Multi-processor computing system having fast processor response to cache agent request capacity limit warning

摘要

An apparatus is described that includes a plurality of processors, a plurality of cache slices and respective cache agents. Each of the cache agents have a buffer to store requests from the processors. The apparatus also includes a network between the processors and the cache slices to carry traffic of transactions that invoke the processors and/or said cache agents. The apparatus also includes communication resources between the processors and the cache agents reserved to transport one or more warnings from one or more of the cache agents to the processors that the one or more cache agents' respective buffers have reached a storage capacity threshold.

主权项

1. An apparatus comprising:
a plurality of processors; a plurality of cache slices and respective cache agents, each of said cache agents having a buffer to store requests from said processors; a network between said processors and said cache slices to carry traffic of transactions that invoke said processors and said cache agents; and communication resources between said processors and said cache agents reserved to transport one or more warnings from one or more of said cache agents to said processors that said one or more cache agents' respective buffers have reached a storage capacity threshold, wherein each of said processors has an interface coupled to said communication resources, said interface having electronic circuitry to reduce issuance of un-credited traffic by its respective processor in response to reception of said one or more warnings.