Publications

Export 11 results:
Sort by: [ Author  (Asc)] Title Type Year
A B [C] D E F G H I J K L M N O P Q R S T U V W X Y Z   [Show ALL]
C
Cunha, J. C., P. D. Medeiros, J. M. Lourenço, V. Duarte, J. Vieira, B. Moscão, D. Pereira, and R. Vaz, "The DOTPAR Project: Towards a Framework Supporting Domain Oriented Tools for Parallel and Distributed Processing", Proceedings of the International Conference and Exhibition on High-Performance Computing and Networking (HPCN'98), London, UK, Springer-Verlag, pp. 952–954, 1998. Abstractdotpar98.pdf

We discuss the problem of building domain oriented environments by a composition of heterogeneous application components and tools. We describe several individual tools that support such environments, namely a distributed monitoring and control tool (DAMS), a process-based distributed debugger (PDBG) and a heterogeneous interconnection model (PHIS). We discuss our experience with the development of a Problem Oriented Environment in the domain of genetic algorithms, obtained by a composition of heterogeneous tools and application components.

Cunha, J. C., P. D. Medeiros, V. Duarte, J. Lourenço, and C. Gomes, "An Experience in Building a Parallel and Distributed Problem-Solving Environment", Proceedings of the International Conference on Parallel and Distributed Processing Techniques and Applications (PDPTA'99): CSREA Press, pp. 1804–1809, 1999. Abstractpdpta99.pdf

We describe our experimentation with the design and implementation of specific environments, consisting of heterogeneous computational, visualization, and control components. We illustrate the approach with the design of a problem–solving environment supporting the execution of genetic algorithms. We describe a prototype supporting parallel execution, visualization, and steering. A life cycle for the development of applications based on genetic algorithms is proposed.

Cunha, J. C., J. M. Lourenço, and T. Antão, "A Distributed Debugging Tool for a Parallel Software Engineering Environment", Proceedings of the 1st European Parallel Tools Meeting (EPTM'96), Paris, France, ONERA (French National Establishment for Aerospace Research), October, 1996. Abstracteptm96.pdf

We discuss issues in the design and implementation of a flexible debugging tool and its integration into a parallel software engineering environment.

Cunha, J. C., and J. M. Lourenço, "An Integrated Course on Parallel and Distributed Processing", SIGCSE Bull., vol. 30, New York, NY, USA, ACM, pp. 217–221, 1998. Abstractsigcse98.pdfWebsite

Most known teaching experiences focus on parallel computing courses only, but some teaching experiences on distributed computing courses have also been reported. In this paper we describe a course on Parallel and Distributed Processing that is taught at undergraduate level in the Computer Science degree of our University.This course presents an integrated approach concerning concurrency, parallelism, and distribution issues. It's a breadth-first course addressing a wide spectrum of abstractions: the theoretical component focus on the fundamental abstractions to model concurrent systems, including process cooperation schemes, concurrent programming models, data and control distribution, concurrency control and recovery in transactional systems, and parallel processing models; the practical component illustrates the design and implementation issues involved in selected topics such as a data and control distribution problem, a distributed transaction-based support system and a parallel algorithm.We also discuss how this approach has been contributing to prepare the student to further actions regarding research and development of concurrent, distributed, or parallel systems.

Cunha, J. C., J. M. Lourenço, and T. Antão, "An experiment in tool integration: the {DDBG} parallel and distributed debugger", J. Syst. Archit., vol. 45, New York, NY, USA, Elsevier North-Holland, Inc., pp. 897–907, may, 1999. Abstractjsa99.pdfWebsite

Most known teaching experiences focus on parallel computing courses only, but some teaching experiences on distributed computing courses have also been reported. In this paper we describe a course on Parallel and Distributed Processing that is taught at undergraduate level in the Computer Science degree of our University.This course presents an integrated approach concerning concurrency, parallelism, and distribution issues. It's a breadth-first course addressing a wide spectrum of abstractions: the theoretical component focus on the fundamental abstractions to model concurrent systems, including process cooperation schemes, concurrent programming models, data and control distribution, concurrency control and recovery in transactional systems, and parallel processing models; the practical component illustrates the design and implementation issues involved in selected topics such as a data and control distribution problem, a distributed transaction-based support system and a parallel algorithm.We also discuss how this approach has been contributing to prepare the student to further actions regarding research and development of concurrent, distributed, or parallel systems.

