From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C42EC43142 for ; Thu, 2 Aug 2018 12:39:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1E1A62150A for ; Thu, 2 Aug 2018 12:39:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="SvvGu54R" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1E1A62150A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732374AbeHBOad (ORCPT ); Thu, 2 Aug 2018 10:30:33 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:34446 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732130AbeHBOac (ORCPT ); Thu, 2 Aug 2018 10:30:32 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=X+gueWMU+QorZpcfp+foDLCYffln1iijYVQt60xvrTM=; b=SvvGu54RxuNOdOeV5qv5EIlH6 gusSbGGLzLtZMQ+Jke+gHA5+PcQBSOS7ivH++isw3MCCv0dfjFnlUQSnFhmDs/oSAZOyBezLUH3qV 8bKc2SXuJcGsksBO9lE/Cf8PfRb5NTgBKKZhD8CGY8IrYeDpSM15xoMu0tDXWAqHgK4pSmczVf5Bp 6nKNrqq7goyDO5c1WzLsWrqPCTY5dxMlwxdt0g4cd4o83wUQKW6Z1/Sk68R76wP9o/SVMRymsxdoA n8mg6NjqelAYA1Rm16qwpx4LzwSaS1gu+uvvJs8XBOfZ5hXkQA/KngAFsC9gXEp6/WP48MibnBdWL 7NDYrqwhw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1flCt3-00076E-JU; Thu, 02 Aug 2018 12:39:25 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 14A0020268263; Thu, 2 Aug 2018 14:39:24 +0200 (CEST) Date: Thu, 2 Aug 2018 14:39:23 +0200 From: Peter Zijlstra To: Reinette Chatre Cc: tglx@linutronix.de, mingo@redhat.com, fenghua.yu@intel.com, tony.luck@intel.com, vikas.shivappa@linux.intel.com, gavin.hindman@intel.com, jithu.joseph@intel.com, dave.hansen@intel.com, hpa@zytor.com, x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/2] x86/intel_rdt and perf/x86: Fix lack of coordination with perf Message-ID: <20180802123923.GJ2530@hirez.programming.kicks-ass.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 31, 2018 at 12:38:27PM -0700, Reinette Chatre wrote: > Dear Maintainers, > > The success of Cache Pseudo-Locking can be measured via the use of > performance events. Specifically, the number of cache hits and misses > reading a memory region after it has been pseudo-locked to cache. This > measurement is triggered via the resctrl debugfs interface. > > To ensure most accurate results the performance counters and their > configuration registers are accessed directly. NAK on that.