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 6DCDAA09E5 for ; Tue, 8 Dec 2020 02:54:00 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 245B2C908; Tue, 8 Dec 2020 02:53:59 +0100 (CET) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by dpdk.org (Postfix) with ESMTP id 4A9F098; Tue, 8 Dec 2020 02:53:55 +0100 (CET) IronPort-SDR: emA1Z3EWdHePsdiPtTAIdWmvvOtp5rMsDtCP3aLKN2YLI9FsZb/7atP9qxdf4/TaRQOzUtYMqK 3yiSzLl7xiNA== X-IronPort-AV: E=McAfee;i="6000,8403,9828"; a="235414205" X-IronPort-AV: E=Sophos;i="5.78,401,1599548400"; d="scan'208";a="235414205" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Dec 2020 17:53:52 -0800 IronPort-SDR: kjD0Xg9Hf4nEIMn7PM2Gb6IWp3xYwpYt64+zDiD8g1en9x8qfdshqd2ONRUx1cbviiGYlj16P2 nUcIAuy6+d8A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,401,1599548400"; d="scan'208";a="363425971" Received: from dpdk51.sh.intel.com ([10.67.111.142]) by orsmga008.jf.intel.com with ESMTP; 07 Dec 2020 17:53:51 -0800 From: Qi Zhang To: ferruh.yigit@intel.com, qiming.yang@intel.com Cc: dev@dpdk.org, leyi.rong@intel.com, wenzhuo.lu@intel.com, Qi Zhang , stable@dpdk.org Date: Tue, 8 Dec 2020 09:57:48 +0800 Message-Id: <20201208015748.969395-1-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] 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 --- 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..5ab6795578 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 devargs "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