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首页> 外文期刊>Journal of Electrical and Computer Engineering >Comparison of Memory Assignment Schemes for Switch Architectures with Shareable Parallel Memory Modules
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Comparison of Memory Assignment Schemes for Switch Architectures with Shareable Parallel Memory Modules

机译：具有共享并行存储器模块的交换机体系结构的存储器分配方案的比较

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Switching Architectures deploying shareable parallel memory modules are quite versatile in their ability to scale to higher capacity while retaining the advantage of sharing its entire memory resource among all input and output ports. The two main classes of such architectures, namely, the Shared Multibuffer-(SMB-) based switch and the Sliding-Window-(SW-) based packet switch, both deploy parallel memory modules that are physically separate but logically connected. Inspite of their similarity in regards to using shareable parallel memory modules, they differ in switching control and scheduling of packets to parallel memory modules. SMB switch uses centralized control whereas the SW switch uses a decentralized control for switching operations. In this paper, we present a new memory assignment scheme for the Sliding-Window (SW) switch for assigning packets to parallel memory modules that maximizes the parallel storage of packets to multiple memory modules. We compare the performance of a sliding-window switch deploying this new memory assignment scheme with that of an SMB switch architecture under conditions of identical traffic type and memory resources deployed. The simulation results show that the new memory assignment scheme for the sliding window switch maximizes parallel storage of packets input in a given switch cycle, and it does not require speed-up of memory modules. Furthermore, it provides a superior performance compared to that of the SMB switch under the constraints of fixed memory-bandwidth and memory resources.
机译：部署可共享并行内存模块的交换体系结构在扩展到更高容量的能力方面具有多种用途，同时保留了在所有输入和输出端口之间共享其全部内存资源的优势。这种体系结构的两个主要类别，即基于Shared Multibuffer（SMB）的交换机和基于Sliding-Window-（SW-）的分组交换机，都部署了物理上分离但逻辑上相连的并行内存模块。尽管在使用可共享的并行存储模块方面存在相似之处，但它们在将控制和调度数据包切换到并行存储模块方面有所不同。 SMB交换机使用集中控制，而SW交换机使用分散控制进行交换操作。在本文中，我们为滑动窗口（SW）开关提供了一种新的内存分配方案，用于将数据包分配给并行存储模块，从而最大程度地将数据包的并行存储分配给多个内存模块。我们将在部署相同流量类型和内存资源的条件下，将部署此新内存分配方案的滑动窗口交换机的性能与SMB交换机体系结构的性能进行比较。仿真结果表明，用于滑动窗口开关的新内存分配方案可在给定的开关周期内最大程度地并行存储输入的数据包，并且不需要加快内存模块的速度。此外，在固定的内存带宽和内存资源的约束下，与SMB交换机相比，它具有更高的性能。

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