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/* Tests for sched_getaffinity with large buffers.
Copyright (C) 2021-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <sched.h>
#include <support/check.h>
/* NB: this test may fail on system with more than 32k cpus. */
static int
do_test (void)
{
/* The values are larger than the default cpu_set_t. */
const int bufsize[] = { 1<<11, 1<<12, 1<<13, 1<<14, 1<<15, 1<<16, 1<<17 };
int cpucount[array_length (bufsize)];
for (int i = 0; i < array_length (bufsize); i++)
{
cpu_set_t *cpuset = CPU_ALLOC (bufsize[i]);
TEST_VERIFY (cpuset != NULL);
size_t size = CPU_ALLOC_SIZE (bufsize[i]);
TEST_COMPARE (sched_getaffinity (0, size, cpuset), 0);
cpucount[i] = CPU_COUNT_S (size, cpuset);
CPU_FREE (cpuset);
}
for (int i = 0; i < array_length (cpucount) - 1; i++)
TEST_COMPARE (cpucount[i], cpucount[i + 1]);
return 0;
}
#include <support/test-driver.c>
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