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Symbolic Parallelization Of Nested Loop Programs

Author : Alexandru-Petru Tanase
ISBN : 9783319739090
Genre : Technology & Engineering
File Size : 45. 9 MB
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This book introduces new compilation techniques, using the polyhedron model for the resource-adaptive parallel execution of loop programs on massively parallel processor arrays. The authors show how to compute optimal symbolic assignments and parallel schedules of loop iterations at compile time, for cases where the number of available cores becomes known only at runtime. The compile/runtime symbolic parallelization approach the authors describe reduces significantly the runtime overhead, compared to dynamic or just‐in-time compilation. The new, on‐demand fault‐tolerant loop processing approach described in this book protects loop nests for parallel execution against soft errors.

Symbolic Analysis Techniques For Effective Automatic Parallelization

Author : William Joseph Blume
ISBN : UIUC:30112121898123
Genre : Evaluation
File Size : 29. 6 MB
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To effectively translate real programs written in standard, sequential languages into parallel computer programs, parallelizing compilers need advanced techniques such as powerful dependence tests, array privatization, generalized induction variable substitution, and reduction parallelization. All of these techniques need or can benefit from symbolic analysis. To determine what kinds of symbolic analysis techniques can significantly improve the effectiveness of parallelizing Fortran compilers, we compared the automatically and manually parallelized versions of the Perfect Benchmarks. The techniques identified include: data dependence tests for nonlinear expressions, constraint propagation, interprocedural constant propagation, array summary information, and run time tests. We have developed algorithms for two of these identified symbolic analysis techniques: nonlinear data dependence analysis and constraint propagation. For data dependence analysis nonlinear expressions, (e.g., A(n * i + j), where $1 le j le n), $ we developed a data dependence test called the Range Test. The Range Test proves independence by determining whether certain symbolic inequalities hold for a logical permutation of the loop nest. We use a technique called Range Propagation to prove these symbolic inequalities. For constraint propagation, we developed a technique called Range Propagation. Range Propagation computes the range of values that each variable can take at each point of a program. A range is a symbolic lower and upper bound on the values taken by a variable. Range propagation also includes a facility to compare arbitrary expressions under the constraints imposed by a set of ranges. We have developed both a simple but slow algorithm and a fast and demand-driven but complex algorithm to compute these ranges. The Range Test and Range Propagation have been fully implemented in Polaris, a parallelizing compiler being developed at the University of Illinois. We have found that these techniques significantly improve the effectiveness of automatic parallelization. We have also found that these techniques are reasonably efficient.

Symbolic Analysis For Parallelizing Compilers

Author : Mohammad R. Haghighat
ISBN : 9780585268293
Genre : Computers
File Size : 23. 84 MB
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In Symbolic Analysis for Parallelizing Compilers the author presents an excellent demonstration of the effectiveness of symbolic analysis in tackling important optimization problems, some of which inhibit loop parallelization. The framework that Haghighat presents has proved extremely successful in induction and wraparound variable analysis, strength reduction, dead code elimination and symbolic constant propagation. The approach can be applied to any program transformation or optimization problem that uses properties and value ranges of program names. Symbolic analysis can be used on any transformational system or optimization problem that relies on compile-time information about program variables. This covers the majority of, if not all optimization and parallelization techniques. The book makes a compelling case for the potential of symbolic analysis, applying it for the first time - and with remarkable results - to a number of classical optimization problems: loop scheduling, static timing or size analysis, and dependence analysis. It demonstrates how symbolic analysis can solve these problems faster and more accurately than existing hybrid techniques.

