From owner-freebsd-questions Tue May 22 15: 3:44 2001 Delivered-To: freebsd-questions@freebsd.org Received: from fedde.littleton.co.us (cfedde.dsl.frii.net [216.17.139.141]) by hub.freebsd.org (Postfix) with ESMTP id 9B6BD37B422 for ; Tue, 22 May 2001 15:03:41 -0700 (PDT) (envelope-from cfedde@fedde.littleton.co.us) Received: from fedde.littleton.co.us (localhost [127.0.0.1]) by fedde.littleton.co.us (8.11.2/8.11.2) with ESMTP id f4MM3V875877; Tue, 22 May 2001 16:03:31 -0600 (MDT) Message-Id: <200105222203.f4MM3V875877@fedde.littleton.co.us> To: Marco Masotti Cc: questions@FreeBSD.ORG Subject: Re: microuptime() went backwards In-Reply-To: <3B095073.7DB8221@mclink.it> From: Chris Fedde Date: Tue, 22 May 2001 16:03:31 -0600 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 21 May 2001 19:29:23 +0200 Marco Masotti wrote: +------------------ | | Hello, | | from time to time my system hangs blankly, along with messases in the | console, as shown below in a very rapid succession: | | microuptime() went backwards (695.985643 -> 694.990191) | calcru: negative time of 517901893 usec for pid 332 | | | FrebBSD is 4.2, wit a SMP configured kernel, Abit BP6 2xCeleron@550 | | It happens not very frequently but I would like like what strange sort | of problem is all about. | | Thanks, Marco +------------------ Did you look at the manual page? DIAGNOSTICS Buggy hardware can cause "calcru negative..." when kern.time- counter.method is set to 0. I'm guessing that overclocking is pushing the edges of some timers on the motherboard thus exercizing the "buggy hardware" clause. Set kern.timecounter.method as described in the manual and see if it stabalizes. -- Chris Fedde To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message