A data transmission method, device and equipment

Abstract

The invention discloses a data transmission method. The bus controller in the application can cache the data specified in the data acquisition task, and notify the DMA controller to directly extract the cached data when the data cache volume reaches the first preset threshold. For the data of the first preset threshold size, since the DMA controller can acquire the cached data of the first preset threshold size at one time, the data volume of the single acquired data is increased, and the data acquisition speed of the BMC is also improved, and The DMA controller only needs to interact with the bus controller and extract data when it is notified to extract data, which reduces the occupation time of the DMA controller and improves the use efficiency of the DMA controller. The invention also discloses a data transmission device and equipment, which have the same beneficial effects as the above data transmission method.

Description

technical field [0001] The present invention relates to the field of servers, in particular to a data transmission method, and also to a data transmission device and equipment. Background technique [0002] BMC (Baseboard Management Controller, Baseboard Management Controller) often needs to obtain data from the memory, for example, the boot program of the BMC is stored in the memory, and when the BMC obtains data from the memory, it usually commands DMA (Direct Memory Access, direct memory access Access) the controller obtains data from the memory through the bus controller, but in the prior art, the DMA controller can only be ordered to obtain data from the memory in the form of one unit of data at a time through the bus controller, due to the characteristics of obtaining data unit by unit , resulting in slow data acquisition, and usually the data acquisition task cannot acquire only one unit of data, which requires the DMA controller to continuously interact with the bus ...

AI Technical Summary

Problems solved by technology

[0002] BMC (Baseboard Management Controller, Baseboard Management Controller) often needs to obtain data from the memory, for example, the boot program of the BMC is stored in the memory, and when the BMC obtains data from the memory, it usually commands DMA (Direct Memory Access, direct memory access Access) the controller obtains data from the memory through the bus controller, but in the prior art, the DMA controller can only be ordered to obtain data from the memory in the form of one unit of data at a time through the bus controller, due to the characteristics of obtaining data unit by unit , resulting in slow data acquisition, and usually the data acquisition task cannot acquire only one unit of data, which requires the DMA controller to continuously interact with the bus controller when executing the data acquisition task. The occupation time is longer, which reduces the efficiency of the DMA controller

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