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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/tests/topology.c | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/tests/topology.c')
-rw-r--r-- | tools/perf/tests/topology.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/tools/perf/tests/topology.c b/tools/perf/tests/topology.c new file mode 100644 index 000000000..f4a2c0df0 --- /dev/null +++ b/tools/perf/tests/topology.c @@ -0,0 +1,140 @@ +// 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; +} |