perf/tests/expand-cgroup.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include "tests.h"
0003 #include "debug.h"
0004 #include "evlist.h"
0005 #include "cgroup.h"
0006 #include "rblist.h"
0007 #include "metricgroup.h"
0008 #include "parse-events.h"
0009 #include "pmu-events/pmu-events.h"
0010 #include "pfm.h"
0011 #include <subcmd/parse-options.h>
0012 #include <stdio.h>
0013 #include <stdlib.h>
0014 #include <string.h>
0015
0016 static int test_expand_events(struct evlist *evlist,
0017                   struct rblist *metric_events)
0018 {
0019     int i, ret = TEST_FAIL;
0020     int nr_events;
0021     bool was_group_event;
0022     int nr_members;  /* for the first evsel only */
0023     const char cgrp_str[] = "A,B,C";
0024     const char *cgrp_name[] = { "A", "B", "C" };
0025     int nr_cgrps = ARRAY_SIZE(cgrp_name);
0026     char **ev_name;
0027     struct evsel *evsel;
0028
0029     TEST_ASSERT_VAL("evlist is empty", !evlist__empty(evlist));
0030
0031     nr_events = evlist->core.nr_entries;
0032     ev_name = calloc(nr_events, sizeof(*ev_name));
0033     if (ev_name == NULL) {
0034         pr_debug("memory allocation failure\n");
0035         return TEST_FAIL;
0036     }
0037     i = 0;
0038     evlist__for_each_entry(evlist, evsel) {
0039         ev_name[i] = strdup(evsel->name);
0040         if (ev_name[i] == NULL) {
0041             pr_debug("memory allocation failure\n");
0042             goto out;
0043         }
0044         i++;
0045     }
0046     /* remember grouping info */
0047     was_group_event = evsel__is_group_event(evlist__first(evlist));
0048     nr_members = evlist__first(evlist)->core.nr_members;
0049
0050     ret = evlist__expand_cgroup(evlist, cgrp_str, metric_events, false);
0051     if (ret < 0) {
0052         pr_debug("failed to expand events for cgroups\n");
0053         goto out;
0054     }
0055
0056     ret = TEST_FAIL;
0057     if (evlist->core.nr_entries != nr_events * nr_cgrps) {
0058         pr_debug("event count doesn't match\n");
0059         goto out;
0060     }
0061
0062     i = 0;
0063     evlist__for_each_entry(evlist, evsel) {
0064         if (strcmp(evsel->name, ev_name[i % nr_events])) {
0065             pr_debug("event name doesn't match:\n");
0066             pr_debug("  evsel[%d]: %s\n  expected: %s\n",
0067                  i, evsel->name, ev_name[i % nr_events]);
0068             goto out;
0069         }
0070         if (strcmp(evsel->cgrp->name, cgrp_name[i / nr_events])) {
0071             pr_debug("cgroup name doesn't match:\n");
0072             pr_debug("  evsel[%d]: %s\n  expected: %s\n",
0073                  i, evsel->cgrp->name, cgrp_name[i / nr_events]);
0074             goto out;
0075         }
0076
0077         if ((i % nr_events) == 0) {
0078             if (evsel__is_group_event(evsel) != was_group_event) {
0079                 pr_debug("event group doesn't match: got %s, expect %s\n",
0080                      evsel__is_group_event(evsel) ? "true" : "false",
0081                      was_group_event ? "true" : "false");
0082                 goto out;
0083             }
0084             if (evsel->core.nr_members != nr_members) {
0085                 pr_debug("event group member doesn't match: %d vs %d\n",
0086                      evsel->core.nr_members, nr_members);
0087                 goto out;
0088             }
0089         }
0090         i++;
0091     }
0092     ret = TEST_OK;
0093
0094 out:    for (i = 0; i < nr_events; i++)
0095         free(ev_name[i]);
0096     free(ev_name);
0097     return ret;
0098 }
0099
0100 static int expand_default_events(void)
0101 {
0102     int ret;
0103     struct rblist metric_events;
0104     struct evlist *evlist = evlist__new_default();
