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 16 static 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 32 static int session_write_header(char *path) 33 { 34 struct perf_session *session; 35 struct perf_data data = { 36 .path = path, 37 .mode = PERF_DATA_MODE_WRITE, 38 }; 39 40 session = perf_session__new(&data, false, NULL); 41 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 42 43 session->evlist = 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 perf_header__set_feat(&session->header, HEADER_ARCH); 49 50 session->header.data_size += DATA_SIZE; 51 52 TEST_ASSERT_VAL("failed to write header", 53 !perf_session__write_header(session, session->evlist, data.file.fd, true)); 54 55 perf_session__delete(session); 56 57 return 0; 58 } 59 60 static int check_cpu_topology(char *path, struct perf_cpu_map *map) 61 { 62 struct perf_session *session; 63 struct perf_data data = { 64 .path = path, 65 .mode = PERF_DATA_MODE_READ, 66 }; 67 int i; 68 struct aggr_cpu_id id; 69 70 session = perf_session__new(&data, false, NULL); 71 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 72 cpu__setup_cpunode_map(); 73 74 /* On platforms with large numbers of CPUs process_cpu_topology() 75 * might issue an error while reading the perf.data file section 76 * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member 77 * cpu is a NULL pointer. 78 * Example: On s390 79 * CPU 0 is on core_id 0 and physical_package_id 6 80 * CPU 1 is on core_id 1 and physical_package_id 3 81 * 82 * Core_id and physical_package_id are platform and architecture 83 * dependend and might have higher numbers than the CPU id. 84 * This actually depends on the configuration. 85 * 86 * In this case process_cpu_topology() prints error message: 87 * "socket_id number is too big. You may need to upgrade the 88 * perf tool." 89 * 90 * This is the reason why this test might be skipped. aarch64 and 91 * s390 always write this part of the header, even when the above 92 * condition is true (see do_core_id_test in header.c). So always 93 * run this test on those platforms. 94 */ 95 if (!session->header.env.cpu 96 && strncmp(session->header.env.arch, "s390", 4) 97 && strncmp(session->header.env.arch, "aarch64", 7)) 98 return TEST_SKIP; 99 100 TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu); 101 102 for (i = 0; i < session->header.env.nr_cpus_avail; i++) { 103 if (!cpu_map__has(map, i)) 104 continue; 105 pr_debug("CPU %d, core %d, socket %d\n", i, 106 session->header.env.cpu[i].core_id, 107 session->header.env.cpu[i].socket_id); 108 } 109 110 // Test that core ID contains socket, die and core 111 for (i = 0; i < map->nr; i++) { 112 id = cpu_map__get_core(map, i, NULL); 113 TEST_ASSERT_VAL("Core map - Core ID doesn't match", 114 session->header.env.cpu[map->map[i]].core_id == id.core); 115 116 TEST_ASSERT_VAL("Core map - Socket ID doesn't match", 117 session->header.env.cpu[map->map[i]].socket_id == id.socket); 118 119 TEST_ASSERT_VAL("Core map - Die ID doesn't match", 120 session->header.env.cpu[map->map[i]].die_id == id.die); 121 TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1); 122 TEST_ASSERT_VAL("Core map - Thread is set", id.thread == -1); 123 } 124 125 // Test that die ID contains socket and die 126 for (i = 0; i < map->nr; i++) { 127 id = cpu_map__get_die(map, i, NULL); 128 TEST_ASSERT_VAL("Die map - Socket ID doesn't match", 129 session->header.env.cpu[map->map[i]].socket_id == id.socket); 130 131 TEST_ASSERT_VAL("Die map - Die ID doesn't match", 132 session->header.env.cpu[map->map[i]].die_id == id.die); 133 134 TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1); 135 TEST_ASSERT_VAL("Die map - Core is set", id.core == -1); 136 TEST_ASSERT_VAL("Die map - Thread is set", id.thread == -1); 137 } 138 139 // Test that socket ID contains only socket 140 for (i = 0; i < map->nr; i++) { 141 id = cpu_map__get_socket(map, i, NULL); 142 TEST_ASSERT_VAL("Socket map - Socket ID doesn't match", 143 session->header.env.cpu[map->map[i]].socket_id == id.socket); 144 145 TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1); 146 TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1); 147 TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1); 148 TEST_ASSERT_VAL("Socket map - Thread is set", id.thread == -1); 149 } 150 151 // Test that node ID contains only node 152 for (i = 0; i < map->nr; i++) { 153 id = cpu_map__get_node(map, i, NULL); 154 TEST_ASSERT_VAL("Node map - Node ID doesn't match", 155 cpu__get_node(map->map[i]) == id.node); 156 TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1); 157 TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1); 158 TEST_ASSERT_VAL("Node map - Core is set", id.core == -1); 159 TEST_ASSERT_VAL("Node map - Thread is set", id.thread == -1); 160 } 161 perf_session__delete(session); 162 163 return 0; 164 } 165 166 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused) 167 { 168 char path[PATH_MAX]; 169 struct perf_cpu_map *map; 170 int ret = TEST_FAIL; 171 172 TEST_ASSERT_VAL("can't get templ file", !get_temp(path)); 173 174 pr_debug("templ file: %s\n", path); 175 176 if (session_write_header(path)) 177 goto free_path; 178 179 map = perf_cpu_map__new(NULL); 180 if (map == NULL) { 181 pr_debug("failed to get system cpumap\n"); 182 goto free_path; 183 } 184 185 ret = check_cpu_topology(path, map); 186 perf_cpu_map__put(map); 187 188 free_path: 189 unlink(path); 190 return ret; 191 } 192