Now showing items 1-20 of 30

    • A performance perspective on energy efficient HPC links 

      Saravanan, Karthikeyan P.; Carpenter, Paul; Ramírez Bellido, Alejandro (Association for Computing Machinery (ACM), 2014)
      Conference lecture
      Open Access
      Energy costs are an increasing part of the total cost of ownership of HPC systems. As HPC systems become increasingly energy proportional in an effort to reduce energy costs, interconnect links stand out for their inefficiency. ...
    • A streaming machine description and programming model 

      Carpenter, Paul; Ródenas Picó, David; Martorell Bofill, Xavier; Ramírez Bellido, Alejandro; Ayguadé Parra, Eduard (2007-07)
      Article
      Restricted access - publisher's policy
      In this paper we present the initial development of a streaming environment based on a programming model and machine description. The stream programming model consists of an extension to the C language and it’s translation ...
    • ACOTES project: Advanced compiler technologies for embedded streaming 

      Duranton, M.; Munk, H.; Ayguadé Parra, Eduard; Bastoul, C.; Carpenter, Paul; Chamski, Z.; Cohen, A.; Cornero, M.; Dumont, P.; Pop, S.; Pop, A.; Ornstein, A.; Nuzman, D.; Miranda, C.; Martorell Bofill, Xavier; Lindwer, M.; Ladelsky, R.; Ferrer, Roger; Fellahi, M.; Pouchet, L. N; Zaks, A.; Shvadron, U.; Trifunovic, K.; Rohou, E.; Rosen, I.; Ramírez Bellido, Alejandro; Ródenas, D. (2011-04)
      Article
      Open Access
      Streaming applications are built of data-driven, computational components, consuming and producing unbounded data streams. Streaming oriented systems have become dominant in a wide range of domains, including embedded ...
    • Aggregating and managing memory capacity across computing nodes in cloud environments 

      Garrido, Luis; Carpenter, Paul (Barcelona Supercomputing Center, 2017-05-04)
      Conference report
      Open Access
      Managing memory capacity in cloud environments is a challenging issue, mainly due to the temporal variability in virtual machine (VM) memory demand. The Virtual Machine Manager or the hypervisor allocates a portion of the ...
    • Analyzing performance improvements and energy savings in Infiniband architecture using network compression 

      Dickov, Branimir; Pericas, Miquel; Carpenter, Paul; Navarro, Nacho; Ayguadé Parra, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      One of the greatest challenges in HPC is total system power and energy consumption. Whereas HPC interconnects have traditionally been designed with a focus on bandwidth and latency, there is an increasing interest in ...
    • Buffer sizing for self-timed stream programs on heterogeneous distributed memory multiprocessors 

      Carpenter, Paul; Ramírez Bellido, Alejandro; Ayguadé Parra, Eduard (Springer Verlag, 2010)
      Conference report
      Restricted access - publisher's policy
      Stream programming is a promising way to expose concurrency to the compiler. A stream program is built from kernels that communicate only via point-to-point streams. The stream compiler statically allocates these kernels ...
    • Cost-aware prediction of uncorrected DRAM errors in the field 

      Boixaderas, Isaac; Carpenter, Paul; Radojkovic, Petar; Ayguadé Parra, Eduard (Barcelona Supercomputing Center, 2021-05)
      Conference report
      Open Access
      One of the main causes of hardware failure in large-scale clusters is an uncorrected error in main memory [1]–[4]. Node failures are especially problematic in high-performance computing (HPC), where a single tightly-coupled ...
    • Energy optimizing methodologies on heterogeneous data centers 

      Nishtala, Rajiv; Carpenter, Paul; Petrucci, Vinicius; Martorell Bofill, Xavier (Barcelona Supercomputing Center, 2017-05-04)
      Conference report
      Open Access
      In 2013, U.S. data centers accounted for 2.2% of the country’s total electricity consumption, a figure that is projected to increase rapidly over the next decade. Many important work-loads are interactive, and they demand ...
    • Inception: we need to go wider 

      Nishtala, Rajiv; Carpenter, Paul; Martorell, Xavier (Barcelona Supercomputing Center, 2018-04-24)
      Conference report
      Open Access
    • Intelligent colocation of HPC workloads 

      Vieira Zacarias, Felippe; Petrucci, Vinicius; Nishtala, Rajiv; Carpenter, Paul; Mossé, Daniel (Elsevier, 2021-05)
      Article
      Restricted access - publisher's policy
      Many server applications suffer from a bottleneck in the shared caches, instruction execution units, I/O or memory bandwidth, even though the remaining resources may be underutilized. It is hard for developers and runtime ...
    • LEGaTO: first steps towards energy-efficient toolset for heterogeneous computing 

      Cristal, Adrian; Unsal, Osman S.; Martorell, Xavier; Carpenter, Paul; de la Cruz, Raul; Bautista, Leonardo; Jimenez, Daniel; Alvarez, Carlos; Salami, Behzad; Madonar, Sergi; Pericàs, Miquel; Trancoso, Pedro; vor dem Berge, Micha; Billung-Meyer, Gunnar; Krupop, Stefan; Christmann, Wolfgang; Klawonn, Frank; Mihklafi, Amani; Becker, Tobias; Gaydadjiev, Georgi; Salomonsson, Hans; Dubhashi, Devdatt; Port, Oron; Hadar, Elad; Etsion, Yoav; Fetzer, Christof; Hagemeyer, Jens; Jungeblut, Thorsten; Kucza, Nils; Kaiser, Martin; Porrmann, Mario; Pasin, Marcelo; Schiavoni, Valerio; Rocha, Isabelly; Göttel, Christian; Felber, Pascal (ACM, 2018-07-15)
      Conference lecture
      Open Access
      LEGaTO is a three-year EU H2020 project which started in December 2017. The LEGaTO project will leverage task-based programming models to provide a software ecosystem for Made-in-Europe heterogeneous hardware composed of ...
    • LEGaTO: towards energy-efficient, secure, fault-tolerant toolset for heterogeneous computing 

