Now showing items 1-17 of 17

    • A dynamic periodicity detector: application to speedup computation 

      Freitag, Fèlix; Corbalán González, Julita; Labarta Mancho, Jesús José (IEEE, 2001-04)
      Conference report
      Open Access
      We propose a dynamic periodicity detector (DPD) for the estimation of periodicities in data series obtained from the execution of applications. We analyze the algorithm used by the periodicity detector and its performance ...
    • A proposal to develop and assess professional skills in Engineering Final Year Projects 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera (Tempus Publications, 2018-03)
      Article
      Restricted access - publisher's policy
      In this paper we discuss the result of piloting a methodology for Engineering Final Year Projects (FYP) assessment that takes into consideration professional skills acquisition. The FYP is structured around three milestones; ...
    • Balancing HPC applications through smart allocation of resources in MT processors 

      Boneti, Carlos; Gioiosa, Roberto; Cazorla, Francisco; Corbalán González, Julita; Labarta Mancho, Jesús José; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2008)
      Conference report
      Open Access
      Many studies have shown that load imbalancing causes significant performance degradation in High Performance Computing (HPC) applications. Nowadays, Multi-Threaded (MT1) processors are widely used in HPC for their good ...
    • BSLD threshold driven parallel job scheduling for energy efficient HPC centers 

      Etinski, Maja; Corbalán González, Julita; Labarta Mancho, Jesús José; Valero Cortés, Mateo (2009)
      External research report
      Open Access
      Recently, power awareness in high performance computing (HPC) community has increased significantly. While CPU power reduction of HPC applications using Dynamic Voltage Frequency Scaling (DVFS) has been explored thoroughly, ...
    • BSLD threshold driven power management policy for HPC centers 

      Etinski, Maja; Corbalán González, Julita; Labarta Mancho, Jesús José; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      In this paper, we propose a power-aware parallel job scheduler assuming DVFS enabled clusters. A CPU frequency assignment algorithm is integrated into the well established EASY backfilling job scheduling policy. Running a ...
    • Coordinated Scheduling and Dynamic Performance Analysis in Multiprocessors Systems 

      Corbalán González, Julita (Universitat Politècnica de Catalunya, 2002-07-05)
      Doctoral thesis
      Open Access
      El rendimiento de los actuales sistemas multiprocesador de memoria compartida depende tanto de la utilización eficiente de todos los componentes del sistema (procesadores, memoria, etc), como de las características del ...
    • DJSB: Dynamic Job Scheduling Benchmark 

      López Herrero, Víctor; Jokanovic, Ana; D'Amico, Marco; Garcia Gasulla, Marta; Sirvent Pardell, Raül; Corbalán González, Julita (Springer, 2018-02-28)
      Conference lecture
      Open Access
      High-performance computing (HPC) systems are very big and powerful systems, with the main goal of achieving maximum performance of parallel jobs. Many dynamic factors influence the performance which makes this goal a ...
    • DROM: Enabling Efficient and Effortless Malleability for Resource Managers 

      D'Amico, Marco; Garcia Gasulla, Marta; López, Victor; Jokanovic, Ana; Sirvent, Raül; Corbalán González, Julita (Association for Computing Machinery (ACM), 2018-08-13)
      Conference lecture
      Open Access
      In the design of future HPC systems, research in resource management is showing an increasing interest in a more dynamic control of the available resources. It has been proven that enabling the jobs to change the number ...
    • Dynamic load balancing for hybrid applications 

      Garcia Gasulla, Marta; Corbalán González, Julita; Labarta Mancho, Jesús José (Barcelona Supercomputing Center, 2015-05-05)
      Conference report
      Open Access
      DLB relies on the usage of hybrid programming models and exploits the malleability of the second level of parallelism to redistribute computation power across processes.
    • Evaluación del Trabajo de Fin de Grado 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Llinàs Audet, Francisco Javier; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera (Universitat Jaume I. Escola Superior de Tecnologia i Ciències Experimentals, 2013-07-10)
      Conference report
      Open Access
      Los Proyectos de Fin de Carrera (PFC) se han evaluado tradicionalmente a partir de una memoria y de una presentación pública. Esta evaluación, en general, la realiza un tribunal formado por varios profesores, que juzga ...
    • Evaluating SLURM simulator with real-machine SLURM and vice versa 

      Jokanovic, Ana; D'Amico, Marco; Corbalán González, Julita (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      Having a precise and a fast job scheduler model that resembles the real-machine job scheduling software behavior is extremely important in the field of job scheduling. The idea behind SLURM simulator is preserving the ...
    • Evaluation and assessment of professional skills in the Final Year Project 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Llinàs Audet, Francisco Javier; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera; Alier Forment, Marc; Cabré Garcia, José M.; López Álvarez, David (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Open Access
      In this paper, we present a methodology for Final Year Project (FYP) monitoring and assessment that considers the inclusion of the professional skills required in the particular engineering degree. This proper monitoring ...
    • Evaluation of OpenMP task scheduling strategies 

      Duran González, Alejandro; Corbalán González, Julita; Ayguadé Parra, Eduard (2008-05)
      Article
      Restricted access - publisher's policy
      OpenMP is in the process of adding a tasking model that allows the programmer to specify independent units of work, called tasks, but does not specify how the scheduling of these tasks should be done (although it imposes ...
    • Holistic slowdown driven scheduling and resource management for malleable jobs 

      D'Amico, Marco; Jokanovic, Ana; Corbalán González, Julita (Association for Computing Machinery (ACM), 2019)
      Conference report
      Open Access
      In job scheduling, the concept of malleability has been explored since many years ago. Research shows that malleability improves system performance, but its utilization in HPC never became widespread. The causes are the ...
    • Optimizing job performance under a given power constraint in HPC centers 

      Etinski, Maja; Corbalán González, Julita; Labarta Mancho, Jesús José; Valero Cortés, Mateo (2010)
      Conference report
      Open Access
      Never-ending striving for performance has resulted in a tremendous increase in power consumption of HPC centers. Power budgeting has become very important from several reasons such as reliability, operating costs and limited ...
    • Power-aware load balancing of large scale MPI applications 

      Etinski, Maja; Corbalán González, Julita; Labarta Mancho, Jesús José; Valero Cortés, Mateo; Veidenbaum, Alex (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Conference report
      Open Access
      Power consumption is a very important issue for HPC community, both at the level of one application or at the level of whole workload. Load imbalance of a MPI application can be exploited to save CPU energy without penalizing ...
    • XtreemOS application execution management: a scalable approach 

      Nou Castell, Ramon; Giralt Celiméndiz, Jacobo; Corbalán González, Julita; Tejedor Saavedra, Enric; Fitó, Josep Oriol; Perez, Josep Maria; Cortés, Toni (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Conference report
      Open Access
      Designing a job management system for the Grid is a non-trivial task. While a complex middleware can give a lot of features, it often implies sacrificing performance. Such performance loss is especially noticeable for ...