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- // SPDX-License-Identifier: GPL-2.0
- #include <string.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <perf/cpumap.h>
- #include "cpumap.h"
- #include "tests.h"
- #include "session.h"
- #include "evlist.h"
- #include "debug.h"
- #include <linux/err.h>
- #define TEMPL "/tmp/perf-test-XXXXXX"
- #define DATA_SIZE 10
- static int get_temp(char *path)
- {
- int fd;
- strcpy(path, TEMPL);
- fd = mkstemp(path);
- if (fd < 0) {
- perror("mkstemp failed");
- return -1;
- }
- close(fd);
- return 0;
- }
- static int session_write_header(char *path)
- {
- struct perf_session *session;
- struct perf_data data = {
- .path = path,
- .mode = PERF_DATA_MODE_WRITE,
- };
- session = perf_session__new(&data, false, NULL);
- TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
- session->evlist = perf_evlist__new_default();
- TEST_ASSERT_VAL("can't get evlist", session->evlist);
- perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
- perf_header__set_feat(&session->header, HEADER_NRCPUS);
- perf_header__set_feat(&session->header, HEADER_ARCH);
- session->header.data_size += DATA_SIZE;
- TEST_ASSERT_VAL("failed to write header",
- !perf_session__write_header(session, session->evlist, data.file.fd, true));
- evlist__delete(session->evlist);
- perf_session__delete(session);
- return 0;
- }
- static int check_cpu_topology(char *path, struct perf_cpu_map *map)
- {
- struct perf_session *session;
- struct perf_data data = {
- .path = path,
- .mode = PERF_DATA_MODE_READ,
- };
- int i;
- session = perf_session__new(&data, false, NULL);
- TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
- /* On platforms with large numbers of CPUs process_cpu_topology()
- * might issue an error while reading the perf.data file section
- * HEADER_CPU_TOPOLOGY and the cpu_topology_map pointed to by member
- * cpu is a NULL pointer.
- * Example: On s390
- * CPU 0 is on core_id 0 and physical_package_id 6
- * CPU 1 is on core_id 1 and physical_package_id 3
- *
- * Core_id and physical_package_id are platform and architecture
- * dependend and might have higher numbers than the CPU id.
- * This actually depends on the configuration.
- *
- * In this case process_cpu_topology() prints error message:
- * "socket_id number is too big. You may need to upgrade the
- * perf tool."
- *
- * This is the reason why this test might be skipped.
- */
- if (!session->header.env.cpu)
- return TEST_SKIP;
- for (i = 0; i < session->header.env.nr_cpus_avail; i++) {
- if (!cpu_map__has(map, i))
- continue;
- pr_debug("CPU %d, core %d, socket %d\n", i,
- session->header.env.cpu[i].core_id,
- session->header.env.cpu[i].socket_id);
- }
- for (i = 0; i < map->nr; i++) {
- TEST_ASSERT_VAL("Core ID doesn't match",
- (session->header.env.cpu[map->map[i]].core_id == (cpu_map__get_core(map, i, NULL) & 0xffff)));
- TEST_ASSERT_VAL("Socket ID doesn't match",
- (session->header.env.cpu[map->map[i]].socket_id == cpu_map__get_socket(map, i, NULL)));
- }
- perf_session__delete(session);
- return 0;
- }
- int test__session_topology(struct test *test __maybe_unused, int subtest __maybe_unused)
- {
- char path[PATH_MAX];
- struct perf_cpu_map *map;
- int ret = TEST_FAIL;
- TEST_ASSERT_VAL("can't get templ file", !get_temp(path));
- pr_debug("templ file: %s\n", path);
- if (session_write_header(path))
- goto free_path;
- map = perf_cpu_map__new(NULL);
- if (map == NULL) {
- pr_debug("failed to get system cpumap\n");
- goto free_path;
- }
- ret = check_cpu_topology(path, map);
- perf_cpu_map__put(map);
- free_path:
- unlink(path);
- return ret;
- }
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