tools/perf/tests/topology.c

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