kernel/tools/perf/tests/hists_filter.c

   1 #include "perf.h"
   2 #include "util/debug.h"
   3 #include "util/symbol.h"
   4 #include "util/sort.h"
   5 #include "util/evsel.h"
   6 #include "util/evlist.h"
   7 #include "util/machine.h"
   8 #include "util/thread.h"
   9 #include "util/parse-events.h"
  10 #include "tests/tests.h"
  11 #include "tests/hists_common.h"
  12
  13 struct sample {
  14         u32 pid;
  15         u64 ip;
  16         struct thread *thread;
  17         struct map *map;
  18         struct symbol *sym;
  19 };
  20
  21 /* For the numbers, see hists_common.c */
  22 static struct sample fake_samples[] = {
  23         /* perf [kernel] schedule() */
  24         { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_KERNEL_SCHEDULE, },
  25         /* perf [perf]   main() */
  26         { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_PERF_MAIN, },
  27         /* perf [libc]   malloc() */
  28         { .pid = FAKE_PID_PERF1, .ip = FAKE_IP_LIBC_MALLOC, },
  29         /* perf [perf]   main() */
  30         { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_PERF_MAIN, }, /* will be merged */
  31         /* perf [perf]   cmd_record() */
  32         { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_PERF_CMD_RECORD, },
  33         /* perf [kernel] page_fault() */
  34         { .pid = FAKE_PID_PERF2, .ip = FAKE_IP_KERNEL_PAGE_FAULT, },
  35         /* bash [bash]   main() */
  36         { .pid = FAKE_PID_BASH,  .ip = FAKE_IP_BASH_MAIN, },
  37         /* bash [bash]   xmalloc() */
  38         { .pid = FAKE_PID_BASH,  .ip = FAKE_IP_BASH_XMALLOC, },
  39         /* bash [libc]   malloc() */
  40         { .pid = FAKE_PID_BASH,  .ip = FAKE_IP_LIBC_MALLOC, },
  41         /* bash [kernel] page_fault() */
  42         { .pid = FAKE_PID_BASH,  .ip = FAKE_IP_KERNEL_PAGE_FAULT, },
  43 };
  44
  45 static int add_hist_entries(struct perf_evlist *evlist,
  46                             struct machine *machine)
  47 {
  48         struct perf_evsel *evsel;
  49         struct addr_location al;
  50         struct perf_sample sample = { .period = 100, };
  51         size_t i;
  52
  53         /*
  54          * each evsel will have 10 samples but the 4th sample
  55          * (perf [perf] main) will be collapsed to an existing entry
  56          * so total 9 entries will be in the tree.
  57          */
  58         evlist__for_each(evlist, evsel) {
  59                 for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
  60                         const union perf_event event = {
  61                                 .header = {
  62                                         .misc = PERF_RECORD_MISC_USER,
  63                                 },
  64                         };
  65                         struct hist_entry_iter iter = {
  66                                 .ops = &hist_iter_normal,
  67                                 .hide_unresolved = false,
  68                         };
  69                         struct hists *hists = evsel__hists(evsel);
  70
  71                         /* make sure it has no filter at first */
  72                         hists->thread_filter = NULL;
  73                         hists->dso_filter = NULL;
  74                         hists->symbol_filter_str = NULL;
  75
  76                         sample.pid = fake_samples[i].pid;
  77                         sample.tid = fake_samples[i].pid;
  78                         sample.ip = fake_samples[i].ip;
  79
  80                         if (perf_event__preprocess_sample(&event, machine, &al,
  81                                                           &sample) < 0)
  82                                 goto out;
  83
  84                         if (hist_entry_iter__add(&iter, &al, evsel, &sample,
  85                                                  PERF_MAX_STACK_DEPTH, NULL) < 0)
  86                                 goto out;
  87
  88                         fake_samples[i].thread = al.thread;
  89                         fake_samples[i].map = al.map;
  90                         fake_samples[i].sym = al.sym;
  91                 }
  92         }
  93
  94         return 0;
  95
  96 out:
  97         pr_debug("Not enough memory for adding a hist entry\n");
  98         return TEST_FAIL;
  99 }
 100
 101 int test__hists_filter(void)
 102 {
 103         int err = TEST_FAIL;
 104         struct machines machines;
 105         struct machine *machine;
