Scientific Computing Seminar

Date:

Thursday, December 16, 2004

Time:

1:00pm-2:00pm

Location:

50A-5132

Seminar Speaker:

Kengo Nakajima
The 21st Century Earth Science COE (Center of Excellence) Program
Department of Earth and Planetary Science
The University of Tokyo

Title:

Performance of large-scale finite-element applications in earth science on BlueGene/L prototype system using parallel iterative solvers of GeoFEM

Abstract:

BlueGene/L (BG/L) is a scalable system for scientific and engineering computation developed by IBM and US Department of Energy. BG/L is configured as a 64x32x32 three-dimensional torus of compute nodes. Peak performance of the entire system is expected 367 TFLOPS. In this study, parallel iterative solvers of GeoFEM for nonlinear contact problem in earth science simulations have been implemented and tested on BG/L prototype with 512 nodes. BG/L prototype demonstrated excellent performance and scalability for wide range of problem sizes up to 512 nodes. Performance of BG/L prototype at 500 MHz was competitive with that of IBM-SP3, which has larger peak performance for each processor, due to high memory bandwidth and low latency.

Sponsor of Seminar:

Esmond Ng

Scientific Computing

Contact Esmond G. Ng EGNg@lbl.gov