SCHED_GETCPU
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Page Index
NAME
sched_getcpu - determine CPU on which the calling thread is running
SYNOPSIS
#include <sched.h>
int sched_getcpu(void);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
sched_getcpu():
-
- Since glibc 2.14:
-
_GNU_SOURCE
- Before glibc 2.14:
-
_BSD_SOURCE || _SVID_SOURCE
/* _GNU_SOURCE also suffices */
DESCRIPTION
sched_getcpu()
returns the number of the CPU on which the calling thread is currently executing.
RETURN VALUE
On success,
sched_getcpu()
returns a nonnegative CPU number.
On error, -1 is returned and
errno
is set to indicate the error.
ERRORS
- ENOSYS
-
This kernel does not implement
getcpu(2).
VERSIONS
This function is available since glibc 2.6.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
sched_getcpu()
| Thread safety | MT-Safe
|
CONFORMING TO
sched_getcpu()
is glibc-specific.
NOTES
The call
cpu = sched_getcpu();
is equivalent to the following
getcpu(2)
call:
int c, s;
s = getcpu(&c, NULL, NULL);
cpu = (s == -1) ? s : c;
SEE ALSO
getcpu(2),
sched(7)
COLOPHON
This page is part of release 5.10 of the Linux
man-pages
project.
A description of the project,
information about reporting bugs,
and the latest version of this page,
can be found at
https://www.kernel.org/doc/man-pages/.