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=-11.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 A0AA3C433E2 for ; Tue, 14 Jul 2020 09:11:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7EC9921D7B for ; Tue, 14 Jul 2020 09:11:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727024AbgGNJLM (ORCPT ); Tue, 14 Jul 2020 05:11:12 -0400 Received: from mga12.intel.com ([192.55.52.136]:46758 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725793AbgGNJLL (ORCPT ); Tue, 14 Jul 2020 05:11:11 -0400 IronPort-SDR: z03tTkhtc1eF/6sQa0q8o2EKIdwzcLvYp5BTnNuvkdrTiD6AXKTxwpRn1Yi8cgUtZ/vWk3WhNy FYo5JvkGwqHA== X-IronPort-AV: E=McAfee;i="6000,8403,9681"; a="128412143" X-IronPort-AV: E=Sophos;i="5.75,350,1589266800"; d="scan'208";a="128412143" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jul 2020 02:11:11 -0700 IronPort-SDR: +quqQ8AoB6l1/clKGjr/Ost3L2MAOgZ9HPmGoRHsNitdy+o/+CPmH1PGJiEXpN8W1VX0abxXuQ 0zQnXtGWLGsQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,350,1589266800"; d="scan'208";a="281689249" Received: from linux.intel.com ([10.54.29.200]) by orsmga003.jf.intel.com with ESMTP; 14 Jul 2020 02:11:11 -0700 Received: from [10.249.230.149] (abudanko-mobl.ccr.corp.intel.com [10.249.230.149]) by linux.intel.com (Postfix) with ESMTP id 05710580810; Tue, 14 Jul 2020 02:11:08 -0700 (PDT) Subject: [PATCH v11 13/15] perf record: extend -D,--delay option with -1 value From: Alexey Budankov To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Ingo Molnar , Andi Kleen , linux-kernel References: <037d737f-0ada-a9f0-9686-f7521ca6fbc3@linux.intel.com> Organization: Intel Corp. Message-ID: <7723c606-cbd8-ae21-9f61-9fa116bc65d0@linux.intel.com> Date: Tue, 14 Jul 2020 12:11:07 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <037d737f-0ada-a9f0-9686-f7521ca6fbc3@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Extend -D,--delay option with -1 to start collection with events disabled to be enabled later by 'enable' command provided via control file descriptor. Signed-off-by: Alexey Budankov --- tools/perf/Documentation/perf-record.txt | 5 +++-- tools/perf/builtin-record.c | 12 ++++++++---- tools/perf/builtin-trace.c | 2 +- tools/perf/util/record.h | 2 +- 4 files changed, 13 insertions(+), 8 deletions(-) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index fa8a5fcd27ab..a84376605805 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -407,8 +407,9 @@ if combined with -a or -C options. -D:: --delay=:: -After starting the program, wait msecs before measuring. This is useful to -filter out the startup phase of the program, which is often very different. +After starting the program, wait msecs before measuring (-1: start with events +disabled). This is useful to filter out the startup phase of the program, which +is often very different. -I:: --intr-regs:: diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 19b1d5effb7a..cd1892c4844b 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -1749,8 +1749,12 @@ static int __cmd_record(struct record *rec, int argc, const char **argv) } if (opts->initial_delay) { - usleep(opts->initial_delay * USEC_PER_MSEC); - evlist__enable(rec->evlist); + pr_info(EVLIST_DISABLED_MSG); + if (opts->initial_delay > 0) { + usleep(opts->initial_delay * USEC_PER_MSEC); + evlist__enable(rec->evlist); + pr_info(EVLIST_ENABLED_MSG); + } } trigger_ready(&auxtrace_snapshot_trigger); @@ -2462,8 +2466,8 @@ static struct option __record_options[] = { OPT_CALLBACK('G', "cgroup", &record.evlist, "name", "monitor event in cgroup name only", parse_cgroups), - OPT_UINTEGER('D', "delay", &record.opts.initial_delay, - "ms to wait before starting measurement after program start"), + OPT_INTEGER('D', "delay", &record.opts.initial_delay, + "ms to wait before starting measurement after program start (-1: start with events disabled)"), OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"), OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", "user to profile"), diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index a333a9a64f27..bea461b6f937 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -4812,7 +4812,7 @@ int cmd_trace(int argc, const char **argv) "per thread proc mmap processing timeout in ms"), OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", trace__parse_cgroups), - OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, + OPT_INTEGER('D', "delay", &trace.opts.initial_delay, "ms to wait before starting measurement after program " "start"), OPTS_EVSWITCH(&trace.evswitch), diff --git a/tools/perf/util/record.h b/tools/perf/util/record.h index 39d1de4b2a36..da138dcb4d34 100644 --- a/tools/perf/util/record.h +++ b/tools/perf/util/record.h @@ -61,7 +61,7 @@ struct record_opts { const char *auxtrace_snapshot_opts; const char *auxtrace_sample_opts; bool sample_transaction; - unsigned initial_delay; + int initial_delay; bool use_clockid; clockid_t clockid; u64 clockid_res_ns; -- 2.24.1