From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753279AbdKWRqW (ORCPT ); Thu, 23 Nov 2017 12:46:22 -0500 Received: from mail.kernel.org ([198.145.29.99]:47436 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752968AbdKWRqV (ORCPT ); Thu, 23 Nov 2017 12:46:21 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D26D421921 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=acme@kernel.org Date: Thu, 23 Nov 2017 14:46:17 -0300 From: Arnaldo Carvalho de Melo To: Jiri Olsa Cc: Andi Kleen , jolsa@kernel.org, linux-kernel@vger.kernel.org Subject: Re: Add fine grained sampled metrics for perf script Message-ID: <20171123174617.GK8789@kernel.org> References: <20171117214300.32746-1-andi@firstfloor.org> <20171123074742.GA5587@krava> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171123074742.GA5587@krava> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Thu, Nov 23, 2017 at 08:47:42AM +0100, Jiri Olsa escreveu: > On Fri, Nov 17, 2017 at 01:42:57PM -0800, Andi Kleen wrote: > > SNIP > > > TopDown: > > > > Note TopDown requires disabling SMT if you have it enabled (e.g. by offlining > > the extra CPUs), because SMT would require sampling per core, which is not supported. > > > > $ perf record -e '{ref-cycles,topdown-fetch-bubbles,topdown-recovery-bubbles,\ > > topdown-slots-retired,topdown-total-slots,topdown-slots-issued}:S' -a sleep 1 > > $ perf script --header -I -F cpu,ip,sym,event,metric,period > > ... > > [000] 121108 ref-cycles: ffffffff8165222e copy_user_enhanced_fast_string > > [000] 190350 topdown-fetch-bubbles: ffffffff8165222e copy_user_enhanced_fast_string > > [000] 2055 topdown-recovery-bubbles: ffffffff8165222e copy_user_enhanced_fast_string > > [000] 148729 topdown-slots-retired: ffffffff8165222e copy_user_enhanced_fast_string > > [000] 144324 topdown-total-slots: ffffffff8165222e copy_user_enhanced_fast_string > > [000] 160852 topdown-slots-issued: ffffffff8165222e copy_user_enhanced_fast_string > > [000] metric: 33.0% frontend bound > > [000] metric: 3.5% bad speculation > > [000] metric: 25.8% retiring > > [000] metric: 37.7% backend bound > > [000] 112112 ref-cycles: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] 357222 topdown-fetch-bubbles: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] 3325 topdown-recovery-bubbles: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] 323553 topdown-slots-retired: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] 270507 topdown-total-slots: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] 341226 topdown-slots-issued: ffffffff8165aec8 _raw_spin_lock_irqsave > > [000] metric: 33.0% frontend bound > > [000] metric: 2.9% bad speculation > > [000] metric: 29.9% retiring > > [000] metric: 34.2% backend bound > > > > > > Git tree: > > git://git.kernel.org/pub/scm/limux/kernel/git/ak/linux-misc.git perf/script-metric-3 > > > > > > v1: Initial post > > v2: > > Remove already merged patches. > > Use evsel->priv for new fields > > Port to new base line, support fp output. > > Handle stats in ->stats, not ->priv > > Minor cleanups > > v3: > > Enable EVENT_UPDATE in perf record, and record unit/scale/cpu map/thread map > > Drop the previous zero cpu map hack. > > Acked-by: Jiri Olsa Thanks, applied, and added the detailed explanation about the use of the term 'averaging' done by Andi, - Arnaldo