From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- tools/perf/tests/thread-mg-share.c | 99 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 tools/perf/tests/thread-mg-share.c (limited to 'tools/perf/tests/thread-mg-share.c') diff --git a/tools/perf/tests/thread-mg-share.c b/tools/perf/tests/thread-mg-share.c new file mode 100644 index 000000000..b1d1bbafe --- /dev/null +++ b/tools/perf/tests/thread-mg-share.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "tests.h" +#include "machine.h" +#include "thread.h" +#include "map.h" +#include "debug.h" + +int test__thread_mg_share(struct test *test __maybe_unused, int subtest __maybe_unused) +{ + struct machines machines; + struct machine *machine; + + /* thread group */ + struct thread *leader; + struct thread *t1, *t2, *t3; + struct map_groups *mg; + + /* other process */ + struct thread *other, *other_leader; + struct map_groups *other_mg; + + /* + * This test create 2 processes abstractions (struct thread) + * with several threads and checks they properly share and + * maintain map groups info (struct map_groups). + * + * thread group (pid: 0, tids: 0, 1, 2, 3) + * other group (pid: 4, tids: 4, 5) + */ + + machines__init(&machines); + machine = &machines.host; + + /* create process with 4 threads */ + leader = machine__findnew_thread(machine, 0, 0); + t1 = machine__findnew_thread(machine, 0, 1); + t2 = machine__findnew_thread(machine, 0, 2); + t3 = machine__findnew_thread(machine, 0, 3); + + /* and create 1 separated process, without thread leader */ + other = machine__findnew_thread(machine, 4, 5); + + TEST_ASSERT_VAL("failed to create threads", + leader && t1 && t2 && t3 && other); + + mg = leader->mg; + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 4); + + /* test the map groups pointer is shared */ + TEST_ASSERT_VAL("map groups don't match", mg == t1->mg); + TEST_ASSERT_VAL("map groups don't match", mg == t2->mg); + TEST_ASSERT_VAL("map groups don't match", mg == t3->mg); + + /* + * Verify the other leader was created by previous call. + * It should have shared map groups with no change in + * refcnt. + */ + other_leader = machine__find_thread(machine, 4, 4); + TEST_ASSERT_VAL("failed to find other leader", other_leader); + + /* + * Ok, now that all the rbtree related operations were done, + * lets remove all of them from there so that we can do the + * refcounting tests. + */ + machine__remove_thread(machine, leader); + machine__remove_thread(machine, t1); + machine__remove_thread(machine, t2); + machine__remove_thread(machine, t3); + machine__remove_thread(machine, other); + machine__remove_thread(machine, other_leader); + + other_mg = other->mg; + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_mg->refcnt), 2); + + TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg); + + /* release thread group */ + thread__put(leader); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 3); + + thread__put(t1); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 2); + + thread__put(t2); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 1); + + thread__put(t3); + + /* release other group */ + thread__put(other_leader); + TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_mg->refcnt), 1); + + thread__put(other); + + machines__exit(&machines); + return 0; +} -- cgit v1.2.3