1 // SPDX-License-Identifier: GPL-2.0
11 #define TEMPL "/tmp/perf-test-XXXXXX"
14 static int get_temp(char *path)
22 perror("mkstemp failed");
30 static int session_write_header(char *path)
32 struct perf_session *session;
33 struct perf_data_file file = {
35 .mode = PERF_DATA_MODE_WRITE,
38 session = perf_session__new(&file, false, NULL);
39 TEST_ASSERT_VAL("can't get session", session);
41 session->evlist = perf_evlist__new_default();
42 TEST_ASSERT_VAL("can't get evlist", session->evlist);
44 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
45 perf_header__set_feat(&session->header, HEADER_NRCPUS);
46 perf_header__set_feat(&session->header, HEADER_ARCH);
48 session->header.data_size += DATA_SIZE;
50 TEST_ASSERT_VAL("failed to write header",
51 !perf_session__write_header(session, session->evlist, file.fd, true));
53 perf_session__delete(session);
58 static int check_cpu_topology(char *path, struct cpu_map *map)
60 struct perf_session *session;
61 struct perf_data_file file = {
63 .mode = PERF_DATA_MODE_READ,
67 session = perf_session__new(&file, false, NULL);
68 TEST_ASSERT_VAL("can't get session", session);
70 /* On platforms with large numbers of CPUs process_cpu_topology()
71 * might issue an error while reading the perf.data file section
72 * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member
73 * cpu is a NULL pointer.
75 * CPU 0 is on core_id 0 and physical_package_id 6
76 * CPU 1 is on core_id 1 and physical_package_id 3
78 * Core_id and physical_package_id are platform and architecture
79 * dependend and might have higher numbers than the CPU id.
80 * This actually depends on the configuration.
82 * In this case process_cpu_topology() prints error message:
83 * "socket_id number is too big. You may need to upgrade the
86 * This is the reason why this test might be skipped.
88 if (!session->header.env.cpu)
91 for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
92 if (!cpu_map__has(map, i))
94 pr_debug("CPU %d, core %d, socket %d\n", i,
95 session->header.env.cpu[i].core_id,
96 session->header.env.cpu[i].socket_id);
99 for (i = 0; i < map->nr; i++) {
100 TEST_ASSERT_VAL("Core ID doesn't match",
101 (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
103 TEST_ASSERT_VAL("Socket ID doesn't match",
104 (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
107 perf_session__delete(session);
112 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
118 TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
120 pr_debug("templ file: %s\n", path);
122 if (session_write_header(path))
125 map = cpu_map__new(NULL);
127 pr_debug("failed to get system cpumap\n");
131 ret = check_cpu_topology(path, map);