Method and device for communication based on queue

Abstract

Embodiments of the invention provide a method and a device for communication based on queues. An adapter connected with a sending node comprises an arbiter, a prefetcher, a cache memory, and a sending engine. The method comprises: the prefetcher receiving the identify label of a to-be-processed queue sent by the arbiter, the identify label of the to-be-processed queue being acquired by the arbiter when acquiring the identify label of a present processing queue; and the prefetcher determining whether the cache memory is stored with the context of the to-be-processed queue, if the context is not stored, reading the context of the to-be-processed queue from the internal memory of the sending node, and storing to the cache memory, and when the sending engine sends data of the to-be-processed queue, the context being used. Thus, data transmission performance of nodes using QP communication is obviously improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a queue-based communication method and device. Background technique [0002] When the node uses the queue-based communication mechanism QP (Queue Pair) for data transmission, it will first establish three queues for the QP in the memory: the sending queue SQ (Send Queue), the receiving queue RQ (Receive Queue), and the completion queue CQ ( Completion Queue), and then transmit data through the adapter adapter connected to the node. [0003] Combine below figure 1 The shown schematic diagram of the sending scenario of the adapter briefly introduces the data sending process. [0004] First, the arbiter arbiter determines the identity of the currently processed QP, and the send queue process engine judges whether the context of the QP is saved in the cache memory, and if so, reads it directly from the cache; if not, Then the current processing process is suspende...

AI Technical Summary

Problems solved by technology

[0010] From the introduction of the sending and receiving process above, it can be seen that because only some commonly used QP contexts are saved in the cache, it may not be possible to find the QP context in the cache, and once the cache misses, it will cost a lot of money. Cache replacement will reduce the data transmission performance of nodes using QP communication

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