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.TH SCHED_GETCPU 3 2010-10-31 "Linux" "Linux Programmer's Manual"
.SH NAME
sched_getcpu \- determine CPU on which the calling thread is running
.SH SYNOPSIS
.nf
.BR "#define _GNU_SOURCE" "         /* See feature_test_macros(7) */"
.\" Really:_BSD_SOURCE || _SVID_SOURCE
.B #include <sched.h>

.B int sched_getcpu(void);
.fi
.SH DESCRIPTION
.BR sched_getcpu ()
returns the number of the CPU on which the calling thread is currently executing.
.SH RETURN VALUE
On success,
.BR sched_getcpu ()
returns a nonnegative CPU number.
On error, \-1 is returned and
.I errno
is set to indicate the error.
.SH ERRORS
.TP
.B ENOSYS
This kernel does not implement
.BR getcpu (2).
.SH VERSIONS
This function is available since glibc 2.6.
.SH CONFORMING TO
.BR sched_getcpu ()
is glibc specific.
.SH NOTES
The call
.in +4n
.nf

cpu = sched_getcpu();

.fi
.in
is equivalent to the following
.BR getcpu (2)
call:
.in +4n
.nf

int c, s;
s = getcpu(&c, NULL, NULL);
cpu = (s == \-1) ? s : c;
.fi
.in
.SH SEE ALSO
.BR getcpu (2)
.SH COLOPHON
This page is part of release 3.44 of the Linux
.I man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.