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1// SPDX-License-Identifier: GPL-2.0
2#include <string.h>
3#include <stdlib.h>
4#include <stdio.h>
5#include <perf/cpumap.h>
6#include "cpumap.h"
7#include "tests.h"
8#include "session.h"
9#include "evlist.h"
10#include "debug.h"
11#include <linux/err.h>
12
13#define TEMPL "/tmp/perf-test-XXXXXX"
14#define DATA_SIZE 10
15
16static int get_temp(char *path)
17{
18 int fd;
19
20 strcpy(path, TEMPL);
21
22 fd = mkstemp(path);
23 if (fd < 0) {
24 perror("mkstemp failed");
25 return -1;
26 }
27
28 close(fd);
29 return 0;
30}
31
32static int session_write_header(char *path)
33{
34 struct perf_session *session;
35 struct perf_data data = {
36 .file = {
37 .path = path,
38 },
39 .mode = PERF_DATA_MODE_WRITE,
40 };
41
42 session = perf_session__new(&data, false, NULL);
43 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
44
45 session->evlist = perf_evlist__new_default();
46 TEST_ASSERT_VAL("can't get evlist", session->evlist);
47
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);
51
52 session->header.data_size += DATA_SIZE;
53
54 TEST_ASSERT_VAL("failed to write header",
55 !perf_session__write_header(session, session->evlist, data.file.fd, true));
56
57 perf_session__delete(session);
58
59 return 0;
60}
61
62static int check_cpu_topology(char *path, struct perf_cpu_map *map)
63{
64 struct perf_session *session;
65 struct perf_data data = {
66 .file = {
67 .path = path,
68 },
69 .mode = PERF_DATA_MODE_READ,
70 };
71 int i;
72
73 session = perf_session__new(&data, false, NULL);
74 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
75
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.
80 * Example: On s390
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
83 *
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.
87 *
88 * In this case process_cpu_topology() prints error message:
89 * "socket_id number is too big. You may need to upgrade the
90 * perf tool."
91 *
92 * This is the reason why this test might be skipped.
93 */
94 if (!session->header.env.cpu)
95 return TEST_SKIP;
96
97 for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
98 if (!cpu_map__has(map, i))
99 continue;
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);
103 }
104
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)));
108
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)));
111 }
112
113 perf_session__delete(session);
114
115 return 0;
116}
117
118int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
119{
120 char path[PATH_MAX];
121 struct perf_cpu_map *map;
122 int ret = TEST_FAIL;
123
124 TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
125
126 pr_debug("templ file: %s\n", path);
127
128 if (session_write_header(path))
129 goto free_path;
130
131 map = perf_cpu_map__new(NULL);
132 if (map == NULL) {
133 pr_debug("failed to get system cpumap\n");
134 goto free_path;
135 }
136
137 ret = check_cpu_topology(path, map);
138 perf_cpu_map__put(map);
139
140free_path:
141 unlink(path);
142 return ret;
143}
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
14static 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
30static int session_write_header(char *path)
31{
32 struct perf_session *session;
33 struct perf_data data = {
34 .file = {
35 .path = path,
36 },
37 .mode = PERF_DATA_MODE_WRITE,
38 };
39
40 session = perf_session__new(&data, false, NULL);
41 TEST_ASSERT_VAL("can't get session", session);
42
43 session->evlist = perf_evlist__new_default();
44 TEST_ASSERT_VAL("can't get evlist", session->evlist);
45
46 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
47 perf_header__set_feat(&session->header, HEADER_NRCPUS);
48
49 session->header.data_size += DATA_SIZE;
50
51 TEST_ASSERT_VAL("failed to write header",
52 !perf_session__write_header(session, session->evlist, data.file.fd, true));
53
54 perf_session__delete(session);
55
56 return 0;
57}
58
59static int check_cpu_topology(char *path, struct cpu_map *map)
60{
61 struct perf_session *session;
62 struct perf_data data = {
63 .file = {
64 .path = path,
65 },
66 .mode = PERF_DATA_MODE_READ,
67 };
68 int i;
69
70 session = perf_session__new(&data, false, NULL);
71 TEST_ASSERT_VAL("can't get session", session);
72
73 /* On platforms with large numbers of CPUs process_cpu_topology()
74 * might issue an error while reading the perf.data file section
75 * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member
76 * cpu is a NULL pointer.
77 * Example: On s390
78 * CPU 0 is on core_id 0 and physical_package_id 6
79 * CPU 1 is on core_id 1 and physical_package_id 3
80 *
81 * Core_id and physical_package_id are platform and architecture
82 * dependend and might have higher numbers than the CPU id.
83 * This actually depends on the configuration.
84 *
85 * In this case process_cpu_topology() prints error message:
86 * "socket_id number is too big. You may need to upgrade the
87 * perf tool."
88 *
89 * This is the reason why this test might be skipped.
90 */
91 if (!session->header.env.cpu)
92 return TEST_SKIP;
93
94 for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
95 if (!cpu_map__has(map, i))
96 continue;
97 pr_debug("CPU %d, core %d, socket %d\n", i,
98 session->header.env.cpu[i].core_id,
99 session->header.env.cpu[i].socket_id);
100 }
101
102 for (i = 0; i < map->nr; i++) {
103 TEST_ASSERT_VAL("Core ID doesn't match",
104 (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
105
106 TEST_ASSERT_VAL("Socket ID doesn't match",
107 (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
108 }
109
110 perf_session__delete(session);
111
112 return 0;
113}
114
115int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
116{
117 char path[PATH_MAX];
118 struct cpu_map *map;
119 int ret = TEST_FAIL;
120
121 TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
122
123 pr_debug("templ file: %s\n", path);
124
125 if (session_write_header(path))
126 goto free_path;
127
128 map = cpu_map__new(NULL);
129 if (map == NULL) {
130 pr_debug("failed to get system cpumap\n");
131 goto free_path;
132 }
133
134 ret = check_cpu_topology(path, map);
135 cpu_map__put(map);
136
137free_path:
138 unlink(path);
139 return ret;
140}