Re: [PATCH v2] net/ice: support Rx timestamp offload on vector path

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

On Fri, Oct 09, 2026 at 12:36:30AM +0000, Sandeep Penigalapati wrote:
> The ice PMD only supported Rx hardware timestamp offload
> (RTE_ETH_RX_OFFLOAD_TIMESTAMP) on the scalar Rx path. Enabling the
> offload forced a fallback from the AVX2/AVX512 vector Rx paths to the
> scalar path, causing a significant performance drop on 800 series
> adapters.
> 
> Add Rx timestamp support to the AVX2 and AVX512 vector Rx paths,
> mirroring the existing iavf implementation: the 32-bit timestamp is
> read from the flex descriptor in the vectorized loop and converted to
> 64 bits, with register rollover tracking, in a scalar pass over the
> received packets after the loop.
> 
> Advertise the timestamp offload only on the x86 vector paths that
> implement it, via a new ICE_RX_VECTOR_OFFLOAD_TS_OFFLOADS mask, so on
> Arm the request still falls back to the scalar path.
> 
> Signed-off-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

Applied to dpdk-next-net-intel.
Thanks,
/Bruce
> ---
> v2:
> - rebased to current main; fixed release notes and ice.ini conflicts
> - kept the offload check on two lines
>