HPC4EAS (High Performance Computing for Efficient Applications and Simulation Research Group)

Our main investigation objectives will address the research and technology challenges of meeting the requirements of next generation Cloud Computing architectures for the efficient execution of compute and data-intensive High Performance Computing services. We have defined four strategic research objectives that correspond with the four architectural layers of HPC for Efficient Applications & Simulation (hpc4eas): Performance and Efficiency in the use of HPC resources, User Availability of HPC Resources, Design and Optimization of HPC Systems for Specific "Workloads" (application-specific domains) and Social Projection Applications. The results of the these research lines will offer a considerable improvement in resource utilization, energy efficiency and cost of current scientific and business infrastructures; will support new provisioning models for computing centres to offer on-demand capacity in order to scale user’s environment and accommodate ongoing growth, and will establish the principals of porting HPC applications to clusters and Clouds.

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2020-11-27
07:56
1 p, 209.3 KB Digital transformation of the municipal official food controls of restaurants in Barcelona / Grau-Noguer, Eduard (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments) ; Portaña, Samuel (Agència de Salut Pública de Barcelona) ; Rodríguez-Sanz, Maica (Agència de Salut Pública de Barcelona) ; Suppi Boldrito, Remo (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Serratosa, Jordi (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Barcelona Public Health Agency implements official food safety controls in Barcelona city. Data-driven controls are crucial to guarantee their effectiveness, consistency, fairness and quality. Historically, data and information have been collected, analysed and interpreted analogically, which may be influenced by individual- or experience-factors. [...]
2020
EFFoST International Conference 2020. Online, 34è : 2020  
2020-06-03
06:24
14 p, 1.1 MB How to use mixed precision in ocean models : Exploring a potential reduction of numerical precision in NEMO 4.0 and ROMS 3.6 / Tintó Prims, Oriol (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Acosta, Mario C. (Centro Nacional de Supercomputación. Barcelona Supercomputing Center) ; Moore, Andrew M. (University of California. Ocean Sciences Department (USA)) ; Castrillo, Miguel (Centro Nacional de Supercomputación. Barcelona Supercomputing Center) ; Serradell, Kim (Centro Nacional de Supercomputación. Barcelona Supercomputing Center) ; Cortés Fité, Ana (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Doblas-Reyes, Francisco J. (Centro Nacional de Supercomputación. Barcelona Supercomputing Center)
Mixed-precision approaches can provide substantial speed-ups for both computing- and memory-bound codes with little effort. Most scientific codes have overengineered the numerical precision, leading to a situation in which models are using more resources than required without knowing where they are required and where they are not. [...]
2019 - 10.5194/gmd-12-3135-2019
Geoscientific Model Development, Vol. 12, Issue 7 (July 2019) , p. 3135-3148  
2019-11-18
22:11
13 p, 7.6 MB Prediction of energy consumption by checkpoint/restart in HPC / Morán, Marina (Universidad Nacional del Comahue. Facultad de Informática) ; Balladini, Javier (Universidad Nacional del Comahue. Facultad de Informática) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
The fault tolerance method most used today in high-performance computing (HPC) is coordinated checkpointing. This, like any other fault tolerance method, adds additional energy consumption to that of the execution of the application. [...]
2019 - 10.1109/ACCESS.2019.2919970
IEEE Access, Vol. 7 (2019) , p. 71791-71803  
2017-07-24
22:35
12 p, 1.8 MB Evaluation of response capacity to patient attention demand in an Emergency Department / Bruballa Vilas, Eva (Universitat Autònoma de Barcelona. Escola d'Enginyeria) ; Wong, Álvaro (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Epelde Gonzalo, Francisco (Parc Taulí Hospital Universitari. Institut d'Investigació i Innovació Parc Taulí (I3PT))
The progressive growth of aging, increased life expectancy and a greater number of chronic diseases contribute significantly to the growing demand of emergency medical care, and thus, on saturation of Emergency Departments. [...]
2017
International journal on advances in systems and measurements, Vol. 10, issue 1-2 (2017) , p. 11-22  
2017-06-19
22:35
10 p, 1.2 MB Support managing population aging stress of emergency departments in a computational way / Liu, Zhengchun ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Epelde, Francisco (Parc Taulí Hospital Universitari. Institut d'Investigació i Innovació Parc Taulí (I3PT)) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
Old people usually have more complex health problems and use healthcare services more frequently than young people. It is obvious that the increasing old people both in number and proportion will challenge the emergency departments (ED). [...]
