CRAY-1 evaluation. Final report

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Abstract
The performance evaluation of the CRAY-1 computer was structured to determine if the CRAY-1 meets the minimum performance standards set forth by the Los Alamos Scientific Laboratory (LASL) and the Energy Research and Development Administration to qualify the machine for further consideration for procurement. The performance standards are divided into specific qualification criteria in three main areas: scalar performance, vector performance and reliability. It was impossible to convert large segments of the LASL computing workload to the CRAY-1 because programs to be run on the machine would require assembly language coding; therefore, for the scalar test, a sampling scheme was adopted that selected small computational kernels to be run on both the CDC 7600 and the CRAY-1. It was not possible to rigorously establish ''representative'' kernels for testing the vector performance of the CRAY-1. The vector computational speed of the CRAY-1 relative to the CDC 7600 is a function of both vector length and complexity of the vectorized arithmetic function. Relative performance of the CRAY-1 increases with vector length and complexity of operation. The reliability of the CRAY-1 was evaluated by establishing a reliability test code to run on the machine for long periods of time. The evaluation also investigatedmore » the CRAY-1 disk system performance and made other miscellaneous studies. The conclusion of the evaluation is that the CRAY-1 satisfies the threshold performance criteria in all categories. (RWR) « less

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