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 "target.h" 13 #include <linux/err.h> 14 #include "dwarf-regs.h" 15 16 #define TEMPL "/tmp/perf-test-XXXXXX" 17 #define DATA_SIZE 10 18 19 static int get_temp(char *path) 20 { 21 int fd; 22 23 strcpy(path, TEMPL); 24 25 fd = mkstemp(path); 26 if (fd < 0) { 27 perror("mkstemp failed"); 28 return -1; 29 } 30 31 close(fd); 32 return 0; 33 } 34 35 static int session_write_header(char *path) 36 { 37 struct perf_session *session; 38 struct perf_data data = { 39 .path = path, 40 .mode = PERF_DATA_MODE_WRITE, 41 }; 42 struct target target = {}; 43 44 session = perf_session__new(&data, NULL); 45 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 46 47 session->evlist = evlist__new_default(&target, /*sample_callchains=*/false); 48 TEST_ASSERT_VAL("can't get evlist", session->evlist); 49 session->evlist->session = session; 50 51 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY); 52 perf_header__set_feat(&session->header, HEADER_NRCPUS); 53 perf_header__set_feat(&session->header, HEADER_ARCH); 54 55 session->header.data_size += DATA_SIZE; 56 57 TEST_ASSERT_VAL("failed to write header", 58 !perf_session__write_header(session, session->evlist, 59 perf_data__fd(&data), true)); 60 61 evlist__delete(session->evlist); 62 perf_session__delete(session); 63 64 return 0; 65 } 66 67 static int check_cpu_topology(char *path, struct perf_cpu_map *map) 68 { 69 struct perf_session *session; 70 struct perf_data data = { 71 .path = path, 72 .mode = PERF_DATA_MODE_READ, 73 }; 74 unsigned int i; 75 struct aggr_cpu_id id; 76 struct perf_cpu cpu; 77 struct perf_env *env; 78 uint16_t e_machine; 79 80 session = perf_session__new(&data, NULL); 81 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 82 env = perf_session__env(session); 83 cpu__setup_cpunode_map(); 84 85 /* On platforms with large numbers of CPUs process_cpu_topology() 86 * might issue an error while reading the perf.data file section 87 * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member 88 * cpu is a NULL pointer. 89 * Example: On s390 90 * CPU 0 is on core_id 0 and physical_package_id 6 91 * CPU 1 is on core_id 1 and physical_package_id 3 92 * 93 * Core_id and physical_package_id are platform and architecture 94 * dependent and might have higher numbers than the CPU id. 95 * This actually depends on the configuration. 96 * 97 * In this case process_cpu_topology() prints error message: 98 * "socket_id number is too big. You may need to upgrade the 99 * perf tool." 100 * 101 * This is the reason why this test might be skipped. aarch64 and 102 * s390 always write this part of the header, even when the above 103 * condition is true (see do_core_id_test in header.c). So always 104 * run this test on those platforms. 105 */ 106 e_machine = perf_env__e_machine(env, NULL); 107 108 if (!env->cpu && e_machine != EM_S390 && e_machine != EM_AARCH64) 109 return TEST_SKIP; 110 111 /* 112 * In powerpc pSeries platform, not all the topology information 113 * are exposed via sysfs. Due to restriction, detail like 114 * physical_package_id will be set to -1. Hence skip this 115 * test if physical_package_id returns -1 for cpu from perf_cpu_map. 116 */ 117 if (e_machine == EM_PPC64) { 118 if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1) 119 return TEST_SKIP; 120 } 121 122 TEST_ASSERT_VAL("Session header CPU map not set", env->cpu); 123 124 for (i = 0; i < (unsigned int)env->nr_cpus_avail; i++) { 125 cpu.cpu = i; 126 if (!perf_cpu_map__has(map, cpu)) 127 continue; 128 pr_debug("CPU %d, core %d, socket %d\n", i, 129 env->cpu[i].core_id, 130 env->cpu[i].socket_id); 131 } 132 133 // Test that CPU ID contains socket, die, core and CPU 134 