Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754985Ab2BVS5d (ORCPT ); Wed, 22 Feb 2012 13:57:33 -0500 Received: from mail-qw0-f53.google.com ([209.85.216.53]:50577 "EHLO mail-qw0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752219Ab2BVS5a (ORCPT ); Wed, 22 Feb 2012 13:57:30 -0500 Authentication-Results: mr.google.com; spf=pass (google.com: domain of cyfmxc@gmail.com designates 10.229.135.10 as permitted sender) smtp.mail=cyfmxc@gmail.com; dkim=pass header.i=cyfmxc@gmail.com MIME-Version: 1.0 X-Google-Sender-Delegation: tabloid.adroit@gmail.com In-Reply-To: <4F4484AC.9050500@lge.com> References: <4F4484AC.9050500@lge.com> Date: Wed, 22 Feb 2012 13:57:29 -0500 X-Google-Sender-Auth: vCGUhTu3tiCRREUnbWD8fHMbWrM Message-ID: Subject: Re: perf record: can I specify multiple events and use different sample-after value From: Yuanfang Chen To: Namhyung Kim Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1536 Lines: 51 On Wed, Feb 22, 2012 at 1:01 AM, Namhyung Kim wrote: > 2012-02-22 10:59 AM, Yuanfang Chen wrote: >> >> Hi all, >> > > Hi, > > > >> I'm trying use perf tool from the linux kernel package to measure >> several raw PMU events. In the manpage of perf-record there is an "-l" >> option (Scale counter values), which is useful for my case because I >> want to know the total counter value, not just sample count. However >> it seems the -l is not recognized, is this expected? How can I get a >> total count? >> > > "perf report --show-total-period" will be your friend. > > BTW, it seems you were using old version of perf (and kernel too, maybe). > I have no idea if your perf wouldn't support the option. :) You are right. my perf version is 3.0.0, just updated to 3.3.0-rc4. --show-total-period works now. > > The "-l" option was meaningful only if you specified events more than the > actual number of counters in the PMU. So -l is for multiplexing? > > > >> Another question is that how can I specify multiple events and use >> different sample-after value for each of them? like perf record -c >> 10000,2000000,2000000 -e r2d4,r03c,r0c0 >> > > It's not possible now. You should run a number of instances of perf for > that purpose AFAIK. > > > Thanks, > Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/