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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 1862BC433DF for ; Mon, 25 May 2020 14:19:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EEF282087D for ; Mon, 25 May 2020 14:19:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390910AbgEYOTu (ORCPT ); Mon, 25 May 2020 10:19:50 -0400 Received: from mga09.intel.com ([134.134.136.24]:48211 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388714AbgEYOTt (ORCPT ); Mon, 25 May 2020 10:19:49 -0400 IronPort-SDR: XHTztFJml496+MdIkc430Hyy2GYvwF8k6FrViQVf0a25v5n1csyVYHoFQZuB6HAV+dvTWmxWwI vxy0EO3mZ1OQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 May 2020 07:19:49 -0700 IronPort-SDR: CDyUaMXxaWdaoaXwvAUmcEJOdkNOFl35LFEjII4cTB0HTc/MwxK0P4RHg0CDh9gpoixvKIZ32D 2W82sWzLw3uQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,433,1583222400"; d="scan'208";a="256233900" Received: from linux.intel.com ([10.54.29.200]) by fmsmga008.fm.intel.com with ESMTP; 25 May 2020 07:19:48 -0700 Received: from [10.249.227.191] (abudanko-mobl.ccr.corp.intel.com [10.249.227.191]) by linux.intel.com (Postfix) with ESMTP id 7420F580101; Mon, 25 May 2020 07:19:46 -0700 (PDT) Subject: [PATCH v4 04/10] perf stat: factor out event handling loop into a function From: Alexey Budankov To: Arnaldo Carvalho de Melo Cc: Jiri Olsa , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Ingo Molnar , Andi Kleen , linux-kernel References: <653fe5f3-c986-a841-1ed8-0a7d2fa24c00@linux.intel.com> Organization: Intel Corp. Message-ID: <5f42c6c5-c301-accd-928e-4304fb1c15d0@linux.intel.com> Date: Mon, 25 May 2020 17:19:45 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <653fe5f3-c986-a841-1ed8-0a7d2fa24c00@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 Factor out event handling loop into dispatch_events() function. Signed-off-by: Alexey Budankov --- tools/perf/builtin-stat.c | 93 ++++++++++++++++++++++++--------------- 1 file changed, 58 insertions(+), 35 deletions(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c43ba6080691..ef2682a87491 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -421,6 +421,24 @@ static void process_interval(void) print_counters(&rs, 0, NULL); } +static bool print_interval(unsigned int interval, int *times) +{ + if (interval) { + process_interval(); + if (interval_count && !(--(*times))) + return true; + } + return false; +} + +static bool process_timeout(bool timeout, unsigned int interval, int *times) +{ + if (timeout) + return true; + else + return print_interval(interval, times); +} + static void enable_counters(void) { if (stat_config.initial_delay) @@ -486,6 +504,42 @@ static bool is_target_alive(struct target *_target, return false; } +static int dispatch_events(pid_t pid, struct perf_stat_config *config) +{ + pid_t child = 0; + bool stop = false; + struct timespec time_to_sleep; + int sleep_time, status = 0; + int times = config->times; + + if (config->interval) + sleep_time = config->interval; + else if (config->timeout) + sleep_time = config->timeout; + else + sleep_time = 1000; + + time_to_sleep.tv_sec = sleep_time / MSEC_PER_SEC; + time_to_sleep.tv_nsec = (sleep_time % MSEC_PER_SEC) * NSEC_PER_MSEC; + + do { + if (pid != -1) { + child = waitpid(pid, &status, WNOHANG); + } else { + if (!stop) + stop = !is_target_alive(&target, evsel_list->core.threads); + } + + if (child || stop || done) + break; + + nanosleep(&time_to_sleep, NULL); + stop = process_timeout(config->timeout, config->interval, ×); + } while (1); + + return status; +} + enum counter_recovery { COUNTER_SKIP, COUNTER_RETRY, @@ -544,12 +598,10 @@ static enum counter_recovery stat_handle_error(struct evsel *counter) static int __run_perf_stat(int argc, const char **argv, int run_idx) { int interval = stat_config.interval; - int times = stat_config.times; int timeout = stat_config.timeout; char msg[BUFSIZ]; unsigned long long t0, t1; struct evsel *counter; - struct timespec ts; size_t l; int status = 0; const bool forks = (argc > 0); @@ -558,17 +610,6 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) int i, cpu; bool second_pass = false; - if (interval) { - ts.tv_sec = interval / USEC_PER_MSEC; - ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC; - } else if (timeout) { - ts.tv_sec = timeout / USEC_PER_MSEC; - ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC; - } else { - ts.tv_sec = 1; - ts.tv_nsec = 0; - } - if (forks) { if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) { @@ -725,16 +766,9 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) perf_evlist__start_workload(evsel_list); enable_counters(); - if (interval || timeout) { - while (!waitpid(child_pid, &status, WNOHANG)) { - nanosleep(&ts, NULL); - if (timeout) - break; - process_interval(); - if (interval_count && !(--times)) - break; - } - } + if (interval || timeout) + dispatch_events(child_pid, &stat_config); + if (child_pid != -1) { if (timeout) kill(child_pid, SIGTERM); @@ -751,18 +785,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx) psignal(WTERMSIG(status), argv[0]); } else { enable_counters(); - while (!done) { - nanosleep(&ts, NULL); - if (!is_target_alive(&target, evsel_list->core.threads)) - break; - if (timeout) - break; - if (interval) { - process_interval(); - if (interval_count && !(--times)) - break; - } - } + dispatch_events(-1, &stat_config); } disable_counters(); -- 2.24.1