Controller for realizing configuration information cache update in reconfigurable system

Abstract

The invention discloses a controller for realizing configuration information cache update in a reconfigurable system. The controller comprises a configuration information cache unit, an off-chip memory interface module and a cache control unit, wherein the configuration information cache unit is used for caching configuration information which can be used by a certain reconfigurable array or some reconfigurable arrays within a period of time, the off-chip memory interface module is used for reading the configuration information from an external memory and transmitting the configuration information to the configuration information cache unit, and the cache control unit is used for controlling the reconfiguration process of the reconfigurable arrays. The reconfiguration process includes: mapping subtasks in an algorithm application to a certain reconfigurable array; setting a priority strategy of the configuration information cache unit; replacing the configuration information in the configuration information cache unit according to an LRU_FRQ replacement strategy. The invention further provides a method for realizing configuration information cache update in the reconfigurable system. Cache is updated by the aid of the LRU_FRQ replacement strategy, a traditional mode of updating the configuration information cache is changed, and the dynamic reconfiguration efficiency of the reconfigurable system is improved.

Description

technical field [0001] The invention relates to the field of embedded reconfigurable design, in particular to a controller and a control method for realizing configuration information buffer update in a reconfigurable system. Background technique [0002] There are two main traditional calculation methods, one is application-specific integrated circuits, which perform specific operations in hardware. However, ASICs are designed for a specific computing task, and it is very difficult to change their function once produced. The other is a general-purpose microprocessor, which executes a series of instructions to complete specific computing tasks. It has strong flexibility, but this flexibility is at the expense of performance. Reconfigurable computing is proposed to fill the gap between hardware implementation and software implementation. It tries to achieve higher performance than software implementation while providing certain hardware flexibility. In recent years, reconfi...

AI Technical Summary

Problems solved by technology

The LRU policy is to replace the configuration information with the least number of visits in the most recent period. It is often only an approximate implementation. For large-capacity cache units, the LRU policy cannot effectively hit the configuration information, which reduces the hit rate of the configuration information and may cause configuration information. The cache will save the same configuration information, which will reduce the utilization rate of the configuration information cache and reduce the access efficiency of configuration information, thus limiting the improvement of reconfigurable system reconfiguration performance and work performance

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