1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Test support for libpfm4 event encodings.
  4 *
  5 * Copyright 2020 Google LLC.
  6 */
  7#include "tests.h"
  8#include "util/debug.h"
  9#include "util/evlist.h"
 10#include "util/pfm.h"
 11
 12#include <linux/kernel.h>
 13
 14#ifdef HAVE_LIBPFM
 15static int count_pfm_events(struct perf_evlist *evlist)
 16{
 17	struct perf_evsel *evsel;
 18	int count = 0;
 19
 20	perf_evlist__for_each_entry(evlist, evsel) {
 21		count++;
 22	}
 23	return count;
 24}
 25
 26static int test__pfm_events(struct test_suite *test __maybe_unused,
 27			    int subtest __maybe_unused)
 28{
 29	struct evlist *evlist;
 30	struct option opt;
 31	size_t i;
 32	const struct {
 33		const char *events;
 34		int nr_events;
 35	} table[] = {
 36		{
 37			.events = "",
 38			.nr_events = 0,
 39		},
 40		{
 41			.events = "instructions",
 42			.nr_events = 1,
 43		},
 44		{
 45			.events = "instructions,cycles",
 46			.nr_events = 2,
 47		},
 48		{
 49			.events = "stereolab",
 50			.nr_events = 0,
 51		},
 52		{
 53			.events = "instructions,instructions",
 54			.nr_events = 2,
 55		},
 56		{
 57			.events = "stereolab,instructions",
 58			.nr_events = 0,
 59		},
 60		{
 61			.events = "instructions,stereolab",
 62			.nr_events = 1,
 63		},
 64	};
 65
 66	for (i = 0; i < ARRAY_SIZE(table); i++) {
 67		evlist = evlist__new();
 68		if (evlist == NULL)
 69			return -ENOMEM;
 70
 71		opt.value = evlist;
 72		parse_libpfm_events_option(&opt,
 73					table[i].events,
 74					0);
 75		TEST_ASSERT_EQUAL(table[i].events,
 76				count_pfm_events(&evlist->core),
 77				table[i].nr_events);
 78		TEST_ASSERT_EQUAL(table[i].events,
 79				evlist->core.nr_groups,
 80				0);
 81
 82		evlist__delete(evlist);
 83	}
 84	return 0;
 85}
 86
 87static int test__pfm_group(struct test_suite *test __maybe_unused,
 88			   int subtest __maybe_unused)
 89{
 90	struct evlist *evlist;
 91	struct option opt;
 92	size_t i;
 93	const struct {
 94		const char *events;
 95		int nr_events;
 96		int nr_groups;
 97	} table[] = {
 98		{
 99			.events = "{},",
100			.nr_events = 0,
101			.nr_groups = 0,
102		},
103		{
104			.events = "{instructions}",
105			.nr_events = 1,
106			.nr_groups = 1,
107		},
108		{
109			.events = "{instructions},{}",
110			.nr_events = 1,
111			.nr_groups = 1,
112		},
113		{
114			.events = "{},{instructions}",
115			.nr_events = 1,
116			.nr_groups = 1,
117		},
118		{
119			.events = "{instructions},{instructions}",
120			.nr_events = 2,
121			.nr_groups = 2,
122		},
123		{
124			.events = "{instructions,cycles},{instructions,cycles}",
125			.nr_events = 4,
126			.nr_groups = 2,
127		},
128		{
129			.events = "{stereolab}",
130			.nr_events = 0,
131			.nr_groups = 0,
132		},
133		{
134			.events =
135			"{instructions,cycles},{instructions,stereolab}",
136			.nr_events = 3,
137			.nr_groups = 1,
138		},
139		{
140			.events = "instructions}",
141			.nr_events = 1,
142			.nr_groups = 0,
143		},
144		{
145			.events = "{{instructions}}",
146			.nr_events = 0,
147			.nr_groups = 0,
148		},
149	};
150
151	for (i = 0; i < ARRAY_SIZE(table); i++) {
152		evlist = evlist__new();
153		if (evlist == NULL)
154			return -ENOMEM;
155
156		opt.value = evlist;
157		parse_libpfm_events_option(&opt,
158					table[i].events,
159					0);
160		TEST_ASSERT_EQUAL(table[i].events,
161				count_pfm_events(&evlist->core),
162				table[i].nr_events);
163		TEST_ASSERT_EQUAL(table[i].events,
164				evlist->core.nr_groups,
165				table[i].nr_groups);
166
167		evlist__delete(evlist);
168	}
169	return 0;
170}
171#else
172static int test__pfm_events(struct test_suite *test __maybe_unused,
173			    int subtest __maybe_unused)
174{
175	return TEST_SKIP;
176}
177
178static int test__pfm_group(struct test_suite *test __maybe_unused,
179			   int subtest __maybe_unused)
180{
181	return TEST_SKIP;
182}
183#endif
184
185static struct test_case pfm_tests[] = {
186	TEST_CASE_REASON("test of individual --pfm-events", pfm_events, "not compiled in"),
187	TEST_CASE_REASON("test groups of --pfm-events", pfm_group, "not compiled in"),
188	{ .name = NULL, }
189};
190
191struct test_suite suite__pfm = {
192	.desc = "Test libpfm4 support",
193	.test_cases = pfm_tests,
194};