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Date: Tue, 18 Mar 2014 15:46:56 +0100
From: Jiri Olsa <jolsa@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Jiri Olsa <jolsa@...hat.com>, Don Zickus <dzickus@...hat.com>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Ingo Molnar <mingo@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Subject: [PATCH 6/6] perf tests: Add map groups sharing with thread object test
This test create 2 processes abstractions, with several threads
and checks they properly share and maintain map groups info.
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
---
tools/perf/Makefile.perf | 1 +
tools/perf/tests/builtin-test.c | 4 ++
tools/perf/tests/tests.h | 1 +
tools/perf/tests/thread-mg-share.c | 110 +++++++++++++++++++++++++++++++++++++
4 files changed, 116 insertions(+)
create mode 100644 tools/perf/tests/thread-mg-share.c
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 667e85a..ffa6cac 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -415,6 +415,7 @@ LIB_OBJS += $(OUTPUT)tests/dwarf-unwind.o
endif
endif
LIB_OBJS += $(OUTPUT)tests/mmap-thread-lookup.o
+LIB_OBJS += $(OUTPUT)tests/thread-mg-share.o
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index d947d1a..a1145d1 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -128,6 +128,10 @@ static struct test {
.func = test__mmap_thread_lookup,
},
{
+ .desc = "Test thread mg sharing",
+ .func = test__thread_mg_share,
+ },
+ {
.func = NULL,
},
};
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 6db764c..5ed3bd5 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -42,6 +42,7 @@ int test__keep_tracking(void);
int test__parse_no_sample_id_all(void);
int test__dwarf_unwind(void);
int test__mmap_thread_lookup(void);
+int test__thread_mg_share(void);
#if defined(__x86_64__) || defined(__i386__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
diff --git a/tools/perf/tests/thread-mg-share.c b/tools/perf/tests/thread-mg-share.c
new file mode 100644
index 0000000..43cbd8b
--- /dev/null
+++ b/tools/perf/tests/thread-mg-share.c
@@ -0,0 +1,110 @@
+#include "tests.h"
+#include "machine.h"
+#include "thread.h"
+#include "map.h"
+
+int test__thread_mg_share(void)
+{
+ struct machines machines;
+ struct machine *machine;
+
+ /* thread group */
+ struct thread *leader;
+ struct thread *t1, *t2, *t3;
+ struct map_groups *mg;
+ struct map_groups *mg1, *mg2, *mg3;
+
+ /* other process */
+ struct thread *other, *other_leader;
+ struct map_groups *mg_other, *mg_other_leader;
+
+ /*
+ * 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);
+
+ /* requests map groups for each thread in the group */
+ mg = thread__map_groups_get(leader);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
+
+ mg1 = thread__map_groups_get(t1);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
+
+ mg2 = thread__map_groups_get(t2);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 3);
+
+ mg3 = thread__map_groups_get(t3);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 4);
+
+ /* test the map groups pointer is shared */
+ TEST_ASSERT_VAL("map groups don't match", mg == mg1);
+ TEST_ASSERT_VAL("map groups don't match", mg == mg2);
+ TEST_ASSERT_VAL("map groups don't match", mg == mg3);
+
+ /*
+ * Now get map groups for other thread (not thread leader)
+ * Its refcnt should be 2 because of the thread leader being
+ * included.
+ */
+ mg_other = thread__map_groups_get(other);
+ TEST_ASSERT_VAL("wrong refcnt", mg_other->refcnt == 2);
+
+ /*
+ * 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);
+
+ mg_other_leader = thread__map_groups_get(other_leader);
+ TEST_ASSERT_VAL("map groups don't match", mg_other_leader == mg_other);
+ TEST_ASSERT_VAL("wrong refcnt", mg_other_leader->refcnt == 2);
+
+ /* release thread group */
+ thread__map_groups_put(leader);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 3);
+ TEST_ASSERT_VAL("wrong mg", leader->mg == NULL);
+
+ thread__map_groups_put(t1);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
+ TEST_ASSERT_VAL("wrong mg", t1->mg == NULL);
+
+ thread__map_groups_put(t2);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
+ TEST_ASSERT_VAL("wrong mg", t2->mg == NULL);
+
+ thread__map_groups_put(t3);
+ TEST_ASSERT_VAL("wrong mg", t3->mg == NULL);
+
+ /* release other group */
+ thread__map_groups_put(other_leader);
+ TEST_ASSERT_VAL("wrong refcnt", mg_other_leader->refcnt == 1);
+ TEST_ASSERT_VAL("wrong mg", other_leader->mg == NULL);
+
+ thread__map_groups_put(other);
+ TEST_ASSERT_VAL("wrong mg", other->mg == NULL);
+
+ machine__delete_threads(machine);
+ machines__exit(&machines);
+ return 0;
+}
--
1.8.3.1
--
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