From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759050AbeAIPgX (ORCPT + 1 other); Tue, 9 Jan 2018 10:36:23 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59132 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758991AbeAIPgU (ORCPT ); Tue, 9 Jan 2018 10:36:20 -0500 From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker , lkml , Ingo Molnar , Namhyung Kim , David Ahern , Andi Kleen , Alexander Shishkin , Peter Zijlstra Subject: [PATCH 20/49] perf tools: Add a test case for timed thread handling Date: Tue, 9 Jan 2018 16:34:53 +0100 Message-Id: <20180109153522.14116-21-jolsa@kernel.org> In-Reply-To: <20180109153522.14116-1-jolsa@kernel.org> References: <20180109153522.14116-1-jolsa@kernel.org> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 09 Jan 2018 15:36:20 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Namhyung Kim A test case for verifying live and dead thread tree management during time change and new machine__find{,new}_thread_time(). Cc: Frederic Weisbecker Link: http://lkml.kernel.org/n/tip-owolpbhyg7e46jp1egd3zhyp@git.kernel.org Signed-off-by: Namhyung Kim Signed-off-by: Jiri Olsa --- tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test.c | 4 + tools/perf/tests/tests.h | 1 + tools/perf/tests/thread-lookup-time.c | 181 ++++++++++++++++++++++++++++++++++ 4 files changed, 187 insertions(+) create mode 100644 tools/perf/tests/thread-lookup-time.c diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index ca961bed1bb1..973ee29c4235 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -25,6 +25,7 @@ perf-y += sw-clock.o perf-y += mmap-thread-lookup.o perf-y += thread-comm.o perf-y += thread-mg-share.o +perf-y += thread-lookup-time.o perf-y += switch-tracking.o perf-y += keep-tracking.o perf-y += code-reading.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 6c715e030dfd..755f14661c7a 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -275,6 +275,10 @@ static struct test generic_tests[] = { .func = test__thread_comm, }, { + .desc = "Test thread lookup with time", + .func = test__thread_lookup_time, + }, + { .func = NULL, }, }; diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index d7880e5207ec..65aacf9c342d 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -103,6 +103,7 @@ const char *test__clang_subtest_get_desc(int subtest); int test__clang_subtest_get_nr(void); int test__unit_number__scnprint(struct test *test, int subtest); int test__thread_comm(struct test *test, int subtest); +int test__thread_lookup_time(struct test *test, int subtest); bool test__bp_signal_is_supported(void); diff --git a/tools/perf/tests/thread-lookup-time.c b/tools/perf/tests/thread-lookup-time.c new file mode 100644 index 000000000000..88e5bd5a7432 --- /dev/null +++ b/tools/perf/tests/thread-lookup-time.c @@ -0,0 +1,181 @@ +#include +#include +#include "tests.h" +#include "machine.h" +#include "thread.h" +#include "map.h" +#include "debug.h" + +static int thread__print_cb(struct thread *th, void *arg __maybe_unused) +{ + printf("thread: %d, start time: %"PRIu64" %s\n", + th->tid, th->start_time, + th->dead ? "(dead)" : th->exited ? "(exited)" : ""); + return 0; +} + +static int lookup_with_timestamp(struct machine *machine) +{ + struct thread *t1, *t2, *t3; + union perf_event fork_event = { + .fork = { + .pid = 0, + .tid = 0, + .ppid = 1, + .ptid = 1, + }, + }; + struct perf_sample sample = { + .time = 50000, + }; + + /* this is needed to keep dead threads in rbtree */ + perf_has_index = true; + + /* start_time is set to 0 */ + t1 = machine__findnew_thread(machine, 0, 0); + + if (verbose > 1) { + printf("========= after t1 created ==========\n"); + machine__for_each_thread(machine, thread__print_cb, NULL); + } + + TEST_ASSERT_VAL("wrong start time of old thread", t1->start_time == 0); + + TEST_ASSERT_VAL("cannot find current thread", + machine__find_thread(machine, 0, 0) == t1); + + TEST_ASSERT_VAL("cannot find current thread with time", + machine__findnew_thread_by_time(machine, 0, 0, 10000) == t1); + + /* start_time is overwritten to new