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 "pmus.h"
12 #include <linux/err.h>
13
14 #define TEMPL "/tmp/perf-test-XXXXXX"
15 #define DATA_SIZE 10
16
get_temp(char * path)17 static int get_temp(char *path)
18 {
19 int fd;
20
21 strcpy(path, TEMPL);
22
23 fd = mkstemp(path);
24 if (fd < 0) {
25 perror("mkstemp failed");
26 return -1;
27 }
28
29 close(fd);
30 return 0;
31 }
32
session_write_header(char * path)33 static int session_write_header(char *path)
34 {
35 struct perf_session *session;
36 struct perf_data data = {
37 .path = path,
38 .mode = PERF_DATA_MODE_WRITE,
39 };
40
41 session = perf_session__new(&data, NULL);
42 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
43
44 session->evlist = evlist__new_default();
45 TEST_ASSERT_VAL("can't get evlist", session->evlist);
46
47 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
48 perf_header__set_feat(&session->header, HEADER_NRCPUS);
49 perf_header__set_feat(&session->header, HEADER_ARCH);
50
51 session->header.data_size += DATA_SIZE;
52
53 TEST_ASSERT_VAL("failed to write header",
54 !perf_session__write_header(session, session->evlist, data.file.fd, true));
55
56 evlist__delete(session->evlist);
57 perf_session__delete(session);
58
59 return 0;
60 }
61
check_cpu_topology(char * path,struct perf_cpu_map * map)62 static int check_cpu_topology(char *path, struct perf_cpu_map *map)
63 {
64 struct perf_session *session;
65 struct perf_data data = {
66 .path = path,
67 .mode = PERF_DATA_MODE_READ,
68 };
69 int i;
70 struct aggr_cpu_id id;
71
72 session = perf_session__new(&data, NULL);
73 TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
74 cpu__setup_cpunode_map();
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 * dependent 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. aarch64 and
93 * s390 always write this part of the header, even when the above
94 * condition is true (see do_core_id_test in header.c). So always
95 * run this test on those platforms.
96 */
97 if (!session->header.env.cpu
98 && strncmp(session->header.env.arch, "s390", 4)
99 && strncmp(session->header.env.arch, "aarch64", 7))
100 return TEST_SKIP;
101
102 /*
103 * In powerpc pSeries platform, not all the topology information
104 * are exposed via sysfs. Due to restriction, detail like
105 * physical_package_id will be set to -1. Hence skip this
106 * test if physical_package_id returns -1 for cpu from perf_cpu_map.
107 */
108 if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
109 if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
110 return TEST_SKIP;
111 }
112
113 TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu);
114
115 for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
116 struct perf_cpu cpu = { .cpu = i };
117
118 if (!perf_cpu_map__has(map, cpu))
119 continue;
120 pr_debug("CPU %d, core %d, socket %d\n", i,
121 session->header.env.cpu[i].core_id,
122 session->header.env.cpu[i].socket_id);
123 }
124
125 // Test that CPU ID contains socket, die, core and CPU
126 for (i = 0; i < perf_cpu_map__nr(map); i++) {
127 id = aggr_cpu_id__cpu(perf_cpu_map__cpu(map, i), NULL);
128 TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match",
129 perf_cpu_map__cpu(map, i).cpu == id.cpu.cpu);
130
131 TEST_ASSERT_VAL("Cpu map - Core ID doesn't match",
132 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
133 TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match",
134 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
135 id.socket);
136
137 TEST_ASSERT_VAL("Cpu map - Die ID doesn't match",
138 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
139 TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1);
140 TEST_ASSERT_VAL("Cpu map - Thread IDX is set", id.thread_idx == -1);
141 }
142
143 // Test that core ID contains socket, die and core
144 for (i = 0; i < perf_cpu_map__nr(map); i++) {
145 id = aggr_cpu_id__core(perf_cpu_map__cpu(map, i), NULL);
146 TEST_ASSERT_VAL("Core map - Core ID doesn't match",
147 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
148
149 TEST_ASSERT_VAL("Core map - Socket ID doesn't match",
150 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
151 id.socket);
152
153 TEST_ASSERT_VAL("Core map - Die ID doesn't match",
154 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
155 TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1);
156 TEST_ASSERT_VAL("Core map - Thread IDX is set", id.thread_idx == -1);
157 }
158
159 // Test that die ID contains socket and die
160 for (i = 0; i < perf_cpu_map__nr(map); i++) {
161 id = aggr_cpu_id__die(perf_cpu_map__cpu(map, i), NULL);
162 TEST_ASSERT_VAL("Die map - Socket ID doesn't match",
163 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
164 id.socket);
165
166 TEST_ASSERT_VAL("Die map - Die ID doesn't match",
167 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
168
169 TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1);
170 TEST_ASSERT_VAL("Die map - Core is set", id.core == -1);
171 TEST_ASSERT_VAL("Die map - CPU is set", id.cpu.cpu == -1);
172 TEST_ASSERT_VAL("Die map - Thread IDX is set", id.thread_idx == -1);
173 }
174
175 // Test that socket ID contains only socket
176 for (i = 0; i < perf_cpu_map__nr(map); i++) {
177 id = aggr_cpu_id__socket(perf_cpu_map__cpu(map, i), NULL);
178 TEST_ASSERT_VAL("Socket map - Socket ID doesn't match",
179 session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
180 id.socket);
181
182 TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1);
183 TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1);
184 TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1);
185 TEST_ASSERT_VAL("Socket map - CPU is set", id.cpu.cpu == -1);
186 TEST_ASSERT_VAL("Socket map - Thread IDX is set", id.thread_idx == -1);
187 }
188
189 // Test that node ID contains only node
190 for (i = 0; i < perf_cpu_map__nr(map); i++) {
191 id = aggr_cpu_id__node(perf_cpu_map__cpu(map, i), NULL);
192 TEST_ASSERT_VAL("Node map - Node ID doesn't match",
193 cpu__get_node(perf_cpu_map__cpu(map, i)) == id.node);
194 TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1);
195 TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1);
196 TEST_ASSERT_VAL("Node map - Core is set", id.core == -1);
197 TEST_ASSERT_VAL("Node map - CPU is set", id.cpu.cpu == -1);
198 TEST_ASSERT_VAL("Node map - Thread IDX is set", id.thread_idx == -1);
199 }
200 perf_session__delete(session);
201
202 return 0;
203 }
204
test__session_topology(struct test_suite * test __maybe_unused,int subtest __maybe_unused)205 static int test__session_topology(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
206 {
207 char path[PATH_MAX];
208 struct perf_cpu_map *map;
209 int ret = TEST_FAIL;
210
211 TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
212
213 pr_debug("templ file: %s\n", path);
214
215 if (session_write_header(path))
216 goto free_path;
217
218 map = perf_cpu_map__new(NULL);
219 if (map == NULL) {
220 pr_debug("failed to get system cpumap\n");
221 goto free_path;
222 }
223
224 ret = check_cpu_topology(path, map);
225 perf_cpu_map__put(map);
226
227 free_path:
228 unlink(path);
229 return ret;
230 }
231
232 DEFINE_SUITE("Session topology", session_topology);
233
