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09ea1afec7
Some kernels on S390 appear to return a CPU affinity mask based on configured processors rather than the ones online. Overallocate the CPU set to match that, but operate only on the ones online. Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Co-authored-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* CPU Affinity inheritance test - sched_{gs}etaffinity.
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Copyright The GNU Toolchain Authors.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* See top level comment in nptl/tst-skeleton-affinity-inheritance.c for a
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description of this test. */
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#include <sched.h>
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#include <string.h>
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#include <stdio.h>
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#include <support/check.h>
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static void
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set_my_affinity (size_t size, const cpu_set_t *set)
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{
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int ret = sched_setaffinity (0, size, set);
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if (ret != 0)
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FAIL ("sched_setaffinity returned %d (%s)", ret, strerror (ret));
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}
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static void
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verify_my_affinity (int nproc, int nproc_configured, size_t size,
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const cpu_set_t *expected_set)
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{
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cpu_set_t *set = CPU_ALLOC (nproc_configured);
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cpu_set_t *xor_set = CPU_ALLOC (nproc_configured);
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if (set == NULL || xor_set== NULL)
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FAIL_EXIT1 ("verify_my_affinity: Failed to allocate cpuset: %m\n");
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int ret = sched_getaffinity (0, size, set);
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if (ret != 0)
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FAIL ("sched_getaffinity returned %d (%s)", ret, strerror (ret));
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CPU_XOR_S (size, xor_set, expected_set, set);
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int cpucount = CPU_COUNT_S (size, xor_set);
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if (cpucount > 0)
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{
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FAIL ("Affinity mask not inherited, "
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"following %d CPUs mismatched in the expected and actual sets:\n",
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cpucount);
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for (int cur = 0; cur < nproc && cpucount >= 0; cur++)
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if (CPU_ISSET_S (size, cur, xor_set))
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{
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printf ("%d ", cur);
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cpucount--;
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}
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printf ("\n");
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}
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CPU_FREE (set);
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CPU_FREE (xor_set);
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}
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#include <nptl/tst-skeleton-affinity-inheritance.c>
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