Hi Ayshathul,

I think the best is to follow
https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf

Did you check with ethtool or similar the actual connection speed? ethtool
linux-nic-name | grep Speed

Maybe your module limits it to 10Gbps. In case try to disable
auto-negotiation

 

Regards,

               Ernesto

 

From: Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com> 
Sent: Friday, February 13, 2026 07:36
To: users@dpdk.org
Cc: dev <dev@dpdk.org>; yasu1976@gmail.com
Subject: Guidance Required to Improve Throughput on ConnectX-7 (1x400G) with
DPDK v23.07

 

Dear Team,

I hope this message finds you well.

I am currently performing testing on ConnectX-7 with 1x400G hardware using
DPDK v23.07. However, I am unable to achieve data transfer rates beyond 10
Gbps. While reviewing the DPDK mailing list, I came across your previous
responses in the related discussion
(https://mails.dpdk.org/archives/users/2024-July/007767.html), where you
mentioned achieving throughput of around 250 Gbps and above.

Could you kindly advise on the configuration changes or optimizations
required to improve throughput in this setup?

For reference, I am using an OSFP loopback module for testing, where the
same port is used for both transmission and reception (single-port loopback
setup).

CX-7 Firmware: 28.45.1200

CPU : Intel(R) Core(TM) i7-14700

Command used : sudo ./build/app/dpdk-testpmd -a 01:00.0 -- -i

I would greatly appreciate your guidance.

Thank you in advance, and I look forward to your response.

Thanks and regards,
Ayshathul Thuhara