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



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 exe‐
       cuting.

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/.



Linux                                       2014-05-10                            SCHED_GETCPU(3)