为了提高嵌入式图形处理器GPU(Graphic Process Unit)中顶点染色处理器,设计了一款超长指令字格式的可编程顶点染色处理器,采用六级流水线实现,每条指令在同一个周期最多执行7种操作,软硬件协同设计,降低了功耗.采用基于FPGA的验证方式...为了提高嵌入式图形处理器GPU(Graphic Process Unit)中顶点染色处理器,设计了一款超长指令字格式的可编程顶点染色处理器,采用六级流水线实现,每条指令在同一个周期最多执行7种操作,软硬件协同设计,降低了功耗.采用基于FPGA的验证方式,可编程顶点染色处理器在Xilinx Virtex-7FPGAs V2000T上最大工作频率达到50MHz,顶点的处理速度达到0.16M/s,处理一个顶点平均44个周期,在Synopsys公司Design Compiler工具130μm工艺综合下,主频150MHz,功耗约为177.742 8mW.展开更多
In order to improve the network performance furthermore, a routing algorithm for 2D-Torus is investigated from the standpoint of load balance for virtual channels. The 2D-Torus network is divided into two virtual netw...In order to improve the network performance furthermore, a routing algorithm for 2D-Torus is investigated from the standpoint of load balance for virtual channels. The 2D-Torus network is divided into two virtual networks and each physical channel is split into three virtual channels. A novel virtual channel allocation policy and a routing algorithm are proposed, in which traffic load is distributed to those three virtual channels in a more load-balanced manner by introducing a random parameter. Simulations of the proposed algorithm are developed with a SystemC-based test bench. The results show that compared with the negative first for Torus networks （NF-T） algorithm, the proposed algorithm can achieve better performance in terms of network latency and throughput under different traffic patterns. It also shows that a routing algorithm with load balance for virtual channels can significantly improve the network performance furthermore.展开更多
To improve the scalability and reduce the implementation complexity of Mesh and Mesh-like networks, the semi-diagonal Torus （SD-Torus） network, a regular and symmetrical intercormection network is proposed. The SD-T...To improve the scalability and reduce the implementation complexity of Mesh and Mesh-like networks, the semi-diagonal Torus （SD-Torus） network, a regular and symmetrical intercormection network is proposed. The SD-Torus network is a combination of a typical 2D-Torus network with two extra diagonal links from northwest to southeast direction for each node. The topological properties of SD-Torus networks are discussed, and a load balanced routing algorithm for SD-Torus is presented. System-C based simulation result shows that, compared with diagonal Mesh （DMesh）, diagonal Torus （DTorus） and XMesh networks, the SD-Torus network can achieve high performance with a lower network cost. It makes the SD-Torus network a powerful candidate for the high performance interconnection networks.展开更多
基金supported by the National Natural Science Foundation of China (60976020)
文摘In order to improve the network performance furthermore, a routing algorithm for 2D-Torus is investigated from the standpoint of load balance for virtual channels. The 2D-Torus network is divided into two virtual networks and each physical channel is split into three virtual channels. A novel virtual channel allocation policy and a routing algorithm are proposed, in which traffic load is distributed to those three virtual channels in a more load-balanced manner by introducing a random parameter. Simulations of the proposed algorithm are developed with a SystemC-based test bench. The results show that compared with the negative first for Torus networks （NF-T） algorithm, the proposed algorithm can achieve better performance in terms of network latency and throughput under different traffic patterns. It also shows that a routing algorithm with load balance for virtual channels can significantly improve the network performance furthermore.
基金supported by the National Natural Science Foundation of China (60976020)
文摘To improve the scalability and reduce the implementation complexity of Mesh and Mesh-like networks, the semi-diagonal Torus （SD-Torus） network, a regular and symmetrical intercormection network is proposed. The SD-Torus network is a combination of a typical 2D-Torus network with two extra diagonal links from northwest to southeast direction for each node. The topological properties of SD-Torus networks are discussed, and a load balanced routing algorithm for SD-Torus is presented. System-C based simulation result shows that, compared with diagonal Mesh （DMesh）, diagonal Torus （DTorus） and XMesh networks, the SD-Torus network can achieve high performance with a lower network cost. It makes the SD-Torus network a powerful candidate for the high performance interconnection networks.
