SCHED_GETCPU
Section: Linux Programmer's Manual (3)
Updated: 2014-05-10
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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
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)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- ATTRIBUTES
-
- Multithreading (see pthreads(7))
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
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Time: 02:54:58 GMT, September 18, 2014