Berkeley Lab - Scientific Computing Seminar

Date:

Friday, February 22, 2008

Time:

1:00pm-2:00pm

Location:

Building 50A, 5132 Conference Room

Seminar Speaker:

Fred G. Gustavson
IBM T.J. Watson Research Center

Title:

The Relevance of New Data Structure Approaches for Dense Linear Algebra in the New Multi-Core/Many-Core Environments

Abstract:

For over ten years now, Bo Kagstrom's Group in Umea, Sweden, Jerzy Wasniewski's team at Danish Technical University in Lyngby, Denmark, John Gunnels and I at IBM Research in Yorktown Heights have been applying recursion and New Data Structures (NDS) to increase the performance of Dense Linear Algebra (DLA) factorization algorithms. For about four years now almost all computer manufacturers have dramatically changed their computer architectures which they call Multi-Core, (MC). It turns out that these new designs give poor performance for the traditional designs of DLA libraries such as LAPACK and ScaLAPACK. Recent results of Jack Dongarra's group at the Innovative Computing Laboratory in Knoxville, Tennesee have shown how to obtain high performance for DLA factorization algorithms on the Cell architecture, an example of an MC processor, but only when they used NDS. In this talk we will give some reasons why this is so.

Sponsor of Seminar:

James Demmel

Scientific Computing

Contact Esmond G. Ng EGNg@lbl.gov