Performance measurement and analysis of PC based cluster server using SET of Architecture and modeling a scalable High performance cluster

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Parallel machine architecture and compiler design facilities

The objective is to provide an integrated simulation environment for studying and evaluating various issues in designing parallel systems, including machine architectures, parallelizing compiler techniques, and parallel algorithms. The status of Delta project (which objective is to provide a facility to allow rapid prototyping of parallelized compilers that can target toward different machine architectures) is summarized. Included are the surveys of the program manipulation tools developed, the environmental software supporting Delta, and the compiler research projects in which Delta has played a role

The exploitation of parallelism on shared memory multiprocessors

PhD ThesisWith the arrival of many general purpose shared memory multiple processor (multiprocessor) computers into the commercial arena during the mid-1980's, a rift has opened between the raw processing power offered by the emerging hardware and the relative inability of its operating software to effectively deliver this power to potential users. This rift stems from the fact that, currently, no computational model with the capability to elegantly express parallel activity is mature enough to be universally accepted, and used as the basis for programming languages to exploit the parallelism that multiprocessors offer. To add to this, there is a lack of software tools to assist programmers in the processes of designing and debugging parallel programs. Although much research has been done in the field of programming languages, no undisputed candidate for the most appropriate language for programming shared memory multiprocessors has yet been found. This thesis examines why this state of affairs has arisen and proposes programming language constructs, together with a programming methodology and environment, to close the ever widening hardware to software gap. The novel programming constructs described in this thesis are intended for use in imperative languages even though they make use of the synchronisation inherent in the dataflow model by using the semantics of single assignment when operating on shared data, so giving rise to the term shared values. As there are several distinct parallel programming paradigms, matching flavours of shared value are developed to permit the concise expression of these paradigms.The Science and Engineering Research Council

The NASA computer science research program plan

A taxonomy of computer science is included, one state of the art of each of the major computer science categories is summarized. A functional breakdown of NASA programs under Aeronautics R and D, space R and T, and institutional support is also included. These areas were assessed against the computer science categories. Concurrent processing, highly reliable computing, and information management are identified

User-directed Vectorization in OmpSs

In the recent shift to the multi-core and many-core era, where systems tend to be heterogeneous even at chip level, SIMD instruction sets and accelerators that exploit parallelism in a similar way are coming into prominence in new multiprocessors and systems. This heterogeneity, even at chip level, is causing a lot of trouble to compilers and parallel programming models in terms of being able to maximize the profitability of the computational resources in an easy, generic, efficient and portable fashion. Although a lot of work on automatic vectorization/simdization techniques has been done over the years, compilers show important limitations when vectorizing code with pointers and function calls because of the traditional compiler analysis limitations, such as those in pointers aliasing analysis. Concerning parallel programming models, some of them are restricted to specific architectures while other portable ones, such as OpenCL, require programmers to face low-level architecture details and hard source code transformations, presenting important performance problems among different architectures, which requires new tuning efforts. In an attempt to offer a unified and generic solution to the auto-vectorization/simdization and portability problems, we propose User-directed Vectorization in OmpSs, a high-level programming model extension that offers developers the possibility to easily guide the compiler in the vectorization process just introducing some simple notations on the vectorizable areas of the code, such loops and functions. We focused our particular design, implementation and evaluation on the Intel SSE instruction set for CPUs, getting the same or higher speed-ups than using the GCC compiler auto-vectorization in easily-vectorizable codes, and a performance improvement of up to 2.30 in more complex codes where GCC is not able to apply auto-vectorization and the hand-coded OpenCL version reaches a speed-up of 2.23

NASA high performance computing and communications program

The National Aeronautics and Space Administration's HPCC program is part of a new Presidential initiative aimed at producing a 1000-fold increase in supercomputing speed and a 100-fold improvement in available communications capability by 1997. As more advanced technologies are developed under the HPCC program, they will be used to solve NASA's 'Grand Challenge' problems, which include improving the design and simulation of advanced aerospace vehicles, allowing people at remote locations to communicate more effectively and share information, increasing scientist's abilities to model the Earth's climate and forecast global environmental trends, and improving the development of advanced spacecraft. NASA's HPCC program is organized into three projects which are unique to the agency's mission: the Computational Aerosciences (CAS) project, the Earth and Space Sciences (ESS) project, and the Remote Exploration and Experimentation (REE) project. An additional project, the Basic Research and Human Resources (BRHR) project exists to promote long term research in computer science and engineering and to increase the pool of trained personnel in a variety of scientific disciplines. This document presents an overview of the objectives and organization of these projects as well as summaries of individual research and development programs within each project