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136 lines
4.3 KiB
136 lines
4.3 KiB
4 months ago
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/*
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* This file is part of sched_xetaffinity strace test.
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*
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* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#include <sched.h>
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#if defined __NR_sched_getaffinity && defined __NR_sched_setaffinity \
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&& defined CPU_ISSET_S && defined CPU_ZERO_S && defined CPU_SET_S
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# include <assert.h>
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# include <errno.h>
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# include <stdio.h>
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# include <unistd.h>
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static const char *errstr;
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static int
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getaffinity(unsigned long pid, unsigned long size, void *set)
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{
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int rc = syscall(__NR_sched_getaffinity, pid, size, set);
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errstr = sprintrc(rc);
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return rc;
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}
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static int
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setaffinity(unsigned long pid, unsigned long size, void *set)
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{
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int rc = syscall(__NR_sched_setaffinity, pid, size, set);
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errstr = sprintrc(rc);
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return rc;
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}
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int
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main(void)
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{
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unsigned int cpuset_size = 1;
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const pid_t pid = getpid();
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while (cpuset_size) {
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assert(getaffinity(pid, cpuset_size, NULL) == -1);
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if (EFAULT == errno)
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break;
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if (EINVAL != errno)
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perror_msg_and_skip("sched_getaffinity");
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printf("sched_getaffinity(%d, %u, NULL) = %s\n",
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pid, cpuset_size, errstr);
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cpuset_size <<= 1;
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}
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assert(cpuset_size);
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printf("sched_getaffinity(%d, %u, NULL) = %s\n",
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pid, cpuset_size, errstr);
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cpu_set_t *cpuset = tail_alloc(cpuset_size);
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getaffinity(pid, cpuset_size, cpuset + 1);
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printf("sched_getaffinity(%d, %u, %p) = %s\n",
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pid, cpuset_size, cpuset + 1, errstr);
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int ret_size = getaffinity(pid, cpuset_size, cpuset);
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if (ret_size < 0)
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perror_msg_and_fail("sched_getaffinity(%d, %u, %p) = %s\n",
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pid, (unsigned) cpuset_size, cpuset, errstr);
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assert(ret_size <= (int) cpuset_size);
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printf("sched_getaffinity(%d, %u, [", pid, cpuset_size);
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const char *sep;
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unsigned int i, cpu;
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for (i = 0, cpu = 0, sep = ""; i < (unsigned) ret_size * 8; ++i) {
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if (CPU_ISSET_S(i, (unsigned) ret_size, cpuset)) {
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printf("%s%u", sep, i);
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sep = ", ";
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cpu = i;
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}
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}
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printf("]) = %s\n", errstr);
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CPU_ZERO_S(cpuset_size, cpuset);
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CPU_SET_S(cpu, cpuset_size, cpuset);
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if (setaffinity(pid, cpuset_size, cpuset))
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perror_msg_and_skip("sched_setaffinity");
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printf("sched_setaffinity(%d, %u, [%u]) = 0\n",
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pid, cpuset_size, cpu);
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const unsigned int big_size = cpuset_size < 128 ? 128 : cpuset_size * 2;
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cpuset = tail_alloc(big_size);
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ret_size = getaffinity(pid, big_size, cpuset);
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if (ret_size < 0)
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perror_msg_and_fail("sched_getaffinity(%d, %u, %p) = %s\n",
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pid, big_size, cpuset, errstr);
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assert(ret_size <= (int) big_size);
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printf("sched_getaffinity(%d, %u, [", pid, big_size);
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for (i = 0, sep = ""; i < (unsigned) ret_size * 8; ++i) {
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if (CPU_ISSET_S(i, (unsigned) ret_size, cpuset)) {
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printf("%s%u", sep, i);
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sep = ", ";
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}
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}
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printf("]) = %s\n", errstr);
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_sched_getaffinity && __NR_sched_setaffinity"
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" && CPU_ISSET_S && CPU_ZERO_S && CPU_SET_S")
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#endif
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