0105
0106     TEST_ASSERT_VAL("failed to get evlist", evlist);
0107
0108     rblist__init(&metric_events);
0109     ret = test_expand_events(evlist, &metric_events);
0110     evlist__delete(evlist);
0111     return ret;
0112 }
0113
0114 static int expand_group_events(void)
0115 {
0116     int ret;
0117     struct evlist *evlist;
0118     struct rblist metric_events;
0119     struct parse_events_error err;
0120     const char event_str[] = "{cycles,instructions}";
0121
0122     symbol_conf.event_group = true;
0123
0124     evlist = evlist__new();
0125     TEST_ASSERT_VAL("failed to get evlist", evlist);
0126
0127     parse_events_error__init(&err);
0128     ret = parse_events(evlist, event_str, &err);
0129     if (ret < 0) {
0130         pr_debug("failed to parse event '%s', err %d, str '%s'\n",
0131              event_str, ret, err.str);
0132         parse_events_error__print(&err, event_str);
0133         goto out;
0134     }
0135
0136     rblist__init(&metric_events);
0137     ret = test_expand_events(evlist, &metric_events);
0138 out:
0139     parse_events_error__exit(&err);
0140     evlist__delete(evlist);
0141     return ret;
0142 }
0143
0144 static int expand_libpfm_events(void)
0145 {
0146     int ret;
0147     struct evlist *evlist;
0148     struct rblist metric_events;
0149     const char event_str[] = "CYCLES";
0150     struct option opt = {
0151         .value = &evlist,
0152     };
0153
0154     symbol_conf.event_group = true;
0155
0156     evlist = evlist__new();
0157     TEST_ASSERT_VAL("failed to get evlist", evlist);
0158
0159     ret = parse_libpfm_events_option(&opt, event_str, 0);
0160     if (ret < 0) {
0161         pr_debug("failed to parse libpfm event '%s', err %d\n",
0162              event_str, ret);
0163         goto out;
0164     }
0165     if (evlist__empty(evlist)) {
0166         pr_debug("libpfm was not enabled\n");
0167         goto out;
0168     }
0169
0170     rblist__init(&metric_events);
0171     ret = test_expand_events(evlist, &metric_events);
0172 out:
0173     evlist__delete(evlist);
0174     return ret;
0175 }
0176
0177 static int expand_metric_events(void)
0178 {
0179     int ret;
0180     struct evlist *evlist;
0181     struct rblist metric_events;
0182     const char metric_str[] = "CPI";
0183     const struct pmu_events_table *pme_test;
0184
0185     evlist = evlist__new();
0186     TEST_ASSERT_VAL("failed to get evlist", evlist);
0187
0188     rblist__init(&metric_events);
0189     pme_test = find_core_events_table("testarch", "testcpu");
0190     ret = metricgroup__parse_groups_test(evlist, pme_test, metric_str,
0191                          false, false, &metric_events);
0192     if (ret < 0) {
0193         pr_debug("failed to parse '%s' metric\n", metric_str);
0194         goto out;
0195     }
0196
0197     ret = test_expand_events(evlist, &metric_events);
0198
0199 out:
0200     metricgroup__rblist_exit(&metric_events);
0201     evlist__delete(evlist);
0202     return ret;
0203 }
0204
0205 static int test__expand_cgroup_events(struct test_suite *test __maybe_unused,
0206                       int subtest __maybe_unused)
0207 {
0208     int ret;
0209
0210     ret = expand_default_events();
0211     TEST_ASSERT_EQUAL("failed to expand default events", ret, 0);
0212
0213     ret = expand_group_events();
0214     TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
0215
0216     ret = expand_libpfm_events();
0217     TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
0218
0219     ret = expand_metric_events();
0220     TEST_ASSERT_EQUAL("failed to expand metric events", ret, 0);
0221
0222     return ret;
0223 }
0224
0225 DEFINE_SUITE("Event expansion for cgroups", expand_cgroup_events);