An experimental investigation of an on-chip interconnect fabric using a multiprocessor system-on-chip architecture

Loading...
Thumbnail Image
Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
University of Alabama Libraries
Abstract

Recent advances in technology have made it possible to integrate systems with CPUs, memory units, buses, specialized logic, other digital functions and their interconnections on a single chip, giving rise to the concept of system-on-chip (SoC) architectures. In order to keep up with the incoming data rates of modern applications and to handle concurrent real-world events in real-time, multiprocessor SoC implementations have become necessary. As more processors and peripherals are being integrated on a single chip, providing an efficient and a functionally optimum interconnection has become a major design challenge. The traditional shared-bus-based approach is quite popular in SoC architectures as it is simple, well-understood and easy to implement. However, its scalability is limited, since the bus invariably becomes a bottleneck as more processors are added. Switch-based networks can overcome this bottleneck while providing true concurrency and task-level parallelism, resulting in a higher throughput. However, switch-based networks are complex and consume considerable amounts of logic resources on a chip, thus increasing the cost. Hence, the choice of switch-based networks over a bus-based architecture is an important design consideration in SoC architectures. This choice hinges on the trade-off between design simplicity and low cost vs. high communication bandwidth. This research investigates the logic resource utilization of a switch-based on-chip interconnect to analyze its scalability for multiprocessor systems. It also experimentally demonstrates the true concurrency provided by the interconnect, investigates the arbitration mechanism used, and suggests the use of a real-time operating system (RTOS) as a more effective way of managing on-chip interconnections.

Description
Electronic Thesis or Dissertation
Keywords
Computer engineering, Electrical engineering
Citation