Abstract:

The highspeed processing for HPL benchmark programs urgently needs to create a DMA transmission way to improve the processing speed of the algorithm as much as possible. Meanwhile, the processing speed of the GEMM algorithm is also determined by the DDR's memory access efficiency. However, the GEMM algorithm operation accounts for 90% in that of the HPL benchmark programs. Thus in order to improve the processing speed of this algorithm, combining the characteristics of the DMA transmission mode, we elaborate a pointtopoint transmission mode design scheme based on intercore synchronization. The actual measurements show that, compared with general transmission modes, the transmission speed and the memory access efficiency of the  DMA is improved by 256.74%, which greatly reduces the time overhead and meets the processing need of the HPL algorithm.

Key words: DMA;inter-core synchronization;multicore DSP;transmission method