EXPANDABLE INTERRUPTION

The present disclosure generally relates to scalable interruptions. In one embodiment, an interrupt delivery mechanism for a system includes an interrupt controller; and a plurality of cluster interrupt controllers coupled to the respective plurality of processors. The interrupt controller may serially transmit interrupt requests to respective cluster interrupt controllers, which may acknowledge (Ack) or negative acknowledge (Nack) the interrupt based on attempting to deliver the interrupt to a processor to which the cluster interrupt controller is coupled. In soft iteration, the cluster interrupt controller may attempt to deliver the interrupt to the powered-on processor without attempting to power on the powered-off processor. If the soft iteration does not produce an Ack response from a cluster interrupt controller of the plurality of cluster interrupt controllers, a hard iteration may be performed in which the powered-off processors may be powered on. 本公开总体上涉及能扩展的中断。在一个实施方案中，一种用于系统的中断递送机构包括：中断控制器；以及多个集群中断