SCHEDULE: NOV 16-21, 2014

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Pipelining Computational Stages of the Tomographic Reconstructor for Multi-Object Adaptive Optics on a Multi-GPU System

SESSION: Earth and Space Sciences

EVENT TYPE: Papers

TIME: 2:00PM - 2:30PM

SESSION CHAIR: Katrin Heitmann

AUTHOR(S):Ali Charara, Hatem Ltaief, Damien Gratadour, David Keyes, Arnaud Sevin, Ahmad Abdelfattah, Eric Gendron, Carine Morel, Fabrice Vidal

ROOM:391-92

ABSTRACT:

The European Extremely Large Telescope project (E-ELT) is one of the European highest priorities in ground-based astronomy. ELTs are built on top of a multitude of highly sensitive and critical astronomic instruments. In particular, a new instrument called MOSAIC has been proposed to perform multi-object spectrograph using a Multi-Object Adaptive Optics (MOAO) technique.
The core implementation of the methodology lies in the intensive computational simulation of a tomographic reconstructor, which accordingly adjusts, in return, the overall instrument for subsequent real-time measurements. A new numerical algorithm is proposed (1) to capture the actual experimental noise and (2) to substantially speed up previous implementations by exposing more concurrency.
Based on the Matrix Over Runtime System Environment numerical library (MORSE), a dynamic scheduler drives all computational stages of the tomographic reconstructor simulation and allows to pipeline and to run tasks out-of-order across different stages on heterogeneous systems, while ensuring data coherency and dependencies.

Chair/Author Details:

Katrin Heitmann (Chair) - Argonne National Laboratory

Ali Charara - King Abdullah University of Science and Technology

Hatem Ltaief - King Abdullah University of Science and Technology

Damien Gratadour - Laboratory for Space Studies and Astrophysics Instrumentation, Paris Observatory, French National Center for Scientific Research, Pierre‑and‑Marie‑Curie University

David Keyes - King Abdullah University of Science and Technology

Arnaud Sevin - Laboratory for Space Studies and Astrophysics Instrumentation, Paris Observatory, French National Center for Scientific Research, Pierre‑and‑Marie‑Curie University

Ahmad Abdelfattah - King Abdullah University of Science and Technology

Eric Gendron - Laboratory for Space Studies and Astrophysics Instrumentation, Paris Observatory, French National Center for Scientific Research, Pierre‑and‑Marie‑Curie University

Carine Morel - Laboratory for Space Studies and Astrophysics Instrumentation, Paris Observatory, French National Center for Scientific Research, Pierre‑and‑Marie‑Curie University

Fabrice Vidal - Laboratory for Space Studies and Astrophysics Instrumentation, Paris Observatory, French National Center for Scientific Research, Pierre‑and‑Marie‑Curie University