The prototyping was performed using dual-socket high performance Linux servers with the real-time (PREEMPT_RT) patch and demonstrated the viability of a commercial off-the-shelf (COTS) hardware approach to large scale AO reconstruction. In particular, a large custom matrix vector multiplication (MVM) was benchmarked which met the required latency requirements. In addition all major inter-machine communication was verified to be adequate using 10Gb and 40Gb Ethernet. The results of this prototyping has enabled a CPU-based NFIRAOS RTC design to proceed with confidence and that COTS hardware can be used to meet the demanding performance requirements.
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Malcolm Smith, Dan Kerley, Edward L. Chapin, Jennifer Dunn, Glen Herriot, Jean-Pierre Véran, Corinne Boyer, Brent Ellerbroek, Luc Gilles, Lianqi Wang, "Thirty Meter Telescope narrow-field infrared adaptive optics system real-time controller prototyping results," Proc. SPIE 9909, Adaptive Optics Systems V, 99094N (27 July 2016);