Cunha, J. C., J. M. Lourenço, and V. Duarte, "The DDBG distributed debugger", Parallel Program Development for Cluster Computing, Commack, NY, USA, Nova Science Publishers, Inc., pp. 279–290, 2001. Abstractcap13.pdf

n/a

Cunha, J. C., J. M. Lourenço, and T. Antão, "A Debugging Engine for a Parallel and Distributed Environment", Proceedings of the 1st Austrian-Hungarian Workshop on Distributed and Parallel Systems (DAPSYS'96), Wien, Austria, Hungarian Academy of Sciences, KFKI, pp. 111–118, 1996. Abstractdapsys96.pdf

This paper describes a debugging interface that has been developed for a parallel software engineering environment and that was developed on top of the PVM environment in the scope of the SEPP and HPCTI projects of the COPERNICUS Program. The main goal of this interface is to provide the basic debugging functionalities that are required by some components of that environment. We give special attention to the requirements posed by high-level tools of the environment, and to the need of providing a flexible debugging support layer that can be suitably adapted and extended. We present the system logical architecture and the interface specification of the debugging engine. We discuss its interfacing with other components of the environment, namely a graphical editor for the GRAPNEL visual parallel programming language, and a testing tool. We finally describe current work on the improvement of the debugging engine. Keywords: Debugging, monitoring, parallel processing, software tools.

Cunha, J. C., J. Lourenço, and V. Duarte, "Using DDBG to Support Testing and High-level Debugging Interfaces", Computers and Artificial Intelligence, vol. 17, no. 5, 1998. Abstractcaij98.pdfWebsite

This paper describes our experience with the design and implementation of a distributed debugger for C/PVM programs within the scope of the SEPP and HPCTI Copernicus projects. These projects aimed at the development of an integrated parallel software engineering environment based on a high-level graphical parallel programming model (GRAPNEL) and a set of associated tools supporting graphical edition, compilation, simulated and real parallel execution, testing, debugging, performance monitoring, mapping, and load balancing. We discuss how the development of the debugging tool was strongly influenced by the requirements posed by other tools in the environment, namely support for high-level graphical debugging of GRAPNEL programs, and support for the integration of static and dynamic analysis tools. We describe the functionalities of the DDBG debugger and its internal architecture, and discuss its integration with two separate tools in the SEPP/HPCTI environment: the GRED graphical editor for GRAPNEL programs, and the STEPS testing tool for C/PVM programs.

Cunha, J. C., J. M. Lourenço, J. Vieira, B. Moscão, and D. Pereira, "A Framework to Support Parallel and Distributed Debugging", Proceedings of the International Conference and Exhibition on High-Performance Computing and Networking (HPCN'98), London, UK, Springer-Verlag, pp. 708–717, 1998. Abstracthpcn98.pdf

We discuss debugging prototypes that can easily support new functionalities, depending on the requirements of high-level computational models, and allowing a coherent integration with other tools in a software engineering environment. Concerning the first aspect, we propose a framework that identifies two distinct levels of functionalities that should be supported by a parallel and distributed debugger using: a process and thread-level, and a coordination level concerning sets of processes or threads. An incremental approach is used to effectively develop prototypes that support both functionalities. Concerning the second aspect, we discuss how the interfacing with other tools has influenced the design of a process-level debugging interface (PDBG) and a distributed monitoring and control layer called (DAMS).

Cunha, J. C., J. M. Lourenço, and V. Duarte, "Debugging of parallel and distributed programs", Parallel Program Development for Cluster Computing, Commack, NY, USA, Nova Science Publishers, Inc., pp. 97–129, 2001. Abstractcap03.pdf

n/a

Cunha, J. C., J. M. Lourenço, and V. Duarte, "Tool Integration Issues for Parallel and Distributed Debugging", Proceedings of the 3rd SEIHPC Workshop, Braga, Portugal, University of Westminster, 1998. Abstractseihpc98.pdf

This paper describes our experience with the design and implementation of a distributed debugger for C/PVM programs within the scope of the SEPP and HPCTI Copernicus projects. These projects aimed at the development of an integrated parallel software engineering environment based on a high-level graphical parallel programming model (GRAPNEL) and a set of associated tools supporting graphical edition, compilation, simulated and real parallel execution, testing, debugging, performance monitoring, mapping, and load balancing. We discuss how the development of the debugging tool was strongly influenced by the requirements posed by other tools in the environment, namely support for high-level graphical debugging of GRAPNEL programs, and support for the integration of static and dynamic analysis tools. We describe the functionalities of the DDBG debugger and its internal architecture, and discuss its integration with two separate tools in the SEPP/HPCTI environment: the GRED graphical editor for GRAPNEL programs, and the STEPS testing tool for C/PVM programs.