Caching management unit and caching management method

Abstract

The invention discloses a cache management unit and a cache management method. The cache management unit comprises a state calculation circuit for calculating effective data in a cache and obtaining a cache state according to calculation of effective data values; a state indication circuit for outputting the cache state to a producer and / or a consumer; a writing synchronization circuit for sending a writing synchronization signal to perform writing synchronization operation on the state calculation circuit when the producer really writings primary data in the cache at each time; a reading synchronization circuit for sending a reading synchronization signal to perform reading synchronization operation on the state calculation circuit when the customer receives the primary data in the cache at each time; a writing presynchronization circuit for sending a writing presynchronization signal to perform writing presynchronization operation on the state calculation circuit when the producer sends out a write command at each time; and a reading presynchronization circuit for sending a reading presynchronization signal to perform reading presynchronization operation on the state calculation circuit when the customer sends out a read command at each time. The cache management unit and the cache management method help enhance the overall cache efficiency.

Description

technical field [0001] The invention relates to cache management, in particular to a cache management unit and a corresponding cache management method realized by hardware circuits. Background technique [0002] In system design, data is often passed from producers to consumers. Generally, cache resources are needed between producers and consumers to cache data. Cache resources generally include storage resources such as SRAM, SDRAM, and FIFO. Cache resources need to be managed so that producers and consumers can correctly obtain the state of the cache when accessing the cache, thereby avoiding resource conflicts. [0003] Generally, each time a producer writes data to the cache can be divided into three serial processes: the producer generates data, the producer sends a write command, and the data is written into the cache. Every time a consumer reads data from the cache, it can be divided into two serial processes: the consumer sends a read command and the consumer rece...

AI Technical Summary

Problems solved by technology

The cache management unit cannot provide the status of the cache in advance. Therefore, in the basic cache management unit, actions such as the producer's next generation of data and the producer's current write command cannot be carried out in parallel.

Even if there is extra space in the cache, the basic cache management unit cannot allow the producer to continue to produce data

Every time the producer completes all operations from generating data, sending write commands to writing data into the cache, the next data generating operation can be restarted, which cannot make full use of the delay in generating data, resulting in loss of efficiency

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