Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 96: Neutrinoastronomie III

T 96.8: Talk

Thursday, March 12, 2015, 18:30–18:45, I.12.02 (HS 31)

Micro parallelism vs. macro parallelism - methods to speed up IceCube track and energy reconstructions — •Kevin Abraham for the IceCube collaboration — TU München, Physik-Department, Excellence Cluster Universe, Boltzmannstr. 2, 85748 Garching

The IceCube Neutrino Telescope located at the South Pole is the World's largest neutrino telescope. The sensitivity of IceCube to astrophysical point sources strongly depends on the accuracy of track reconstructions. Accurately reconstructing an event requires a large amount of computational resources. Specifically, significant time is spent evaluating spline tables. This talk reports on two different approaches to speed up spline table evaluations,by using GPUs and by utilizing the vector extensions available in the instruction set of modern CPUs. Additionally, the effect of machine precision on reconstruction accuracy is presented.