Transforming For Parallelism Using Symbolic Summarization

Author : Oliver Joseph Sharp
ISBN : UCAL:C3388589
Genre : Compilers (Computer programs)
File Size : 64. 95 MB
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Official Gazette Of The United States Patent And Trademark Office

Author :
ISBN : PSU:000043042791
Genre : Patents
File Size : 69. 11 MB
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Languages And Compilers For Parallel Computing

Author : Utpal Banerjee
ISBN : 3540575022
Genre : Computers
File Size : 74. 5 MB
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The articles in this volume are revised versions of the best papers presented at the Fifth Workshop on Languages and Compilers for Parallel Computing, held at Yale University, August 1992. The previous workshops in this series were held in Santa Clara (1991), Irvine (1990), Urbana (1989), and Ithaca (1988). As in previous years, a reasonable cross-section of some of the best work in the field is presented. The volume contains 35 papers, mostly by authors working in the U.S. or Canada but also by authors from Austria, Denmark, Israel, Italy, Japan and the U.K.

Programming Models For Massively Parallel Computers 1993

Author : Wolfgang Giloi
ISBN : 0818649011
Genre : Parallel computers
File Size : 68. 7 MB
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Proceedings -- Parallel Computing.

Automatic Array Privatization And Demand Driven Symbolic Analysis

Author : Peng Tu
ISBN : UIUC:30112027534483
Genre : Array processors
File Size : 54. 12 MB
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Proceedings Of 1992 International Conference On Parallel Processing

Author : Kang G. Shin
ISBN : 0849307821
Genre : Computers
File Size : 81. 39 MB
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The second of a three-volume compendium which represents the proceedings from the 1992 International Conference on Parallel Processing. This book covers software. Volumes I and III cover the topics of architecture and algorithms respectively, and are intended for computer professionals in parallel processing, distributed systems and software engineering.

Parallel Programming And Java

Author : World Occam and Transputer User Group. Technical Meeting
ISBN : STANFORD:36105023137529
Genre : Java (Computer program language)
File Size : 72. 41 MB
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Proceedings Of The Fifth Distributed Memory Computing Conference

Author : David W. Walker
ISBN : 0818621133
Genre : Computer storage devices
File Size : 72. 25 MB
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Conference Proceedings

Author :
ISBN : UOM:39015040285259
Genre : Supercomputers
File Size : 64. 82 MB
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Conference Proceedings Of The 1998 International Conference On Supercomputing

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ISBN : CORNELL:31924083865679
Genre : Electronic digital computers
File Size : 43. 94 MB
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Proceedings -- Parallel Computing.

Algorithms And Parallel Vlsi Architectures Ii

Author : Patrice Quinton
ISBN : UOM:39015026921620
Genre : Computers
File Size : 69. 15 MB
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Since the emergence of VLSI, the relationship between the development of parallel algorithms and the design of special-purpose architecture has always been of major concern. The analysis of this relationship is the main topic of this book. Hardware and software issues closely depend upon one another and cannot be solved independently. Beyond the natural complexity of algorithm design, the designer has to face that of choosing the appropriate technology medium for its efficient realization. The dramatic developments in VLSI technology now offers extraordinary opportunities for implementing complex applications. As application specific/systems can offer 100 to 1000-fold improvements in cost/performance over general purpose computers on applications, they are attracting increasing attention in both academic and industrial communities. Highly specialized application-specific arrays of processors, which are the targeted architectures in this book, are extremely appealing. The papers in this volume give a thorough overview on current research in the areas of parallel algorithms, synthesis methods, VLSI architectures, and design tools.

Architecture Independent Loop Parallelisation

Author : Radu C. Calinescu
ISBN : STANFORD:36105028630320
Genre : Computers
File Size : 89. 31 MB
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Architecture-independent programming and automatic parallelisation have long been regarded as two different means of alleviating the prohibitive costs of parallel software development. Building on recent advances in both areas, Architecture-Independent Loop Parallelisation proposes a unified approach to the parallelisation of scientific computing code. This novel approach is based on the bulk-synchronous parallel model of computation, and succeeds in automatically generating parallel code that is architecture-independent, scalable, and of analytically predictable performance.

1998 International Conference On Parallel And Distributed Systems

Author : IEEE Computer Society. TC on Distributed Processing
ISBN : UCSC:32106014244674
Genre : