pfm.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Test support for libpfm4 event encodings.
  4 *
  5 * Copyright 2020 Google LLC.
  6 */
  7#include <errno.h>
  8#include "tests.h"
  9#include "util/debug.h"
 10#include "util/evlist.h"
 11#include "util/pfm.h"
 12
 13#include <linux/kernel.h>
 14
 15#ifdef HAVE_LIBPFM
 16static int count_pfm_events(struct perf_evlist *evlist)
 17{
 18	struct perf_evsel *evsel;
 19	int count = 0;
 20
 21	perf_evlist__for_each_entry(evlist, evsel) {
 22		count++;
 23	}
 24	return count;
 25}
 26
 27static int test__pfm_events(struct test_suite *test __maybe_unused,
 28			    int subtest __maybe_unused)
 29{
 30	struct evlist *evlist;
 31	struct option opt;
 32	size_t i;
 33	const struct {
 34		const char *events;
 35		int nr_events;
 36	} table[] = {
 37		{
 38			.events = "",
 39			.nr_events = 0,
 40		},
 41		{
 42			.events = "instructions",
 43			.nr_events = 1,
 44		},
 45		{
 46			.events = "instructions,cycles",
 47			.nr_events = 2,
 48		},
 49		{
 50			.events = "stereolab",
 51			.nr_events = 0,
 52		},
 53		{
 54			.events = "instructions,instructions",
 55			.nr_events = 2,
 56		},
 57		{
 58			.events = "stereolab,instructions",
 59			.nr_events = 0,
 60		},
 61		{
 62			.events = "instructions,stereolab",
 63			.nr_events = 1,
 64		},
 65	};
 66
 67	for (i = 0; i < ARRAY_SIZE(table); i++) {
 68		evlist = evlist__new();
 69		if (evlist == NULL)
 70			return -ENOMEM;
 71
 72		opt.value = evlist;
 73		parse_libpfm_events_option(&opt,
 74					table[i].events,
 75					0);
 76		TEST_ASSERT_EQUAL(table[i].events,
 77				count_pfm_events(&evlist->core),
 78				table[i].nr_events);
 79		TEST_ASSERT_EQUAL(table[i].events,
 80				evlist__nr_groups(evlist),
 81				0);
 82
 83		evlist__delete(evlist);
 84	}
 85	return 0;
 86}
 87
 88static int test__pfm_group(struct test_suite *test __maybe_unused,
 89			   int subtest __maybe_unused)
 90{
 91	struct evlist *evlist;
 92	struct option opt;
 93	size_t i;
 94	const struct {
 95		const char *events;
 96		int nr_events;
 97		int nr_groups;
 98	} table[] = {
 99		{
100			.events = "{},",
101			.nr_events = 0,
102			.nr_groups = 0,
103		},
104		{
105			.events = "{instructions}",
106			.nr_events = 1,
107			.nr_groups = 0,
108		},
109		{
110			.events = "{instructions},{}",
111			.nr_events = 1,
112			.nr_groups = 0,
113		},
114		{
115			.events = "{},{instructions}",
116			.nr_events = 1,
117			.nr_groups = 0,
118		},
119		{
120			.events = "{instructions},{instructions}",
121			.nr_events = 2,
122			.nr_groups = 0,
123		},
124		{
125			.events = "{instructions,cycles},{instructions,cycles}",
126			.nr_events = 4,
127			.nr_groups = 2,
128		},
129		{
130			.events = "{stereolab}",
131			.nr_events = 0,
132			.nr_groups = 0,
133		},
134		{
135			.events =
136			"{instructions,cycles},{instructions,stereolab}",
137			.nr_events = 3,
138			.nr_groups = 1,
139		},
140		{
141			.events = "instructions}",
142			.nr_events = 1,
143			.nr_groups = 0,
144		},
145		{
146			.events = "{{instructions}}",
147			.nr_events = 0,
148			.nr_groups = 0,
149		},
150	};
151
152	for (i = 0; i < ARRAY_SIZE(table); i++) {
153		evlist = evlist__new();
154		if (evlist == NULL)
155			return -ENOMEM;
156
157		opt.value = evlist;
158		parse_libpfm_events_option(&opt,
159					table[i].events,
160					0);
161		TEST_ASSERT_EQUAL(table[i].events,
162				count_pfm_events(&evlist->core),
163				table[i].nr_events);
164		TEST_ASSERT_EQUAL(table[i].events,
165				evlist__nr_groups(evlist),
166				table[i].nr_groups);
167
168		evlist__delete(evlist);
169	}
170	return 0;
171}
172#else
173static int test__pfm_events(struct test_suite *test __maybe_unused,
174			    int subtest __maybe_unused)
175{
176	return TEST_SKIP;
177}
178
179static int test__pfm_group(struct test_suite *test __maybe_unused,
180			   int subtest __maybe_unused)
181{
182	return TEST_SKIP;
183}
184#endif
185
186static struct test_case pfm_tests[] = {
187	TEST_CASE_REASON("test of individual --pfm-events", pfm_events, "not compiled in"),
188	TEST_CASE_REASON("test groups of --pfm-events", pfm_group, "not compiled in"),
189	{ .name = NULL, }
190};
191
192struct test_suite suite__pfm = {
193	.desc = "Test libpfm4 support",
194	.test_cases = pfm_tests,
195};