sched_getcpu (3) - Linux Manuals
sched_getcpu: determine CPU on which the calling thread is running
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 callcpu = sched_getcpu();
is equivalent to the following getcpu(2) call:
int c, s; s = getcpu(&c, NULL, NULL); cpu = (s == -1) ? s : c;
COLOPHON
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