Data transfer bus communication to receive data by sending request instruction attached with identifier indicating processor and thread context identities

摘要

Systems and methods for managing context switches among threads in a processing system. A processor may perform a context switch between threads using separate context registers. A context switch allows a processor to switch from processing a thread that is waiting for data to one that is ready for additional processing. The processor includes control registers with entries which may indicate that an associated context is waiting for data from an external source.

主权项

1. A processing system, comprising:
a processor; and a controller coupled to the processor and configured to be coupled to a bus, to send an instruction to a device coupled to the bus, and to add a first identifier to the instruction to indicate an identity of the processor and an identity of a context of a thread that produced the instruction, wherein the device is configured and arranged to return data to the processor identified by the first identifier.