Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161212AbXAHXNJ (ORCPT ); Mon, 8 Jan 2007 18:13:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161266AbXAHXNJ (ORCPT ); Mon, 8 Jan 2007 18:13:09 -0500 Received: from twinlark.arctic.org ([207.29.250.54]:53563 "EHLO twinlark.arctic.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161212AbXAHXNI (ORCPT ); Mon, 8 Jan 2007 18:13:08 -0500 Date: Mon, 8 Jan 2007 15:13:07 -0800 (PST) From: dean gaudet To: "H. Peter Anvin" cc: Jan Engelhardt , akpm@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] All Transmeta CPUs have constant TSCs In-Reply-To: <45A2AEE0.4090707@zytor.com> Message-ID: References: <200701050148.l051mHGM005275@terminus.zytor.com> <45A2AEE0.4090707@zytor.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 769 Lines: 19 On Mon, 8 Jan 2007, H. Peter Anvin wrote: > I *definitely* support the concept that RDPMC 0 should could CPU cycles by > convention in Linux. unfortunately that'd be very limiting and annoying on core2 processors which have dedicated perf counters for clocks unhalted (actual vs. nominal), but only 2 configurable perf counters. i forget what ecx value gets you the dedicated counters... but a solution which might work would be a syscall to return the perf counter number... or we could just merge perfmon ;) -dean - 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/