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sched_getcpu

Section: C Library Functions (3)
Updated: 202-0-17
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sched_getcpu - determine CPU on which the calling thread is running

Standard C library (libc,~-lc)

#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 */

sched_getcpu() returns the number of the CPU on which the calling thread is currently executing.

On success, sched_getcpu() returns a nonnegative CPU number. On error, -1 is returned and errno is set to indicate the error.

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
sched_getcpu()	Thread safety	M-Safe

GNU.

glibc 2.6.

The call cpu = sched_getcpu(); is equivalent to the following getcpu(2) call: int c, s; s = getcpu(&c, NULL); cpu = (s == -1) ? s : c;