sched_getcpu(3) - Linux man page

Name

sched_getcpu - determine CPU on which the calling thread is running

Synopsis

#define _GNU_SOURCE         /* See feature_test_macros(7) */
#include <sched.h>

int sched_getcpu(void);

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)

Referenced By