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 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 59 static 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 } 114 115 int 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); 136 137 free_path: 138 unlink(path); 139 return ret; 140 } 141