Linux manual pages Section 3  

Name

sched_getcpu — determine CPU on which the calling thread is running

Synopsis

#define _GNU_SOURCE
#include <sched.h>
int sched_getcpu( void);  
 
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
sched_getcpu():
_BSD_SOURCE || _SVID_SOURCE

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 3.24 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/.


  Copyright (c) 2008, Linux Foundation, written by Michael Kerrisk
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