[PATCH v2 11/11] perf test: add expr test for pmu metrics

Ian Rogers
2020-04-22T22:05:11Z

Add basic floating point number test.
Verify that all pmu metrics, for the current architecture, parse.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/tests/builtin-test.c | 5 ++
tools/perf/tests/expr.c | 96 ++++++++++++++++++++++++++++++++-
tools/perf/tests/tests.h | 2 +
3 files changed, 102 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index b6322eb0f423..28d547951f6b 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -63,6 +63,11 @@ static struct test generic_tests[] = {
{
.desc = "Simple expression parser",
.func = test__expr,
+ .subtest = {
+ .get_nr = test__expr_subtest_get_nr,
+ .get_desc = test__expr_subtest_get_desc,
+ },
+
},
{
.desc = "PERF_RECORD_* events & perf_sample fields",
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index ea10fc4412c4..35af232eb01d 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -1,9 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
+#include "pmu-events/pmu-events.h"
#include "util/debug.h"
#include "util/expr.h"
#include "tests.h"
#include <stdlib.h>
#include <string.h>
+#include <linux/kernel.h>
#include <linux/zalloc.h>

static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
@@ -16,7 +18,7 @@ static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
return 0;
}

-int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
+static int parse_tests(void)
{
const char *p;
const char **other;
@@ -39,6 +41,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
ret |= test(&ctx, "min(1,2) + 1", 2);
ret |= test(&ctx, "max(1,2) + 1", 3);
ret |= test(&ctx, "1+1 if 3*4 else 0", 2);
+ ret |= test(&ctx, "1.1 + 2.1", 3.2);

if (ret)
return ret;
@@ -65,3 +68,94 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)

return 0;
}
+
+static int pmu_tests(void)
+{
+ struct pmu_events_map *map;
+ struct pmu_event *pe;
+ int i, j, k;
+ const char **ids;
+ int idnum;
+ int ret = 0;
+ struct expr_parse_ctx ctx;
+ double result;
+
+ i = 0;
+ for (;;) {
+ map = &pmu_events_map[i++];
+ if (!map->table) {
+ map = NULL;
+ break;
+ }
+ j = 0;
+ for (;;) {
+ pe = &map->table[j++];
+ if (!pe->name && !pe->metric_group && !pe->metric_name)
+ break;
+ if (!pe->metric_expr)
+ continue;
+ if (expr__find_other(pe->metric_expr, NULL,
+ &ids, &idnum) < 0) {
+ pr_debug("Parse other failed for map %s %s %s\n",
+ map->cpuid, map->version, map->type);
+ pr_debug("On metric %s\n", pe->metric_name);
+ pr_debug("On expression %s\n", pe->metric_expr);
+ ret++;
+ continue;
+ }
+ expr__ctx_init(&ctx);
+ /*
+ * Add all ids with a made up value. The value may
+ * trigger divide by zero when subtracted and so try to
+ * make them unique.
+ */
+ for (k = 0; k < idnum; k++)
+ expr__add_id(&ctx, ids[k], k + 1);
+
+ if (expr__parse(&result, &ctx, pe->metric_expr)) {
+ pr_debug("Parse failed for map %s %s %s\n",
+ map->cpuid, map->version, map->type);
+ pr_debug("On metric %s\n", pe->metric_name);
+ pr_debug("On expression %s\n", pe->metric_expr);
+ ret++;
+ }
+ for (k = 0; k < idnum; k++)
+ zfree(&ids[k]);
+ free(ids);
+ }
+ }
+ return ret;
+}
+
+static const struct {
+ int (*func)(void);
+ const char *desc;
+} expr_testcase_table[] = {
+ {
+ .func = parse_tests,
+ .desc = "Basic expressions",
+ },
+ {
+ .func = pmu_tests,
+ .desc = "Parsing of pmu metrics",
+ },
+};
+
+const char *test__expr_subtest_get_desc(int i)
+{
+ if (i < 0 || i >= (int)ARRAY_SIZE(expr_testcase_table))
+ return NULL;
+ return expr_testcase_table[i].desc;
+}
+
+int test__expr_subtest_get_nr(void)
+{
+ return (int)ARRAY_SIZE(expr_testcase_table);
+}
+
+int test__expr(struct test *test __maybe_unused, int i __maybe_unused)
+{
+ if (i < 0 || i >= (int)ARRAY_SIZE(expr_testcase_table))
+ return TEST_FAIL;
+ return expr_testcase_table[i].func();
+}
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 61a1ab032080..315d64ffd14c 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -72,6 +72,8 @@ int test__keep_tracking(struct test *test, int subtest);
int test__parse_no_sample_id_all(struct test *test, int subtest);
int test__dwarf_unwind(struct test *test, int subtest);
int test__expr(struct test *test, int subtest);
+const char *test__expr_subtest_get_desc(int subtest);
+int test__expr_subtest_get_nr(void);
int test__hists_filter(struct test *test, int subtest);
int test__mmap_thread_lookup(struct test *test, int subtest);
int test__thread_maps_share(struct test *test, int subtest);
--
2.26.2.303.gf8c07b1a785-goog