dell
•Server Make:                        Dell Inc. PowerEdge R730
•CPU Model:  I                        ntel(R) Xeon(R) CPU E5-2697 v3 @ 2.60GHz
•Huge pages size:                   2M
•Test VM: What is it?             Ubuntu 16.04
• DPDK is compiled there?     dpdk-17.08
•Test traffic kind: IP/UDP?     Both tested
Traffic generator: Intel pktgen version?  pktgen-3.4.1


I am executing:

sudo ./app/x86_64-native-linuxapp-gcc/pktgen -c 0xff n 3 --proc-type auto --socket-mem 9096 -- -m "[1:2-7].0"  --crc-strip


Thanks in advance


mauricio