Received: by 10.213.65.16 with SMTP id m16csp230240imf; Mon, 12 Mar 2018 01:29:04 -0700 (PDT) X-Google-Smtp-Source: AG47ELva5pBb4XYckRiuR+ViSLUBgTKZCjSkYfmEyOSgFyFL1cWpn3c+2FUHiVnGXSs6SmDpuoAB X-Received: by 2002:a17:902:9307:: with SMTP id bc7-v6mr7336440plb.29.1520843344919; Mon, 12 Mar 2018 01:29:04 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1520843344; cv=none; d=google.com; s=arc-20160816; b=CdIMdiZBqRjn/kUfykFEL+CUBsVQirce9XkCtjtKlS0ixHdPxRYP8jYOIS+eT9Gbb+ hhXccY0tOE85NfBvpySidjMc8kOTbcq5xPbsS5QgS0F25b+eAFx602+VbcYWTSjMTJ0K GxAFZ59HO8WPVhVtb6PYpA+ioyZQYkReg/kp11vca8jJ5uoXbhVBFx/hM1lT5VpzE55h HGyOvIASZlO/JXSZ71qgnlhzNFie5V6SqOVWAlC5jxCWEJywNsHTQna5MOCouAVZh16p L/+x/trh17uclvNQMCZNao16b03ZJ8Gp0dQlOwseS+nA2CeGUUHVoQPF5SppEsA14Vas BPXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature:arc-authentication-results; bh=l5fICjiqiLWuyOCF2s6rLUfhUdeM+Q33MqcfWZX2mdg=; b=FO1o47x/flakBDZQRcgqhzd4Muc924voh2ikTm1EX7/Oqd5AU+KBhUQ7JjQw1idMfY wmhOhAjCUk/aNduvG6aM57IGw8AmgmG9nr9SXVI8W1PtFqntGl/4LkMgI6uoFpKhnkGF dfqkomK05I80clYh7ZCEhcwRmm2eOoiA7h+RNRSDZ4cjrSDZji3wrUQmUubo/CKmcdOi P9t+AOspjESyu4n1xbI6wdk7OzP44OAiWberURnTWXLCFM6XoxBtnu+fLG74RNYZQtqF zHTylsLXF/qYZkeaTiFC9p7cRcxaBAYaACWW5n+3wmyYFel1MRCAAf0CxjUDWSBf5APS OY3w== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=K79CIzqM; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id g9-v6si5855618pli.676.2018.03.12.01.28.50; Mon, 12 Mar 2018 01:29:04 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=K79CIzqM; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752476AbeCLI1s (ORCPT + 99 others); Mon, 12 Mar 2018 04:27:48 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:59230 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751254AbeCLI1r (ORCPT ); Mon, 12 Mar 2018 04:27:47 -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=l5fICjiqiLWuyOCF2s6rLUfhUdeM+Q33MqcfWZX2mdg=; b=K79CIzqMx0i5Ne/wI9Afzbrbe DE2LD20MLnyOSigWCed/E7Ja4otn/3NjWe/qn19P/yh8v0TOUy/XweTIo1uMSO+NLmpzDg9sKteYX 4HXUzF+JIsjtViuzFGHFpHsn38xz7VlI8wd6rDuybaw+XaG9kcwylpW+KwqYu7LjZpmyxHc0HnZ+T H692GiYZyEeLWhrAmFq696PI54F6XNnrhDaQSelVw3dduoVUBUG6FeERuHLRQN2EU3w98uSYNw3yu bHsmh0w4pkBB52J2CsCjYPUz0IpM4KIwTzkaSoI3ufe0A4SsU09U0scZt7WD7IdCbRg3oGXsPCE6I M9hECkopg==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.89 #1 (Red Hat Linux)) id 1evIo2-0000y8-VO; Mon, 12 Mar 2018 08:27:43 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 590182029FA14; Mon, 12 Mar 2018 09:27:41 +0100 (CET) Date: Mon, 12 Mar 2018 09:27:41 +0100 From: Peter Zijlstra To: Jason Vas Dias Cc: x86@kernel.org, LKML , Thomas Gleixner , andi Subject: Re: [PATCH v4.16-rc4 2/2] x86/vdso: on Intel, VDSO should handle CLOCK_MONOTONIC_RAW Message-ID: <20180312082741.GD4064@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/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 12, 2018 at 07:01:20AM +0000, Jason Vas Dias wrote: > Sometimes, particularly when correlating elapsed time to performance > counter values, So what actual problem are you tring to solve here? Perf can already give you sample time in various clocks, including MONOTONIC_RAW.