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 .file = { 37 .path = path, 38 }, 39 .mode = PERF_DATA_MODE_WRITE, 40 }; 41 42 session = perf_session__new(&data, false, NULL); 43 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 44 45 session->evlist = perf_evlist__new_default(); 46 TEST_ASSERT_VAL("can't get evlist", session->evlist); 47 48 perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY); 49 perf_header__set_feat(&session->header, HEADER_NRCPUS); 50 perf_header__set_feat(&session->header, HEADER_ARCH); 51 52 session->header.data_size += DATA_SIZE; 53 54 TEST_ASSERT_VAL("failed to write header", 55 !perf_session__write_header(session, session->evlist, data.file.fd, true)); 56 57 perf_session__delete(session); 58 59 return 0; 60 } 61 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 .file = { 67 .path = path, 68 }, 69 .mode = PERF_DATA_MODE_READ, 70 }; 71 int i; 72 73 session = perf_session__new(&data, false, NULL); 74 TEST_ASSERT_VAL("can't get session", !IS_ERR(session)); 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 * dependend 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. 93 */ 94 if (!session->header.env.cpu) 95 return TEST_SKIP; 96 97 for (i = 0; i < session->header.env.nr_cpus_avail; i++) { 98 if (!cpu_map__has(map, i)) 99 continue; 100 pr_debug("CPU %d, core %d, socket %d\n", i, 101 session->header.env.cpu[i].core_id, 102 session->header.env.cpu[i].socket_id); 103 } 104 105 for (i = 0; i < map->nr; i++) { 106 TEST_ASSERT_VAL("Core ID doesn't match", 107 (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff))); 108 109 TEST_ASSERT_VAL("Socket ID doesn't match", 110 (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL))); 111 } 112 113 perf_session__delete(session); 114 115 return 0; 116 } 117 118 int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused) 119 { 120 char path[PATH_MAX]; 121 struct perf_cpu_map *map; 122 int ret = TEST_FAIL; 123 124 TEST_ASSERT_VAL("can't get templ file", !get_temp(path)); 125 126 pr_debug("templ file: %s\n", path); 127 128 if (session_write_header(path)) 129 goto free_path; 130 131 map = perf_cpu_map__new(NULL); 132 if (map == NULL) { 133 pr_debug("failed to get system cpumap\n"); 134 goto free_path; 135 } 136 137 ret = check_cpu_topology(path, map); 138 perf_cpu_map__put(map); 139 140 free_path: 141 unlink(path); 142 return ret; 143 } 144