SCHEDULE: NOV 12-18, 2011

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A GPU-based Architecture for Real-Time DataAssessment at Synchrotron Experiments

SESSION: Research Poster Reception

EVENT TYPE: ACM Student Research Competition Poster, Poster, Electronic Poster

TIME: 5:15PM - 7:00PM

SESSION CHAIR: Bernd Mohr

AUTHOR(S):Suren Chilingaryan, Alessandro Mirone, Andreas Kopmann, Tomy dos Santos Rolo, Matthias Vogelgesang

ROOM:WSCC North Galleria 2nd/3rd Floors

ABSTRACT:
Advances in digital detector technology leads presently to rapidly increasing data rates in imaging experiments. Using fast two-dimensional detectors in computed tomography, the data acquisition can be much faster than the reconstruction if no adequate measures are taken. We have optimized the reconstruction software employed at the micro-tomography beamlines of our synchrotron facilities to use the computational power of modern graphic cards. The main paradigm of our approach is the full utilization of all system resources. We use a pipelined architecture, where the GPUs are used as compute coprocessors to reconstruct slices, while the CPUs are preparing the next ones. Special attention is devoted to minimize data transfers between the host and GPU memory and to execute memory transfers in parallel with the computations. We were able to reduce the reconstruction time by a factor 80 and process a typical data set of 20 GB in 15 seconds.

Chair/Author Details:

Bernd Mohr (Chair) - Juelich Supercomputing Centre

Suren Chilingaryan - Karlsruhe Institute of Technology

Alessandro Mirone - ESRF

Andreas Kopmann - Karlsruhe Institute of Technology

Tomy dos Santos Rolo - Karlsruhe Institute of Technology

Matthias Vogelgesang - Karlsruhe Institute of Technology

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