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<p class="msipheadera4477989" style="margin:0in"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:blue">[AMD Official Use Only]</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-IE">Hi Antonio, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:Klavika-Regular">You need to change the BIOS parameter “L3 Cache as NUMA Domain” to “Disable”.
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-family:Klavika-Regular">With this, each L3 cache will not be reported as a NUMA domain (/NUMA node). </span><span lang="EN-IE"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-IE">Thank you!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
<p class="MsoNormal"><b>From:</b> Antonio Di Bacco <<a href="mailto:a.dibacco.ks@gmail.com">a.dibacco.ks@gmail.com</a>>
<br>
<b>Sent:</b> Friday, April 22, 2022 10:22 AM<br>
<b>To:</b> <a href="mailto:users@dpdk.org">users@dpdk.org</a><br>
<b>Subject:</b> AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE">Using an AMD EPYC 7713 64-Core Processor (there are two on the server) for a total of 128 cores. <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE">If I change the NPS (numa per socket) in BIOS and power cycle the system and the I launch a DPDK application, I always get this message:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE">EAL: Detected CPU lcores: 128<br>
EAL: Detected NUMA nodes: 16<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE">NPS is able to change the number of NUMA but DPDK always detects 16 NUMA domains.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE">I tried with NPS1, NPS2, NPS4.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-IE"><o:p> </o:p></span></p>
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