National Research Council of Canada. National Science Infrastructure
Adaptive Optics Systems IV, June 22-27, 2014
Adaptive control systems; Benchmarking; Computer operating systems; Controllers; Optical telescopes; Program processors; Real time control; NFIRAOS; Phi; Real time controllers; RTC; Xeon; Adaptive optics
As a part of the trade study for the Narrow Field Infrared Adaptive Optics System, the adaptive optics system for the Thirty Meter Telescope, we investigated the feasibility of performing real-time control computation using a Linux operating system and Intel Xeon E5 CPUs. We also investigated a Xeon Phi based architecture which allows higher levels of parallelism. This paper summarizes both the CPU based real-time controller architecture and the Xeon Phi based RTC. The Intel Xeon E5 CPU solution meets the requirements and performs the computation for one AO cycle in an average of 767 microseconds. The Xeon Phi solution did not meet the 1200 microsecond time requirement and also suffered from unpredictable execution times. More detailed benchmark results are reported for both architectures.