expand-cgroup.c

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