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=-7.0 required=3.0 tests=INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 07B24C67863 for ; Mon, 22 Oct 2018 09:30:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 97D512083A for ; Mon, 22 Oct 2018 09:30:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97D512083A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1727670AbeJVRsD (ORCPT ); Mon, 22 Oct 2018 13:48:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56096 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727388AbeJVRsD (ORCPT ); Mon, 22 Oct 2018 13:48:03 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3477783F44; Mon, 22 Oct 2018 09:30:18 +0000 (UTC) Received: from krava.brq.redhat.com (unknown [10.43.17.150]) by smtp.corp.redhat.com (Postfix) with ESMTP id 03DA35D6A9; Mon, 22 Oct 2018 09:30:15 +0000 (UTC) From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: Jin Yao , lkml , Ingo Molnar , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Stephane Eranian Subject: [PATCH] perf stat: Poll for monitored tasks being alive Date: Mon, 22 Oct 2018 11:30:15 +0200 Message-Id: <20181022093015.9106-1-jolsa@kernel.org> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Mon, 22 Oct 2018 09:30:18 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding the check for tasks we monitor via -p/-t options, and finish stat if there's no longer task to monitor. Cc: Jin Yao Requested-by: Stephane Eranian Link: http://lkml.kernel.org/n/tip-dfqvnvz0oqu5zg149aquz1jb@git.kernel.org Signed-off-by: Jiri Olsa --- 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 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) enable_counters(); while (!done) { nanosleep(&ts, NULL); + if (!is_target_alive(&target, evsel_list->threads)) + break; if (timeout) break; if (interval) { -- 2.17.2