perf test: Provide a subtest callback to ask for the reason for skipping a subtest

Now subtests can inform why a test was skipped. The upcoming patch
improvint PMU event metric testing will use it.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200513212933.41273-1-irogers@google.com
[ split from a larger patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 3471ec5..baee735 100644 (file)
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -429,8 +429,15 @@ static int test_and_print(struct test *t, bool force_skip, int subtest)
        case TEST_OK:
                pr_info(" Ok\n");
                break;
-       case TEST_SKIP:
-               color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
+       case TEST_SKIP: {
+               const char *skip_reason = NULL;
+               if (t->subtest.skip_reason)
+                       skip_reason = t->subtest.skip_reason(subtest);
+               if (skip_reason)
+                       color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip (%s)\n", skip_reason);
+               else
+                       color_fprintf(stderr, PERF_COLOR_YELLOW, " Skip\n");
+       }
                break;
        case TEST_FAIL:
        default:

diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index d6d4ac3..88e45ae 100644 (file)
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -34,6 +34,7 @@ struct test {
                bool skip_if_fail;
                int (*get_nr)(void);
                const char *(*get_desc)(int subtest);
+               const char *(*skip_reason)(int subtest);
        } subtest;
        bool (*is_supported)(void);
        void *priv;