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--></style></head><body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Hi </span><span style='color:black'>Ayshathul</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>I think the best is to follow <a href="https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf">https://fast.dpdk.org/doc/perf/DPDK_23_11_NVIDIA_NIC_performance_report.pdf</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Did you check with ethtool or similar the actual connection speed? ethtool linux-nic-name | grep Speed<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Maybe your module limits it to 10Gbps. In case try to disable auto-negotiation<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Ernesto<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Ayshathul Thuhara <ayshathul.thuhara@iwave-global.com> <br><b>Sent:</b> Friday, February 13, 2026 07:36<br><b>To:</b> users@dpdk.org<br><b>Cc:</b> dev <dev@dpdk.org>; yasu1976@gmail.com<br><b>Subject:</b> Guidance Required to Improve Throughput on ConnectX-7 (1x400G) with DPDK v23.07<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>Dear Team,<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>I hope this message finds you well.<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>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 (<a href="https://mails.dpdk.org/archives/users/2024-July/007767.html" target="_new" id=OWAe131b2f8-ca05-2ff3-d67e-40e6b9de2cd3>https://mails.dpdk.org/archives/users/2024-July/007767.html</a>), where you mentioned achieving throughput of around 250 Gbps and above.<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>Could you kindly advise on the configuration changes or optimizations required to improve throughput in this setup?<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>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).<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>CX-7 Firmware: 28.45.1200</span></b><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>CPU : Intel(R) Core(TM) i7-14700</span></b><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>Command used : sudo ./build/app/dpdk-testpmd -a 01:00.0 -- -i</span></b><span style='color:black'><o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>I would greatly appreciate your guidance.<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>Thank you in advance, and I look forward to your response.<o:p></o:p></span></p></div><div style='margin-top:12.0pt;margin-bottom:12.0pt'><p class=MsoNormal><span style='color:black'>Thanks and regards,<br>Ayshathul Thuhara<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div></div></body></html>