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From: "Tummala, Sivaprasad" <Sivaprasad.Tummala@amd.com>
To: "users@dpdk.org" <users@dpdk.org>
Subject: RE: AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11
Date: Fri, 22 Apr 2022 12:49:37 +0000
Message-ID: <CY4PR12MB162343815985BF400285736386F79@CY4PR12MB1623.namprd12.prod.outlook.com> (raw)
In-Reply-To: <DM6PR02MB5017C8B3DE4B5EC022AE3085D0F79@DM6PR02MB5017.namprd02.prod.outlook.com>

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[AMD Official Use Only]

Hi Antonio,

You need to change the BIOS parameter "L3 Cache as NUMA Domain" to "Disable".
With this, each L3 cache will not be reported as a NUMA domain (/NUMA node).

Thank you!

From: Antonio Di Bacco <a.dibacco.ks@gmail.com<mailto:a.dibacco.ks@gmail.com>>
Sent: Friday, April 22, 2022 10:22 AM
To: users@dpdk.org<mailto:users@dpdk.org>
Subject: AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11

Using an  AMD EPYC 7713 64-Core Processor (there are two on the server) for a total of 128 cores.

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:

EAL: Detected CPU lcores: 128
EAL: Detected NUMA nodes: 16

NPS is able to change the number of NUMA but DPDK always detects 16 NUMA domains.
I tried with NPS1, NPS2, NPS4.




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  parent reply	other threads:[~2022-04-22 12:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-22  9:22 Antonio Di Bacco
     [not found] ` <DM6PR02MB5017C8B3DE4B5EC022AE3085D0F79@DM6PR02MB5017.namprd02.prod.outlook.com>
2022-04-22 12:49   ` Tummala, Sivaprasad [this message]
2022-04-22 15:51     ` Antonio Di Bacco

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