Browsing by Author "Wagner, Michael"

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    • Automatic Adaption of the Sampling Frequency for Detailed Performance Analysis 

      Wagner, Michael; Knüpfer, Andreas (Institute of Electrical and Electronics Engineers (IEEE), 2017-07-13)
      Conference lecture
      Open Access
      One of the most urgent challenges in event based performance analysis is the enormous amount of collected data. Combining event tracing and periodic sampling has been a successful approach to allow a detailed event-based ...

    • Automatic speaker recognition as a measurement of voice imitation and conversion 

      Farrús Cabeceran, Mireia; Wagner, Michael; Erro Eslava, Daniel; Hernando Pericás, Francisco Javier (2010-01-01)
      Article
      Open Access
      Voices can be deliberately disguised by means of human imitation or voice conversion. The question arises to what extent they can be modified by using either method. In the current paper, a set of speaker identification ...

    • Efficient Computation of Sparse Matrix Functions for Large-Scale Electronic Structure Calculations: The CheSS Library 

      Mohr, Stephan; Dawson, William; Wagner, Michael; Caliste, Damien; Nakajima, Takahito; Genovese, Luigi (American Chemical Society, 2017-09-05)
      Article
      Open Access
      We present CheSS, the “Chebyshev Sparse Solvers” library, which has been designed to solve typical problems arising in large-scale electronic structure calculations using localized basis sets. The library is based on a ...

    • Performance analysis and optimization of the FFTXlib on the Intel knights landing architecture 

      Wagner, Michael; López, Victor; Morillo, Julian; Cavazzoni, Carlo; Affinito, Fabio; Gimenez, Judit; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Open Access
      In this paper, we address the decreasing performance of the FFTXlib, the Fast Fourier Transformation (FFT) kernel of Quantum ESPRESSO, when scaling to a full KNL node. An increased performance in the FFTXlib will likewise ...

    • Performance analysis on the Intel Knights Landing architecture 

      Wagner, Michael; Gimenez, Judit (Barcelona Supercomputing Center, 2017-05-04)
      Conference report
      Open Access
      One of the emerging architectures in HPC systems is Intel’s Knights Landing (KNL) many core chip, which will also be part of BSC’s next HPC installation MareNostrum 4. KNL is the code name of the second generation of Intel ...