 106         struct perf_evsel *evsel;
 107         struct perf_evlist *evlist = perf_evlist__new();
 108
 109         TEST_ASSERT_VAL("No memory", evlist);
 110
 111         err = parse_events(evlist, "cpu-clock");
 112         if (err)
 113                 goto out;
 114         err = parse_events(evlist, "task-clock");
 115         if (err)
 116                 goto out;
 117
 118         /* default sort order (comm,dso,sym) will be used */
 119         if (setup_sorting() < 0)
 120                 goto out;
 121
 122         machines__init(&machines);
 123
 124         /* setup threads/dso/map/symbols also */
 125         machine = setup_fake_machine(&machines);
 126         if (!machine)
 127                 goto out;
 128
 129         if (verbose > 1)
 130                 machine__fprintf(machine, stderr);
 131
 132         /* process sample events */
 133         err = add_hist_entries(evlist, machine);
 134         if (err < 0)
 135                 goto out;
 136
 137         evlist__for_each(evlist, evsel) {
 138                 struct hists *hists = evsel__hists(evsel);
 139
 140                 hists__collapse_resort(hists, NULL);
 141                 hists__output_resort(hists, NULL);
 142
 143                 if (verbose > 2) {
 144                         pr_info("Normal histogram\n");
 145                         print_hists_out(hists);
 146                 }
 147
 148                 TEST_ASSERT_VAL("Invalid nr samples",
 149                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
 150                 TEST_ASSERT_VAL("Invalid nr hist entries",
 151                                 hists->nr_entries == 9);
 152                 TEST_ASSERT_VAL("Invalid total period",
 153                                 hists->stats.total_period == 1000);
 154                 TEST_ASSERT_VAL("Unmatched nr samples",
 155                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] ==
 156                                 hists->stats.nr_non_filtered_samples);
 157                 TEST_ASSERT_VAL("Unmatched nr hist entries",
 158                                 hists->nr_entries == hists->nr_non_filtered_entries);
 159                 TEST_ASSERT_VAL("Unmatched total period",
 160                                 hists->stats.total_period ==
 161                                 hists->stats.total_non_filtered_period);
 162
 163                 /* now applying thread filter for 'bash' */
 164                 hists->thread_filter = fake_samples[9].thread;
 165                 hists__filter_by_thread(hists);
 166
 167                 if (verbose > 2) {
 168                         pr_info("Histogram for thread filter\n");
 169                         print_hists_out(hists);
 170                 }
 171
 172                 /* normal stats should be invariant */
 173                 TEST_ASSERT_VAL("Invalid nr samples",
 174                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
 175                 TEST_ASSERT_VAL("Invalid nr hist entries",
 176                                 hists->nr_entries == 9);
 177                 TEST_ASSERT_VAL("Invalid total period",
 178                                 hists->stats.total_period == 1000);
 179
 180                 /* but filter stats are changed */
 181                 TEST_ASSERT_VAL("Unmatched nr samples for thread filter",
 182                                 hists->stats.nr_non_filtered_samples == 4);
 183                 TEST_ASSERT_VAL("Unmatched nr hist entries for thread filter",
 184                                 hists->nr_non_filtered_entries == 4);
 185                 TEST_ASSERT_VAL("Unmatched total period for thread filter",
 186                                 hists->stats.total_non_filtered_period == 400);
 187
 188                 /* remove thread filter first */
 189                 hists->thread_filter = NULL;
 190                 hists__filter_by_thread(hists);
 191
 192                 /* now applying dso filter for 'kernel' */
 193                 hists->dso_filter = fake_samples[0].map->dso;
 194                 hists__filter_by_dso(hists);
 195
 196                 if (verbose > 2) {
 197                         pr_info("Histogram for dso filter\n");
 198                         print_hists_out(hists);
 199                 }
 200
 201                 /* normal stats should be invariant */
 202                 TEST_ASSERT_VAL("Invalid nr samples",
 203                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
