A Grid Portal for an Undergraduate Parallel Programming Course

[Abstract] This paper describes an experience of designing and implementing a portal to support transparent remote access to supercomputing facilities to students enrolled in an undergraduate parallel programming course. As these facilities are heterogeneous, are located at different sites, and belong to different institutions, grid computing technologies have been used to overcome these issues. The result is a grid portal based on a modular and easily extensible software architecture that provides a uniform and user-friendly interface for students to work on their programming laboratory assignments.Universidade da Coruña; UDC-TIC03-057Xunta de Galicia; PGIDIT02TIC00103CTXunta de Galicia; PGIDIT04TIC105004PREuropean Commission; IST-2001-3224

Insights, Spring, 2000

Bi-annual alumni newsletter for the College of Science of Utah State University in Logan.https://digitalcommons.usu.edu/discovery/1028/thumbnail.jp

Performance and Memory Space Optimizations for Embedded Systems

Embedded systems have three common principles: real-time performance, low power consumption, and low price (limited hardware). Embedded computers use chip multiprocessors (CMPs) to meet these expectations. However, one of the major problems is lack of efficient software support for CMPs; in particular, automated code parallelizers are needed. The aim of this study is to explore various ways to increase performance, as well as reducing resource usage and energy consumption for embedded systems. We use code restructuring, loop scheduling, data transformation, code and data placement, and scratch-pad memory (SPM) management as our tools in different embedded system scenarios. The majority of our work is focused on loop scheduling. Main contributions of our work are: We propose a memory saving strategy that exploits the value locality in array data by storing arrays in a compressed form. Based on the compressed forms of the input arrays, our approach automatically determines the compressed forms of the output arrays and also automatically restructures the code. We propose and evaluate a compiler-directed code scheduling scheme, which considers both parallelism and data locality. It analyzes the code using a locality parallelism graph representation, and assigns the nodes of this graph to processors.We also introduce an Integer Linear Programming based formulation of the scheduling problem. We propose a compiler-based SPM conscious loop scheduling strategy for array/loop based embedded applications. The method is to distribute loop iterations across parallel processors in an SPM-conscious manner. The compiler identifies potential SPM hits and misses, and distributes loop iterations such that the processors have close execution times. We present an SPM management technique using Markov chain based data access. We propose a compiler directed integrated code and data placement scheme for 2-D mesh based CMP architectures. Using a Code-Data Affinity Graph (CDAG) to represent the relationship between loop iterations and array data, it assigns the sets of loop iterations to processing cores and sets of data blocks to on-chip memories. We present a memory bank aware dynamic loop scheduling scheme for array intensive applications.The goal is to minimize the number of memory banks needed for executing the group of loop iterations

REU Site: Supercomputing Undergraduate Program in Maine (SuperMe)

This award, for a new Research Experience for Undergraduates (REU) site, builds a Supercomputing Undergraduate Program in Maine (SuperMe). This new site provides ten-week summer research experiences at the University of Maine (UMaine) for ten undergraduates each year for three years. With integrated expertise of ten faculty researchers from both computer systems and domain applications, SuperMe allows each undergraduate to conduct meaningful research, such as developing supercomputing techniques and tools, and solving cutting-edge research problems through parallel computing and scientific visualization. Besides being actively involved in research groups, students attend weekly seminars given by faculty mentors, formally report and present their research experiences and results, conduct field trips, and interact with ITEST, RET and GK-12 participants. SuperMe provides scientific exploration ranging from engineering to sciences with a coherent intellectual focus on supercomputing. It consists of four computer systems projects that aim to improve techniques in grid computing, parallel I/O data accesses, high-resolution scientific visualization and information security, and five computer modeling projects that utilize world-class supercomputing and visualization facilities housed at UMaine to perform large, complex simulation experiments and data analysis in different science domains. SuperMe provides a diversity of cutting-edge research opportunities to students from under-represented groups or from universities in rural areas with limited research opportunities. Through interacting directly with the participant of existing programs at UMaine, including ITEST, RET and GK-12, REU students disseminates their research results and experiences to middle and high school students and teachers. This site is co-funded by the Department of Defense in partnership with the NSF REU Site program

Energy-efficient mobile Web computing

Next-generation Web services will be primarily accessed through mobile devices. However, mobile devices are low-performance and stringently energy-constrained. In my dissertation, I propose the design of a high-performance and energy-efficient mobile Web computing substrate. It is a hardware/software co-designed system that delivers satisfactory user quality-of-service (QoS) experience on a mobile energy budget. The key insight is that the traditional interfaces between different Web stacks need to be enhanced with new abstractions that express user QoS experience and that expose architectural-level complexities. On the basis of the enhanced interfaces, I propose synergistic cross-layer optimizations across the processor architecture, Web runtime, programming language, and application layers to maximize the whole system efficiency. The contributions made in this dissertation will likely have a long-term impact because the target application domain, the Web, is becoming a universal mobile development platform, and because our solutions target the fundamental computation layers of the Web domain.Electrical and Computer Engineerin

A phenomenological analysis of an instructional systems design creative project

This research paper is a phenomenological analysis of a creative project involving University of Northern Iowa undergraduate art students in the planning and creation of visual illustrations, graphic design concepts, .html documents, and imagery for a world wide web intranet/lnternet virtual space. This analysis looks at instructional design as a creative process and the phenomenology of the UNI Art/Cat (Art Resources Technology/Computer Assisted Training) computer laboratory. The mission, goals, and objectives of the creative project, experiential and experimental philosophies of education, and the phenomenologies of the instructional design process are the main considerations. The methodology of this thesis is primarily concerned with action research and research as lived experience. The generational aspects of computer hardware and software and the affective aspects of the evolution of the infrastructure upon instructional development is examined. This generation of techno-apparatus includes the Macintosh G3 Personal Computer in a network environment, Afga and Hewlett Packard Flatbed Scanners, Polaroid Slide Scanners, Adobe Graphic Design Software, and Symantec Visual Page Web Design Software. Commentary on the social and bureaucratic considerations in this particular creative project and discussion of the collaboration with UNI Art Department administration, faculty, and students is included with the final conclusions and recommendations