GENWiki

Premier IT Outsourcing and Support Services within the UK

User Tools

Site Tools


man:sched_getcpu

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 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).
     +---------------+---------------+---------+
     |Interface      | Attribute     | Value   |
     +---------------+---------------+---------+
     |sched_getcpu() | Thread safety | MT-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 4.16 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
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 SCHED_GETCPU(3)

/data/webs/external/dokuwiki/data/pages/man/sched_getcpu.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki