Download or read book Optimizing Locality and Parallelism Through Program Reorganization written by Sriram Krishnamoorthy and published by . This book was released on 2008 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Development of scalable application codes requires an understanding and exploitation of the locality and parallelism in the computation. This is typically achieved through optimizations by the programmer to match the application characteristics to the architectural features exposed by the parallel programming model. Partitioned address space programming models such as MPI foist a process-centric view of the parallel system, increasing the complexity of parallel programming. Typical global address space models provide a shared memory view that greatly simplifies programming. But the simplified models abstract away the locality information, precluding optimized implementations. In this work, we present techniques to reorganize program execution to optimize locality and parallelism, with little effort from the programmer. For regular loop-based programs operating on dense multi-dimensional arrays, we propose an automatic parallelization technique that attempts to determine a parallel schedule in which all processes can start execution in parallel. When the concurrent tiled iteration space inhibits such execution, we present techniques to re-enable it. This is an alternative to incurring the pipelined startup overhead in schedules generated by prevalent approaches. For less structured programs, we propose a programming model that exposes multiple levels abstraction to the programmer. These abstractions enable quick prototyping coupled with incremental optimizations. The data abstraction provides a global view of distributed data organized as blocks. A block is a subset of data stored contiguously in a single process' address space. The computation is specified as a collection of tasks operating on the data blocks, with parallelism and dependence being specified between them. When the blocking of the data does not match the required access pattern in the computation, the data needs to be reblocked to improve spatial locality. We develop efficient data layout transformation mechanisms for blocked multi-dimensional arrays. We also present mechanisms for automatic management of load balance, disk I/O, and inter-process communication on computations expressed as sets of independent tasks on blocked data stored on disk.
Download or read book Optimizing for Parallelism and Data Locality written by Rice University. Dept. of Computer Science and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Previous research has used program transformation to introduce parallelism and to exploit data locality. Unfortunately, these two objectives have usually been considered independently. This work explores the trade-offs between effectively utilizing parallelism and memory hierarchy on shared-memory multiprocessors. We present a simple, but suprisingly accurate, memory model to determine cache line reuse from both multiple accesses to the same memory location and from consecutive memory access. The model is used in memory optimizing and loop parallelization algorithms that effectively exploit data locality and parallelism in concert. We demonstrate the efficacy of this approach with very encouraging experimental results."
Download or read book Optimizing Parallel Programs Using Composable Locality Models written by Hao Luo and published by . This book was released on 2017 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: "On modern processors, the on-chip cache memory is structured in a hierarchy, in order to accommodate the rapidly growing disparity between processor peak speed and off-chip memory speed. This design makes a program's performance highly correlated with its memory access pattern and where the accessed data are positioned within the hierarchy. Locality analysis is to study such correlation and optimize programs accordingly. However, the existing research effort in locality analysis is rather limited when dealing with contemporary parallel workloads. The performance of these workloads can be significantly influenced by how their threads interactively access data. The state of the art in locality analysis is neither sufficient nor efficient in modeling such interaction. Therefore, in this dissertation, I will present a set of locality models to analyze modern parallel workloads. The new models give insights on how the threads share data on a quantitative basis. They have a common property, composability, which makes predicting cache miss ratio extremely efficient, especially for a large number of thread and data placements. I will also show how these models enable new optimizations that significantly improve the performance of GPU applications and parallel workloads on NUMA systems."--Page x.
Download or read book Parallel and Distributed Processing written by José D. P. Rolim and published by Springer Science & Business Media. This book was released on 1999-03-30 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of 11 IPPS/SPDP '98 Workshops held in conjunction with the 13th International Parallel Processing Symposium and the 10th Symposium on Parallel and Distributed Processing in San Juan, Puerto Rico, USA in April 1999. The 126 revised papers presented were carefully selected from a wealth of papers submitted. The papers are organised in topical sections on biologically inspired solutions to parallel processing problems: High-Level Parallel Programming Models and Supportive Environments; Biologically Inspired Solutions to Parallel Processing; Parallel and Distributed Real-Time Systems; Run-Time Systems for Parallel Programming; Reconfigurable Architectures; Java for Parallel and Distributed Computing; Optics and Computer Science; Solving Irregularly Structured Problems in Parallel; Personal Computer Based Workstation Networks; Formal Methods for Parallel Programming; Embedded HPC Systems and Applications.
