Now showing items 1-19 of 19

    • A cost-efficient QoS-aware analytical model of future software content delivery networks 

      Otero Calviño, Beatriz; Rodríguez Luna, Eva; Rojas, Otilio; Verdú Mulà, Javier; Costa Prats, Juan José; Pajuelo González, Manuel Alejandro; Canal Corretger, Ramon (2021-07)
      Article
      Open Access
      Freelance, part-time, work-at-home, and other flexible jobs are changing the concept of workplace, and bringing information and content exchange problems to companies. Geographically spread corporations may use remote ...
    • An abstraction methodology for the evaluation of multi-core multi-threaded architectures 

      Zilan, Ruken; Verdú Mulà, Javier; García Vidal, Jorge; Nemirovsky, Mario; Milito, Rodolfo; Valero Cortés, Mateo (IEEE Computer Society Publications, 2011)
      Conference report
      Restricted access - publisher's policy
      As the evolution of multi-core multi-threaded processors continues, the complexity demanded to perform an extensive trade-off analysis, increases proportionally. Cycle-accurate or trace-driven simulators are too slow to ...
    • Analysis and architectural support for parallel stateful packet processing 

      Verdú Mulà, Javier (Universitat Politècnica de Catalunya, 2008-07-09)
      Doctoral thesis
      Open Access
      The evolution of network services is closely related to the network technology trend. Originally network nodes forwarded packets from a source to a destination in the network by executing lightweight packet processing, or ...
    • Characterizing the resource-sharing levels of the UltraSparc T2 processor 

      Cakarevic, Vladimir; Radojkovic, Petar; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (Association for Computing Machinery (ACM), 2009)
      Conference report
      Restricted access - publisher's policy
      Thread level parallelism (TLP) has become a popular trend to improve processor performance, overcoming the limitations of extracting instruction level parallelism. Each TLP paradigm, such as Simultaneous Multithreading or ...
    • Dynamic web worker pool management for highly parallel javascript web applications 

      Verdú Mulà, Javier; Costa Prats, Juan José; Pajuelo González, Manuel Alejandro (2016-09-10)
      Article
      Open Access
      JavaScript web applications are improving performance mainly thanks to the inclusion of new standards by HTML5. Among others, web workers API allows multithreaded JavaScript web apps to exploit parallel processors. However, ...
    • Internet traffic and the behavior of processing workloads 

      Zilan, Ruken; Verdú Mulà, Javier; García Vidal, Jorge; Nemirovsky, Mario; Valero Cortés, Mateo (2009-06)
      Conference report
      Open Access
      Nowadays, the evolution of network services provided at the edge of Internet increases the requirements of network applications. Such applications result in complexities thus, the processors need to execute more complex ...
    • Mapa conceptual global como herramienta para la visión de conjunto de un sistema operativo 

      Verdú Mulà, Javier; López Álvarez, David; Pajuelo González, Manuel Alejandro (2009-06-15T12:03:04Z)
      Conference report
      Open Access
      Numerosas asignaturas están formadas por un temario que está totalmente interrelacionado. Al final del curso los estudiantes deberían haber adquirido los conocimientos de cada tema pero, más importante aún, deberían saber ...
    • Measuring operating system overhead on CMT processors 

      Radojkovic, Petar; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Gioiosa, Roberto; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (IEEE Computer Society Publications, 2008)
      Conference report
      Open Access
      Numerous studies have shown that Operating System (OS) noise is one of the reasons for significant performance degradation in clustered architectures. Although many studies examine the OS noise for High Performance Computing ...
    • Measuring operating system overhead on Sun UltraSparc T1 processor 

      Radojkovic, Petar; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Gioiosa, Roberto; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (2009-06)
      Conference report
      Open Access
      Numerous studies have shown that Operating System (OS) noise is one of the reasons for significant performance degradation in clustered architectures. Although many studies examine the OS noise for High Performance Computing, ...
    • Overhead of the spin-lock loop in UltraSPARC T2 

      Cakarevic, Vladimir; Radojkovic, Petar; Cazorla Almeida, Francisco Javier; Gioiosa, Roberto; Nemirovsky, Mario; Valero Cortés, Mateo; Pajuelo González, Manuel Alejandro; Verdú Mulà, Javier (2008-06-04)
      Conference report
      Open Access
      Spin locks are task synchronization mechanism used to provide mutual exclusion to shared software resources. Spin locks have a good performance in several situations over other synchronization mechanisms, i.e., when on ...
    • Performance analysis of a new packet trace compressor based on TCP flow clustering 

      Holanda Filho, Raimir; Verdú Mulà, Javier; García Vidal, Jorge; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 2005)
      Conference report
      Open Access
      In this paper we study the properties of a new packet trace compression method based on clustering of TCP flows. With our proposed method, the compression ratio that we achieve is around 3%, reducing the file size, for ...
    • Performance scalability analysis of JavaScript applications with web workers 

      Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro (2016-12)
      Article
      Open Access
      Web applications are getting closer to the performance of native applications taking advantage of new standard–based technologies. The recent HTML5 standard includes, among others, the Web Workers API that allows ...
    • Platform-agnostic steal-time measurement in a guest operating system 

      Verdú Mulà, Javier; Costa Prats, Juan José; Otero Calviño, Beatriz; Rodríguez Luna, Eva; Pajuelo González, Manuel Alejandro; Canal Corretger, Ramon (2018-10)
      External research report
      Open Access
      Steal time is a key performance metric for applications executed in a virtualized environment. Steal time measures the amount of time the processor is preempted by code outside the virtualized environment. This, in turn, ...
    • The problem of evaluating CPU-GPU systems with 3d visualization applications 

      Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Valero Cortés, Mateo (2012-12)
      Article
      Restricted access - publisher's policy
      Complex, computationally demanding 3D visualization applications can be used as benchmarks to evaluate CPU-GPU systems. However, because those applications are time dependent, their execution is not deterministic. Thus, ...
    • Thread assignment in multicore/multithreaded processors: A statistical approach 

      Radojkovic, Petar; Carpenter, Paul M.; Moreto Planas, Miquel; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (2016-01-01)
      Article
      Open Access
      The introduction of multicore/multithreaded processors, comprised of a large number of hardware contexts (virtual CPUs) that share resources at multiple levels, has made process scheduling, in particular assignment of ...
    • Thread assignment of multithreaded network applications in multicore/multithreaded processors 

      Radojkovic, Petar; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (2013-12)
      Article
      Open Access
      The introduction of multithreaded processors comprised of a large number of cores with many shared resources makes thread scheduling, and in particular optimal assignment of running threads to processor hardware contexts ...
    • Thread to strand binding of parallel network applications in massive multi-threaded systems 

      Radojkovic, Petar; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (2010-05)
      Article
      Restricted access - publisher's policy
      In processors with several levels of hardware resource sharing, like CMPs in which each core is an SMT, the scheduling process becomes more complex than in processors with a single level of resource sharing, such as pure-SMT ...
    • Thread to strand binding of parallel network applications in massive multi-threaded systems 

      Radojkovic, Petar; Cakarevic, Vladimir; Verdú Mulà, Javier; Pajuelo González, Manuel Alejandro; Cazorla Almeida, Francisco Javier; Nemirovsky, Mario; Valero Cortés, Mateo (ACM Press. Association for Computing Machinery, 2010-01)
      Conference report
      Restricted access - publisher's policy
      In processors with several levels of hardware resource sharing, like CMPs in which each core is an SMT, the scheduling process becomes more complex than in processors with a single level of resource sharing, such as pure-SMT ...
    • Understanding the overhead of the spin-lock loop in CMT architectures 

      Cakarevic, Vladimir; Radojkovic, Petar; Verdú Mulà, Javier; Cazorla Almeida, Francisco Javier; Gioiosa, Roberto; Pajuelo González, Manuel Alejandro; Nemirovsky, Mario; Valero Cortés, Mateo (2008)
      Conference report
      Open Access
      Spin locks are a synchronization mechanisms used to provide mutual exclusion to shared software resources. Spin locks are used over other synchronization mechanisms in several situations, like when the average waiting ...