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Combining Smoother and Residual Calculation in v-cycle AMG for Symmetric Problems

  • Maximilian Emans
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7203)

Abstract

We examine a modified implementation of the v-cycle multigrid scheme which takes into account the memory traffic, i.e. the movement of data between the memory and the processing units. It is known that the relatively slow data transfer is responsible for the poor parallel performance of multigrid algorithms on certain shared memory architectures e.g. those with a front-side bus memory controller. The modification is simple but it speeds up computations by up to 15%.

Keywords

Shared Memory Memory Bandwidth Total Computing Time Multigrid Algorithm Memory Access Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Maximilian Emans
    • 1
    • 2
  1. 1.Johann Radon Institute for Computational and Applied Mathematics (RICAM)LinzAustria
  2. 2.Industrial Mathematics Competence Center GmbH (IMCC)LinzAustria

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