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 "pmu.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         if (!perf_pmu__has_hybrid()) {
  45                 session->evlist = evlist__new_default();
  46                 TEST_ASSERT_VAL("can't get evlist", session->evlist);
  47         } else {
  48                 struct parse_events_error err;
  49
  50                 session->evlist = evlist__new();
  51                 TEST_ASSERT_VAL("can't get evlist", session->evlist);
  52                 parse_events_error__init(&err);
  53                 parse_events(session->evlist, "cpu_core/cycles/", &err);
  54                 parse_events_error__exit(&err);
  55         }
  56
  57         perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
  58         perf_header__set_feat(&session->header, HEADER_NRCPUS);
  59         perf_header__set_feat(&session->header, HEADER_ARCH);
  60
  61         session->header.data_size += DATA_SIZE;
  62
  63         TEST_ASSERT_VAL("failed to write header",
  64                         !perf_session__write_header(session, session->evlist, data.file.fd, true));
  65
  66         evlist__delete(session->evlist);
  67         perf_session__delete(session);
  68
  69         return 0;
  70 }
  71
  72 static int check_cpu_topology(char *path, struct perf_cpu_map *map)
  73 {
  74         struct perf_session *session;
  75         struct perf_data data = {
  76                 .path = path,
  77                 .mode = PERF_DATA_MODE_READ,
  78         };
  79         int i;
  80         struct aggr_cpu_id id;
  81
  82         session = perf_session__new(&data, NULL);
  83         TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
  84         cpu__setup_cpunode_map();
  85
  86         /* On platforms with large numbers of CPUs process_cpu_topology()
  87          * might issue an error while reading the perf.data file section
  88          * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member
  89          * cpu is a NULL pointer.
  90          * Example: On s390
  91          *   CPU 0 is on core_id 0 and physical_package_id 6
  92          *   CPU 1 is on core_id 1 and physical_package_id 3
  93          *
  94          *   Core_id and physical_package_id are platform and architecture
  95          *   dependent and might have higher numbers than the CPU id.
  96          *   This actually depends on the configuration.
  97          *
  98          *  In this case process_cpu_topology() prints error message:
  99          *  "socket_id number is too big. You may need to upgrade the
 100          *  perf tool."
 101          *
 102          *  This is the reason why this test might be skipped. aarch64 and
 103          *  s390 always write this part of the header, even when the above
 104          *  condition is true (see do_core_id_test in header.c). So always
 105          *  run this test on those platforms.
 106          */
 107         if (!session->header.env.cpu
 108                         && strncmp(session->header.env.arch, "s390", 4)
 109                         && strncmp(session->header.env.arch, "aarch64", 7))
 110                 return TEST_SKIP;
 111
 112         /*
 113          * In powerpc pSeries platform, not all the topology information
 114          * are exposed via sysfs. Due to restriction, detail like
 115          * physical_package_id will be set to -1. Hence skip this
 116          * test if physical_package_id returns -1 for cpu from perf_cpu_map.
 117          */
 118         if (!strncmp(session->header.env.arch, "ppc64le", 7)) {
 119                 if (cpu__get_socket_id(perf_cpu_map__cpu(map, 0)) == -1)
 120                         return TEST_SKIP;
 121         }
 122
 123         TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu);
 124
 125         for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
 126                 struct perf_cpu cpu = { .cpu = i };
 127
 128                 if (!perf_cpu_map__has(map, cpu))
 129                         continue;
 130                 pr_debug("CPU %d, core %d, socket %d\n", i,
 131                          session->header.env.cpu[i].core_id,
 132                          session->header.env.cpu[i].socket_id);
 133         }
 134
 135         // Test that CPU ID contains socket, die, core and CPU
 136         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 137                 id = aggr_cpu_id__cpu(perf_cpu_map__cpu(map, i), NULL);
 138                 TEST_ASSERT_VAL("Cpu map - CPU ID doesn't match",
 139                                 perf_cpu_map__cpu(map, i).cpu == id.cpu.cpu);
 140
 141                 TEST_ASSERT_VAL("Cpu map - Core ID doesn't match",
 142                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
 143                 TEST_ASSERT_VAL("Cpu map - Socket ID doesn't match",
