• Título:  EXTENDING THE USABILITY OF A DYNAMIC TUNING ENVIRONMENT
• Autor:  CAYMES SCUTARI , PAOLA GUADALUPE
• Universidad:  Universidad Autónoma de Barcelona
• Departamento:  Centro de Visión por Computador (CVC)
• Fecha de Lectura:  19/07/2007
• Programa de doctorado:  DEPARTAMENTO DE ARQUITECTURA DE COMPUTADORES Y SISTEMAS OPERATIVOS
• Dirección: 
  • SIKORA, ANNA BARBARA (DIRECTOR)
  • MARGALEF BURRULL, TOMAS MANUEL (DIRECTOR)
• Tribunal: 
  • LUQUE FADON, EMILIO (PRESIDENTE)
  • RODRÍGUEZ LEÓN, CASIANO (SECRETARIO)
  • GURD, JOHN (VOCAL)
  • Cunha, Jose (VOCAL)
  • HERNANDEZ GARCIA, VICENTE (VOCAL)
• Descriptores: 
  • CIENCIAS TECNOLOGICAS
  • ORDENADORES DIGITALES
  • ARQUITECTURA DE ORDENADORES
  • TECNOLOGIA DE LOS ORDENADORES
• Localización:  BIBLIOTECA DE COMUNICACIONS I HEMEROTECA GENERAL
• Resumen:
  In the last years, computing performance demand has been in increase. This necessity appeared specially in different scientific areas that have to solve complex problems. Thus, Biology, Physics and Chemistry are becoming the main producers and users of applications with high performance computing requirements. There are many applications that differ from the functional point of view, such as the determining of the human genome, the simulation of the universe, nature models study, etc. However, in general the data set size and the complexity of the operations over them require the use of very powerful systems in order to solve the problem as fast as possible and using the resources in an efficient way. Thus, the increasing necessity for high performance systems/computing has been directing the attention of the scientific field towards the parallel/distributed paradigm. The development of parallel applications has to follow a specific manner to allow for their execution in a parallel system. In addition, once the application has been implemented, it has to be systematically tested in order to guarantee its correctness. Following that, the application has to be adjusted to ensure that no bottlenecks exist in the execution. The optimization process, so-called tuning process, is the process followed in order to adapt and improve the behaviour of the applications by modifying their critical parameters. It includes several and successive phases. Firstly, during a monitoring phase the information about the behaviour of the application is captured. Next, the information is analyzed, by looking for bottlenecks, deducing their causes and trying to determine the adequate actions to eliminate them. Finally, appropriate changes have to be applied to the code to solve the problems and improve the performance. As a consequence, the developers are forced to know very well the application, the different involved software layers and the behaviour of the distributed system. All these