A PCIE-based data transmission system, method and device

Abstract

This application discloses a data transmission system based on PCIE. After the data access initiator sends an instruction, the DMA module in the FPGA accelerator card transmits the first data amount through the register configured by the data access initiator, and the FPGA accelerator card The TXS module transmits the second data volume, and thereafter, the first data volume and the second data volume transmitted by the DMA module or the TXS module are sent through the PCIE interface. Wherein, the first data amount is larger than the threshold, and the second data amount is smaller than the threshold. Therefore, the DMA module can be used for transmission of large data volumes greater than the threshold value, and the TXS module can be used for data transmission of small data volumes not greater than the threshold value. Since the TXS module can realize data transmission of small data volumes without configuring registers, Improved data transfer efficiency for small data volumes. In addition, the present application also discloses a PCIE-based data transmission method and device, with the above effects.

Description

technical field [0001] The present invention relates to the field of servers, in particular to a PCIE-based data transmission system, method and device. Background technique [0002] The Field-Programmable Gate Array (FPGA) accelerator card is connected to the data access initiator through the PCIE interface, and the data access initiator sends the data to be accelerated to the FPGA accelerator card through the PCIE interface. After processing by the FPGA accelerator card Through the PCIE interface, it returns to the memory of the initiator of the data access. During the process of data transmission, the FPGA accelerator card transmits a large amount of data. In order to improve the data transmission rate, the FPGA accelerator card introduces the Direct Memory Access , DMA) mechanism. [0003] The DMA function after introducing the DMA mechanism in the FPGA accelerator card is mainly divided into two types, one is the DMA controller, and the other is the DMA mover. The dev...

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Problems solved by technology

However, for the transmission of small data volumes, it is also necessary for the data access initiator or the user to configure registers for the DMA controller, the DMA controller regenerates the descriptor, and then the DMA mover performs the data movement operation. At this time, for small data volume data In terms of transmission, there is no need to transmit data through the method of transmitting a large amount of data configuration registers. According to the data transmission method of transmitting a large amount of data, the efficiency of data transmission with a small amount of data will be low

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