Data transmission method for sparse matrix vector multiplication and DMA transmission device

A data transmission method and sparse matrix technology, applied in the field of processor micro-architecture, can solve the problems of limited x-vector memory access efficiency, complex hardware structure, multiple hardware resources, etc., and achieve simple flexibility, wide application range, and access speed. quick effect

Pending Publication Date: 2020-04-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0006] However, the above solution has problems such as complex hardware structure, hi

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  • Data transmission method for sparse matrix vector multiplication and DMA transmission device
  • Data transmission method for sparse matrix vector multiplication and DMA transmission device
  • Data transmission method for sparse matrix vector multiplication and DMA transmission device

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0038] Such as figure 1 , 2 As shown, the present embodiment is oriented to the data transmission method of sparse matrix-vector multiplication, and the method includes: when x-vector data needs to be accessed during the sparse matrix-vector multiplication solution process, configuring the DMA data channel APip to perform x-vector data according to the SuperGather data transmission mode For irregular memory access, the DMA data channel APip first reads the index of the source address from outside the core, and generates the actual read address of the source data from the base address and the index of the read source address. According to the index of the generated source data The actual read address sends a read data request with a read return address, and move...

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Abstract

The invention discloses a data transmission method for sparse matrix vector multiplication and a DMA transmission device. The method comprises the following steps: when x vector data needs to be accessed in the sparse matrix vector multiplication solving process, configuring a DMA (Direct Memory Access) data channel APip so as to carry out irregular memory access on the x vector data according toa SuperGather data transmission mode; during memory access, the DMA data channel APip firstly reading the index of the source address from the outside of the core; and generating an actual read address of the source data according to the base address and the index of the read source address, sending a read data request with a read return address according to the generated actual read address of the source data, and moving x vector data required by sparse matrix vector multiplication calculation to the in-core memory bank from the outside of the core. The method has the advantages of being simple in implementation method, high in access speed, high in accuracy, less in occupied resource, flexible in application and the like.

Description

technical field [0001] The invention relates to the technical field of processor micro-architecture, in particular to a data transmission method and a DMA transmission device oriented to sparse matrix-vector multiplication. Background technique [0002] Sparse Multiple-Vector Multiplication (SpMV) is one of the important algorithms for iteratively solving large linear equations, and it is widely used in scientific research and engineering practice fields such as circuit analysis and geological analysis. Since the SpMV algorithm is frequently called in the calculation of large linear equations, and a large number of discrete indirect addressing operations are generated during the calculation process, it will occupy a large amount of hardware resources and reduce the system's computing performance. Therefore, improving the computing performance of SpMV is a widely concerned issue at present. [0003] The system of equations processed by the SpMV algorithm can be expressed as ...

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Application Information

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IPC IPC(8): G06F17/16G06F13/28
CPCG06F17/16G06F13/28
Inventor 刘胜孙书为陈海燕刘仲杨柳曹亚松张洋刘畅
Owner NAT UNIV OF DEFENSE TECH
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