Browsing by Author "Landwehr, Aaron Myles"
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Item An experimental exploration of self-aware systems for exascale architectures(University of Delaware, 2016) Landwehr, Aaron MylesHigh-performance systems are evolving to a point where performance is no longer the sole relevant criterion anymore. Current execution and resource management paradigms are no longer sufficient to ensure correctness and performance. Power requirements are presently driving the co-design of HPC systems, which in turn sets the course for a radical change in how to express the need for scarcer and scarcer resources, as well as, how to manage them. As a result, systems will need to become more introspective and self-aware with respect to performance, energy, and resiliency. To this end, this thesis explores the major hardware requirements that are central to enabling introspection, the types of interfaces and information that will be needed for introspective system software, provides an abstract representation of exascale architectures based on current trends, and implements an exascale simulation framework with built in temperature and power management capabilities. Through this framework, we demonstrate that localized adaptive policies are not sufficient for exascale systems and that instead coordinated hierarchical adaptive policies are need in order to effectively adapt and mitigate oscillation within systems consisting of thousands of independent cores.Item A packetized display protocol architecture for infrared scene projection systems(University of Delaware, 2020) Landwehr, Aaron MylesCurrent fixed frame rate display technology, such as, DVI, HDMI, and DisplayPort is commonly utilized for high-speed IR display systems. This technology, designed for relatively low-speed operation, incorporates a number of design decisions that limit the ability for it to meet the increasing requirements of larger resolutions and faster frame rates needed within IR display systems. Firstly, it requires custom designed synchronization solutions and hardware when utilized within environments where multiple components need to be synchronized. This is because it is not designed to handle system level synchronization. Secondly, the fixed frame rate nature of the technology imposes a static requirement on frame rate across all displayed frames. This unnecessarily increases bandwidth demands by requiring the same amount of data be sent for all frames regardless of what data changes. As a result, maximum frame rate unnecessarily becomes a function of limited hardware bandwidth and image resolution. ☐ This dissertation introduces a generalizable, dynamic, and scalable packetized display protocol (PDP) architecture. It incorporates dynamic frame rates, and high-speed capabilities to bridge the performance gaps within existing display solutions for current IR display systems. This PDP architecture eschews with many assumptions found in conventional display protocol technology. In doing so, it provides scalability, reduces bandwidth requirements, increases performance, eases synchronization burden as well as provides a desirable set of features for current and future IRLED Scene Projection systems. These features include dynamic sub-window (intra-frame) refresh rates, dynamic bandwidth utilization, and dynamic inter-frame refresh rates. Furthermore, this dissertation contributes a protocol specification and implementation on real hardware, coupled with a demonstration of the benefits of this type of technology for use within high-speed IR display systems.