From owner-freebsd-questions@FreeBSD.ORG Tue Aug 23 21:36:23 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org 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 7040F16A420 for ; Tue, 23 Aug 2005 21:36:23 +0000 (GMT) (envelope-from uwe@laverenz.de) Received: from natsmtp00.rzone.de (natsmtp00.rzone.de [81.169.145.165]) by mx1.FreeBSD.org (Postfix) with ESMTP id 82EF443D48 for ; Tue, 23 Aug 2005 21:36:22 +0000 (GMT) (envelope-from uwe@laverenz.de) Received: from athena.laverenz.de (p5480C2CF.dip.t-dialin.net [84.128.194.207]) by post.webmailer.de (8.13.1/8.13.1) with ESMTP id j7NLaJkY014967 for ; Tue, 23 Aug 2005 23:36:20 +0200 (MEST) Received: from localhost (localhost.localdomain [127.0.0.1]) by athena.laverenz.de (Postfix) with ESMTP id 966BAE39CD6E for ; Tue, 23 Aug 2005 23:36:19 +0200 (CEST) Received: from athena.laverenz.de ([127.0.0.1]) by localhost (athena [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 03427-05 for ; Tue, 23 Aug 2005 23:36:18 +0200 (CEST) Received: by athena.laverenz.de (Postfix, from userid 2000) id 9A171E000344; Tue, 23 Aug 2005 23:36:18 +0200 (CEST) Date: Tue, 23 Aug 2005 23:36:18 +0200 From: Uwe Laverenz To: freebsd-questions@freebsd.org Message-ID: <20050823213618.GB3407@laverenz.de> Mail-Followup-To: freebsd-questions@freebsd.org References: <1124825539.51697.10.camel@Endeavour.lordofunix.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1124825539.51697.10.camel@Endeavour.lordofunix.org> Organization: private site Sender: uwe@laverenz.de User-Agent: Mutt/1.5.9i X-Virus-Scanned: by amavisd-new-20030616-p10 (Debian) at laverenz.de Subject: Re: Problem with irq and printing system X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Aug 2005 21:36:23 -0000 On Tue, Aug 23, 2005 at 09:32:19PM +0200, Jose Luis Alarcon Sanchez wrote: > Interrupt storm detected on "irq7: lpt0"; throttling interrupt source > > What is the meaning of this message?. Have this problem a solution?. This is a very annoying "feature" in FreeBSD: printing causes a high rate of interrupts and the kernel tries to reduce this. AFAIK there are two possible ways to solve this: 1. To increase the threshold for this interrupt storm detection just add the following line to your /etc/sysctl.conf: hw.intr_storm_threshold=4096 2. Let the parallel port run via polling instead of interrupts (this causes high loads), add the following line to your /boot/devices.hints: hint.ppc.0.flags="0x28" HTH, Uwe