AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11

AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11

[Antonio Di Bacco]

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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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RE: AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11

[Tummala, Sivaprasad]

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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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Re: AMD NPS bios change is is not reflected onto NUMA domains detected by DPDK 21.11

[Antonio Di Bacco]

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This was it !!!

Thanks.

Il giorno ven 22 apr 2022 alle ore 14:49 Tummala, Sivaprasad <
Sivaprasad.Tummala@amd.com> ha scritto:

> [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>
> *Sent:* Friday, April 22, 2022 10:22 AM
> *To:* 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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