xref: /openbmc/linux/tools/perf/tests/topology.c (revision 6aa7de05)
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_avail; i++) {
69 		if (!cpu_map__has(map, i))
70 			continue;
71 		pr_debug("CPU %d, core %d, socket %d\n", i,
72 			 session->header.env.cpu[i].core_id,
73 			 session->header.env.cpu[i].socket_id);
74 	}
75 
76 	for (i = 0; i < map->nr; i++) {
77 		TEST_ASSERT_VAL("Core ID doesn't match",
78 			(session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
79 
80 		TEST_ASSERT_VAL("Socket ID doesn't match",
81 			(session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
82 	}
83 
84 	perf_session__delete(session);
85 
86 	return 0;
87 }
88 
89 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
90 {
91 	char path[PATH_MAX];
92 	struct cpu_map *map;
93 	int ret = -1;
94 
95 	TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
96 
97 	pr_debug("templ file: %s\n", path);
98 
99 	if (session_write_header(path))
100 		goto free_path;
101 
102 	map = cpu_map__new(NULL);
103 	if (map == NULL) {
104 		pr_debug("failed to get system cpumap\n");
105 		goto free_path;
106 	}
107 
108 	if (check_cpu_topology(path, map))
109 		goto free_map;
110 	ret = 0;
111 
112 free_map:
113 	cpu_map__put(map);
114 free_path:
115 	unlink(path);
116 	return ret;
117 }
118