[PATCH v2 2/2] perf tests: Add a pmus core functionality test suite

[Ian Rogers <irogers@google.com>]

Test behavior of PMU names and comparisons wrt suffixes using Intel
uncore_cha and marvell mrvl_ddr_pmu as examples.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/tests/Build          |   1 +
 tools/perf/tests/builtin-test.c |   1 +
 tools/perf/tests/pmus.c         | 108 ++++++++++++++++++++++++++++++++
 tools/perf/tests/tests.h        |   2 +
 4 files changed, 112 insertions(+)
 create mode 100644 tools/perf/tests/pmus.c

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index c7f9d9676095..a7bab6e9300f 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -14,6 +14,7 @@ perf-y += perf-record.o
 perf-y += evsel-roundtrip-name.o
 perf-$(CONFIG_LIBTRACEEVENT) += evsel-tp-sched.o
 perf-y += fdarray.o
+perf-y += pmus.o
 perf-y += pmu.o
 perf-y += pmu-events.o
 perf-y += hists_common.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index d13ee7683d9d..c90f270a469a 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -68,6 +68,7 @@ static struct test_suite *generic_tests[] = {
 	&suite__parse_events,
 	&suite__expr,
 	&suite__PERF_RECORD,
+	&suite__pmus,
 	&suite__pmu,
 	&suite__pmu_events,
 	&suite__dso_data,
diff --git a/tools/perf/tests/pmus.c b/tools/perf/tests/pmus.c
new file mode 100644
index 000000000000..6279c925e689
--- /dev/null
+++ b/tools/perf/tests/pmus.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+#include "pmus.h"
+#include "tests.h"
+#include <string.h>
+#include <linux/kernel.h>
+
+static const char * const uncore_chas[] = {
+	"uncore_cha_0",
+	"uncore_cha_1",
+	"uncore_cha_2",
+	"uncore_cha_3",
+	"uncore_cha_4",
+	"uncore_cha_5",
+	"uncore_cha_6",
+	"uncore_cha_7",
+	"uncore_cha_8",
+	"uncore_cha_9",
+	"uncore_cha_10",
+	"uncore_cha_11",
+	"uncore_cha_12",
+	"uncore_cha_13",
+	"uncore_cha_14",
+	"uncore_cha_15",
+	"uncore_cha_16",
+	"uncore_cha_17",
+	"uncore_cha_18",
+	"uncore_cha_19",
+	"uncore_cha_20",
+	"uncore_cha_21",
+	"uncore_cha_22",
+	"uncore_cha_23",
+	"uncore_cha_24",
+	"uncore_cha_25",
+	"uncore_cha_26",
+	"uncore_cha_27",
+	"uncore_cha_28",
+	"uncore_cha_29",
+	"uncore_cha_30",
+	"uncore_cha_31",
+};
+
+static const char * const mrvl_ddrs[] = {
+	"mrvl_ddr_pmu_87e1b0000000",
+	"mrvl_ddr_pmu_87e1b1000000",
+	"mrvl_ddr_pmu_87e1b2000000",
+	"mrvl_ddr_pmu_87e1b3000000",
+	"mrvl_ddr_pmu_87e1b4000000",
+	"mrvl_ddr_pmu_87e1b5000000",
+	"mrvl_ddr_pmu_87e1b6000000",
+	"mrvl_ddr_pmu_87e1b7000000",
+	"mrvl_ddr_pmu_87e1b8000000",
+	"mrvl_ddr_pmu_87e1b9000000",
+	"mrvl_ddr_pmu_87e1ba000000",
+	"mrvl_ddr_pmu_87e1bb000000",
+	"mrvl_ddr_pmu_87e1bc000000",
+	"mrvl_ddr_pmu_87e1bd000000",
+	"mrvl_ddr_pmu_87e1be000000",
+	"mrvl_ddr_pmu_87e1bf000000",
+};
+
+static int test__name_len(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+{
+	TEST_ASSERT_EQUAL("cpu", pmu_name_len_no_suffix("cpu"), (int)strlen("cpu"));
+	TEST_ASSERT_EQUAL("i915", pmu_name_len_no_suffix("i915"), (int)strlen("i915"));
+	for (size_t i = 0; i < ARRAY_SIZE(uncore_chas); i++) {
+		TEST_ASSERT_EQUAL("Strips uncore_cha suffix",
+				pmu_name_len_no_suffix(uncore_chas[i]),
+				(int)strlen("uncore_cha"));
+	}
+	for (size_t i = 0; i < ARRAY_SIZE(mrvl_ddrs); i++) {
+		TEST_ASSERT_EQUAL("Strips mrvl_ddr_pmu suffix",
+				pmu_name_len_no_suffix(mrvl_ddrs[i]),
+				(int)strlen("mrvl_ddr_pmu"));
+	}
+	return TEST_OK;
+}
+
+static int test__name_cmp(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
+{
+	TEST_ASSERT_EQUAL("cpu", pmu_name_cmp("cpu", "cpu"), 0);
+	TEST_ASSERT_EQUAL("i915", pmu_name_cmp("i915", "i915"), 0);
+	TEST_ASSERT_VAL("i915", pmu_name_cmp("cpu", "i915") < 0);
+	TEST_ASSERT_VAL("i915", pmu_name_cmp("i915", "cpu") > 0);
+	for (size_t i = 1; i < ARRAY_SIZE(uncore_chas); i++) {
+		TEST_ASSERT_VAL("uncore_cha suffixes ordered lt",
+				pmu_name_cmp(uncore_chas[i-1], uncore_chas[i]) < 0);
+		TEST_ASSERT_VAL("uncore_cha suffixes ordered gt",
+				pmu_name_cmp(uncore_chas[i], uncore_chas[i-1]) > 0);
+	}
+	for (size_t i = 1; i < ARRAY_SIZE(mrvl_ddrs); i++) {
+		TEST_ASSERT_VAL("mrvl_ddr_pmu suffixes ordered lt",
+				pmu_name_cmp(mrvl_ddrs[i-1], mrvl_ddrs[i]) < 0);
+		TEST_ASSERT_VAL("mrvl_ddr_pmu suffixes ordered gt",
+				pmu_name_cmp(mrvl_ddrs[i], mrvl_ddrs[i-1]) > 0);
+	}
+	return TEST_OK;
+}
+
+static struct test_case tests__pmus[] = {
+	TEST_CASE("PMU name combining", name_len),
+	TEST_CASE("PMU name comparison", name_cmp),
+	{	.name = NULL, }
+};
+
+struct test_suite suite__pmus = {
+	.desc = "PMUs test",
+	.test_cases = tests__pmus,
+};
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 3aa7701ee0e9..03278f0f7698 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -3,6 +3,7 @@
 #define TESTS_H
 
 #include <stdbool.h>
+#include <debug.h>
 
 enum {
 	TEST_OK   =  0,
@@ -81,6 +82,7 @@ DECLARE_SUITE(PERF_RECORD);
 DECLARE_SUITE(perf_evsel__roundtrip_name_test);
 DECLARE_SUITE(perf_evsel__tp_sched_test);
 DECLARE_SUITE(syscall_openat_tp_fields);
+DECLARE_SUITE(pmus);
 DECLARE_SUITE(pmu);
 DECLARE_SUITE(pmu_events);
 DECLARE_SUITE(attr);
-- 
2.44.0.478.gd926399ef9-goog