perf_cpu_map__for_each_cpu(cpu, i, map) { 135 id = aggr_cpu_id__cpu(cpu, NULL); 136 TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match", 137 cpu.cpu == id.cpu.cpu); 138 139 TEST_ASSERT_VAL("Cpu map - Core ID doesn't match", 140 env->cpu[cpu.cpu].core_id == id.core); 141 TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match", 142 env->cpu[cpu.cpu].socket_id == id.socket); 143 144 TEST_ASSERT_VAL("Cpu map - Die ID doesn't match", 145 env->cpu[cpu.cpu].die_id == id.die); 146 TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1); 147 TEST_ASSERT_VAL("Cpu map - Thread IDX is set", id.thread_idx == -1); 148 } 149 150 // Test that core ID contains socket, die and core 151 perf_cpu_map__for_each_cpu(cpu, i, map) { 152 id = aggr_cpu_id__core(cpu, NULL); 153 TEST_ASSERT_VAL("Core map - Core ID doesn't match", 154 env->cpu[cpu.cpu].core_id == id.core); 155 156 TEST_ASSERT_VAL("Core map - Socket ID doesn't match", 157 env->cpu[cpu.cpu].socket_id == id.socket); 158 159 TEST_ASSERT_VAL("Core map - Die ID doesn't match", 160 env->cpu[cpu.cpu].die_id == id.die); 161 TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1); 162 TEST_ASSERT_VAL("Core map - Thread IDX is set", id.thread_idx == -1); 163 } 164 165 // Test that die ID contains socket and die 166 perf_cpu_map__for_each_cpu(cpu, i, map) { 167 id = aggr_cpu_id__die(cpu, NULL); 168 TEST_ASSERT_VAL("Die map - Socket ID doesn't match", 169 env->cpu[cpu.cpu].socket_id == id.socket); 170 171 TEST_ASSERT_VAL("Die map - Die ID doesn't match", 172 env->cpu[cpu.cpu].die_id == id.die); 173 174 TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1); 175 TEST_ASSERT_VAL("Die map - Core is set", id.core == -1); 176 TEST_ASSERT_VAL("Die map - CPU is set", id.cpu.cpu == -1); 177 TEST_ASSERT_VAL("Die map - Thread IDX is set", id.thread_idx == -1); 178 } 179 180 // Test that socket ID contains only socket 181 perf_cpu_map__for_each_cpu(cpu, i, map) { 182 id = aggr_cpu_id__socket(cpu, NULL); 183 TEST_ASSERT_VAL("Socket map - Socket ID doesn't match", 184 env->cpu[cpu.cpu].socket_id == id.socket); 185 186 TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1); 187 TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1); 188 TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1); 189 TEST_ASSERT_VAL("Socket map - CPU is set", id.cpu.cpu == -1); 190 TEST_ASSERT_VAL("Socket map - Thread IDX is set", id.thread_idx == -1); 191 } 192 193 // Test that node ID contains only node 194 perf_cpu_map__for_each_cpu(cpu, i, map) { 195 id = aggr_cpu_id__node(cpu, NULL); 196 TEST_ASSERT_VAL("Node map - Node ID doesn't match", 197 cpu__get_node(cpu) == id.node); 198 TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1); 199 TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1); 200 TEST_ASSERT_VAL("Node map - Core is set", id.core == -1); 201 TEST_ASSERT_VAL("Node map - CPU is set", id.cpu.cpu == -1); 202 TEST_ASSERT_VAL("Node map - Thread IDX is set", id.thread_idx == -1); 203 } 204 perf_session__delete(session); 205 206 return 0; 207 } 208 209 static int test__session_topology(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 210 { 211 char path[PATH_MAX]; 212 struct perf_cpu_map *map; 213 int ret = TEST_FAIL; 214 215 TEST_ASSERT_VAL("can't get templ file", !get_temp(path)); 216 217 pr_debug("templ file: %s\n", path); 218 219 if (session_write_header(path)) 220 goto free_path; 221 222 map = perf_cpu_map__new_online_cpus(); 223 if (map == NULL) { 224 pr_debug("failed to get system cpumap\n"); 225 goto free_path; 226 } 227 228 ret = check_cpu_topology(path, map); 229 perf_cpu_map__put(map); 230 231 free_path: 232 unlink(path); 233 return ret; 234 } 235 236 DEFINE_SUITE("Session topology", session_topology); 237