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NAME
sched_getcpu - determine CPU on which the calling thread is running
LIBRARY
Standard C library (libc, -lc)
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).
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤ │sched_getcpu() │ Thread safety │ MT-Safe │ └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘
STANDARDS
GNU.
HISTORY
glibc 2.6.
NOTES
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;
SEE ALSO
getcpu(2), sched(7)