1/* Tests for sched_getaffinity with large buffers.
2 Copyright (C) 2021-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <array_length.h>
20#include <sched.h>
21#include <support/check.h>
22
23/* NB: this test may fail on system with more than 32k cpus. */
24
25static int
26do_test (void)
27{
28 /* The values are larger than the default cpu_set_t. */
29 const int bufsize[] = { 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 1<<16, 1<<17 };
30 int cpucount[array_length (bufsize)];
31
32 for (int i = 0; i < array_length (bufsize); i++)
33 {
34 cpu_set_t *cpuset = CPU_ALLOC (bufsize[i]);
35 TEST_VERIFY (cpuset != NULL);
36 size_t size = CPU_ALLOC_SIZE (bufsize[i]);
37 TEST_COMPARE (sched_getaffinity (0, size, cpuset), 0);
38 cpucount[i] = CPU_COUNT_S (size, cpuset);
39 CPU_FREE (cpuset);
40 }
41
42 for (int i = 0; i < array_length (cpucount) - 1; i++)
43 TEST_COMPARE (cpucount[i], cpucount[i + 1]);
44
45 return 0;
46}
47
48#include <support/test-driver.c>
49

source code of glibc/posix/tst-sched_getaffinity.c