E810-C Cannot do 100 Gbps for 64B packets over DPDK

[sa_10]

Hi, I am trying to benchmark 100Gbps networking with a pair of E810-C NICs.

While trying to generate 100Gbps traffic using pktgen dpdk and my own program, the maximum TX bandwidth is limited to 82.5 gbps when using 64B packets, and does not scale with the number of cores. The setup can sustain 100gbps traffic with 128B packets and larger.

Relevant System Information:

CPU :  Intel(R) Xeon(R) Gold 6414U

NIC:  Intel Corporation Ethernet Controller E810-C for QSFP (rev 02)

DPDK Version 22.07.0

Kernel Version 5.15.0-86-generic

 ice_load_pkg_type Active package is: 1.3.35.0

I have also tried compiling DPDK with 

RTE_LIBRTE_ICE_16BYTE_RX_DESC=y

[IntelSupport]

Hello sa_10,

Thank you for posting in Intel Communities.

We regret to inform you that our team does not handle this type of request.

For support with DPDK we will need to redirect you.

Kindly refer to DPDK.org or open an IPS case at IPS Support

After registration, you will be able to open a case on the Intel® Premier Support (IPS) platform and your request will be handled by one of our engineers as soon as possible. 

Thus, we will proceed to close the thread here.

Regards,

Hayat

Intel Customer Support