From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 5DEF2A09EF for ; Wed, 16 Dec 2020 01:17:41 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 1ABE1CA5D; Wed, 16 Dec 2020 01:17:40 +0100 (CET) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by dpdk.org (Postfix) with ESMTP id CDD34CA5D; Wed, 16 Dec 2020 01:17:37 +0100 (CET) IronPort-SDR: soL31Wepx92dUE6Txa91P4PZwAFaD81sDfcvuAhrO99lUdqaYrhVQlxYN8Ae8O4dvDcnr0GusQ 3IhdQUE6xtuQ== X-IronPort-AV: E=McAfee;i="6000,8403,9836"; a="239072141" X-IronPort-AV: E=Sophos;i="5.78,423,1599548400"; d="scan'208";a="239072141" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Dec 2020 16:17:35 -0800 IronPort-SDR: p1anioG/xLp0/eLgdX7pStRFC3hVfVdSnO/J8o0T7ONs/f7qZ4u5W8jR4L48AIhbSm5kkbYZWG 5P65RunT+NBQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,423,1599548400"; d="scan'208";a="337874310" Received: from dpdk51.sh.intel.com ([10.67.111.142]) by fmsmga008.fm.intel.com with ESMTP; 15 Dec 2020 16:17:31 -0800 From: Qi Zhang To: reyi.rong@intel.com Cc: ferruh.yigit@intel.com, dev@dpdk.org, Qi Zhang , stable@dpdk.org Date: Wed, 16 Dec 2020 08:21:26 +0800 Message-Id: <20201216002126.309348-1-qi.z.zhang@intel.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-stable] [PATCH v2] doc: fix some statements for ice vector PMD X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" 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 --- v2: fix statement for force-max-simd-bitwidth which is an EAL argument but not devarg. 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..2a4439a63a 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. -- 2.26.2