Coordinated Science Laboratory was formerly known as Control Systems LaboratoryNational Aeronautics and Space Administration / NASA NAG-1-61

Ahuja, Narendra

Choudhary, Alok N.

Patel, Janak H.

In part 1 architecture of NETRA is presented. A performance evaluation of NETRA using several common vision algorithms is also presented. Performance of algorithms when they are mapped on one cluster is described. It is shown that SIMD, MIMD, and systolic algorithms can be easily mapped onto processor clusters, and almost linear speedups are possible. For some algorithms, analytical performance results are compared with implementation performance results. It is observed that the analysis is very accurate. Performance analysis of parallel algorithms when mapped across clusters is presented. Mappings across clusters illustrate the importance and use of shared as well as distributed memory in achieving high performance. The parameters for evaluation are derived from the characteristics of the parallel algorithms, and these parameters are used to evaluate the alternative communication strategies in NETRA. Furthermore, the effect of communication interference from other processors in the system on the execution of an algorithm is studied. Using the analysis, performance of many algorithms with different characteristics is presented. It is observed that if communication speeds are matched with the computation speeds, good speedups are possible when algorithms are mapped across clusters

NASA Technical Reports Server

English

NETRA: A parallel architecture for integrated vision systems 2: Algorithms and performance evaluation

Illinois Digital Environment for Access to Learning and Scholarship Repository

NETRA - A Parallel Architecture for Integrated Vision Systems II: Algorithms and Performance Evaluation

IDEALS @ Illinois

https://www.ideals.illinois.edu/bitstream/handle/2142/74371/B43-CSG_118.pdf?sequence=2&isAllowed=y

NETRA - A Parallel Architecture for Integrated Vision Systems II: Algorithms and Performance Evaluation

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server

Illinois Digital Environment for Access to Learning and Scholarship Repository

IDEALS @ Illinois