Causality-based memory access ordering in a multiprocessing environment

Abstract

Causality-based memory ordering in a multiprocessing environment. A disclosed embodiment includes a plurality of processors and arbitration logic coupled to the plurality of processors. The processors and arbitration logic maintain processor consistency yet allow stores generated in a first order by any two or more of the processors to be observed in a different order by at least one other of the other processors.

Description

technical field [0001] The present disclosure relates to the field of processing systems, and more particularly, the present disclosure relates to memory ordering techniques for multiprocessing systems. Background technique [0002] Improving the performance of a computer or other processing system generally improves overall throughput and / or provides a better user experience. One technique for improving the total amount of instructions processed in a system is to increase the number of processors in the system. However, implementing a multiprocessing (MP) system often requires more than parallel interconnected processors. For example, tasks or programs need to be partitioned so that they can be executed across parallel processing resources. [0003] Another major difficulty in MP systems is maintaining memory coherency (also known as coherency). Memory coherency is the general requirement that memory remain sufficiently updated to provide a current copy of the memory con...

AI Technical Summary

Problems solved by technology

[0009] Furthermore, memory ordering costs continue to increase substantially as systems implementing traditional memory ordering models scale up to meet additional processing problems

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