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Domain-Specific Optimization of Two Jacobi Smoother Kernels and Their Evaluation in the ECM Performance Model

Stefan Kronawitter, Holger Stengel, Georg Hager, Christian Lengauer
2014 Parallel Processing Letters  
We conducted a study in which we applied optimizing transformations to two Jacobi smoother kernels: one 3D 1st-order 7-point stencil and one 3D 3rd-order 19-point stencil.  ...  We also verified the need for complex optimizations with the help of the Execution-Cache-Memory performance model.  ...  Acknowledgements This work is part of project ExaStencils in the DFG Priority Research Initiative SPPEXA, grant no. LE 912/15-1. We are grateful for useful discussions with Gerhard Wellein (RRZE).  ... 
doi:10.1142/s0129626414410047 fatcat:s4zcme47jjav5b3dqxus6liwye

Collecting and Presenting Reproducible Intranode Stencil Performance: INSPECT

2019 Supercomputing Frontiers and Innovations  
We present the underlying methods, models and tools involved in gathering and documenting the performance behavior of a collection of typical stencil patterns across multiple architectures and hardware  ...  Our open-source toolchain and collected results are publicly available in the "Intranode Stencil Performance Evaluation Collection" (INSPECT).  ...  This paper is distributed under the terms of the Creative Commons Attribution-Non Commercial 3.0 License which permits non-commercial use, reproduction and distribution of the work without further permission  ... 
doi:10.14529/jsfi190301 fatcat:sl7rq3mxwbbxleyfoykazaefdm

Performance and Scalability of Hierarchical Hybrid Multigrid Solvers for Stokes Systems

Björn Gmeiner, Ulrich Rüde, Holger Stengel, Christian Waluga, Barbara Wohlmuth
2015 SIAM Journal on Scientific Computing  
The design of our fast multigrid solver is guided by an innovative performance analysis for the computational kernels in combination with a quantification of the communication overhead.  ...  In this work we consider a realization of an iterative saddle-point solver which is based mathematically on the Schur-complement formulation of the pressure and algorithmically on the abstract concept  ...  We are grateful to the Jülich Supercomputing Center and the Leibniz Rechenzentrum for providing computational resources.  ... 
doi:10.1137/130941353 fatcat:zd5m3ab7fnat5chvfrfpzwmouq

On Fitting Finite Dirichlet Mixture Using ECM and MML [chapter]

Nizar Bouguila, Djemel Ziou
2005 Lecture Notes in Computer Science  
Fluid queue models play a vital role in the performance analysis of computer and telecommunication networks.  ...  The steady-state distribution of the buffer content and related performance measures are obtained. Special cases such as Erlang, exponential and deterministic service times are discussed.  ...  within the domain of their applicability.  ... 
doi:10.1007/11551188_19 fatcat:gtzi5u6emvfyxea3zbklobnvom

The Secondary-Tertiary Transition in Mathematics. Successful Students in Crisis

Francesca Gregorio, Pietro Di Martino, Paola Iannone
2019 EMS Newsletter  
and housing assistance Postdoctoral program Attracting to Paris the most talented young mathematicians t ± 20 laureates / year + 5 laureates / year within the framework of the DIM MathInnov program t  ...  attractivity of Paris and its areas 2 programs supported by the Région IdF: -DIM MathInnov -PhD 2 t ± 20 laureates / year t 3-year allowances t Net salary: 1 450 € (min) / month plus health insurance  ...  for sharing the DLMF citation analysis with us.  ... 
doi:10.4171/news/113/10 fatcat:6dpvl6b3pvblrfbihn2lc7cbra

Tiling and Asynchronous Communication Optimizations for Stencil Computations

Tareq Majed, Yasin Malas
2015 unpublished
Their long experience in High Performance Computing and performance modeling was critical in improving our research, through our collaboration and regular meetings.  ...  Tiling and Asynchronous Communication Optimizations for Stencil Computations Tareq Majed Yasin Malas The importance of stencil-based algorithms in computational science has focused attention on optimized  ...  In the following we describe in detail two "corner cases" of stencil update schemes: a three-dimensional seven-point stencil with constant coe cients (Jacobi-type smoother, see listing 3.1) and a three-dimensional  ... 

Simulation Driven Performance Analysis for Software Optimization

Josef Weidendorfer
Simulation of computer systems (or components thereof) traditionally is used in the design and evaluation of new hardware configurations and enhancements.  ...  This work gives an overview of the kind of architecture simulation useful for performance analysis and optimization purpose, its benefits and potentials, but also disadvantages and limitations in contrast  ...  The model relates the performance measured in a kernel to the peak performance that should be achievable in the best case, taking the data transfer behavior of the kernel from/to main memory into account  ... 
doi:10.14459/2015md1303711 fatcat:skrpng2en5flzkdf22mxtlnr54

A theoretical model of vascularized tumors : simulation of blood vessel network remodeling, interstitial fluid flow and oxygenation [article]

Michael Welter, Universität Des Saarlandes, Universität Des Saarlandes
This thesis covers the development of a theoretical model of macroscopic vascularized tumor growth, the analysis of morphological characteristics, blood flow and tissue oxygenation in dependence on the  ...  vascular network in which the tumor grows, as well as an analysis of potential barriers to drug delivery caused by the transport characteristics of tumor blood vessel networks and tissue.  ...  Thus their performance in patients is often overestimated.  ... 
doi:10.22028/d291-23205 fatcat:jg672e3gnnaqtckqmwvq7tz7qq