Scheduling of interrupt

Hi All, I am asking below question for understanding. Pls help me to understand this: 1. How does APIC schedule interrupt on particular core ? How does Apic takes a decision that first few interrupt will be schedule on Core 0 and remaining for load balancing will be schedule on different core ? What are the advantage of scheduling interrupt always on core 0 w.r.t Cache hot and all ? 2. Is it possible that incoming interrupt can be scheduled on particular core rather than core 0 ? What is the configuration option or api is available for that inside kernel or in user space ? Thanks, Krishna