Alibaba Group Holding Limited
MULTI-CORE INTERCONNECTION BUS, INTER-CORE COMMUNICATION METHOD, AND MULTI-CORE PROCESSOR

Abstract:

The present invention discloses a multi-core interconnection bus, including a request transceiver module adapted to receive a data request from a processor core, and forward the data request to a snoop and caching module through a request execution module, where the data request includes a request address; the snoop and caching module adapted to look up cache data validity information of the request address, acquire data from a shared cache, and sequentially return the cache data validity information and the data acquired from the shared cache to the request execution module; and the request execution module adapted to determine, based on the cache data validity information, a target processor core whose local cache stores valid data, forward the data request to the target processor core, and receive returned data; and determine response data from the data returned by the target processor core and that returned by the snoop and caching module, and return, through the request transceiver module, the response data to the processor core that initiates the data request. The present invention also discloses a corresponding inter-core communication method and a multi-core processor.