Re: [PATCH 3/4] net/ice: remove SSE vector path

[Bruce Richardson <bruce.richardson@intel.com>]

On Tue, Aug 26, 2025 at 12:31:26PM +0500, Khadem Ullah wrote:
>    Hi Ciara Loftus,
>    We may need some legacy support for the SSE path for earlier systems.
>    Or it will not be a problem ?
>    As you specified that modern x86 systems all support AVX2, if not
>    AVX-512.
>    Still, we might need some type of support for the SSE path.
>    Best Regards,
>    Khadem

Hi Kadem,

can you perhaps share what systems you are using that do not have AVX2
support? Do you do new deployments with latest DPDK on those systems?
However, if it helps, we can defer this patch till after 25.11
release, so that we have one more LTS with SSE support still in it. That
would mean that we have a supported DPDK release with SSE in it until
potentially end of 2028. As it stands, even if this patch goes into the
release, 24.11 will be supported till end of 2027.

/Bruce

>    On Mon, Aug 25, 2025 at 5:36 PM Ciara Loftus
>    <[1]ciara.loftus@intel.com> wrote:
> 
>      Modern x86 systems all support AVX2, if not AVX-512, so the SSE path
>      is no longer widely used. This change will not result in any feature
>      loss, as in the rare cases where the SSE path would have been used
>      in
>      the absence of AVX2 or AVX-512, the fallback scalar path will be
>      used
>      which has feature parity with SSE.
>      Signed-off-by: Ciara Loftus <[2]ciara.loftus@intel.com>
>      ---
> 
> References
> 
>    1. mailto:ciara.loftus@intel.com
>    2. mailto:ciara.loftus@intel.com