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Subject[tip:perf/core] perf tests: Add map groups sharing with thread object test
Commit-ID:  fabf01238289e9ae009499594fc54642f5802a24
Gitweb: http://git.kernel.org/tip/fabf01238289e9ae009499594fc54642f5802a24
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 17 Mar 2014 14:39:00 +0100
Committer: Jiri Olsa <jolsa@kernel.org>
CommitDate: Mon, 28 Apr 2014 13:43:40 +0200

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.

Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1397490723-1992-6-git-send-email-jolsa@redhat.com
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
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 | 90 ++++++++++++++++++++++++++++++++++++++
4 files changed, 96 insertions(+)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 16d4f4e..46e0c32 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -417,6 +417,7 @@ 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 bb60792..0d5afaf 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -132,6 +132,10 @@ 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 82e8061..a9d7cb0 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -43,6 +43,7 @@ int test__parse_no_sample_id_all(void);
int test__dwarf_unwind(void);
int test__hists_filter(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..2b2e0db
--- /dev/null
+++ b/tools/perf/tests/thread-mg-share.c
@@ -0,0 +1,90 @@
+#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;
+
+ /* 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_VAL("wrong refcnt", 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);
+
+ other_mg = other->mg;
+ TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 2);
+
+ TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg);
+
+ /* release thread group */
+ thread__delete(leader);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 3);
+
+ thread__delete(t1);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
+
+ thread__delete(t2);
+ TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
+
+ thread__delete(t3);
+
+ /* release other group */
+ thread__delete(other_leader);
+ TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 1);
+
+ thread__delete(other);
+
+ /*
+ * Cannot call machine__delete_threads(machine) now,
+ * because we've already released all the threads.
+ */
+
+ machines__exit(&machines);
+ return 0;
+}

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