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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 = 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));
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, id;
session = perf_session__new(&data, false, NULL);
TEST_ASSERT_VAL("can't get session", !IS_ERR(session));
cpu__setup_cpunode_map();
/* 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. aarch64 and
* s390 always write this part of the header, even when the above
* condition is true (see do_core_id_test in header.c). So always
* run this test on those platforms.
*/
if (!session->header.env.cpu
&& strncmp(session->header.env.arch, "s390", 4)
&& strncmp(session->header.env.arch, "aarch64", 7))
return TEST_SKIP;
TEST_ASSERT_VAL("Session header CPU map not set", session->header.env.cpu);
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);
}
// Test that core ID contains socket, die and core
for (i = 0; i < map->nr; i++) {
id = cpu_map__get_core(map, i, NULL);
TEST_ASSERT_VAL("Core map - Core ID doesn't match",
session->header.env.cpu[map->map[i]].core_id == cpu_map__id_to_cpu(id));
TEST_ASSERT_VAL("Core map - Socket ID doesn't match",
session->header.env.cpu[map->map[i]].socket_id ==
cpu_map__id_to_socket(id));
TEST_ASSERT_VAL("Core map - Die ID doesn't match",
session->header.env.cpu[map->map[i]].die_id == cpu_map__id_to_die(id));
}
// Test that die ID contains socket and die
for (i = 0; i < map->nr; i++) {
id = cpu_map__get_die(map, i, NULL);
TEST_ASSERT_VAL("Die map - Socket ID doesn't match",
session->header.env.cpu[map->map[i]].socket_id ==
cpu_map__id_to_socket(id << 16));
TEST_ASSERT_VAL("Die map - Die ID doesn't match",
session->header.env.cpu[map->map[i]].die_id ==
cpu_map__id_to_die(id << 16));
}
// Test that socket ID contains only socket
for (i = 0; i < map->nr; i++) {
id = cpu_map__get_socket(map, i, NULL);
TEST_ASSERT_VAL("Socket map - Socket ID doesn't match",
session->header.env.cpu[map->map[i]].socket_id == id);
}
// Test that node ID contains only node
for (i = 0; i < map->nr; i++) {
id = cpu_map__get_node(map, i, NULL);
TEST_ASSERT_VAL("Node map - Node ID doesn't match",
cpu__get_node(map->map[i]) == id);
}
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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