Function spawn_raw_with_affinity 

pub fn spawn_raw_with_affinity<F>(
    entry: F,
    name: String,
    stack_size: usize,
    affinity: CpuSet,
) -> Result<ThreadHandle, TaskError>
where
    F: FnOnce() + Send + 'static,

Creates a scheduler-owned kernel thread with pre-publication affinity.