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=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT 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 5B63AC46475 for ; Thu, 25 Oct 2018 11:11:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1F79A20840 for ; Thu, 25 Oct 2018 11:11:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="KJ8yXerc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1F79A20840 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 S1727696AbeJYTnl (ORCPT ); Thu, 25 Oct 2018 15:43:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:47518 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727666AbeJYTnl (ORCPT ); Thu, 25 Oct 2018 15:43:41 -0400 Received: from jouet.infradead.org (unknown [179.97.41.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DC57D20834; Thu, 25 Oct 2018 11:11:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1540465883; bh=7BGsifh1trlqbFkyHPGsPj786te5+wjSizHZkcaBHUg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KJ8yXercaU91DcTM5b/KVdGBog31o6yHO6Z8zssPt3StvbHdwwsQk6tiebYUpLFvu iJfYWG/keFIHa+DnBui4R4xTkW+ysBgH0F0+lV5LK+4NKOKasIDl/AAWAmXWFqU4DP gyUCQGYZFawI/9Y1kXwTYPVKKyrlHOCvFCA427ZU= From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Jiri Olsa , Alexander Shishkin , Jin Yao , Namhyung Kim , Peter Zijlstra , Arnaldo Carvalho de Melo Subject: [PATCH 12/37] perf stat: Poll for monitored tasks being alive Date: Thu, 25 Oct 2018 08:10:06 -0300 Message-Id: <20181025111031.3440-13-acme@kernel.org> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20181025111031.3440-1-acme@kernel.org> References: <20181025111031.3440-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Olsa 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 @@ 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) { -- 2.14.4