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