Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / tools / perf / tests / thread-mg-share.c

diff --git a/kernel/tools/perf/tests/thread-mg-share.c b/kernel/tools/perf/tests/thread-mg-share.c
new file mode 100644 (file)
index 0000000..b028499
--- /dev/null
+++ b/kernel/tools/perf/tests/thread-mg-share.c
@@ -0,0 +1,91 @@
+#include "tests.h"
+#include "machine.h"
+#include "thread.h"
+#include "map.h"
+#include "debug.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;
+}