From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763410AbYDOBLb (ORCPT ); Mon, 14 Apr 2008 21:11:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755199AbYDOBLX (ORCPT ); Mon, 14 Apr 2008 21:11:23 -0400 Received: from khc.piap.pl ([195.187.100.11]:38744 "EHLO khc.piap.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755175AbYDOBLW (ORCPT ); Mon, 14 Apr 2008 21:11:22 -0400 To: lsorense@csclub.uwaterloo.ca (Lennart Sorensen) Cc: "H. Peter Anvin" , Marc Perkel , Chris Snook , linux-kernel@vger.kernel.org Subject: Re: AMD Quad Core clock problem? References: <47FFD3F3.50107@redhat.com> <821384.64293.qm@web52504.mail.re2.yahoo.com> <20080411213843.GH2160@csclub.uwaterloo.ca> <4802608A.3040901@zytor.com> <20080414151222.GF7385@csclub.uwaterloo.ca> From: Krzysztof Halasa Date: Tue, 15 Apr 2008 03:11:20 +0200 In-Reply-To: <20080414151222.GF7385@csclub.uwaterloo.ca> (Lennart Sorensen's message of "Mon\, 14 Apr 2008 11\:12\:22 -0400") Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org lsorense@csclub.uwaterloo.ca (Lennart Sorensen) writes: > True, but usually they give you an option to turn it off in the BIOS to > make the system actually work with things like NTP. > > Maybe I should have said "Any system with spread spectrum enabled". I haven't investigated those spread spectrums at all but sometimes there are options: "center" (the frequency is centered around the nominal value, I guess) and "below" (or something like that). If done correctly, "center" shouldn't have visible effect on NTP, should it? The other important question is "what frequency has spread spectrum enabled"? CPU (= TSC), HPET, RAM, something else? -- Krzysztof Halasa