In this article we discuss our implementation of a polyphase filter for real-time data processing in radio astronomy. The polyphase filter is a standard tool in digital signal processing and as such a well established algorithm. We describe in detail our implementation of the polyphase filter algorithm and its behaviour on three generations of NVIDIA GPU cards (Fermi, Kepler, Maxwell), on the I...

The current approach to developing mixed-criticality systems is by partitioning the hardware resources (processors, memory and I/O devices) among the different applications. Partitions are isolated from each other both in the temporal and the spatial domain, so that low-criticality applications cannot compromise other applications with a higher level of criticality in case of misbehaviour. New ...

We discuss how algorithmic skeletons (and structured parallel programming models in general) can be used to efficiently and seamlessly program multicore as well as many-core systems. We introduce a new version of the muskel skeleton library that can be used to target multi/many-core systems and we present experimental results that demonstrate the feasibility of the approach. The experimental re...

Co-scheduling is known to optimize the utilization of supercomputers. By choosing applications with distict resource demands, the application throughput can be increased avoiding an underutilization of the available nodes. This is especially true for traditional multi-core architecture where a subset of the available cores are already able to saturate the main memory bandwidth. In this paper, w...

OF THE DISSERTATION Runtime Memory Management in Many-core Systems By Hossein Tajik Doctor of Philosophy in Computer Science University of California, Irvine, 2016 Professor Nikil Dutt, Chair With the number of cores on a chip continuing to increase, we are moving towards an era where many-core platforms will soon be ubiquitous. Efficient use of tens to hundreds of cores on a chip and their mem...

This paper first presents an analysis of the global thermal field in many core processors in deep nanometer (to 16nm) nodes under power and thermal budget. We show that the thermal field can have significant spatiotemporal non-uniformity along with high maximum temperature. We propose spatiotemporal power multiplexing as a proactive method to reduce spatial and temporal temperature gradients. S...

Background and Objectives: Digital signal processors are widely used in energy constrained applications in which battery lifetime is a critical concern. Accordingly, designing ultra-low-energy processors is a major concern. In this work and in the first step, we propose a sub-threshold DSP processor. Methods: As our baseline architecture, we use a modified version of an existing ultra-low-power...