Title :
Analysis of memory and time savings using EC/DSIM
Author :
Hermannsson, Gudjon ; Li, Ai ; Wittie, Larry
Author_Institution :
Dept. of Comput. Sci., State Univ. of New York, Stony Brook, NY, USA
fDate :
31 Jan-2 Feb 1994
Abstract :
This paper introduces the EC frontend and DSIM simulator. Given a parallel program, they determine its execution time on huge networks of computers. EC extracts task step needs. DSIM predicts completion times rather than simulating each program step. This paper contains analyses of the memory savings and the execution time savings for simulations of one to 2,800 computers running parallel Gaussian elimination and fast Fourier transform. The time savings are 20% (two days) for fifty runs of Gaussian reduction of a 400x401 matrix to solve 400 linear equations. Memory needs are reduced 99% (637 MBytes) per simulation run. The memory savings allow simulation of parallel programs running on thousands of processors. These huge network sizes are impractical with step-by-step simulations
Keywords :
computational complexity; parallel programming; system monitoring; virtual machines; EC frontend; EC/DSIM; completion times; fast Fourier transform; linear equations; memory savings; parallel Gaussian elimination; parallel program; task step needs; time savings; Communication system control; Computational modeling; Computer architecture; Computer networks; Computer science; Computer simulation; Concurrent computing; Control systems; Physics computing; Predictive models;
Conference_Titel :
Modeling, Analysis, and Simulation of Computer and Telecommunication Systems, 1994., MASCOTS '94., Proceedings of the Second International Workshop on
Conference_Location :
Durham, NC
Print_ISBN :
0-8186-5292-6
DOI :
10.1109/MASCOT.1994.284421
