Hamburg 2016 – scientific programme
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T: Fachverband Teilchenphysik
T 97: Grid-Computing
T 97.1: Talk
Thursday, March 3, 2016, 16:45–17:00, VMP8 SR 05
Initial validation of ATLAS software on the ARM architecture — Gen Kawamura1, Arnulf Quadt1, Rolf Seuster2, •Joshua Wyatt Smith1, and Graeme Stewart3 — 1II. Physikalisches Institut, Georg-August Universität Göttingen — 2TRIUMF — 3University of Glasgow
In the early 2000’s the introduction of the multi-core era of computing helped industry and experiments such as ATLAS realize even more computing power. This was necessary as the limits of what a single-core processor could do where quickly being reached. Our current model of computing is to increase the number of multi-core nodes in a server farm in order to handle the increased influx of data. As power costs and our need for more computing power increase, this model will eventually become non-realistic. Once again a paradigm shift has to take place. One such option is to look at alternative architectures for large scale server farms. ARM processors are such an example. Making up approximately 95 % of the smartphone and tablet market these processors are widely available, very power conservative and constantly becoming faster. The ATLAS software code base (Athena) is extremely complex comprising of more than 6.5 million lines of code. It has very recently been ported to the ARM 64-bit architecture. The process of our port as well as the first validation plots will be presented and compared to the traditional x86 architecture.