 144                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 145                         id.socket);
 146
 147                 TEST_ASSERT_VAL("Cpu map - Die ID doesn't match",
 148                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 149                 TEST_ASSERT_VAL("Cpu map - Node ID is set", id.node == -1);
 150                 TEST_ASSERT_VAL("Cpu map - Thread is set", id.thread == -1);
 151         }
 152
 153         // Test that core ID contains socket, die and core
 154         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 155                 id = aggr_cpu_id__core(perf_cpu_map__cpu(map, i), NULL);
 156                 TEST_ASSERT_VAL("Core map - Core ID doesn't match",
 157                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].core_id == id.core);
 158
 159                 TEST_ASSERT_VAL("Core map - Socket ID doesn't match",
 160                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 161                         id.socket);
 162
 163                 TEST_ASSERT_VAL("Core map - Die ID doesn't match",
 164                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 165                 TEST_ASSERT_VAL("Core map - Node ID is set", id.node == -1);
 166                 TEST_ASSERT_VAL("Core map - Thread is set", id.thread == -1);
 167         }
 168
 169         // Test that die ID contains socket and die
 170         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 171                 id = aggr_cpu_id__die(perf_cpu_map__cpu(map, i), NULL);
 172                 TEST_ASSERT_VAL("Die map - Socket ID doesn't match",
 173                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 174                         id.socket);
 175
 176                 TEST_ASSERT_VAL("Die map - Die ID doesn't match",
 177                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].die_id == id.die);
 178
 179                 TEST_ASSERT_VAL("Die map - Node ID is set", id.node == -1);
 180                 TEST_ASSERT_VAL("Die map - Core is set", id.core == -1);
 181                 TEST_ASSERT_VAL("Die map - CPU is set", id.cpu.cpu == -1);
 182                 TEST_ASSERT_VAL("Die map - Thread is set", id.thread == -1);
 183         }
 184
 185         // Test that socket ID contains only socket
 186         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 187                 id = aggr_cpu_id__socket(perf_cpu_map__cpu(map, i), NULL);
 188                 TEST_ASSERT_VAL("Socket map - Socket ID doesn't match",
 189                         session->header.env.cpu[perf_cpu_map__cpu(map, i).cpu].socket_id ==
 190                         id.socket);
 191
 192                 TEST_ASSERT_VAL("Socket map - Node ID is set", id.node == -1);
 193                 TEST_ASSERT_VAL("Socket map - Die ID is set", id.die == -1);
 194                 TEST_ASSERT_VAL("Socket map - Core is set", id.core == -1);
 195                 TEST_ASSERT_VAL("Socket map - CPU is set", id.cpu.cpu == -1);
 196                 TEST_ASSERT_VAL("Socket map - Thread is set", id.thread == -1);
 197         }
 198
 199         // Test that node ID contains only node
 200         for (i = 0; i < perf_cpu_map__nr(map); i++) {
 201                 id = aggr_cpu_id__node(perf_cpu_map__cpu(map, i), NULL);
 202                 TEST_ASSERT_VAL("Node map - Node ID doesn't match",
 203                                 cpu__get_node(perf_cpu_map__cpu(map, i)) == id.node);
 204                 TEST_ASSERT_VAL("Node map - Socket is set", id.socket == -1);
 205                 TEST_ASSERT_VAL("Node map - Die ID is set", id.die == -1);
 206                 TEST_ASSERT_VAL("Node map - Core is set", id.core == -1);
 207                 TEST_ASSERT_VAL("Node map - CPU is set", id.cpu.cpu == -1);
 208                 TEST_ASSERT_VAL("Node map - Thread is set", id.thread == -1);
 209         }
 210         perf_session__delete(session);
 211
 212         return 0;
 213 }
 214
 215 static int test__session_topology(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
 216 {
 217         char path[PATH_MAX];
 218         struct perf_cpu_map *map;
 219         int ret = TEST_FAIL;
 220
 221         TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
 222
 223         pr_debug("templ file: %s\n", path);
 224
 225         if (session_write_header(path))
 226                 goto free_path;
 227
 228         map = perf_cpu_map__new(NULL);
 229         if (map == NULL) {
 230                 pr_debug("failed to get system cpumap\n");
 231                 goto free_path;
 232         }
 233
 234         ret = check_cpu_topology(path, map);
 235         perf_cpu_map__put(map);
 236
 237 free_path:
 238         unlink(path);
 239         return ret;
 240 }
 241
 242 DEFINE_SUITE("Session topology", session_topology);