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perf tests: Show refcounting broken expectations in thread-mg-share test

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To help understand the failure.

  [acme@zoo linux]$ perf test -v 30
  30: Test thread mg sharing                                 :
  --- start ---
  test child forked, pid 12275
  FAILED tests/thread-mg-share.c:68 wrong refcnt (4 != 3)
  test child finished with -1
  ---- end ----
  Test thread mg sharing: FAILED!
  [acme@zoo linux]$

This is under investigation, the thread__delete() calls were replaced
with thread__put(), and those cause mismatches because now we need to be
more judicious with the thread lifetime management.

I.e. previously the thread__delete() would drop the map_group refcount,
but now since thread__put doesn't call thread__delete() necessarily.
because we have other refcount holders, the map_group refcount will not
be as we expected when this test was implemented.

Will be fixed soon...

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-9y8e3f7ukzco5loxvnlitpfq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-05-11 16:30:20 -03:00
parent 021162cf02
commit 8f1960138b
2 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
tools/perf/tests/tests.h
View File

@ -9,6 +9,15 @@ do { \
} \
} while (0)
#define TEST_ASSERT_EQUAL(text, val, expected) \
do { \
if (val != expected) { \
pr_debug("FAILED %s:%d %s (%d != %d)\n", \
__FILE__, __LINE__, text, val, expected); \
return -1; \
} \
} while (0)
enum {
TEST_OK = 0,
TEST_FAIL = -1,

12
tools/perf/tests/thread-mg-share.c
View File

@ -43,7 +43,7 @@ int test__thread_mg_share(void)
leader && t1 && t2 && t3 && other);
mg = leader->mg;
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 4);
TEST_ASSERT_EQUAL("wrong refcnt", mg->refcnt, 4);
/* test the map groups pointer is shared */
TEST_ASSERT_VAL("map groups don't match", mg == t1->mg);
@ -59,25 +59,25 @@ int test__thread_mg_share(void)
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_EQUAL("wrong refcnt", 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_VAL("wrong refcnt", mg->refcnt == 3);
TEST_ASSERT_EQUAL("wrong refcnt", mg->refcnt, 3);
thread__put(t1);
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
TEST_ASSERT_EQUAL("wrong refcnt", mg->refcnt, 2);
thread__put(t2);
TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
TEST_ASSERT_EQUAL("wrong refcnt", mg->refcnt, 1);
thread__put(t3);
/* release other group */
thread__put(other_leader);
TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 1);
TEST_ASSERT_EQUAL("wrong refcnt", other_mg->refcnt, 1);
thread__put(other);