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Master's Dissertation
DOI
https://doi.org/10.11606/D.76.2008.tde-24042008-114210
Document
Author
Full name
Aparecido Luciano Breviglieri Joioso
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2008
Supervisor
Committee
Sipahi, Guilherme Matos (President)
Ferreira, Gelio Mendes
Travieso, Gonzalo
Title in Portuguese
Aplicação de computação em grade a simulações computacionais de estruturas semicondutoras
Keywords in Portuguese
Globus toolkit
Grid
MPICH-G2
ScaLAPACK
Simulações computacionais
Abstract in Portuguese
Neste trabalho foi avaliada a utilização da grid computing em aspectos importantes para simulações em Física Computacional. Em particular, para aplicações de diagonalização de matrizes de grande porte. O projeto de código aberto Globus Toolkit foi utilizado para comparar o desempenho da biblioteca paralela de álgebra linear ScaLAPACK em duas versões baseadas na biblioteca de passagem de mensagens, a versão tradicional MPICH e a versão desenvolvida para um ambiente de grid computing MPICH-G2. Várias simulações com diagonalização de matrizes complexas de diversos tamanhos foram realizadas. Para um sistema com uma matriz de tamanho 8000 x 8000 distribuída em 8 processos, nos nós de 64 bits foi alcançado um speedup de 7,71 com o MPICH-G2. Este speedup é muito próximo do ideal que, neste caso, seria igual a 8. Foi constatado também que a arquitetura de 64 bits tem melhor desempenho que a de 32 bits nas simulações executadas para este tipo de aplicação
Title in English
Applying grid computing on computational simulations of semiconductor structures
Keywords in English
Computational simulations
Globus toolkit
Grid
MPICH-G2
ScaLAPACK
Abstract in English
This work evaluates the use of grid computing in essential issues related to Computational Physics simulations. In particular, for applications with large scale matrix diagonalization. The Globus Toolkit open source project was used to compare the performance of the linear algebra parallel library ScaLAPACK in two different versions based on the message passing library, the traditional version MPICH and its version developed for a grid computing environment MPICH-G2. Several simulations within large scale diagonalization of complex matrix were performed. A 7.71 speedup was reached with the MPICH-G2 for a 8000 x 8000 size matrix distributed in 8 processes on 64 bits nodes. This was very close to the ideal speedup, that would be in this case, 8. It was also evidenced that the 64 bits architecture has better performance than the 32 bits on the performed simulations for this kind of application.
 
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Publishing Date
2008-04-25
 
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