SCHED_GETCPU

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
VERSIONS
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

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).

Image grohtml-113531.png

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

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