Download or read book The Data Parallel Programming Model written by Guy-Rene Perrin and published by Springer Science & Business Media. This book was released on 1996-09-11 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph-like book assembles the thorougly revised and cross-reviewed lectures given at the School on Data Parallelism, held in Les Menuires, France, in May 1996. The book is a unique survey on the current status and future perspectives of the currently very promising and popular data parallel programming model. Much attention is paid to the style of writing and complementary coverage of the relevant issues throughout the 12 chapters. Thus these lecture notes are ideally suited for advanced courses or self-instruction on data parallel programming. Furthermore, the book is indispensable reading for anybody doing research in data parallel programming and related areas.
Download or read book Applied Parallel Computing written by Jack Dongarra and published by Springer Science & Business Media. This book was released on 2006-03-03 with total page 1195 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 7th International Conference on Applied Parallel Computing, PARA 2004, held in June 2004. The 118 revised full papers presented together with five invited lectures and 15 contributed talks were carefully reviewed and selected for inclusion in the proceedings. The papers are organized in topical sections.
Download or read book Languages and Compilers for Parallel Computing written by Keshav Pingali and published by Springer Science & Business Media. This book was released on 1995-01-26 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents revised versions of the 32 papers accepted for the Seventh Annual Workshop on Languages and Compilers for Parallel Computing, held in Ithaca, NY in August 1994. The 32 papers presented report on the leading research activities in languages and compilers for parallel computing and thus reflect the state of the art in the field. The volume is organized in sections on fine-grain parallelism, align- ment and distribution, postlinear loop transformation, parallel structures, program analysis, computer communication, automatic parallelization, languages for parallelism, scheduling and program optimization, and program evaluation.
Download or read book Euro Par 2006 Parallel Processing written by Wolfgang E. Nagel and published by Springer Science & Business Media. This book was released on 2006-08-24 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 12th International Conference on Parallel Computing, Euro-Par 2006. The book presents 110 carefully reviewed, revised papers. Topics include support tools and environments; performance prediction and evaluation; scheduling and load balancing; compilers for high performance; parallel and distributed databases, data mining and knowledge discovery; grid and cluster computing: models, middleware and architectures; parallel computer architecure and instruction-level parallelism; distributed systems and algorithms, and more.
Download or read book Languages and Compilers for Parallel Computing written by Samuel P. Midkiff and published by Springer. This book was released on 2003-06-29 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the papers presented at the 13th International Workshop on Languages and Compilers for Parallel Computing. It also contains extended abstracts of submissions that were accepted as posters. The workshop was held at the IBM T. J. Watson Research Center in Yorktown Heights, New York. As in previous years, the workshop focused on issues in optimizing compilers, languages, and software environments for high performance computing. This continues a trend in which languages, compilers, and software environments for high performance computing, and not strictly parallel computing, has been the organizing topic. As in past years, participants came from Asia, North America, and Europe. This workshop re?ected the work of many people. In particular, the members of the steering committee, David Padua, Alex Nicolau, Utpal Banerjee, and David Gelernter, have been instrumental in maintaining the focus and quality of the workshop since it was ?rst held in 1988 in Urbana-Champaign. The assistance of the other members of the program committee – Larry Carter, Sid Chatterjee, Jeanne Ferrante, Jans Prins, Bill Pugh, and Chau-wen Tseng – was crucial. The infrastructure at the IBM T. J. Watson Research Center provided trouble-free logistical support. The IBM T. J. Watson Research Center also provided ?nancial support by underwriting much of the expense of the workshop. Appreciation must also be extended to Marc Snir and Pratap Pattnaik of the IBM T. J. Watson Research Center for their support.
Download or read book Computing and Combinatorics written by Bin Fu and published by Springer. This book was released on 2011-07-18 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 17th Annual International Conference on Computing and Combinatorics, held in Dallas, TX, USA, in August 2011. The 54 revised full papers presented were carefully reviewed and selected from 136 submissions. Topics covered are algorithms and data structures; algorithmic game theory and online algorithms; automata, languages, logic, and computability; combinatorics related to algorithms and complexity; complexity theory; computational learning theory and knowledge discovery; cryptography, reliability and security, and database theory; computational biology and bioinformatics; computational algebra, geometry, and number theory; graph drawing and information visualization; graph theory, communication networks, and optimization; parallel and distributed computing.
