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

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

NAME         top

       sched_getcpu - determine CPU on which the calling thread is running

SYNOPSIS         top

       #define _GNU_SOURCE
       #include <utmpx.h>

       int sched_getcpu(void);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       sched_getcpu(): _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION         top

       sched_getcpu() returns the number of the CPU on which the calling thread is
       currently executing.

RETURN VALUE         top

       On success, sched_getcpu() returns a non-negative CPU number.  On error, -1 is
       returned and errno is set to indicate the error.

ERRORS         top

       ENOSYS This kernel does not implement getcpu(2).

VERSIONS         top

       This function is available since glibc 2.6.

CONFORMING TO         top

       sched_getcpu() is glibc specific.

NOTES         top

       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         top

       getcpu(2)

COLOPHON         top

       This page is part of release 3.21 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/.

Linux                                 2008-07-03                      SCHED_GETCPU(3)