tools/perf/tests/topology.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <string.h>
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include "tests.h"
   6 #include "util.h"
   7 #include "session.h"
   8 #include "evlist.h"
   9 #include "debug.h"
  10
  11 #define TEMPL "/tmp/perf-test-XXXXXX"
  12 #define DATA_SIZE       10
  13
  14 static int get_temp(char *path)
  15 {
  16         int fd;
  17
  18         strcpy(path, TEMPL);
  19
  20         fd = mkstemp(path);
  21         if (fd < 0) {
  22                 perror("mkstemp failed");
  23                 return -1;
  24         }
  25
  26         close(fd);
  27         return 0;
  28 }
  29
  30 static int session_write_header(char *path)
  31 {
  32         struct perf_session *session;
  33         struct perf_data_file file = {
  34                 .path = path,
  35                 .mode = PERF_DATA_MODE_WRITE,
  36         };
  37
  38         session = perf_session__new(&file, false, NULL);
  39         TEST_ASSERT_VAL("can't get session", session);
  40
  41         session->evlist = perf_evlist__new_default();
  42         TEST_ASSERT_VAL("can't get evlist", session->evlist);
  43
  44         perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
  45         perf_header__set_feat(&session->header, HEADER_NRCPUS);
  46
  47         session->header.data_size += DATA_SIZE;
  48
  49         TEST_ASSERT_VAL("failed to write header",
  50                         !perf_session__write_header(session, session->evlist, file.fd, true));
  51
  52         perf_session__delete(session);
  53
  54         return 0;
  55 }
  56
  57 static int check_cpu_topology(char *path, struct cpu_map *map)
  58 {
  59         struct perf_session *session;
  60         struct perf_data_file file = {
  61                 .path = path,
  62                 .mode = PERF_DATA_MODE_READ,
  63         };
  64         int i;
  65
  66         session = perf_session__new(&file, false, NULL);
  67         TEST_ASSERT_VAL("can't get session", session);
  68
  69         for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
  70                 if (!cpu_map__has(map, i))
  71                         continue;
  72                 pr_debug("CPU %d, core %d, socket %d\n", i,
  73                          session->header.env.cpu[i].core_id,
  74                          session->header.env.cpu[i].socket_id);
  75         }
  76
  77         for (i = 0; i < map->nr; i++) {
  78                 TEST_ASSERT_VAL("Core ID doesn't match",
  79                         (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
  80
  81                 TEST_ASSERT_VAL("Socket ID doesn't match",
  82                         (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
  83         }
  84
  85         perf_session__delete(session);
  86
  87         return 0;
  88 }
  89
  90 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
  91 {
  92         char path[PATH_MAX];
  93         struct cpu_map *map;
  94         int ret = -1;
  95
  96         TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
  97
  98         pr_debug("templ file: %s\n", path);
  99
 100         if (session_write_header(path))
 101                 goto free_path;
 102
 103         map = cpu_map__new(NULL);
 104         if (map == NULL) {
 105                 pr_debug("failed to get system cpumap\n");
 106                 goto free_path;
 107         }
 108
 109         if (check_cpu_topology(path, map))
 110                 goto free_map;
 111         ret = 0;
 112
 113 free_map:
 114         cpu_map__put(map);
 115 free_path:
 116         unlink(path);
 117         return ret;
 118 }