From c2e129698dd6c03a598be3084abffb38ab0c801c Mon Sep 17 00:00:00 2001 From: Qi Zhang Date: Wed, 16 Dec 2020 08:21:58 +0800 Subject: [PATCH] doc: fix some statements for ice vector PMD 1. Add descriptions for how to select avx512 datapath. 2. Add explanation for "P" in ice.ini. Fixes: 7f85d5ebcfe1 ("net/ice: add AVX512 vector path") Fixes: 271cc8c5028a ("doc: update ice features list") Cc: stable@dpdk.org Signed-off-by: Qi Zhang Acked-by: Leyi Rong --- doc/guides/nics/ice.rst | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst index a0887f129f..ccda26f82f 100644 --- a/doc/guides/nics/ice.rst +++ b/doc/guides/nics/ice.rst @@ -211,9 +211,12 @@ are chosen based on 2 conditions. - ``CPU`` On the X86 platform, the driver checks if the CPU supports AVX2. If it's supported, AVX2 paths will be chosen. If not, SSE is chosen. + If the CPU supports AVX512 and EAL argument ``--force-max-simd-bitwidth`` + is set to 512, AVX512 paths will be chosen. - ``Offload features`` - The supported HW offload features are described in the document ice_vec.ini. + The supported HW offload features are described in the document ice.ini, + A value "P" means the offload feature is not supported by vector path. If any not supported features are used, ICE vector PMD is disabled and the normal paths are chosen. -- 2.20.1