From owner-freebsd-current Wed Nov 6 5:39:15 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9B07937B406; Wed, 6 Nov 2002 05:39:14 -0800 (PST) Received: from salmon.maths.tcd.ie (salmon.maths.tcd.ie [134.226.81.11]) by mx1.FreeBSD.org (Postfix) with SMTP id 285C543E97; Wed, 6 Nov 2002 05:39:13 -0800 (PST) (envelope-from dwmalone@maths.tcd.ie) Received: from walton.maths.tcd.ie by salmon.maths.tcd.ie with SMTP id ; 6 Nov 2002 13:39:11 +0000 (GMT) Date: Wed, 6 Nov 2002 13:39:11 +0000 From: David Malone To: Sameh Ghane Cc: freebsd-current@freebsd.org, phk@freebsd.org Subject: Re: time counter / time ticking or hardware issues Message-ID: <20021106133911.GA42972@walton.maths.tcd.ie> References: <20021106122631.GA93442@anthologeek.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20021106122631.GA93442@anthologeek.net> User-Agent: Mutt/1.3.25i Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, Nov 06, 2002 at 01:26:31PM +0100, Sameh Ghane wrote: > Timecounter "i8254" frequency 1193182 Hz > Timecounter "TSC" frequency 332755591 Hz > CPU: AMD-K6(tm) 3D processor (332.76-MHz 586-class CPU) > Origin = "AuthenticAMD" Id = 0x58c Stepping = 12 > Features=0x8021bf > AMD Features=0xffffffff80000800 There seem to be a family of K6 motherboards on which the ACPI timecounter runs fast by a factor of about two. I've been seeing this since ACPI became the default on one motherboard. I get around it by using the TSC instead: sysctl kern.timecounter.hardware=TSC David. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message