Hardware support for controlled interaction of guaranteed and best-effort communication

J. Rexford, J. Dolter
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引用次数: 15

Abstract

Real-time communication typically consists of guaranteed packets that must satisfy their delivery deadlines and best-effort packets that can tolerate occasional deadline misses for improved average latency. This paper presents hardware techniques for supporting the coexistence of these two traffic classes in real-time point-to-point networks. A careful selection of routing and switching techniques, coupled with fine-grain arbitration between traffic classes, can allow network adapters to support the diverse performance requirements of best-effort and guaranteed communication. Cycle-level simulations of SPIDER (Scalable Point-to-point Interface DrivER), a network adapter for point-to-point distributed systems, demonstrate the utility of supporting multiple low-level communication policies for different classes of traffic.<>
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硬件支持对保证和尽力通信的受控交互
实时通信通常由必须满足其交付截止日期的有保证的数据包和可以容忍偶尔错过截止日期以改进平均延迟的“尽力”数据包组成。本文提出了在实时点对点网络中支持这两类流量共存的硬件技术。仔细选择路由和交换技术,再加上流量类之间的细粒度仲裁,可以使网络适配器支持各种性能需求,以实现最佳努力和有保证的通信。针对点对点分布式系统的网络适配器SPIDER(可伸缩点对点接口驱动程序)的循环级模拟,演示了为不同类别的流量支持多种低级通信策略的实用性
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