Re: [PATCH] config/x86: config support for AMD EPYC processors

[Kevin Traynor <ktraynor@redhat.com>]

On 16/10/2023 06:20, Tummala, Sivaprasad wrote:
> [AMD Official Use Only - General]
> 
> Hi DPDK Techboard,
> 
> Request to add this topic for discussion in the next techboard meeting.
> 

Hi Sivaprasad,

Are you or a representative (Ferruh?) able to attend the techboard 
meeting (3pm UTC Wednesday) to discuss this item?

thanks,
Kevin.

> Thanks & Regards,
> Sivaprasad
> 
>> -----Original Message-----
>> From: Tummala, Sivaprasad <Sivaprasad.Tummala@amd.com>
>> Sent: Monday, October 16, 2023 10:44 AM
>> To: David Marchand <david.marchand@redhat.com>
>> Cc: bruce.richardson@intel.com; konstantin.v.ananyev@yandex.ru; dev@dpdk.org;
>> dpdk-techboard <techboard@dpdk.org>; Thomas Monjalon
>> <thomas@monjalon.net>
>> Subject: RE: [PATCH] config/x86: config support for AMD EPYC processors
>>
>> [AMD Official Use Only - General]
>>
>> Caution: This message originated from an External Source. Use proper caution
>> when opening attachments, clicking links, or responding.
>>
>>
>> [AMD Official Use Only - General]
>>
>>> -----Original Message-----
>>> From: David Marchand <david.marchand@redhat.com>
>>> Sent: Friday, October 6, 2023 1:21 PM
>>> To: Tummala, Sivaprasad <Sivaprasad.Tummala@amd.com>
>>> Cc: bruce.richardson@intel.com; konstantin.v.ananyev@yandex.ru;
>>> dev@dpdk.org; dpdk-techboard <techboard@dpdk.org>; Thomas Monjalon
>>> <thomas@monjalon.net>
>>> Subject: Re: [PATCH] config/x86: config support for AMD EPYC
>>> processors
>>>
>>> Caution: This message originated from an External Source. Use proper
>>> caution when opening attachments, clicking links, or responding.
>>>
>>>
>>> On Mon, Sep 25, 2023 at 5:11 PM Sivaprasad Tummala
>>> <sivaprasad.tummala@amd.com> wrote:
>>>>
>>>> From: Sivaprasad Tummala <Sivaprasad.Tummala@amd.com>
>>>>
>>>> By default, max lcores are limited to 128 for x86 platforms.
>>>> On AMD EPYC processors, this limit needs to be increased to leverage
>>>> all the cores.
>>>>
>>>> The patch adjusts the limit specifically for native compilation on
>>>> AMD EPYC CPUs.
>>>>
>>>> Signed-off-by: Sivaprasad Tummala <Sivaprasad.Tummala@amd.com>
>>>
>>> This patch is a revamp of
>>>
>> http://inbox.dpdk.org/dev/BY5PR12MB3681C3FC6676BC03F0B42CCC96789@BY5PR
>>> 12MB3681.namprd12.prod.outlook.com/
>>> for which a discussion at techboard is supposed to have taken place.
>>> But I didn't find a trace of it.
>>>
>>> One option that had been discussed in the previous thread was to
>>> increase the max number of cores for x86.
>>> I am unclear if this option has been properly evaluated/debatted.
>>>
>>> Can the topic be brought again at techboard?
>>
>> Hi David,
>>
>> The patch is intended to detect AMD platforms and enable all CPU cores by default
>> on native builds.
>>
>> As an optimization for memory footprint, users can override this by specifying "-
>> Dmax_lcores" option based on DPDK lcores required for their usecases.
>>
>> Sure, will request to add this topic for discussion at techboard.
>>>
>>> Thanks.
>>>
>>> --
>>> David Marchand
>