From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759340AbYDYIwL (ORCPT ); Fri, 25 Apr 2008 04:52:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757063AbYDYIvz (ORCPT ); Fri, 25 Apr 2008 04:51:55 -0400 Received: from fg-out-1718.google.com ([72.14.220.152]:57902 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754830AbYDYIvy (ORCPT ); Fri, 25 Apr 2008 04:51:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=ROUy2n3eJvE1Jv9waCelZS5DMWuW8Q278kcCitsQmtWP4JLAGgNzMRl3c28AJTbHe57Rie1jSU1wDbPDHbIPs0guwoDBge6GmOXNvkhSNzncSNDhMTBS6zgY2aCDLWOrWSfu+VoN8w2VsMuMvOU8MVz/vSFYa56UU8eB/mzKVdM= Message-ID: <18b669d80804250151h516788cdqc7931a7ab5a195de@mail.gmail.com> Date: Fri, 25 Apr 2008 17:51:49 +0900 From: "Shigeo N" To: "=?UTF-8?Q?Ilpo_J=C3=A4rvinen?=" Subject: Re: XTP for 2.6.25 Cc: "Andi Kleen" , LKML , Netdev In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline References: <18b669d80804240314t7b2f6e4cpc9a9f2690c6d21b4@mail.gmail.com> <873apbijb9.fsf@basil.nowhere.org> <18b669d80804240606n47854939x94278f8d974034c1@mail.gmail.com> <18b669d80804250059m793f3f56xc4fdb8bad949fa3@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by alpha.home.local id m3P8qHEB030873 One host(sender) is 2.6.25, but the other(receiver) is 2.6.18.I will evaluate again after I upgrade it to 2.6.25. Thanks On Fri, Apr 25, 2008 at 5:23 PM, Ilpo Järvinen wrote:> On Fri, 25 Apr 2008, Shigeo N wrote:>> > case2) random delay> >> > In this case, add a fixed amount of delay + 10% random delay by> > command, "tc change dev eth0 root netem delay 100ms 10ms 25%".> >> > Here is the result.> >> > fixed delay UDP/TCP/XTP throghput> > ---------------------------------------> > 10ms 88/80/92 Mbps> > 30ms 88/51/91 Mbps> > 50ms 88/41/89 Mbps> > 70ms 88/28/80 Mbps> > 100ms 88/19/66 Mbps> >> > TCP's perfomance looks very poor when delay is long and variable.>> Where these results with 2.6.25 as well? ...John Heffner just couple of> days ago fixed reordering related problem in TCP (in case that netem> parametrization causes reordering), the fix is not even in 2.6.24.y, I> think...>> --> i.>{.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I