tools/perf/tests/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
  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 (strcmp(evsel->name, 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
 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
 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, str '%s'\n",
 131                          event_str, ret, err.str);
 132                 parse_events_error__print(&err, event_str);
 133                 goto out;
 134         }
 135
 136         rblist__init(&metric_events);
 137         ret = test_expand_events(evlist, &metric_events);
 138 out:
 139         parse_events_error__exit(&err);
 140         evlist__delete(evlist);
 141         return ret;
 142 }
 143
 144 static int expand_libpfm_events(void)
 145 {
 146         int ret;
 147         struct evlist *evlist;
 148         struct rblist metric_events;
 149         const char event_str[] = "CYCLES";
 150         struct option opt = {
 151                 .value = &evlist,
 152         };
 153
 154         symbol_conf.event_group = true;
 155
 156         evlist = evlist__new();
 157         TEST_ASSERT_VAL("failed to get evlist", evlist);
 158
 159         ret = parse_libpfm_events_option(&opt, event_str, 0);
 160         if (ret < 0) {
 161                 pr_debug("failed to parse libpfm event '%s', err %d\n",
 162                          event_str, ret);
 163                 goto out;
 164         }
 165         if (evlist__empty(evlist)) {
 166                 pr_debug("libpfm was not enabled\n");
 167                 goto out;
 168         }
 169
 170         rblist__init(&metric_events);
 171         ret = test_expand_events(evlist, &metric_events);
 172 out:
 173         evlist__delete(evlist);
 174         return ret;
 175 }
 176
 177 static int expand_metric_events(void)
 178 {
 179         int ret;
 180         struct evlist *evlist;
 181         struct rblist metric_events;
 182         const char metric_str[] = "CPI";
 183
 184         struct pmu_event pme_test[] = {
 185                 {
 186                         .metric_expr    = "instructions / cycles",
 187                         .metric_name    = "IPC",
 188                 },
 189                 {
 190                         .metric_expr    = "1 / IPC",
 191                         .metric_name    = "CPI",
 192                 },
 193                 {
 194                         .metric_expr    = NULL,
 195                         .metric_name    = NULL,
 196                 },
 197         };
 198         const struct pmu_events_map ev_map = {
 199                 .cpuid          = "test",
 200                 .version        = "1",
 201                 .type           = "core",
 202                 .table          = pme_test,
 203         };
 204
 205         evlist = evlist__new();
 206         TEST_ASSERT_VAL("failed to get evlist", evlist);
 207
 208         rblist__init(&metric_events);
 209         ret = metricgroup__parse_groups_test(evlist, &ev_map, metric_str,
 210                                              false, false, &metric_events);
 211         if (ret < 0) {
 212                 pr_debug("failed to parse '%s' metric\n", metric_str);
 213                 goto out;
 214         }
 215
 216         ret = test_expand_events(evlist, &metric_events);
 217
 218 out:
 219         metricgroup__rblist_exit(&metric_events);
 220         evlist__delete(evlist);
 221         return ret;
 222 }
 223
 224 static int test__expand_cgroup_events(struct test_suite *test __maybe_unused,
 225                                       int subtest __maybe_unused)
 226 {
 227         int ret;
 228
 229         ret = expand_default_events();
 230         TEST_ASSERT_EQUAL("failed to expand default events", ret, 0);
 231
 232         ret = expand_group_events();
 233         TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
 234
 235         ret = expand_libpfm_events();
 236         TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
 237
 238         ret = expand_metric_events();
 239         TEST_ASSERT_EQUAL("failed to expand metric events", ret, 0);
 240
 241         return ret;
 242 }
 243
 244 DEFINE_SUITE("Event expansion for cgroups", expand_cgroup_events);