24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Block Solver for multiple right hand sides on NVIDIA GPUs

28 Jul 2016, 14:20
20m
Building 67 Room 1007 (Highfield Campus, University of Southampton)

Building 67 Room 1007

Highfield Campus, University of Southampton

Talk Algorithms and Machines Algorithms and Machines

Speaker

Dr Mathias Wagner (NVIDIA)

Description

Analysis tasks in Lattice QCD often requires solving linear equations for multiple right hand sides for a constant gauge field. Recently deflation methods have become more widely used and proven to be very efficient. They however do require the calculation and storing of eigenvectors which is either not always feasible or too expensive. Here we present results for an implementation of a block solver for multiple right hand sides using the QUDA library for QCD on NVIDIA GPUs. By making use of the gauge field reuse in the Dslash operator, mixed precision approaches and block Krylov space methods they do provide outstanding solver performance. We present results on NVIDIA's most recent Pascal architecture.

Primary author

Dr Mathias Wagner (NVIDIA)

Co-author

Dr Kate Clark (NVIDIA)

Presentation Materials