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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,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 27B5AC3279B for ; Wed, 4 Jul 2018 15:25:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D2F1E21532 for ; Wed, 4 Jul 2018 15:25:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D2F1E21532 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 S1752960AbeGDPZk (ORCPT ); Wed, 4 Jul 2018 11:25:40 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:46578 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752634AbeGDPZj (ORCPT ); Wed, 4 Jul 2018 11:25:39 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B1ABB87A84; Wed, 4 Jul 2018 15:25:38 +0000 (UTC) Received: from krava (unknown [10.43.17.196]) by smtp.corp.redhat.com (Postfix) with SMTP id 770C02026D76; Wed, 4 Jul 2018 15:25:36 +0000 (UTC) Date: Wed, 4 Jul 2018 17:25:36 +0200 From: Jiri Olsa To: Jack Henschel Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: Re: [PATCH V2] perf parser: Improve error message for PMU address filters Message-ID: <20180704152536.GC19164@krava> References: <20180704121345.19025-1-jackdev@mailbox.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180704121345.19025-1-jackdev@mailbox.org> User-Agent: Mutt/1.10.0 (2018-05-17) X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Wed, 04 Jul 2018 15:25:38 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Wed, 04 Jul 2018 15:25:38 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jolsa@redhat.com' RCPT:'' Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 04, 2018 at 02:13:45PM +0200, Jack Henschel wrote: > This is the second version of a patch that improves the error > message of the perf events parser when the PMU hardware does not support > address filters. > > Previously, the perf returned the following error: > > $ perf record -e intel_pt// --filter 'filter sys_write' > > --filter option should follow a -e tracepoint or HW tracer option > This implies there is some syntax error present in the command line, > which is not true. Rather, notify the user that the CPU does not have > support for this feature. > > For example, Intel chips based on the Broadwell micro-archticture have > the Intel PT PMU, but do not support address filtering. > > Now, perf prints the following error message: > > $ perf record -e intel_pt// --filter 'filter sys_write' > > This CPU does not support address filtering > > Signed-off-by: Jack Henschel Acked-by: Jiri Olsa thanks, jirka > --- > tools/perf/util/parse-events.c | 20 ++++++++++---------- > 1 file changed, 10 insertions(+), 10 deletions(-) > > diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c > index 15eec49e71a1..f8cd3e7c9186 100644 > --- a/tools/perf/util/parse-events.c > +++ b/tools/perf/util/parse-events.c > @@ -1991,8 +1991,11 @@ static int set_filter(struct perf_evsel *evsel, const void *arg) > int nr_addr_filters = 0; > struct perf_pmu *pmu = NULL; > > - if (evsel == NULL) > - goto err; > + if (evsel == NULL) { > + fprintf(stderr, > + "--filter option should follow a -e tracepoint or HW tracer option\n"); > + return -1; > + } > > if (evsel->attr.type == PERF_TYPE_TRACEPOINT) { > if (perf_evsel__append_tp_filter(evsel, str) < 0) { > @@ -2014,8 +2017,11 @@ static int set_filter(struct perf_evsel *evsel, const void *arg) > perf_pmu__scan_file(pmu, "nr_addr_filters", > "%d", &nr_addr_filters); > > - if (!nr_addr_filters) > - goto err; > + if (!nr_addr_filters) { > + fprintf(stderr, > + "This CPU does not support address filtering\n"); > + return -1; > + } > > if (perf_evsel__append_addr_filter(evsel, str) < 0) { > fprintf(stderr, > @@ -2024,12 +2030,6 @@ static int set_filter(struct perf_evsel *evsel, const void *arg) > } > > return 0; > - > -err: > - fprintf(stderr, > - "--filter option should follow a -e tracepoint or HW tracer option\n"); > - > - return -1; > } > > int parse_filter(const struct option *opt, const char *str, > -- > 2.18.0 >