From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755965Ab3LSTXL (ORCPT ); Thu, 19 Dec 2013 14:23:11 -0500 Received: from terminus.zytor.com ([198.137.202.10]:35143 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754522Ab3LSTXI (ORCPT ); Thu, 19 Dec 2013 14:23:08 -0500 Message-ID: <52B34759.3010009@zytor.com> Date: Thu, 19 Dec 2013 11:22:01 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Ingo Molnar CC: Peter Zijlstra , Len Brown , x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Len Brown , stable@vger.kernel.org, Linus Torvalds , Thomas Gleixner , Mike Galbraith , Borislav Petkov Subject: Re: [PATCH] x86 idle: repair large-server 50-watt idle-power regression References: <20131219122257.GC11279@gmail.com> <52B316FF.50906@zytor.com> <20131219160210.GA28426@gmail.com> <52B31B21.6010901@zytor.com> <20131219162136.GM16438@laptop.programming.kicks-ass.net> <52B323BE.7090108@zytor.com> <20131219170741.GB30382@gmail.com> <52B33640.3020204@zytor.com> <20131219181948.GD32508@gmail.com> In-Reply-To: <20131219181948.GD32508@gmail.com> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/19/2013 10:19 AM, Ingo Molnar wrote: > > ( It would also be nice to know whether MONITOR loads that cacheline > into the CPUs cache, and in what state it loads it. ) > I would assume that is implementation-dependent. However, one plausible implementation is to load the cache line into the cache in shared state and monitor for evictions. -hpa