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=-12.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,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 C82EFC49ED7 for ; Fri, 13 Sep 2019 13:26:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9539020640 for ; Fri, 13 Sep 2019 13:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568381207; bh=DWZyHhMPnv/nMRNALhTzlNOP/x2scsSskurdinfM6xE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=USMQCE8N3Yn1hY9XY0T3xbisF9i89vmrELI+XpWll0vknI0pfgIX0IxZfnKmeQ8aT njHQyric+OT8BJ36UYPLkA/zu6F//Z1kwsPn8iVHCrVLuC1Rz3b3szAwftbcWvdNUL uKaoFtxyc5zi2qsZJxGeI6OGMHnXI5u9yHCcMHGQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390834AbfIMN0r (ORCPT ); Fri, 13 Sep 2019 09:26:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54316 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403849AbfIMN0n (ORCPT ); Fri, 13 Sep 2019 09:26:43 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 38AF97F746; Fri, 13 Sep 2019 13:26:43 +0000 (UTC) Received: from krava.brq.redhat.com (unknown [10.43.17.36]) by smtp.corp.redhat.com (Postfix) with ESMTP id 915EE5C1D4; Fri, 13 Sep 2019 13:26:41 +0000 (UTC) From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: lkml , Ingo Molnar , Namhyung Kim , Alexander Shishkin , Peter Zijlstra , Michael Petlan Subject: [PATCH 69/73] libperf: Add tests_mmap_thread test Date: Fri, 13 Sep 2019 15:23:51 +0200 Message-Id: <20190913132355.21634-70-jolsa@kernel.org> In-Reply-To: <20190913132355.21634-1-jolsa@kernel.org> References: <20190913132355.21634-1-jolsa@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.71]); Fri, 13 Sep 2019 13:26:43 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding mmaping tests that generates 100 prctl calls in monitored child process and validates it gets 100 events in ring buffer. Link: http://lkml.kernel.org/n/tip-5qzuxnmde9x6uojkysp3rldn@git.kernel.org Signed-off-by: Jiri Olsa --- 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..aa90e8d40738 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) { + 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