From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754721AbbEUJlu (ORCPT ); Thu, 21 May 2015 05:41:50 -0400 Received: from www.linutronix.de ([62.245.132.108]:37670 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751385AbbEUJlq (ORCPT ); Thu, 21 May 2015 05:41:46 -0400 Date: Thu, 21 May 2015 11:41:50 +0200 (CEST) From: Thomas Gleixner To: Andy Lutomirski cc: Huang Rui , Borislav Petkov , Len Brown , "Rafael J. Wysocki" , x86@kernel.org, linux-kernel@vger.kernel.org, Fengguang Wu , Aaron Lu , Tony Li , Peter Zijlstra , John Stultz Subject: Re: [RFC PATCH 2/4] x86, mwaitt: introduce mwaitx idle with a configurable timer In-Reply-To: <555D3629.8080002@kernel.org> Message-ID: References: <1432022472-2224-1-git-send-email-ray.huang@amd.com> <1432022472-2224-3-git-send-email-ray.huang@amd.com> <555D3629.8080002@kernel.org> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 20 May 2015, Andy Lutomirski wrote: > John, Peter, Thomas: would it actually make sense to teach the core > timer/clockevent code about perfect time sources like invariant TSC + TSC Perfect? There is no such concept in timer land. > deadline? AFAICT right now we're not doing anything particularly interesting > with the TSC deadline timer. Interesting in what way? We still have to convert from and to nanoseconds and deal with the clock skew .... Thanks, tglx