From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by dpdk.org (Postfix) with ESMTP id 266631B1B8 for ; Thu, 5 Oct 2017 23:34:48 +0200 (CEST) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga105.fm.intel.com with ESMTP; 05 Oct 2017 14:34:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,482,1500966000"; d="scan'208";a="907182263" Received: from unknown (HELO [10.241.225.33]) ([10.241.225.33]) by FMSMGA003.fm.intel.com with ESMTP; 05 Oct 2017 14:34:47 -0700 To: Pascal Mazon , Matan Azrad Cc: dev@dpdk.org References: <1507042556-9839-1-git-send-email-matan@mellanox.com> <1507042556-9839-2-git-send-email-matan@mellanox.com> <93510ae3-736c-8a2c-f04b-534f3b545eed@6wind.com> From: Ferruh Yigit Message-ID: <957c1985-05a7-da8e-a2c7-34eba323cff5@intel.com> Date: Thu, 5 Oct 2017 22:34:47 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <93510ae3-736c-8a2c-f04b-534f3b545eed@6wind.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [dpdk-dev] [PATCH 2/2] net/tap: allow RSS flow action X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Oct 2017 21:34:49 -0000 <...> >> On 03/10/2017 16:55, Matan Azrad wrote: >>> One of the main identified use cases for the tap PMD is to be used in >>> combination with the fail-safe PMD as a fallback for a physical device. >>> >>> Fail-safe is very strict about making sure its current configuration is >>> properly applied to all slave devices, they get rejected otherwise in >>> order to maintain a consistent state. >>> >>> The problem is that tap's RSS support is currently limited to the >>> default (non-Toeplitz) balancing performed by the kernel on all Rx >>> queues. While proper RSS support emulation in the tap PMD is a work in >>> progress, the lack of rte_flow counterpart prevents validation of the >>> above use case in the meantime. >>> >>> Given that unlike most PMDs, tap is more about convenience than >>> performance, support for the RSS action can be temporarily faked with >>> a minimum amount of code and mostly correct behavior by treating it >>> like a QUEUE action. Traffic is directed to the first queue of the set. >>> >>> Signed-off-by: Matan Azrad > Acked-by: Pascal Mazon Applied to dpdk-next-net/master, thanks.