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 14 static 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 30 static 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 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 cpu_map *map) 61 { 62 struct perf_session *session; 63 struct perf_data data = { 64 .file = { 65 .path = path, 66 }, 67 .mode = PERF_DATA_MODE_READ, 68 }; 69 int i; 70 71 session = perf_session__new(&data, false, NULL); 72 TEST_ASSERT_VAL("can't get session", session); 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. 91 */ 92 if (!session->header.env.cpu) 93 return TEST_SKIP; 94 95 for (i = 0; i < session->header.env.nr_cpus_avail; i++) { 96 if (!cpu_map__has(map, i)) 97 continue; 98 pr_debug("CPU %d, core %d, socket %d\n", i, 99 session->header.env.cpu[i].core_id, 100 session->header.env.cpu[i].socket_id); 101 } 102 103 for (i = 0; i < map->nr; i++) { 104 TEST_ASSERT_VAL("Core ID doesn't match", 105 (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff))); 106 107 TEST_ASSERT_VAL("Socket ID doesn't match", 108 (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL))); 109 } 110 111 perf_session__delete(session); 112 113 return 0; 114 } 115 116 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused) 117 { 118 char path[PATH_MAX]; 119 struct cpu_map *map; 120 int ret = TEST_FAIL; 121 122 TEST_ASSERT_VAL("can't get templ file", !get_temp(path)); 123 124 pr_debug("templ file: %s\n", path); 125 126 if (session_write_header(path)) 127 goto free_path; 128 129 map = cpu_map__new(NULL); 130 if (map == NULL) { 131 pr_debug("failed to get system cpumap\n"); 132 goto free_path; 133 } 134 135 ret = check_cpu_topology(path, map); 136 cpu_map__put(map); 137 138 free_path: 139 unlink(path); 140 return ret; 141 } 142