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():

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¶

Multithreading (see pthreads(7))¶

The sched_getcpu() function is thread-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 3.74 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 http://www.kernel.org/doc/man-pages/.