tools/perf/tests/topology.c

   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 }