      Cristal Kestelman, Adrián; Unsal, Osman S.; Martorell, Xavier; Carpenter, Paul; de la Cruz, Raul; Bautista, Leonardo; Jimenez, Daniel; Alvarez, Carlos; Salami, Behzad; Madonar, Sergi; Pericàs, Miquel; Trancoso, Pedro; von dem Berge, Micha; Billung-Meyer, Gunnar; Krupop, Stefan; Christmann, Wolfgang; Klawonn, Frank; Mihklafi, Amani; Becker, Tobias; Gaydadjiev, Georgi; Salomonsson, Hans; Dubhashi, Devdatt; Port, Oron; Etsion, Yoav; Nowack, Vesna; Fetzer, Christof; Hagemeyer, Jens; Jungeblut, Thorsten; Kucza, Nils; Kaiser, Martin; Porrmann, Mario; Pasin, Marcelo; Schiavoni, Valerio; Rocha, Isabelly; Göttel, Christian; Felber, Pascal (Association for Computing Machinery (ACM), 2018-05-08)
      Conference lecture
      Open Access
      LEGaTO is a three-year EU H2020 project which started in December 2017. The LEGaTO project will leverage task-based programming models to provide a software ecosystem for Made-in-Europe heterogeneous hardware composed of ...
    • Mapping stream programs onto heterogeneous multiprocessor systems 

      Carpenter, Paul; Ramírez Bellido, Alejandro; Ayguadé Parra, Eduard (ACM Press, NY, 2009)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents a partitioning and allocation algorithm for an iterative stream compiler, targeting heterogeneous multiprocessors with constrained distributed memory and any communications topology. We introduce a ...
    • Paving the Way Towards a Highly Energy-Efficient and Highly Integrated Compute Node for the Exascale Revolution: The ExaNoDe Approach 

      Rigo, Alvise; Pinto, Christian; Pouget, Kevin; Raho, Daniel; Dutoit, Denis; Martinez, Pierre-Yves; Doran, Chris; Benini, Luca; Mavroidis, Iakovos; Marazakis, Manolis; Bartsch, Valeria; Lonsdale, Guy; Pop, Antoniu; Goodacre, John; Colliot, Annaïk; Carpenter, Paul; Radojkovic, Petar; Pleiter, Dirk; Drouin, Dominique; Dupont de Dinechin, Benoît (IEEE, 2017-09-28)
      Conference lecture
      Open Access
      Power consumption and high compute density are the key factors to be considered when building a compute node for the upcoming Exascale revolution. Current architectural design and manufacturing technologies are not able ...
    • Power/performance evaluation of Energy Efficient Ethernet (EEE) for High Performance Computing 

      Karthikeyan Palavedu, Saravanan; Carpenter, Paul; Ramírez Bellido, Alejandro (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      As of June 2012, 41 % of all systems in the TOP5OO use Gigabit Ethernet. Ethernet has been a strong contender in the HPC interconnect market for its competitive performance and low cost. However, until recently, little ...
    • Rebalancing the core front-end through HPC code analysis 

      Milic, Ugljesa; Carpenter, Paul; Rico, Alejandro; Ramirez, Alex (IEEE, 2016-10-10)
      Conference report
      Open Access
      There is a need to increase performance under the same power and area envelope to achieve Exascale technology in high performance computing (HPC). The today's chip multiprocessor (CMP) design is tailored by traditional ...
    • Rebalancing the core front-end through HPC code analysis 

      Milic, Ugljesa; Carpenter, Paul; Rico, Alejandro; Ramirez, Alex (IEEE, 2016-09-25)
      Conference lecture
      Open Access
      There is a need to increase performance under the same power and area envelope to achieve Exascale technology in high performance computing (HPC). The today's chip multiprocessor (CMP) design is tailored by traditional ...
    • RETHINK big: European roadmap for hardware anc networking optimizations for big data 

      Alioto, Gina; Carpenter, Paul; Cristal Kestelman, Adrián; Unsal, Osman; Leich, Marcus; Avare, Christophe (Institute of Electrical and Electronics Engineers (IEEE), 2017-05-15)
      Conference lecture
      Open Access
      This paper discusses the results of the RETHINK big Project, a 2-year Collaborative Support Action funded by the European Commission in order to write the European Roadmap for Hardware and Networking optimizations for Big ...
    • Running stream-like programs on heterogeneous multi-core systems 

      Carpenter, Paul (Universitat Politècnica de Catalunya, 2011-10-24)
      Doctoral thesis
      Open Access
      All major semiconductor companies are now shipping multi-cores. Phones, PCs, laptops, and mobile internet devices will all require software that can make effective use of these cores. Writing high-performance parallel ...
    • Runtime estimation of performance–power in CMPs under QoS constraints 

      Nishtala, Rajiv; Martorell Bofill, Xavier; Carpenter, Paul (Barcelona Supercomputing Center, 2015-05-05)
      Conference report
      Open Access
      One of the main challenges in data center systems is operating under certain Quality of Service (QoS) while minimizing power consumption. Increasingly, data centers are exploring and adopting heterogeneous server architectures ...