From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751145AbVHXQjv (ORCPT ); Wed, 24 Aug 2005 12:39:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751147AbVHXQjv (ORCPT ); Wed, 24 Aug 2005 12:39:51 -0400 Received: from web33301.mail.mud.yahoo.com ([68.142.206.116]:58006 "HELO web33301.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1751145AbVHXQjv (ORCPT ); Wed, 24 Aug 2005 12:39:51 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Reply-To:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=YhnrOh1EbcwMoRL3+y1QXmlKhWZL+fSeNWmiEgkIymbW8bBqEV1xcCd4DVbOgBzLkEoU6wvouAQx6RWbQXSCENtlR1SbUS0VlLYcKl/vTafPc9RrFI2d8tL69yrLWgd4jbtIeZv/noboZekCF9lpTbgE+R3RNHAx4/gp1QQesGg= ; Message-ID: <20050824163946.94088.qmail@web33301.mail.mud.yahoo.com> Date: Wed, 24 Aug 2005 09:39:46 -0700 (PDT) From: Danial Thom Reply-To: danial_thom@yahoo.com Subject: Re: 2.6.12 Performance problems To: Patrick McHardy Cc: Sven-Thorsten Dietrich , Helge Hafting , linux-kernel@vger.kernel.org In-Reply-To: <430B89BE.1020600@trash.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --- Patrick McHardy wrote: > Danial Thom wrote: > > None of this is helpful, but since no one has > > been able to tell me how to tune it to > provide > > absolute priority to the network stack I'll > > assume it can't be done. > > The network stack already has priority over > user processes, > except when executed in process context, so > preemption has > no direct impact on briding or routing > performance. > > The reason why noone answered your question is > because you > don't ask but claim or assume. > No, its because guys like you snip out content when they reply, and/or only read the parts of messages that you want to read, so when other people enter a thread, they miss the questions that were asked long ago. Quoting my post on Aug 22: "All of this aside, I need to measure the raw capabilities of the kernel. With 'bsd OSes I can tell what the breaking point is by driving the machine to livelock. Linux seems to have a soft, floating capacity in that it will drop packets here and there for no isolatable reason. I'm having difficulty making a case for its use in a networking appliance, as dropped packets are not acceptable. How do I tune the "its ok to drop packets when x occurs" algorithm to be "its never ok to drop packets unless x occurs" (such as a queue depth)? Is it possible?" Danial __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com