Engineering topics

Calahan, D. A.

Publications and source records attributed to Calahan, D. A..

2 records

NASA NTRS1985

Task granularity studies on a many-processor CRAY X-MP

A hybrid granularity model is proposed for general concurrent solution. It is applied to the triangular factorization of a dense matrix ranging in size from 4 to 1024. Concurrency is achieved at two levels: (1) with small (micro) task granularity and (2) with large (blocked) task granularity. Relevance to a many-processor CRAY X-MP is demonstrated by simulation.

Calahan, D. A.↗

NASA NTRS1978

A study of a multiple Cray-1 for fluid mechanics simulation

A study of the performance of the CRAY-1 and its architectural extensions was performed on 2-D and 3-D codes for the solution of the Navier-Stokes equations describing aerodynamic fluid flow. A standard 2-D code was benchmarked on the CRAY-1 and a preliminary version of a simulator of the CRAY-1 was programmed.

Calahan, D. A.↗