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SCHED_GETCPU

Linux Programmer's Manual (3)
2014-04-28
 

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.  

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

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Index

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

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Time: 21:43:02 GMT, July 12, 2014