[PATCH] perf test: Disable breakpoint signal tests for powerpc

From: Jiri Olsa
Date: Tue May 16 2017 - 13:50:06 EST


Following tests are constantly failing on powerpc:

# perf test break
18: Breakpoint overflow signal handler : FAILED!
19: Breakpoint overflow sampling : FAILED!

The powerpc so far does not have support to even create
instruction breakpoint using the perf event interface,
so those tests fail early in the config phase.

I added 'ison' callback to test struct to be able to
disable specific test. It seems better than putting
ifdefs directly to the test array.

Link: http://lkml.kernel.org/n/tip-erwshbq6f7b7hdtu65z5a25y@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/tests/bp_signal.c | 14 ++++++++++++++
tools/perf/tests/builtin-test.c | 7 +++++++
tools/perf/tests/tests.h | 3 +++
3 files changed, 24 insertions(+)

diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c
index e7664fe3bd33..0467c3b6d849 100644
--- a/tools/perf/tests/bp_signal.c
+++ b/tools/perf/tests/bp_signal.c
@@ -288,3 +288,17 @@ int test__bp_signal(int subtest __maybe_unused)
return count1 == 1 && overflows == 3 && count2 == 3 && overflows_2 == 3 && count3 == 2 ?
TEST_OK : TEST_FAIL;
}
+
+bool test__bp_signal_is_on(void)
+{
+/*
+ * The powerpc so far does not have support to even create
+ * instruction breakpoint using the perf event interface.
+ * Once it's there we can release this.
+ */
+#ifdef __powerpc__
+ return false;
+#else
+ return true;
+#endif
+}
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 9e08d297f1a9..ddbbff7e4148 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -97,10 +97,12 @@ static struct test generic_tests[] = {
{
.desc = "Breakpoint overflow signal handler",
.func = test__bp_signal,
+ .ison = test__bp_signal_is_on,
},
{
.desc = "Breakpoint overflow sampling",
.func = test__bp_signal_overflow,
+ .ison = test__bp_signal_is_on,
},
{
.desc = "Number of exit events of a simple workload",
@@ -401,6 +403,11 @@ static int __cmd_test(int argc, const char *argv[], struct intlist *skiplist)
if (!perf_test__matches(t, curr, argc, argv))
continue;

+ if (t->ison && !t->ison()) {
+ pr_debug("%2d: %-*s: Disabled\n", i, width, t->desc);
+ continue;
+ }
+
pr_info("%2d: %-*s:", i, width, t->desc);

if (intlist__find(skiplist, i)) {
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 631859629403..1e72f14845c6 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -34,6 +34,7 @@ struct test {
int (*get_nr)(void);
const char *(*get_desc)(int subtest);
} subtest;
+ bool (*ison)(void);
};

/* Tests */
@@ -99,6 +100,8 @@ const char *test__clang_subtest_get_desc(int subtest);
int test__clang_subtest_get_nr(void);
int test__unit_number__scnprint(int subtest);

+bool test__bp_signal_is_on(void);
+
#if defined(__arm__) || defined(__aarch64__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
struct thread;
--
2.9.4