Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 17 Sep 2002 19:36:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 17 Sep 2002 19:36:56 -0400 Received: from pizda.ninka.net ([216.101.162.242]:45188 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Tue, 17 Sep 2002 19:36:56 -0400 Date: Tue, 17 Sep 2002 16:32:46 -0700 (PDT) Message-Id: <20020917.163246.113965700.davem@redhat.com> To: johnstul@us.ibm.com Cc: jamesclv@us.ibm.com, ak@suse.de, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org, anton.wilson@camotion.com Subject: Re: do_gettimeofday vs. rdtsc in the scheduler From: "David S. Miller" In-Reply-To: <1032305535.7481.204.camel@cog> References: <200209171555.52872.jamesclv@us.ibm.com> <20020917.161215.03597459.davem@redhat.com> <1032305535.7481.204.camel@cog> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 18 From: john stultz Date: 17 Sep 2002 16:32:15 -0700 Additionally, where is this system tick thing? You make it sound like its a register in the cpu, and while the Ultra-III may have one, I'm unaware of a system/bus tick register on intel chips. Is it in some semi-documented MSR? It's in a register on Ultra-III. The whole point of this conversation, if you read my initial postings, is that "this should have been specified in the x86 architecture" I know full well it isn't currently :-) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/