From owner-freebsd-questions@FreeBSD.ORG Mon Nov 15 19:57:19 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EC03E16A4D1 for ; Mon, 15 Nov 2004 19:57:19 +0000 (GMT) Received: from adsl-68-76-19-75.dsl.klmzmi.ameritech.net (adsl-68-76-19-75.dsl.klmzmi.ameritech.net [68.76.19.75]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C23643D4C for ; Mon, 15 Nov 2004 19:57:19 +0000 (GMT) (envelope-from luke@foolishgames.com) Received: from [192.168.0.49] (24.247.120.6.kzo.mi.chartermi.net [24.247.120.6]) (authenticated bits=0)ESMTP id iAFJvtRg085911; Mon, 15 Nov 2004 14:57:56 -0500 (EST) (envelope-from luke@foolishgames.com) X-Authentication-Warning: adsl-68-76-19-75.dsl.klmzmi.ameritech.net: Host 24.247.120.6.kzo.mi.chartermi.net [24.247.120.6] claimed to be [192.168.0.49] Message-Id: <88478FE6-3740-11D9-89CA-000A95EFF4CA@foolishgames.com> X-Habeas-Swe-6: email in exchange for a license for this Habeas X-Habeas-Swe-3: like Habeas SWE (tm) Date: Mon, 15 Nov 2004 14:57:08 -0500 X-Habeas-Swe-8: Message (HCM) and not spam. Please report use of this From: Lucas Holt X-Habeas-Swe-5: Sender Warranted Email (SWE) (tm). The sender of this X-Habeas-Swe-2: brightly anticipated In-Reply-To: <20041115105749.GA41266@pcs28.suedfactoring.de> References: <20041115105749.GA41266@pcs28.suedfactoring.de> To: axel.gruner@suedfactoring.de X-Habeas-Swe-7: warrant mark warrants that this is a Habeas Compliant Mime-Version: 1.0 (Apple Message framework v619) X-Habeas-Swe-4: Copyright 2002 Habeas (tm) Content-Type: text/plain; charset=US-ASCII; format=flowed X-Habeas-Swe-1: winter into spring Content-Transfer-Encoding: 7bit X-Habeas-Swe-9: mark in spam to . X-Mailer: Apple Mail (2.619) X-Virus-Scanned: ClamAV 0.80/585/Thu Nov 11 07:22:42 2004 clamav-milter version 0.80j07:22:42 2004 clamav-milter version 0.80j X-Virus-Status: Clean cc: freebsd-questions@freebsd.org Subject: Re: device polling on SMP box X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Nov 2004 19:57:20 -0000 There is an assumption that it would be faster to have 2 cpus process the interupts than to use polling which can run on one processor at a time. On my system, it appears to be faster to use polling. I have a dual xeon 2.0 ghz. On Nov 15, 2004, at 5:57 AM, Axel S. Gruner wrote: > Hi. > > I am just wondering why "options DEVICE_POLLING" is not possible with > a SMP-Kernel. > Well, i know that there is a workaround with > "/usr/src/sys/kern/kern_poll.c" which works perfectly building a SMP > Kernel with polling. > My question is, are there any known problems with SMP+polling or why is > it not possible by default? > > asg > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > > Lucas Holt Luke@FoolishGames.com ________________________________________________________ FoolishGames.com (Jewel Fan Site) JustJournal.com (Free blogging)