2017 - 10.1016/j.procs.2017.05.147
Procedia computer science, Vol. 108 (2017) , p. 149-158  
2017-06-19
22:35
10 p, 1.6 MB Virtual Clinical Trials : A tool for the Study of Transmission of Nosocomial Infections / Jaramillo, Cecilia ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Epelde, Francisco (Parc Taulí Hospital Universitari. Institut d'Investigació i Innovació Parc Taulí (I3PT)) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
A clinical trial is a study designed to demonstrate the efficacy and safety of a drug, procedure, medical device, or diagnostic test. Since clinical trials involve research in humans, they must be carefully designed and must comply strictly with a set of ethical conditions. [...]
2017 - 10.1016/j.procs.2017.05.245
Procedia computer science, Vol. 108 (2017) , p. 109-118  
2017-03-13
22:37
45 p, 1.8 MB Hybrid Message Pessimistic Logging : improving current pessimistic message logging protocols / Meyer, Hugo Daniel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Muresano Cáceres, Ronal Roberto (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Castro León, Marcela (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
With the growing scale of HPC applications, there has been an increase in the number of interruptions as a consequence of hardware failures. The remarkable decrease of Mean Time Between Failures (MTBF) in current systems encourages the research of suitable fault tolerance solutions. [...]
2017 - 10.1016/j.jpdc.2017.02.003
Journal of parallel and distributed computing, Vol. 104 (2017) , p. 206-222  
2016-12-23
22:35
11 p, 1.2 MB Using AWS EC2 as Test-Bed infrastructure in the I/O system configuration for HPC applications / Gómez Sánchez, Pilar (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Encinas, Diego (Universidad Nacional de la Plata. Instituto de Investigación en Informática) ; Panadero Martínez, Javier (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Bezerra, Aprigio (Universidade Estadual de Santa Cruz. Departamento de Ciências Exatas e Tecnológicas) ; Méndez, Sandra (Leibniz Supercomputing Centre) ; Naiouf, Marcelo (Universidad Nacional de la Plata. Instituto de Investigación en Informática) ; De Giusti, Armando (Universidad Nacional de la Plata. Instituto de Investigación en Informática) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
In recent years, the use of public cloud platforms as infrastructure has been gaining popularity in many scientific areas and High Performance Computing (HPC) is no exception. These kinds of platforms can be used by system administrators as Test-Bed systems for evaluating and detecting performance inefficiencies in the I/O subsystem, and for taking decisions about the configuration parameters that have influence on the performance of an application, without compromising the performance of the production HPC system. [...]
2016
Journal of computer science & technology, Vol. 16, Issue 2 (Nov. 2016) , p. 65-75  
2016-07-11
22:35
9 p, 1.1 MB Predicting robustness against transient faults of MPI based programs / Dias Lima Gramacho, João Artur (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Wong, Álvaro (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
The evaluation of a program's behaviour in the presence of transient faults is often a very time consuming work. In order to achieve significant data, thousands of executions are required and each execution will have the significant overhead of the fault injection environment. [...]
2016 - 10.1504/IJCSE.2016.076218
International journal of computational science and engineering, Vol. 12, Issue 2/3 (2016) , p. 155-165  
2016-07-11
22:35
25 p, 2.3 MB An approach for an efficient execution of SPMD applications on Multi-core environments / Muresano Cáceres, Ronal Roberto (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Meyer, Hugo Daniel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Rexachs del Rosario, Dolores Isabel (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius) ; Luque, Emilio (Universitat Autònoma de Barcelona. Departament d'Arquitectura de Computadors i Sistemes Operatius)
Executing traditional Message Passing Interface (MPI) applications on multi-core cluster balancing speed and computational efficiency is a difficult task that parallel programmers have to deal with. For this reason, communications on multi-core clusters ought to be handled carefully in order to improve performance metrics such as efficiency, speedup, execution time and scalability. [...]
2017 - 10.1016/j.future.2016.06.016
Future generation computer systems, Vol. 66 (Gener 2017) , p. 11-26