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 "pmus.h"
  12 #include <linux/err.h>
  13
  14 #define TEMPL "/tmp/perf-test-XXXXXX"
  15 #define DATA_SIZE       10
  16
  17 static int get_temp(char *path)
  18 {
  19         int fd;
  20
  21         strcpy(path, TEMPL);
  22
  23         fd = mkstemp(path);
  24         if (fd < 0) {
  25                 perror("mkstemp failed");
  26                 return -1;
  27         }
  28
  29         close(fd);
  30         return 0;
  31 }
  32
  33 static int session_write_header(char *path)
  34 {
  35         struct perf_session *session;
  36         struct perf_data data = {
  37                 .path = path,
  38                 .mode = PERF_DATA_MODE_WRITE,
  39         };
  40
  41         session = perf_session__new(&data, NULL);
  42         TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
  43
  44         session->evlist = evlist__new_default();
  45         TEST_ASSERT_VAL("can't get evlist", session->evlist);
  46
  47         perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
  48         perf_header__set_feat(&session->header, HEADER_NRCPUS);
  49         perf_header__set_feat(&session->header, HEADER_ARCH);
  50
  51         session->header.data_size += DATA_SIZE;
  52
  53         TEST_ASSERT_VAL("failed to write header",
  54                         !perf_session__write_header(session, session->evlist, data.file.fd, true));
  55
  56         evlist__delete(session->evlist);
  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                 .path = path,
  67                 .mode = PERF_DATA_MODE_READ,
  68         };
  69         int i;
  70         struct aggr_cpu_id id;
  71
  72         session = perf_session__new(&data, NULL);
  73         TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
  74         cpu__setup_cpunode_map();
  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          *   dependent 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. aarch64 and
  93          *  s390 always write this part of the header, even when the above
  94          *  condition is true (see do_core_id_test in header.c). So always
  95          *  run this test on those platforms.
  96          */
  97         if (!session->header.env.cpu
  98                         && strncmp(session->header.env.arch, "s390", 4)
  99                         && strncmp(session->header.env.arch, "aarch64", 7))
 100                 return TEST_SKIP;
 101
 102         /*
 103          * In powerpc pSeries platform, not all the topology information
 104          * are exposed via sysfs. Due to restriction, detail like
 105          * physical_package_id will be set to -1. Hence skip this
 106          * test if physical_package_id returns -1 for cpu from perf_cpu_map.
 107          */
 108         if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
 109                 if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
 110                         return TEST_SKIP;
 111         }
 112
 113         TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu);
 114
 115         for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
 116                 struct perf_cpu cpu = { .cpu = i };
 117
 118                 if (!perf_cpu_map__has(map, cpu))
 119                         continue;
 120                 pr_debug("CPU %d, core %d, socket %d\n", i,
 121                          session->header.env.cpu[i].core_id,
 122                          session->header.env.cpu[i].socket_id);
 123         }
 124
 125         // Test that CPU ID contains socket, die, core and CPU
 126         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 127                 id = aggr_cpu_id__cpu(perf_cpu_map__cpu(map, i), NULL);
 128                 TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match",
 129                                 perf_cpu_map__cpu(map, i).cpu == id.cpu.cpu);
 130
 131                 TEST_ASSERT_VAL("Cpu map - Core ID doesn't match",
 132                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
 133                 TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match",
 134                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 135                         id.socket);
 136
 137                 TEST_ASSERT_VAL("Cpu map - Die ID doesn't match",
 138                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 139                 TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1);
 140                 TEST_ASSERT_VAL("Cpu map - Thread IDX is set", id.thread_idx == -1);
 141         }
 142
 143         // Test that core ID contains socket, die and core
 144         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 145                 id = aggr_cpu_id__core(perf_cpu_map__cpu(map, i), NULL);
 146                 TEST_ASSERT_VAL("Core map - Core ID doesn't match",
 147                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
 148
 149                 TEST_ASSERT_VAL("Core map - Socket ID doesn't match",
 150                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 151                         id.socket);
 152
 153                 TEST_ASSERT_VAL("Core map - Die ID doesn't match",
 154                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 155                 TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1);
 156                 TEST_ASSERT_VAL("Core map - Thread IDX is set", id.thread_idx == -1);
 157         }
 158
 159         // Test that die ID contains socket and die
 160         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 161                 id = aggr_cpu_id__die(perf_cpu_map__cpu(map, i), NULL);
 162                 TEST_ASSERT_VAL("Die map - Socket ID doesn't match",
 163                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 164                         id.socket);
 165
 166                 TEST_ASSERT_VAL("Die map - Die ID doesn't match",
 167                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 168
 169                 TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1);
 170                 TEST_ASSERT_VAL("Die map - Core is set", id.core == -1);
 171                 TEST_ASSERT_VAL("Die map - CPU is set", id.cpu.cpu == -1);
 172                 TEST_ASSERT_VAL("Die map - Thread IDX is set", id.thread_idx == -1);
 173         }
 174
 175         // Test that socket ID contains only socket
 176         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 177                 id = aggr_cpu_id__socket(perf_cpu_map__cpu(map, i), NULL);
 178                 TEST_ASSERT_VAL("Socket map - Socket ID doesn't match",
 179                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 180                         id.socket);
 181
 182                 TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1);
 183                 TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1);
 184                 TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1);
 185                 TEST_ASSERT_VAL("Socket map - CPU is set", id.cpu.cpu == -1);
 186                 TEST_ASSERT_VAL("Socket map - Thread IDX is set", id.thread_idx == -1);
 187         }
 188
 189         // Test that node ID contains only node
 190         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 191                 id = aggr_cpu_id__node(perf_cpu_map__cpu(map, i), NULL);
 192                 TEST_ASSERT_VAL("Node map - Node ID doesn't match",
 193                                 cpu__get_node(perf_cpu_map__cpu(map, i)) == id.node);
 194                 TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1);
 195                 TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1);
 196                 TEST_ASSERT_VAL("Node map - Core is set", id.core == -1);
 197                 TEST_ASSERT_VAL("Node map - CPU is set", id.cpu.cpu == -1);
 198                 TEST_ASSERT_VAL("Node map - Thread IDX is set", id.thread_idx == -1);
 199         }
 200         perf_session__delete(session);
 201
 202         return 0;
 203 }
 204
 205 static int test__session_topology(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 206 {
 207         char path[PATH_MAX];
 208         struct perf_cpu_map *map;
 209         int ret = TEST_FAIL;
 210
 211         TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
 212
 213         pr_debug("templ file: %s\n", path);
 214
 215         if (session_write_header(path))
 216                 goto free_path;
 217
 218         map = perf_cpu_map__new_online_cpus();
 219         if (map == NULL) {
 220                 pr_debug("failed to get system cpumap\n");
 221                 goto free_path;
 222         }
 223
 224         ret = check_cpu_topology(path, map);
 225         perf_cpu_map__put(map);
 226
 227 free_path:
 228         unlink(path);
 229         return ret;
 230 }
 231
 232 DEFINE_SUITE("Session topology", session_topology);