一种面向异构多核DSP的数据流传输控制引擎设计与评测

根据多核DSP的应用特点,介绍了一种面向异构多核DSP的数据流传输控制引擎(DSTCE)的结构与设计,并实现了基于DSTCE的数据流前瞻传输技术.该技术以可编程的DSTCE模块为核心,实现了超节点内各个端口之间以及超节点之间的高效数据流传输,而且将传输过程与多核间的数据前瞻和编程模型有机结合起来.该技术避免了复杂的Cache一致性问题,显著提高了大规模多核DSP计算与访存的并行性.实验结果表明,采用DSTCE的多核DSP单个超节点的性能平均提高了22%,两个超节点情况下基于DSTCE结构的系统比基于CC-NUMA结构的系统性能平均提高了14%.

Design and Evaluation of a Data Streams Transmission Control Engine Customized for Heterogeneous MC-DSPs

This paper introduces a large-scale parallel MC-DSP prototype, PolyDSP constructed with heterogeneous super-nodes,and proposes a data speculation technique based on customized data streams transmission control engine (DSTCE). This technique implements high efficient data streams transmissions among different data ports within a super-node and transmissions between neighbor super-nodes. The superiority of this technique is that it can combine a data speculation solution with the programming model of PolyDSP,avoid complex cache coherence problems, thus improving the parallelism between data processing and memory accessing for MC-DSPs significantly. Our simulation results show that, the performance of single super-node of PolyDSP is improved by 22% on average, and the pcrformance of PolyDSP based on DSTCE is 14% higher than that of PolyDSP based on CC-NUMA structure with two super-nodes.