From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753638AbcEPM6m (ORCPT ); Mon, 16 May 2016 08:58:42 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36235 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753276AbcEPM6l (ORCPT ); Mon, 16 May 2016 08:58:41 -0400 Date: Mon, 16 May 2016 14:58:38 +0200 From: Jiri Olsa To: Andi Kleen Cc: acme@kernel.org, peterz@infradead.org, jolsa@kernel.org, mingo@kernel.org, linux-kernel@vger.kernel.org Subject: Re: Add top down metrics to perf stat Message-ID: <20160516125838.GD10877@krava> References: <1463190297-17408-1-git-send-email-andi@firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1463190297-17408-1-git-send-email-andi@firstfloor.org> User-Agent: Mutt/1.6.1 (2016-04-27) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Mon, 16 May 2016 12:58:40 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 13, 2016 at 06:44:49PM -0700, Andi Kleen wrote: SNIP > > The formulas to compute the metrics are generic, they > only change based on the availability on the abstracted > input values. > > The kernel declares the events supported by the current > CPU and perf stat then computes the formulas based on the > available metrics. > > > Example output: > > $ perf stat --topdown -I 1000 cmd > 1.000735655 frontend bound retiring bad speculation backend bound > 1.000735655 S0-C0 2 47.84% 11.69% 8.37% 32.10% > 1.000735655 S0-C1 2 45.53% 11.39% 8.52% 34.56% you've lost first 3 header lines (time/core/cpus): [jolsa@ibm-x3650m4-01 perf]$ sudo ./perf stat --per-core -e cycles -I 1000 -a # time core cpus counts unit events 1.000310344 S0-C0 2 3,764,470,414 cycles 1.000310344 S0-C1 2 3,764,445,293 cycles 1.000310344 S0-C2 2 3,764,428,422 cycles also I'm still getting -0% as I mentioned in my previous comment: [jolsa@ibm-x3650m4-01 perf]$ sudo ./perf stat --topdown -I 1000 -a nmi_watchdog enabled with topdown. May give wrong results. Disable with echo 0 > /proc/sys/kernel/nmi_watchdog 1.001615409 retiring bad speculation frontend bound backend bound 1.001615409 S0-C0 2 38.3% 0.0% 58.4% 3.3% 1.001615409 S0-C1 2 38.1% -0.0% 59.3% 2.6% 1.001615409 S0-C2 2 38.1% 0.0% 58.9% 2.9% 1.001615409 S0-C3 2 38.1% -0.0% 58.9% 3.0% 1.001615409 S0-C4 2 38.0% 0.0% 59.0% 2.9% 1.001615409 S0-C5 2 38.1% -0.0% 58.6% 3.3% 1.001615409 S1-C0 2 49.7% 1.9% 44.7% 3.7% thanks, jirka