Computer simulations and real-time control of ELT AO systems using graphical processing units

Lianqi Wang; Brent Ellerbroek

doi:10.1117/12.926500

13 September 2012 Computer simulations and real-time control of ELT AO systems using graphical processing units

Lianqi Wang, Brent Ellerbroek

Proceedings Volume 8447, Adaptive Optics Systems III; 844723 (2012) https://doi.org/10.1117/12.926500
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The adaptive optics (AO) simulations at the Thirty Meter Telescope (TMT) have been carried out using the efficient, C based multi-threaded adaptive optics simulator (MAOS, http://github.com/lianqiw/maos). By porting time-critical parts of MAOS to graphical processing units (GPU) using NVIDIA CUDA technology, we achieved a 10 fold speed up for each GTX 580 GPU used compared to a modern quad core CPU. Each time step of full scale end to end simulation for the TMT narrow field infrared AO system (NFIRAOS) takes only 0.11 second in a desktop with two GTX 580s. We also demonstrate that the TMT minimum variance reconstructor can be assembled in matrix vector multiply (MVM) format in 8 seconds with 8 GTX 580 GPUs, meeting the TMT requirement for updating the reconstructor. Analysis show that it is also possible to apply the MVM using 8 GTX 580s within the required latency.

Citation Download Citation

Lianqi Wang and Brent Ellerbroek "Computer simulations and real-time control of ELT AO systems using graphical processing units", Proc. SPIE 8447, Adaptive Optics Systems III, 844723 (13 September 2012); https://doi.org/10.1117/12.926500

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