Accession Number : ADA323168

Title :   Dynamically Reconfigurable FPGA-Based Multiprocessing and Fault Tolerance.

Descriptive Note : Rept. for Aug 93-Jul 96,

Corporate Author : ROME LAB ROME NY

Personal Author(s) : Kwiat, Kevin A.

PDF Url : ADA323168

Report Date : FEB 1997

Pagination or Media Count : 214

Abstract : Processor replication is a straight-forward yet general method for contending with a range of failure modes in computing systems. Hardware-intensive solutions lower utilization by dedicating resources solely to fault tolerance. Alternately, software-intensive solutions, although flexible, require coping with slower speeds. Our objective in this research is to eliminate these problems and limitations by adding a multiprocessing capability so that the redundant hardware is used selectively. The architecture we propose is flexible in that processors do not have to be tightly synchronized, and it permits unconstrained combinations of fault-tolerant and multiprocessing applications to execute concurrently for efficient processor utilization. We capitalize on dynamically reconfigurable Field-Programmable Gate Array (FPGA) technology, which permits changing portions of its logic without disturbing the rest of the array. We demonstrate our tools and techniques for reconfiguring the FPGA, even while it operates, to create a virtual FPGA that is much larger than the physical FPGA. We have analyzed the proposed architecture and evaluated it with respect to performance, cost, scalability, reliability, and configurability. Based on all of these criteria, we have shown that our approach is superior to comparable designs.

Descriptors :   *MULTIPROCESSORS, *FAULT TOLERANT COMPUTING, ALGORITHMS, COMPUTERIZED SIMULATION, SOFTWARE ENGINEERING, DATA MANAGEMENT, COMPUTER ARCHITECTURE, INPUT OUTPUT PROCESSING, PARALLEL PROCESSING, INTEGRATED CIRCUITS, CONCURRENT ENGINEERING, LOGIC CIRCUITS, DYNAMIC PROGRAMMING, RELIABILITY(ELECTRONICS), DIGITAL COMPUTERS.

Subject Categories : Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE