Exploració per autor "Torres Viñals, Jordi"
Ara es mostren els items 58-77 de 103
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Improving accuracy and speeding up document image classification through parallel systems
Ferrando Monsonís, Javier; Domínguez, Juan Luis; Torres Viñals, Jordi; García Fuentes, Raul; García Doménech, David; Garrido Miñambres, Daniel; Cortada, Jordi; Valero Cortés, Mateo (Springer, 2020)
Text en actes de congrés
Accés obertThis paper presents a study showing the benefits of the EfficientNet models compared with heavier Convolutional Neural Networks (CNNs) in the Document Classification task, essential problem in the digitalization process ... -
Improving web server performance through main memory compression
Beltran Querol, Vicenç; Torres Viñals, Jordi; Ayguadé Parra, Eduard (IEEE Computer Society, 2008)
Comunicació de congrés
Accés obertCurrent web servers are highly multithreaded applications whose scalability benefits from the current multicore/multiprocessor trend. However, some workloads can not capitalize on this because their performance is limited by ... -
Instrumentation environment for Java threaded applications
Guitart Fernández, Jordi; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Oliver, Jose; Labarta Mancho, Jesús José (XI Jornadas de Paralelismo, 2000)
Text en actes de congrés
Accés restringit per política de l'editorialThe rapid maturing process of the Java technology is encouraging users to develope of portable applications using the Java language. As an important part of the definition of the Java language, the use of threads is becoming ... -
Introducing Virtual Execution Environment for Application Lifecycle Management and SLA-Driven Resource Distribution within Service Providers
Goiri Presa, Íñigo; Julià, Ferran; Ejarque, Jorge; Palol, Marc de; Badia Sala, Rosa Maria; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2009-07)
Text en actes de congrés
Accés obertResource management is a key challenge that service providers must adequately face in order to ensure their profitability. This paper describes a proof-of-concept framework for facilitating resource management in service ... -
J2EE instrumentation for software aging root cause application component determination with AspectJ
Alonso López, Javier; Torres Viñals, Jordi; Berral García, Josep Lluís; Gavaldà Mestre, Ricard (IEEE Computer Society Publications, 2010-04-23)
Text en actes de congrés
Accés obertUnplanned system outages have a negative impact on company revenues and image. While the last decades have seen a lot of efforts from industry and academia to avoid them, they still happen and their impact is increasing. ... -
Java instrumentation suite: accurate analysis of Java threaded applications
Guitart Fernández, Jordi; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Oliver, Jose; Labarta Mancho, Jesús José (2000)
Text en actes de congrés
Accés obertThe rapid maturing process of the Java technology is encouraging users the development of portable applications using the Java language. As an important part of the definition of the Java language, the use of threads is ... -
"Living in Barcelona" Li-BCN workload 2010
Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2011)
Report de recerca
Accés obertNowadays lots of Internet users are clients of web hosting companies, willing to offer their web services, store their content, or just publish their web sites on the network. This has made the hosting companies to use big ... -
Loop parallelization: revisiting framework of unimodular transformations
Torres Viñals, Jordi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José; Valero Cortés, Mateo (Institute of Electrical and Electronics Engineers (IEEE), 1996)
Text en actes de congrés
Accés obertThe paper extends the framework of linear loop transformations adding a new nonlinear step at the transformation process. The current framework of linear loop transformation cannot identify a significant fraction of ... -
Managing SLAs of heterogeneous workloads using dynamic application placement
Carrera Pérez, David; Steinder, Malgorzata; Whalley, Ian; Torres Viñals, Jordi; Ayguadé Parra, Eduard (ACM Press, NY, 2008)
Text en actes de congrés
Accés obertIn this paper we address the problem of managing heterogeneous workloads in a virtualized data center. We consider two different workloads: transactional applications and long-running jobs. We present a technique that ... -
Mask-guided sample selection for semi-supervised instance segmentation
Bellver Bueno, Míriam; Salvador Aguilera, Amaia; Torres Viñals, Jordi; Giró Nieto, Xavier (2020-07-05)
Article
Accés obertImage segmentation methods are usually trained with pixel-level annotations, which require significant human effort to collect. Weakly-supervised pipelines are the most common solution to address this constraint because ... -
Matching renewable energy supply and demand in green datacenters
Goiri, Iñigo; Haque, Md E.; Le, Kien; Beauchea, Ryan; Nguyen, Thu D.; Guitart Fernández, Jordi; Torres Viñals, Jordi; Bianchini, Ricardo (Elsevier, 2015-02-01)
Article
Accés obertIn this paper, we propose GreenSlot, a scheduler for parallel batch jobs in a datacenter powered by a photovoltaic solar array and the electrical grid (as a backup). GreenSlot predicts the amount of solar energy that will ... -
Maximizing revenue in Grid markets using an economically enhanced resource manager
Macías Lloret, Mario; Rana, Omer; Smith, Garry; Guitart Fernández, Jordi; Torres Viñals, Jordi (2008-09-01)
Article
Accés restringit per política de l'editorialTraditional resource management has had as its main objective the optimization of throughput, based on parameters such as CPU, memory, and network bandwidth. With the appearance of Grid markets, new variables that determine ... -
Mining urban events from the tweet stream through a probabilistic mixture model
Capdevila Pujol, Joan; Cerquides, Jesús; Torres Viñals, Jordi (2017-08-30)
Article
Accés obertThe geographical identification of content in Social Networks have enabled to bridge the gap between online social platforms and the physical world. Although vast amounts of data in such networks are due to breaking news ... -
Model-based ML for retrospective event detection
Capdevila Pujol, Joan; Cerquides, Jesús; Torres Viñals, Jordi (Barcelona Supercomputing Center, 2018-04-24)
Text en actes de congrés
Accés obert -
Modeling cloud resources using machine learning
Berral García, Josep Lluís; Gavaldà Mestre, Ricard; Torres Viñals, Jordi (2013)
Report de recerca
Accés obertCloud computing is a new Internet infrastructure paradigm where management optimization has become a challenge to be solved, as all current management systems are human-driven or ad-hoc automatic systems that must be tuned ... -
Multifaceted resource management for dealing with heterogeneous workloads in virtualized data centers
Goiri Presa, Íñigo; Fitó, Josep Oriol; Julià Masso, Ferran; Nou Castell, Ramon; Berral García, Josep Lluís; Guitart Fernández, Jordi; Torres Viñals, Jordi (IEEE Computer Society Publications, 2010)
Comunicació de congrés
Accés obertAs long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Now, it is not just used as a tool for consolidating underused nodes and save power, it also allows ... -
Multimedia big data computing for in-depth event analysis
Tous Liesa, Rubén; Torres Viñals, Jordi; Ayguadé Parra, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés obertWhile the most part of ”big data” systems target text-based analytics, multimedia data, which makes up about 2/3 of internet traffic, provide unprecedented opportunities for understanding and responding to real world ... -
Obtaining synchronization-free code with maximum parallelism
Gavaldà Mestre, Ricard; Ayguadé Parra, Eduard; Torres Viñals, Jordi (1996-03)
Report de recerca
Accés obertThis paper addresses the problem of extracting the maximum synchronization-free parallelism that may be present in loops. In order to reduce communication and synchronization overheads, some parallelizing compilers ... -
On automatic loop data-mapping for distributed-memory multiprocessors
Torres Viñals, Jordi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José; Llaberia Griñó, José M.; Valero Cortés, Mateo (Springer, 1991)
Text en actes de congrés
Accés obertIn this paper we present a unified approach for compiling programs for Distributed-Memory Multiprocessors (DMM). Parallelization of sequential programs for DMM is much more difficult to achieve than for shared memory systems ... -
ParaView + Alya + D8tree: Integrating high performance computing and high performance data analytics
Artigues, Antoni; Cugnasco, Cesare; Becerra Fontal, Yolanda; Cucchietti, Fernando; Houzeaux, Guillaume; Vázquez, Mariano; Torres Viñals, Jordi; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José (Elsevier, 2017)
Article
Accés obertLarge scale time-dependent particle simulations can generate massive amounts of data, making it so that storing the results is often the slowest phase and the primary time bottleneck of the simulation. Furthermore, analysing ...