 204                 TEST_ASSERT_VAL("Invalid nr hist entries",
 205                                 hists->nr_entries == 9);
 206                 TEST_ASSERT_VAL("Invalid total period",
 207                                 hists->stats.total_period == 1000);
 208
 209                 /* but filter stats are changed */
 210                 TEST_ASSERT_VAL("Unmatched nr samples for dso filter",
 211                                 hists->stats.nr_non_filtered_samples == 3);
 212                 TEST_ASSERT_VAL("Unmatched nr hist entries for dso filter",
 213                                 hists->nr_non_filtered_entries == 3);
 214                 TEST_ASSERT_VAL("Unmatched total period for dso filter",
 215                                 hists->stats.total_non_filtered_period == 300);
 216
 217                 /* remove dso filter first */
 218                 hists->dso_filter = NULL;
 219                 hists__filter_by_dso(hists);
 220
 221                 /*
 222                  * now applying symbol filter for 'main'.  Also note that
 223                  * there's 3 samples that have 'main' symbol but the 4th
 224                  * entry of fake_samples was collapsed already so it won't
 225                  * be counted as a separate entry but the sample count and
 226                  * total period will be remained.
 227                  */
 228                 hists->symbol_filter_str = "main";
 229                 hists__filter_by_symbol(hists);
 230
 231                 if (verbose > 2) {
 232                         pr_info("Histogram for symbol filter\n");
 233                         print_hists_out(hists);
 234                 }
 235
 236                 /* normal stats should be invariant */
 237                 TEST_ASSERT_VAL("Invalid nr samples",
 238                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
 239                 TEST_ASSERT_VAL("Invalid nr hist entries",
 240                                 hists->nr_entries == 9);
 241                 TEST_ASSERT_VAL("Invalid total period",
 242                                 hists->stats.total_period == 1000);
 243
 244                 /* but filter stats are changed */
 245                 TEST_ASSERT_VAL("Unmatched nr samples for symbol filter",
 246                                 hists->stats.nr_non_filtered_samples == 3);
 247                 TEST_ASSERT_VAL("Unmatched nr hist entries for symbol filter",
 248                                 hists->nr_non_filtered_entries == 2);
 249                 TEST_ASSERT_VAL("Unmatched total period for symbol filter",
 250                                 hists->stats.total_non_filtered_period == 300);
 251
 252                 /* now applying all filters at once. */
 253                 hists->thread_filter = fake_samples[1].thread;
 254                 hists->dso_filter = fake_samples[1].map->dso;
 255                 hists__filter_by_thread(hists);
 256                 hists__filter_by_dso(hists);
 257
 258                 if (verbose > 2) {
 259                         pr_info("Histogram for all filters\n");
 260                         print_hists_out(hists);
 261                 }
 262
 263                 /* normal stats should be invariant */
 264                 TEST_ASSERT_VAL("Invalid nr samples",
 265                                 hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
 266                 TEST_ASSERT_VAL("Invalid nr hist entries",
 267                                 hists->nr_entries == 9);
 268                 TEST_ASSERT_VAL("Invalid total period",
 269                                 hists->stats.total_period == 1000);
 270
 271                 /* but filter stats are changed */
 272                 TEST_ASSERT_VAL("Unmatched nr samples for all filter",
 273                                 hists->stats.nr_non_filtered_samples == 2);
 274                 TEST_ASSERT_VAL("Unmatched nr hist entries for all filter",
 275                                 hists->nr_non_filtered_entries == 1);
 276                 TEST_ASSERT_VAL("Unmatched total period for all filter",
 277                                 hists->stats.total_non_filtered_period == 200);
 278         }
 279
 280
 281         err = TEST_OK;
 282
 283 out:
 284         /* tear down everything */
 285         perf_evlist__delete(evlist);
 286         reset_output_field();
 287         machines__exit(&machines);
 288
 289         return err;
 290 }