Bernd Dammann
and
Henrik Madsen
High Performance Computing Center and
Informatics and Mathematical Modelling
Technical University of Denmark
DK-2800 Kongens Lyngby
Denmark
email: {bd, hm}@imm.dtu.dk
In this talk we will give a short overview of the High Performance Computer installation at the Technical University of Denmark (DTU), as well as summary of some code tuning experiences.
It is easy to reduce the runtime of an application for a given problem by buying a computer with a with a faster CPU (higher clock frequency). However, very often the same or even better speed-up of the code can be achieved by analyzing and tuning the code - without the need to invest into new hardware. This will be demonstrated in this talk on a few typical examples where large improvements of the computational speed are obtained.
The main objective of this talk is to demonstrate that one can get more results from available funding resources by moving the focus from clock frequency to a more optimal use of available computer resources - by an increased focus on code optimization as well as optimized algorithms.
The HPC Center's SMP servers are accessible for different groups of researchers in Denmark, and are partly funded by the Danish Center for Scientific Computing (DCSC).