Evaluation of Bus Based Interconnect Mechanisms in Clustered VLIW Architectures
Evaluation of Bus Based Interconnect Mechanisms in Clustered VLIW Architectures
复制标题
集群 VLIW 架构中基于总线的互连机制的评估
DOI：
10.1007/s10766-007-0045-2
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Anshul Kumar
中科院分区：
文献类型：
--
作者：
Anup Gangwar;Mahesh Balakrishnan;P. Panda;Anshul Kumar
借助新的复杂编译器技术，可以有效地调度远程指令。因此，应用程序中可利用的指令级并行性 (ILP) 数量大幅增加。然而，由于集中式寄存器文件比功能单元（FU）慢得多，单片寄存器文件VLIW架构存在可扩展性问题。集群式 VLIW 架构以及连接到任何 RF 的 FU 子集为解决这一问题提供了一个有吸引力的解决方案。最近对各种簇间互连机制的研究表明，与研究最多的 RF 到 RF 类型互连相比，性能（周期数）有了显着的提高。然而，这些研究仅比较了射频到射频互连设计空间中的一两个设计点。在本文中，我们扩展了之前报告的工作。我们考虑多周期总线和流水线总线。为了获得真实的总线延迟，我们综合了各种架构并计算了布局后时钟周期。结果表明，虽然互连面积的变化不到 10%，但基于总线的架构速度却慢了 400%。此外，无论是多周期或流水线总线还是增加总线数量本身都无法实现与点对点类型互连相当的性能。
With new sophisticated compiler technology, it is possible to schedule distant instructions efficiently. As a consequence, the amount of exploitable instruction level parallelism (ILP) in applications has gone up considerably. However, monolithic register file VLIW architectures present scalability problems due to a centralized register file which is far slower than the functional units (FU). Clustered VLIW architectures, with a subset of FUs connected to any RF provide an attractive solution to address this issue. Recent studies with a wide variety of inter-cluster interconnection mechanisms have reported substantial gains in performance (number of cycles) over the most studied RF-to-RF type interconnections. However, these studies have compared only one or two design points in the RF-to-RF interconnects design space. In this paper, we extend the previous reported work. We consider both multi-cycle and pipelined buses. To obtain realistic bus latencies, we synthesized the various architectures and calculated post-layout clock periods. The results demonstrate that while there is less that 10% variation in interconnect area, the bus based architectures are slower by as much as 400%. Also, neither multi-cycle or pipelined buses nor increasing the number of buses itself is able to achieve performance comparable to point-to-point type interconnects.
DOI：
10.1109/mc.2004.1319252
发表时间：
1999-01
期刊：
Journal of Hydrology: Regional Studies
影响因子：
--
作者：
通讯作者：
--