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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 C4406C6786E for ; Fri, 26 Oct 2018 07:34:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8279220834 for ; Fri, 26 Oct 2018 07:34:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8279220834 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zytor.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 S1726387AbeJZQKO (ORCPT ); Fri, 26 Oct 2018 12:10:14 -0400 Received: from terminus.zytor.com ([198.137.202.136]:48571 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725941AbeJZQKN (ORCPT ); Fri, 26 Oct 2018 12:10:13 -0400 Received: from terminus.zytor.com (localhost [127.0.0.1]) by terminus.zytor.com (8.15.2/8.15.2) with ESMTPS id w9Q7XvOC137172 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 26 Oct 2018 00:33:57 -0700 Received: (from tipbot@localhost) by terminus.zytor.com (8.15.2/8.15.2/Submit) id w9Q7Xu8E137169; Fri, 26 Oct 2018 00:33:56 -0700 Date: Fri, 26 Oct 2018 00:33:56 -0700 X-Authentication-Warning: terminus.zytor.com: tipbot set sender to tipbot@zytor.com using -f From: tip-bot for Jiri Olsa Message-ID: Cc: peterz@infradead.org, eranian@google.com, hpa@zytor.com, namhyung@kernel.org, jolsa@kernel.org, linux-kernel@vger.kernel.org, alexander.shishkin@linux.intel.com, mingo@kernel.org, acme@redhat.com, yao.jin@linux.intel.com, tglx@linutronix.de Reply-To: namhyung@kernel.org, linux-kernel@vger.kernel.org, jolsa@kernel.org, alexander.shishkin@linux.intel.com, peterz@infradead.org, eranian@google.com, hpa@zytor.com, acme@redhat.com, tglx@linutronix.de, yao.jin@linux.intel.com, mingo@kernel.org In-Reply-To: <20181022093015.9106-1-jolsa@kernel.org> References: <20181022093015.9106-1-jolsa@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf stat: Poll for monitored tasks being alive Git-Commit-ID: cbb5df7e96070f1f728ff7885443646ebba703d4 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: cbb5df7e96070f1f728ff7885443646ebba703d4 Gitweb: https://git.kernel.org/tip/cbb5df7e96070f1f728ff7885443646ebba703d4 Author: Jiri Olsa AuthorDate: Mon, 22 Oct 2018 11:30:15 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Mon, 22 Oct 2018 12:37:52 -0300 perf stat: Poll for monitored tasks being alive Adding the check for tasks we monitor via -p/-t options, and finish stat if there's no longer task to monitor. Requested-by: Stephane Eranian Signed-off-by: Jiri Olsa Cc: Alexander Shishkin Cc: Jin Yao Cc: Namhyung Kim Cc: Peter Zijlstra Tested-by: Arnaldo Carvalho de Melo Link: http://lkml.kernel.org/r/20181022093015.9106-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-stat.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index b86aba1c8028..d1028d7755bb 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -409,6 +409,28 @@ static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel) return leader; } +static bool is_target_alive(struct target *_target, + struct thread_map *threads) +{ + struct stat st; + int i; + + if (!target__has_task(_target)) + return true; + + for (i = 0; i < threads->nr; i++) { + char path[PATH_MAX]; + + scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), + threads->map[i].pid); + + if (!stat(path, &st)) + return true; + } + + return false; +} + static int __run_perf_stat(int argc, const char **argv, int run_idx) { int interval = stat_config.interval; @@ -579,6 +601,8 @@ try_again: enable_counters(); while (!done) { nanosleep(&ts, NULL); + if (!is_target_alive(&target, evsel_list->threads)) + break; if (timeout) break; if (interval) {