From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f45.google.com (mail-pb0-f45.google.com [209.85.160.45]) by dpdk.org (Postfix) with ESMTP id 28FF86A89 for ; Fri, 28 Feb 2014 02:03:23 +0100 (CET) Received: by mail-pb0-f45.google.com with SMTP id un15so24698pbc.32 for ; Thu, 27 Feb 2014 17:04:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=A+nAiNkUx0DR1YbC3tAcrroE2SyVUOfm8BhYlZDiiA8=; b=OTbALhuVdJGPiWJ1npcOi4rEnscJW8CuyVszjMTMA3l8A4oQED0NKVuM0eyJjXSVhP brUk9as3ImLrkzUJ+5depjPPvbCHZ02I1UTmLMdrcoY5fJ7qPNzAHso28vmZ3ZLAjMbj GOqWtclhAyIuPezMd94jCfdI30tncEf/XEEMHrYfSu6mW5V9CFABcyvXTYWs5fPCOHoO IZwFK2pZYvgR11WXfKJIyFdbSzIpvslmlDF540tMdiJQjtsI8DJqC7KUBI1lO2Ywv95p Tiq1uCeuFM3iWKCUH45KZkskk/qg2tFTLCC50KwdeNim8D/sx/N/wnVeQy7rTvWe2CQP J/qg== X-Gm-Message-State: ALoCoQlwN+wU0zOmqoQj40NSYDB5vUL70uAN/0x1HtOZC48Wio+Mevt6ocLNi8yDSTkTiIq5gcR3 X-Received: by 10.66.149.37 with SMTP id tx5mr18173472pab.81.1393549490384; Thu, 27 Feb 2014 17:04:50 -0800 (PST) Received: from [192.168.128.242] ([50.242.95.29]) by mx.google.com with ESMTPSA id fk4sm309421pab.23.2014.02.27.17.04.48 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 27 Feb 2014 17:04:49 -0800 (PST) Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\)) From: Daniel Kan In-Reply-To: Date: Thu, 27 Feb 2014 17:04:46 -0800 Content-Transfer-Encoding: quoted-printable Message-Id: <75A2A7C4-F592-407C-92BA-7BBD6B6B2A72@nyansa.com> References: To: Sangjin Han X-Mailer: Apple Mail (2.1827) Cc: dev@dpdk.org Subject: Re: [dpdk-dev] Is it possible to get symmetric hash from RSS for a given flow X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Feb 2014 01:03:24 -0000 Thanks, Sangjin. This is exactly i=92m looking for. Sorry, I should=92ve = googled it first. It=92s good to know that hash key of repetitive 0x6d5a = still yields good load balancing results. Dan On Feb 27, 2014, at 4:24 PM, Sangjin Han = wrote: > Hi, >=20 > This is exactly what you want: > http://www.ndsl.kaist.edu/~shinae/papers/TR-symRSS.pdf >=20 > Sangjin >=20 > On Thu, Feb 27, 2014 at 4:22 PM, Daniel Kan wrote: >> Hi, >> It appears that the hash computed from RSS is unidirectional. Hence, = for a 5-tuple flow, packet in one direction can be routed to a queue = that may be different than packet in the other direction. I'm wondering = if there is a configuration or mechanism to get a symmetric hash so that = all packets for a given flow will be in the same queue. Thanks in = advance. >>=20 >> Dan