Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754748AbXLFXDI (ORCPT ); Thu, 6 Dec 2007 18:03:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752925AbXLFXC4 (ORCPT ); Thu, 6 Dec 2007 18:02:56 -0500 Received: from zrtps0kp.nortel.com ([47.140.192.56]:43531 "EHLO zrtps0kp.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752358AbXLFXCz (ORCPT ); Thu, 6 Dec 2007 18:02:55 -0500 Message-ID: <47587F90.8010400@nortel.com> Date: Thu, 06 Dec 2007 17:02:40 -0600 From: "Chris Friesen" User-Agent: Mozilla Thunderbird 1.0.2-6 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andi Kleen CC: Renzo Davoli , linux-kernel@vger.kernel.org Subject: Re: New Address Family: Inter Process Networking (IPN) References: <20071205164055.GA2082@cs.unibo.it> <20071206053016.GA1464@cs.unibo.it> <20071206163538.GC20595@one.firstfloor.org> <47585D66.3000404@nortel.com> <20071206212644.GA26725@one.firstfloor.org> <47586E7F.1020903@nortel.com> <20071206220754.GF20595@one.firstfloor.org> In-Reply-To: <20071206220754.GF20595@one.firstfloor.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 06 Dec 2007 23:02:44.0468 (UTC) FILETIME=[1C666B40:01C8385C] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 621 Lines: 19 Andi Kleen wrote: >>On a 1.4GHz P4 I measured a 44% increase in latency between a unix >>datagram and a UDP datagram. > That's weird. I just reran on a 3.2GHZ P4 running 2.6.11 (Fedora Core 4). 42% latency increase. For stream sockets, unix gives approximately a 62% bandwidth increase over tcp. (Although tcp could probably be tuned to do better than this.) Chris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/