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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 1B9EFCA9EAF for ; Mon, 21 Oct 2019 13:41:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E4BB92166E for ; Mon, 21 Oct 2019 13:41:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571665285; bh=NCqa5kDfdg9diKHbg5XzWi27W8i42Jsf97cMO0wx7qI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KH0mAECNq8hi39nwDS7so0H25jKs5TjYPlGevs4S49SgvlCGGvIBmnar2z5dSjh7Z 4RAb/JPO/rx0PZ0ZUc80QuLZngdsgZbk0JoWGBeRpT5GRdF3I7zJvYSd2vll6kZ8M6 ns3A1wbZ4tDFxTh2+CDLZP9CHLix9gGd8fSl5xIU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729682AbfJUNlX (ORCPT ); Mon, 21 Oct 2019 09:41:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:43252 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729659AbfJUNlR (ORCPT ); Mon, 21 Oct 2019 09:41:17 -0400 Received: from quaco.ghostprotocols.net (unknown [179.97.35.50]) (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 9B599214AE; Mon, 21 Oct 2019 13:41:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571665276; bh=NCqa5kDfdg9diKHbg5XzWi27W8i42Jsf97cMO0wx7qI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Fv04R86Pr6MkNDnRTs3VfThuvAHProiZaTTfi7u6DpE9Pp7pJmdY//C+QeIdShwDD f4kbWae6RUwyPcrCAwlGn0DhQxWoidB0yCvSkHpLWjNtEMsTG//g+Jtet3drxMmXM+ N8YH6SYHzbGT4MFjM8fLTzRa8+3AhFNwqfqpYSKQ= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , Alexander Shishkin , Alexey Budankov , Andi Kleen , Jin Yao , Michael Petlan , Peter Zijlstra , Stephane Eranian Subject: [PATCH 47/57] libperf: Add tests_mmap_thread test Date: Mon, 21 Oct 2019 10:38:24 -0300 Message-Id: <20191021133834.25998-48-acme@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191021133834.25998-1-acme@kernel.org> References: <20191021133834.25998-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Olsa Add mmaping tests that generates 100 prctl calls in monitored child process and validates it gets 100 events in ring buffer. Committer tests: # make -C tools/perf/lib tests make: Entering directory '/home/acme/git/perf/tools/perf/lib' LINK test-cpumap-a LINK test-threadmap-a LINK test-evlist-a LINK test-evsel-a LINK test-cpumap-so LINK test-threadmap-so LINK test-evlist-so LINK test-evsel-so running static: - running test-cpumap.c...OK - running test-threadmap.c...OK - running test-evlist.c...OK - running test-evsel.c...OK running dynamic: - running test-cpumap.c...OK - running test-threadmap.c...OK - running test-evlist.c...OK - running test-evsel.c...OK make: Leaving directory '/home/acme/git/perf/tools/perf/lib' # Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Alexey Budankov Cc: Andi Kleen Cc: Jin Yao Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20191017105918.20873-7-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/lib/tests/test-evlist.c | 119 +++++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) diff --git a/tools/perf/lib/tests/test-evlist.c b/tools/perf/lib/tests/test-evlist.c index e6b2ab2e2bde..90a1869ba4b1 100644 --- a/tools/perf/lib/tests/test-evlist.c +++ b/tools/perf/lib/tests/test-evlist.c @@ -1,12 +1,21 @@ // SPDX-License-Identifier: GPL-2.0 #include #include +#include +#include #include +#include +#include +#include +#include #include #include #include #include +#include +#include #include +#include static int libperf_print(enum libperf_print_level level, const char *fmt, va_list ap) @@ -181,6 +190,115 @@ static int test_stat_thread_enable(void) return 0; } +static int test_mmap_thread(void) +{ + struct perf_evlist *evlist; + struct perf_evsel *evsel; + struct perf_mmap *map; + struct perf_cpu_map *cpus; + struct perf_thread_map *threads; + struct perf_event_attr attr = { + .type = PERF_TYPE_TRACEPOINT, + .sample_period = 1, + .wakeup_watermark = 1, + .disabled = 1, + }; + char path[PATH_MAX]; + int id, err, pid, go_pipe[2]; + union perf_event *event; + char bf; + int count = 0; + + snprintf(path, PATH_MAX, "%s/kernel/debug/tracing/events/syscalls/sys_enter_prctl/id", + sysfs__mountpoint()); + + if (filename__read_int(path, &id)) { + fprintf(stderr, "error: failed to get tracepoint id: %s\n", path); + return -1; + } + + attr.config = id; + + err = pipe(go_pipe); + __T("failed to create pipe", err == 0); + + fflush(NULL); + + pid = fork(); + if (!pid) { + int i; + + read(go_pipe[0], &bf, 1); + + /* Generate 100 prctl calls. */ + for (i = 0; i < 100; i++) + prctl(0, 0, 0, 0, 0); + + exit(0); + } + + threads = perf_thread_map__new_dummy(); + __T("failed to create threads", threads); + + cpus = perf_cpu_map__dummy_new(); + __T("failed to create cpus", cpus); + + perf_thread_map__set_pid(threads, 0, pid); + + evlist = perf_evlist__new(); + __T("failed to create evlist", evlist); + + evsel = perf_evsel__new(&attr); + __T("failed to create evsel1", evsel); + + perf_evlist__add(evlist, evsel); + + perf_evlist__set_maps(evlist, cpus, threads); + + err = perf_evlist__open(evlist); + __T("failed to open evlist", err == 0); + + err = perf_evlist__mmap(evlist, 4); + __T("failed to mmap evlist", err == 0); + + perf_evlist__enable(evlist); + + /* kick the child and wait for it to finish */ + write(go_pipe[1], &bf, 1); + waitpid(pid, NULL, 0); + + /* + * There's no need to call perf_evlist__disable, + * monitored process is dead now. + */ + + perf_evlist__for_each_mmap(evlist, map, false) { + if (perf_mmap__read_init(map) < 0) + continue; + + while ((event = perf_mmap__read_event(map)) != NULL) { + count++; + perf_mmap__consume(map); + } + + perf_mmap__read_done(map); + } + + /* calls perf_evlist__munmap/perf_evlist__close */ + perf_evlist__delete(evlist); + + perf_thread_map__put(threads); + perf_cpu_map__put(cpus); + + /* + * The generated prctl calls should match the + * number of events in the buffer. + */ + __T("failed count", count == 100); + + return 0; +} + int main(int argc, char **argv) { __T_START; @@ -190,6 +308,7 @@ int main(int argc, char **argv) test_stat_cpu(); test_stat_thread(); test_stat_thread_enable(); + test_mmap_thread(); __T_OK; return 0; -- 2.21.0