tools/perf/tests/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 "tests.h"
   8 #include "util/debug.h"
   9 #include "util/evlist.h"
  10 #include "util/pfm.h"
  11
  12 #include <linux/kernel.h>
  13
  14 #ifdef HAVE_LIBPFM
  15 static int test__pfm_events(void);
  16 static int test__pfm_group(void);
  17 #endif
  18
  19 static const struct {
  20         int (*func)(void);
  21         const char *desc;
  22 } pfm_testcase_table[] = {
  23 #ifdef HAVE_LIBPFM
  24         {
  25                 .func = test__pfm_events,
  26                 .desc = "test of individual --pfm-events",
  27         },
  28         {
  29                 .func = test__pfm_group,
  30                 .desc = "test groups of --pfm-events",
  31         },
  32 #endif
  33 };
  34
  35 #ifdef HAVE_LIBPFM
  36 static int count_pfm_events(struct perf_evlist *evlist)
  37 {
  38         struct perf_evsel *evsel;
  39         int count = 0;
  40
  41         perf_evlist__for_each_entry(evlist, evsel) {
  42                 count++;
  43         }
  44         return count;
  45 }
  46
  47 static int test__pfm_events(void)
  48 {
  49         struct evlist *evlist;
  50         struct option opt;
  51         size_t i;
  52         const struct {
  53                 const char *events;
  54                 int nr_events;
  55         } table[] = {
  56                 {
  57                         .events = "",
  58                         .nr_events = 0,
  59                 },
  60                 {
  61                         .events = "instructions",
  62                         .nr_events = 1,
  63                 },
  64                 {
  65                         .events = "instructions,cycles",
  66                         .nr_events = 2,
  67                 },
  68                 {
  69                         .events = "stereolab",
  70                         .nr_events = 0,
  71                 },
  72                 {
  73                         .events = "instructions,instructions",
  74                         .nr_events = 2,
  75                 },
  76                 {
  77                         .events = "stereolab,instructions",
  78                         .nr_events = 0,
  79                 },
  80                 {
  81                         .events = "instructions,stereolab",
  82                         .nr_events = 1,
  83                 },
  84         };
  85
  86         for (i = 0; i < ARRAY_SIZE(table); i++) {
  87                 evlist = evlist__new();
  88                 if (evlist == NULL)
  89                         return -ENOMEM;
  90
  91                 opt.value = evlist;
  92                 parse_libpfm_events_option(&opt,
  93                                         table[i].events,
  94                                         0);
  95                 TEST_ASSERT_EQUAL(table[i].events,
  96                                 count_pfm_events(&evlist->core),
  97                                 table[i].nr_events);
  98                 TEST_ASSERT_EQUAL(table[i].events,
  99                                 evlist->core.nr_groups,
 100                                 0);
 101
 102                 evlist__delete(evlist);
 103         }
 104         return 0;
 105 }
 106
 107 static int test__pfm_group(void)
 108 {
 109         struct evlist *evlist;
 110         struct option opt;
 111         size_t i;
 112         const struct {
 113                 const char *events;
 114                 int nr_events;
 115                 int nr_groups;
 116         } table[] = {
 117                 {
 118                         .events = "{},",
 119                         .nr_events = 0,
 120                         .nr_groups = 0,
 121                 },
 122                 {
 123                         .events = "{instructions}",
 124                         .nr_events = 1,
 125                         .nr_groups = 1,
 126                 },
 127                 {
 128                         .events = "{instructions},{}",
 129                         .nr_events = 1,
 130                         .nr_groups = 1,
 131                 },
 132                 {
 133                         .events = "{},{instructions}",
 134                         .nr_events = 1,
 135                         .nr_groups = 1,
 136                 },
 137                 {
 138                         .events = "{instructions},{instructions}",
 139                         .nr_events = 2,
 140                         .nr_groups = 2,
 141                 },
 142                 {
 143                         .events = "{instructions,cycles},{instructions,cycles}",
 144                         .nr_events = 4,
 145                         .nr_groups = 2,
 146                 },
 147                 {
 148                         .events = "{stereolab}",
 149                         .nr_events = 0,
 150                         .nr_groups = 0,
 151                 },
 152                 {
 153                         .events =
 154                         "{instructions,cycles},{instructions,stereolab}",
 155                         .nr_events = 3,
 156                         .nr_groups = 1,
 157                 },
 158                 {
 159                         .events = "instructions}",
 160                         .nr_events = 1,
 161                         .nr_groups = 0,
 162                 },
 163                 {
 164                         .events = "{{instructions}}",
 165                         .nr_events = 0,
 166                         .nr_groups = 0,
 167                 },
 168         };
 169
 170         for (i = 0; i < ARRAY_SIZE(table); i++) {
 171                 evlist = evlist__new();
 172                 if (evlist == NULL)
 173                         return -ENOMEM;
 174
 175                 opt.value = evlist;
 176                 parse_libpfm_events_option(&opt,
 177                                         table[i].events,
 178                                         0);
 179                 TEST_ASSERT_EQUAL(table[i].events,
 180                                 count_pfm_events(&evlist->core),
 181                                 table[i].nr_events);
 182                 TEST_ASSERT_EQUAL(table[i].events,
 183                                 evlist->core.nr_groups,
 184                                 table[i].nr_groups);
 185
 186                 evlist__delete(evlist);
 187         }
 188         return 0;
 189 }
 190 #endif
 191
 192 const char *test__pfm_subtest_get_desc(int i)
 193 {
 194         if (i < 0 || i >= (int)ARRAY_SIZE(pfm_testcase_table))
 195                 return NULL;
 196         return pfm_testcase_table[i].desc;
 197 }
 198
 199 int test__pfm_subtest_get_nr(void)
 200 {
 201         return (int)ARRAY_SIZE(pfm_testcase_table);
 202 }
 203
 204 int test__pfm(struct test *test __maybe_unused, int i __maybe_unused)
 205 {
 206 #ifdef HAVE_LIBPFM
 207         if (i < 0 || i >= (int)ARRAY_SIZE(pfm_testcase_table))
 208                 return TEST_FAIL;
 209         return pfm_testcase_table[i].func();
 210 #else
 211         return TEST_SKIP;
 212 #endif
 213 }