value */ + thread__set_comm(t1, "/usr/bin/perf", 20000); + + if (verbose > 1) { + printf("========= after t1 set comm ==========\n"); + machine__for_each_thread(machine, thread__print_cb, NULL); + } + + TEST_ASSERT_VAL("failed to update start time", t1->start_time == 20000); + + TEST_ASSERT_VAL("should not find passed thread", + /* this will create yet another dead thread */ + machine__findnew_thread_by_time(machine, 0, 0, 10000) != t1); + + TEST_ASSERT_VAL("cannot find overwritten thread with time", + machine__find_thread_by_time(machine, 0, 0, 20000) == t1); + + /* now t1 goes to dead thread tree, and create t2 */ + machine__process_fork_event(machine, &fork_event, &sample); + + if (verbose > 1) { + printf("========= after t2 forked ==========\n"); + machine__for_each_thread(machine, thread__print_cb, NULL); + } + + t2 = machine__find_thread(machine, 0, 0); + + TEST_ASSERT_VAL("cannot find current thread", t2 != NULL); + + TEST_ASSERT_VAL("wrong start time of new thread", t2->start_time == 50000); + + TEST_ASSERT_VAL("dead thread cannot be found", + machine__find_thread_by_time(machine, 0, 0, 10000) != t1); + + TEST_ASSERT_VAL("cannot find dead thread after new thread", + machine__find_thread_by_time(machine, 0, 0, 30000) == t1); + + TEST_ASSERT_VAL("cannot find current thread after new thread", + machine__find_thread_by_time(machine, 0, 0, 50000) == t2); + + /* now t2 goes to dead thread tree, and create t3 */ + sample.time = 60000; + machine__process_fork_event(machine, &fork_event, &sample); + + if (verbose > 1) { + printf("========= after t3 forked ==========\n"); + machine__for_each_thread(machine, thread__print_cb, NULL); + } + + t3 = machine__find_thread(machine, 0, 0); + TEST_ASSERT_VAL("cannot find current thread", t3 != NULL); + + TEST_ASSERT_VAL("wrong start time of new thread", t3->start_time == 60000); + + TEST_ASSERT_VAL("cannot find dead thread after new thread", + machine__findnew_thread_by_time(machine, 0, 0, 30000) == t1); + + TEST_ASSERT_VAL("cannot find dead thread after new thread", + machine__findnew_thread_by_time(machine, 0, 0, 50000) == t2); + + TEST_ASSERT_VAL("cannot find current thread after new thread", + machine__findnew_thread_by_time(machine, 0, 0, 70000) == t3); + + machine__delete_threads(machine); + return 0; +} + +static int lookup_without_timestamp(struct machine *machine) +{ + struct thread *t1, *t2, *t3; + union perf_event fork_event = { + .fork = { + .pid = 0, + .tid = 0, + .ppid = 1, + .ptid = 1, + }, + }; + struct perf_sample sample = { + .time = -1ULL, + }; + + t1 = machine__findnew_thread(machine, 0, 0); + TEST_ASSERT_VAL("cannot find current thread", t1 != NULL); + + TEST_ASSERT_VAL("cannot find new thread with time", + machine__findnew_thread_by_time(machine, 0, 0, -1ULL) == t1); + + machine__process_fork_event(machine, &fork_event, &sample); + + t2 = machine__find_thread(machine, 0, 0); + TEST_ASSERT_VAL("cannot find current thread", t2 != NULL); + + TEST_ASSERT_VAL("cannot find new thread with time", + machine__find_thread_by_time(machine, 0, 0, -1ULL) == t2); + + machine__process_fork_event(machine, &fork_event, &sample); + + t3 = machine__find_thread(machine, 0, 0); + TEST_ASSERT_VAL("cannot find current thread", t3 != NULL); + + TEST_ASSERT_VAL("cannot find new thread with time", + machine__findnew_thread_by_time(machine, 0, 0, -1ULL) == t3); + + machine__delete_threads(machine); + return 0; +} + +int test__thread_lookup_time(struct test *test __maybe_unused, int subtest __maybe_unused) +{ + struct machines machines; + struct machine *machine; + + /* + * This test is to check whether it can retrieve a correct + * thread for a given time. When multi-file data storage is + * enabled, those task/comm/mmap events are processed first so + * the later sample should find a matching thread properly. + */ + machines__init(&machines); + machine = &machines.host; + + if (lookup_with_timestamp(machine) < 0) + return -1; + + if (lookup_without_timestamp(machine) < 0) + return -1; + + machines__exit(&machines); + return 0; +} -- 2.13.6