Download or read book LCPC 97 written by David Sehr and published by Springer Science & Business Media. This book was released on 1997-06-11 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the thoroughly refereed post-workshop proceedings of the 9th International Workshop on Languages and Compilers for Parallel Computing, LCPC'96, held in San Jose, California, in August 1996. The book contains 35 carefully revised full papers together with nine poster presentations. The papers are organized in topical sections on automatic data distribution and locality enhancement, program analysis, compiler algorithms for fine-grain parallelism, instruction scheduling and register allocation, parallelizing compilers, communication optimization, compiling HPF, and run-time control of parallelism.
Download or read book Euro Par 96 Parallel Processing written by Luc Bouge and published by Springer Science & Business Media. This book was released on 1996-08-14 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: Content Description #Includes bibliographical references and index.
Download or read book Proceedings of the Fifth SIAM Conference on Parallel Processing for Scientific Computing written by J. J. Dongarra and published by SIAM. This book was released on 1992-01-01 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text gives the proceedings for the fifth conference on parallel processing for scientific computing.
Download or read book Languages and Compilers for Parallel Computing written by Siddharta Chatterjee and published by Springer. This book was released on 2003-06-26 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: LCPC’98 Steering and Program Committes for their time and energy in - viewing the submitted papers. Finally, and most importantly, we thank all the authors and participants of the workshop. It is their signi cant research work and their enthusiastic discussions throughout the workshopthat made LCPC’98 a success. May 1999 Siddhartha Chatterjee Program Chair Preface The year 1998 marked the eleventh anniversary of the annual Workshop on Languages and Compilers for Parallel Computing (LCPC), an international - rum for leading research groups to present their current research activities and latest results. The LCPC community is interested in a broad range of te- nologies, with a common goal of developing software systems that enable real applications. Amongthetopicsofinteresttotheworkshoparelanguagefeatures, communication code generation and optimization, communication libraries, d- tributed shared memory libraries, distributed object systems, resource m- agement systems, integration of compiler and runtime systems, irregular and dynamic applications, performance evaluation, and debuggers. LCPC’98 was hosted by the University of North Carolina at Chapel Hill (UNC-CH) on 7 - 9 August 1998, at the William and Ida Friday Center on the UNC-CH campus. Fifty people from the United States, Europe, and Asia attended the workshop. The program committee of LCPC’98, with the help of external reviewers, evaluated the submitted papers. Twenty-four papers were selected for formal presentation at the workshop. Each session was followed by an open panel d- cussion centered on the main topic of the particular session.
Download or read book Euro Par 2010 Parallel Processing written by Pasqua D'Ambra and published by Springer. This book was released on 2010-09-02 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation This book constitutes the refereed proceedings of the 16th International Euro-Par Conference held in Ischia, Italy, in August/September 2010. The 90 revised full papers presented were carefully reviewed and selected from 256 submissions. The papers are organized in topical sections on support tools and environments; performance prediction and evaluation; scheduling and load-balancing; high performance architectures and compilers; parallel and distributed data management; grid, cluster and cloud computing; peer to peer computing; distributed systems and algorithms; parallel and distributed programming; parallel numerical algorithms; multicore and manycore programming; theory and algorithms for parallel computation; high performance networks; and mobile and ubiquitous computing.
Download or read book Computational Science ICCS 2003 Part 3 written by Peter Sloot and published by Springer Science & Business Media. This book was released on 2003-05-22 with total page 1183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The four-volume set LNCS 2657, LNCS 2658, LNCS 2659, and LNCS 2660 constitutes the refereed proceedings of the Third International Conference on Computational Science, ICCS 2003, held concurrently in Melbourne, Australia and in St. Petersburg, Russia in June 2003. The four volumes present more than 460 reviewed contributed and invited papers and span the whole range of computational science, from foundational issues in computer science and algorithmic mathematics to advanced applications in virtually all application fields making use of computational techniques. These proceedings give a unique account of recent results in the field.
Download or read book The Compiler Design Handbook written by Y.N. Srikant and published by CRC Press. This book was released on 2002-09-25 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread use of object-oriented languages and Internet security concerns are just the beginning. Add embedded systems, multiple memory banks, highly pipelined units operating in parallel, and a host of other advances and it becomes clear that current and future computer architectures pose immense challenges to compiler designers-challenges th
