2432f78415
* affinity.c: Add comma between elements of cpu set. * tests/sched_xetaffinity.c (main): Update expected output.
111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2002-2004 Roland McGrath <roland@redhat.com>
|
|
* Copyright (c) 2009-2016 Dmitry V. Levin <ldv@altlinux.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "defs.h"
|
|
#include <sched.h>
|
|
|
|
static unsigned int
|
|
get_cpuset_size(void)
|
|
{
|
|
static unsigned int cpuset_size;
|
|
|
|
if (!cpuset_size) {
|
|
pid_t pid = getpid();
|
|
cpuset_size = 128;
|
|
while (cpuset_size &&
|
|
sched_getaffinity(pid, cpuset_size, NULL) == -1 &&
|
|
EINVAL == errno) {
|
|
cpuset_size <<= 1;
|
|
}
|
|
if (!cpuset_size)
|
|
cpuset_size = 128;
|
|
}
|
|
|
|
return cpuset_size;
|
|
}
|
|
|
|
static void
|
|
print_affinitylist(struct tcb *tcp, const unsigned long addr, const unsigned int len)
|
|
{
|
|
const unsigned int max_size = get_cpuset_size();
|
|
const unsigned int umove_size = len < max_size ? len : max_size;
|
|
const unsigned int size =
|
|
(umove_size + current_wordsize - 1) & -current_wordsize;
|
|
const unsigned int ncpu = size * 8;
|
|
void *cpu;
|
|
|
|
if (!verbose(tcp) || (exiting(tcp) && syserror(tcp)) ||
|
|
!addr || !len || !(cpu = calloc(size, 1))) {
|
|
printaddr(addr);
|
|
return;
|
|
}
|
|
|
|
if (!umoven_or_printaddr(tcp, addr, umove_size, cpu)) {
|
|
int i = 0;
|
|
const char *sep = "";
|
|
|
|
tprints("[");
|
|
for (;; i++) {
|
|
i = next_set_bit(cpu, i, ncpu);
|
|
if (i < 0)
|
|
break;
|
|
tprintf("%s%d", sep, i);
|
|
sep = ", ";
|
|
}
|
|
if (size < len)
|
|
tprintf("%s...", sep);
|
|
tprints("]");
|
|
}
|
|
|
|
free(cpu);
|
|
}
|
|
|
|
SYS_FUNC(sched_setaffinity)
|
|
{
|
|
const int pid = tcp->u_arg[0];
|
|
const unsigned int len = tcp->u_arg[1];
|
|
|
|
tprintf("%d, %u, ", pid, len);
|
|
print_affinitylist(tcp, tcp->u_arg[2], len);
|
|
|
|
return RVAL_DECODED;
|
|
}
|
|
|
|
SYS_FUNC(sched_getaffinity)
|
|
{
|
|
const int pid = tcp->u_arg[0];
|
|
const unsigned int len = tcp->u_arg[1];
|
|
|
|
if (entering(tcp)) {
|
|
tprintf("%d, %u, ", pid, len);
|
|
} else {
|
|
print_affinitylist(tcp, tcp->u_arg[2], tcp->u_rval);
|
|
}
|
|
return 0;
|
|
}
|