EN JA
SCHED_GETCPU(3)
SCHED_GETCPU(3) Linux Programmer's Manual SCHED_GETCPU(3)

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.

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)

COLOPHON

This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.
2013-04-17 Linux