From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762695AbXGPO2Y (ORCPT ); Mon, 16 Jul 2007 10:28:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757675AbXGPO2R (ORCPT ); Mon, 16 Jul 2007 10:28:17 -0400 Received: from mail-in-05.arcor-online.net ([151.189.21.45]:50028 "EHLO mail-in-05.arcor-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757064AbXGPO2R convert rfc822-to-8bit (ORCPT ); Mon, 16 Jul 2007 10:28:17 -0400 Message-ID: <9335978.1184596094749.JavaMail.ngmail@webmail12> Date: Mon, 16 Jul 2007 16:28:14 +0200 (CEST) From: "M. Koehrer" To: linux-kernel@vger.kernel.org Subject: CONFIG_PREEMPT_RT Patch and UDP/IP on Ethernet in real time. MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT X-ngMessageSubType: MessageSubType_MAIL X-WebmailclientIP: 213.68.15.100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi everybody, I have a question concerning Ingo Molnar's realtime preempt patch. This patch is great go get low latency on timer threads and a really good real time behaviour. I want to connect an external, embedded device via Ethernet (UDP/IP) to my Linux PC. This communication should be in real time as well. For this I have a separate network adapter in my PC that is used solely for this UDP Ethernet traffic. However, I think all Ethernet traffic is be handled by the soft IRQ threads [softirq-net-rx] [softirq-net-tx] but I do not see a way to do real time networking via my dedicated network adapter. How can I get this UDP networking real time capable? I use kernel 2.6.21.6 and the related realtime preempt patch. However, this is a general question that is not related to a certain kernel version. Any feedback is welcome. Thanks a lot! Regards Mathias -- Mathias Koehrer mathias_koehrer@arcor.de Viel oder wenig? Schnell oder langsam? Unbegrenzt surfen + telefonieren ohne Zeit- und Volumenbegrenzung? DAS TOP ANGEBOT JETZT bei Arcor: günstig und schnell mit DSL - das All-Inclusive-Paket für clevere Doppel-Sparer, nur 39,85 € inkl. DSL- und ISDN-Grundgebühr! http://www.arcor.de/rd/emf-dsl-2