xref: /linux/tools/perf/tests/expand-cgroup.c (revision fd7b8e8f)
1 // SPDX-License-Identifier: GPL-2.0
2 #include "tests.h"
3 #include "debug.h"
4 #include "evlist.h"
5 #include "cgroup.h"
6 #include "rblist.h"
7 #include "metricgroup.h"
8 #include "parse-events.h"
9 #include "pmu-events/pmu-events.h"
10 #include "pfm.h"
11 #include <subcmd/parse-options.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 
test_expand_events(struct evlist * evlist,struct rblist * metric_events)16 static int test_expand_events(struct evlist *evlist,
17 			      struct rblist *metric_events)
18 {
19 	int i, ret = TEST_FAIL;
20 	int nr_events;
21 	bool was_group_event;
22 	int nr_members;  /* for the first evsel only */
23 	const char cgrp_str[] = "A,B,C";
24 	const char *cgrp_name[] = { "A", "B", "C" };
25 	int nr_cgrps = ARRAY_SIZE(cgrp_name);
26 	char **ev_name;
27 	struct evsel *evsel;
28 
29 	TEST_ASSERT_VAL("evlist is empty", !evlist__empty(evlist));
30 
31 	nr_events = evlist->core.nr_entries;
32 	ev_name = calloc(nr_events, sizeof(*ev_name));
33 	if (ev_name == NULL) {
34 		pr_debug("memory allocation failure\n");
35 		return TEST_FAIL;
36 	}
37 	i = 0;
38 	evlist__for_each_entry(evlist, evsel) {
39 		ev_name[i] = strdup(evsel->name);
40 		if (ev_name[i] == NULL) {
41 			pr_debug("memory allocation failure\n");
42 			goto out;
43 		}
44 		i++;
45 	}
46 	/* remember grouping info */
47 	was_group_event = evsel__is_group_event(evlist__first(evlist));
48 	nr_members = evlist__first(evlist)->core.nr_members;
49 
50 	ret = evlist__expand_cgroup(evlist, cgrp_str, metric_events, false);
51 	if (ret < 0) {
52 		pr_debug("failed to expand events for cgroups\n");
53 		goto out;
54 	}
55 
56 	ret = TEST_FAIL;
57 	if (evlist->core.nr_entries != nr_events * nr_cgrps) {
58 		pr_debug("event count doesn't match\n");
59 		goto out;
60 	}
61 
62 	i = 0;
63 	evlist__for_each_entry(evlist, evsel) {
64 		if (!evsel__name_is(evsel, ev_name[i % nr_events])) {
65 			pr_debug("event name doesn't match:\n");
66 			pr_debug("  evsel[%d]: %s\n  expected: %s\n",
67 				 i, evsel->name, ev_name[i % nr_events]);
68 			goto out;
69 		}
70 		if (strcmp(evsel->cgrp->name, cgrp_name[i / nr_events])) {
71 			pr_debug("cgroup name doesn't match:\n");
72 			pr_debug("  evsel[%d]: %s\n  expected: %s\n",
73 				 i, evsel->cgrp->name, cgrp_name[i / nr_events]);
74 			goto out;
75 		}
76 
77 		if ((i % nr_events) == 0) {
78 			if (evsel__is_group_event(evsel) != was_group_event) {
79 				pr_debug("event group doesn't match: got %s, expect %s\n",
80 					 evsel__is_group_event(evsel) ? "true" : "false",
81 					 was_group_event ? "true" : "false");
82 				goto out;
83 			}
84 			if (evsel->core.nr_members != nr_members) {
85 				pr_debug("event group member doesn't match: %d vs %d\n",
86 					 evsel->core.nr_members, nr_members);
87 				goto out;
88 			}
89 		}
90 		i++;
91 	}
92 	ret = TEST_OK;
93 
94 out:	for (i = 0; i < nr_events; i++)
95 		free(ev_name[i]);
96 	free(ev_name);
97 	return ret;
98 }
99 
expand_default_events(void)100 static int expand_default_events(void)
101 {
102 	int ret;
103 	struct rblist metric_events;
104 	struct evlist *evlist = evlist__new_default();
105 
106 	TEST_ASSERT_VAL("failed to get evlist", evlist);
107 
108 	rblist__init(&metric_events);
