A method for improving the garbage collection execution effect of an EMMC through two-end interaction of a system

Abstract

The invention discloses a method for improving the garbage collection execution effect of an EMMC through two-end interaction of a system. The method comprises the following steps that the numerical value of the current device status register device of the device is obtained when the system is initialized; If the numerical value of the device status register is a specified value, an erase requestis sent to the device; The host judges whether an erase instruction needs to be sent to the device or not by reading the numerical value of the device; Therefore, the device can accurately execute thegarbage collection command, so that the garbage collection execution effect of the EMMC is improved, the long-term read-write efficiency is improved, the service life of the nand flash is prolonged,and meanwhile, the design difficulty of device end firmware is reduced.

Description

technical field [0001] The invention relates to the field of EMMC storage, in particular to a method for improving the garbage collection execution effect of EMMC through interaction between two ends of a system. Background technique [0002] The existing emmc products on the market use nand flash as the physical medium to store data. The defects include: the life of each storage block is limited, and wear leveling must be considered; overwriting cannot be overwritten, and it must be rewritten after erase; The solution is to perform garbage collection after evaluating the timing of the internal firmware of the device. Its garbage collection function is to notify the device to erase flash through the host initiating a request; although the accuracy is high, it has a great effect on the effective use of flash and its service life. Help, but the current use of this function has the following problems: the host does not know when to initiate an erase request, it is possible that...

AI Technical Summary

Problems solved by technology

[0002] The existing emmc products on the market use nand flash as the physical medium to store data, and its defects include: the life of each storage block is limited, and wear balance must be considered; it cannot be overwritten and must be erased before it can be rewritten; for this defect, the current The solution is that the internal firmware of the device evaluates the timing by itself and then performs garbage collection. The garbage collection function is to notify the device to erase flash through the host to initiate a request; although the accuracy is high, the effective use and service life of the flash are greatly improved. Help, but the current use of this function has the following problems: the host does not know when to initiate an erase request, it may be that the device does not need an erase flash internally, but the host sends it, or the device needs to initiate an erase request, but the host does not send this Request, so the effect of this function becomes very poor, and it cannot achieve the effect of real active garbage collection

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