9/20/2005
11:00am-12:00pm
NCAR
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Application Performance of Terascale Systems
Gerhard Wellein
University of Erlangen-Nürnberg, HPC Services, Computing Center
The large gap between peak performance and application performance on most HPC
systems has widely been recognized. Thus, deep application performance studies
are required to prepare the procurement of new leading class computer systems.
Supporting the installation of a new NEC SX-8 vector machine at HLR Stuttgart
(9 TFlop/s) and a new SGI Altix at LRZ Munich (32 TFlop/s in 2006; 69 TFlop/s
in 2007), my group has performed extensive performance studies with special
focus on CFD applications (Finite-Volume & Lattice Boltzmann). The
characteristics of a wide range of single-and dual-core processor systems
(Intel Xeon/Itanium, AMD Opteron, IBM Power) are discussed with small kernels.
A parallel Lattice Boltzmann code is used to test massively parallel systems
and to comment on the value of vector machines for High-End Computing.
This talk is sponsored by the National Center for Atmospheric Research Scientific Computing Division and will be held in the Damon Room at the Mesa Lab.
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