1 // SPDX-License-Identifier: GPL-2.0
5 #include <perf/cpumap.h>
11 #include <linux/err.h>
13 #define TEMPL "/tmp/perf-test-XXXXXX"
16 static int get_temp(char *path)
24 perror("mkstemp failed");
32 static int session_write_header(char *path)
34 struct perf_session *session;
35 struct perf_data data = {
39 .mode = PERF_DATA_MODE_WRITE,
42 session = perf_session__new(&data, false, NULL);
43 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
45 session->evlist = perf_evlist__new_default();
46 TEST_ASSERT_VAL("can't get evlist", session->evlist);
48 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
49 perf_header__set_feat(&session->header, HEADER_NRCPUS);
50 perf_header__set_feat(&session->header, HEADER_ARCH);
52 session->header.data_size += DATA_SIZE;
54 TEST_ASSERT_VAL("failed to write header",
55 !perf_session__write_header(session, session->evlist, data.file.fd, true));
57 perf_session__delete(session);
62 static int check_cpu_topology(char *path, struct perf_cpu_map *map)
64 struct perf_session *session;
65 struct perf_data data = {
69 .mode = PERF_DATA_MODE_READ,
73 session = perf_session__new(&data, false, NULL);
74 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
76 /* On platforms with large numbers of CPUs process_cpu_topology()
77 * might issue an error while reading the perf.data file section
78 * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member
79 * cpu is a NULL pointer.
81 * CPU 0 is on core_id 0 and physical_package_id 6
82 * CPU 1 is on core_id 1 and physical_package_id 3
84 * Core_id and physical_package_id are platform and architecture
85 * dependend and might have higher numbers than the CPU id.
86 * This actually depends on the configuration.
88 * In this case process_cpu_topology() prints error message:
89 * "socket_id number is too big. You may need to upgrade the
92 * This is the reason why this test might be skipped.
94 if (!session->header.env.cpu)
97 for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
98 if (!cpu_map__has(map, i))
100 pr_debug("CPU %d, core %d, socket %d\n", i,
101 session->header.env.cpu[i].core_id,
102 session->header.env.cpu[i].socket_id);
105 for (i = 0; i < map->nr; i++) {
106 TEST_ASSERT_VAL("Core ID doesn't match",
107 (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
109 TEST_ASSERT_VAL("Socket ID doesn't match",
110 (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
113 perf_session__delete(session);
118 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
121 struct perf_cpu_map *map;
124 TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
126 pr_debug("templ file: %s\n", path);
128 if (session_write_header(path))
131 map = perf_cpu_map__new(NULL);
133 pr_debug("failed to get system cpumap\n");
137 ret = check_cpu_topology(path, map);
138 perf_cpu_map__put(map);