Screening method, filter and data consistency maintenance system

Abstract

The invention provides a screening method, a screening device and a data consistency maintenance system. The method includes the steps that the screening device receives memory request addresses sent by an IP core; the screening device determines whether the memory request addresses are in a cache or not; if it is determined that the memory request addresses are not in the cache, a memory operation instruction is sent to the IP core, wherein the memory operation instruction is used for enabling the IP core to carry out memory operation according to the memory request addresses. Screening is carried out before data consistency operation to screen out the memory request addresses not in the cache, and then the IP core carries out memory operation directly according to the memory request addressees without carrying out cache inquiry, so that the cache query frequency is greatly reduced, the cache access rate is reduced, the cache access queuing time is shortened, and the cache performance is improved.

Description

technical field [0001] The invention relates to a microprocessor memory access technology, in particular to a screening method, a filter and a data consistency maintenance system. Background technique [0002] In modern parallel computers, the processor is often equipped with a high-speed cache memory. By storing the data frequently read and written by the processor in the high-speed cache, the processor does not need to access the slower memory all the time, but directly reads and writes the cache. Increased processing speed of the processor. In order to complete the design function of the IP core, the intellectual property (Intellectual Property, referred to as IP) core usually directly accesses the memory (Direct Memory Access, referred to as DMA) and obtains the data in the memory. However, since the data in the cache configured by the processor may not be updated to the memory after being updated, the memory and the data copy in the cache are inconsistent, which will c...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a screening method, a filter, and a data consistency maintenance system to solve the problem of increased cache access queuing time and reduced cache performance due to the large number of cache queries

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