Hi Ernesto, As an additional observation, I tested the setup using iperf3 and was able to achieve throughput of approximately 92~95 Gbps. However, when running the DPDK-Testpmd application, the throughput does not reach similar values. Thanks and regards, Ayshathul Thuhara
________________________________ From: Ayshathul Thuhara <[email protected]> Sent: 13 February 2026 14:24 To: Ernesto Ruffini <[email protected]> Cc: 'dev' <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: Guidance Required to Improve Throughput on ConnectX-7 (1x400G) with DPDK v23.07 Hi Ernesto, Thankyou for the suggestion. I will look into "https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf"; , but here the tests uses external device for traffic generator. Yes, with ethtool it shows 400Gbps. The module can support upto 100Gbps. But it should have increased more than 10Gbps. I will disable AN and check once. Thanks and regards, Ayshathul Thuhara ________________________________ From: Ernesto Ruffini <[email protected]> Sent: 13 February 2026 14:19 To: Ayshathul Thuhara <[email protected]>; [email protected] <[email protected]> Cc: 'dev' <[email protected]>; [email protected] <[email protected]> Subject: RE: Guidance Required to Improve Throughput on ConnectX-7 (1x400G) with DPDK v23.07 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 <[email protected]> Sent: Friday, February 13, 2026 07:36 To: [email protected] Cc: dev <[email protected]>; [email protected] 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
