SCHED_GETCPU(3) - man page online | library functions

Determine CPU on which the calling thread is running.

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 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 4.04 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
Linux 2015-03-02 SCHED_GETCPU(3)
This manual Reference Other manuals
sched_getcpu(3) referred by getcpu(2) | procenv(1) | pthread_setaffinity_np(3) | sched(7) | sched_setaffinity(2)
refer to attributes(7) | feature_test_macros(7) | getcpu(2) | sched(7)