109 	ret = test_expand_events(evlist, &metric_events);
110 	evlist__delete(evlist);
111 	return ret;
112 }
113 
expand_group_events(void)114 static int expand_group_events(void)
115 {
116 	int ret;
117 	struct evlist *evlist;
118 	struct rblist metric_events;
119 	struct parse_events_error err;
120 	const char event_str[] = "{cycles,instructions}";
121 
122 	symbol_conf.event_group = true;
123 
124 	evlist = evlist__new();
125 	TEST_ASSERT_VAL("failed to get evlist", evlist);
126 
127 	parse_events_error__init(&err);
128 	ret = parse_events(evlist, event_str, &err);
129 	if (ret < 0) {
130 		pr_debug("failed to parse event '%s', err %d\n", event_str, ret);
131 		parse_events_error__print(&err, event_str);
132 		goto out;
133 	}
134 
135 	rblist__init(&metric_events);
136 	ret = test_expand_events(evlist, &metric_events);
137 out:
138 	parse_events_error__exit(&err);
139 	evlist__delete(evlist);
140 	return ret;
141 }
142 
expand_libpfm_events(void)143 static int expand_libpfm_events(void)
144 {
145 	int ret;
146 	struct evlist *evlist;
147 	struct rblist metric_events;
148 	const char event_str[] = "CYCLES";
149 	struct option opt = {
150 		.value = &evlist,
151 	};
152 
153 	symbol_conf.event_group = true;
154 
155 	evlist = evlist__new();
156 	TEST_ASSERT_VAL("failed to get evlist", evlist);
157 
158 	ret = parse_libpfm_events_option(&opt, event_str, 0);
159 	if (ret < 0) {
160 		pr_debug("failed to parse libpfm event '%s', err %d\n",
161 			 event_str, ret);
162 		goto out;
163 	}
164 	if (evlist__empty(evlist)) {
165 		pr_debug("libpfm was not enabled\n");
166 		goto out;
167 	}
168 
169 	rblist__init(&metric_events);
170 	ret = test_expand_events(evlist, &metric_events);
171 out:
172 	evlist__delete(evlist);
173 	return ret;
174 }
175 
expand_metric_events(void)176 static int expand_metric_events(void)
177 {
178 	int ret;
179 	struct evlist *evlist;
180 	struct rblist metric_events;
181 	const char metric_str[] = "CPI";
182 	const struct pmu_metrics_table *pme_test;
183 
184 	evlist = evlist__new();
185 	TEST_ASSERT_VAL("failed to get evlist", evlist);
186 
187 	rblist__init(&metric_events);
188 	pme_test = find_core_metrics_table("testarch", "testcpu");
189 	ret = metricgroup__parse_groups_test(evlist, pme_test, metric_str, &metric_events);
190 	if (ret < 0) {
191 		pr_debug("failed to parse '%s' metric\n", metric_str);
192 		goto out;
193 	}
194 
195 	ret = test_expand_events(evlist, &metric_events);
196 
197 out:
198 	metricgroup__rblist_exit(&metric_events);
199 	evlist__delete(evlist);
200 	return ret;
201 }
202 
test__expand_cgroup_events(struct test_suite * test __maybe_unused,int subtest __maybe_unused)203 static int test__expand_cgroup_events(struct test_suite *test __maybe_unused,
204 				      int subtest __maybe_unused)
205 {
206 	int ret;
207 
208 	ret = expand_default_events();
209 	TEST_ASSERT_EQUAL("failed to expand default events", ret, 0);
210 
211 	ret = expand_group_events();
212 	TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
213 
214 	ret = expand_libpfm_events();
215 	TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
216 
217 	ret = expand_metric_events();
218 	TEST_ASSERT_EQUAL("failed to expand metric events", ret, 0);
219 
220 	return ret;
221 }
222 
223 DEFINE_SUITE("Event expansion for cgroups", expand_cgroup_events);
224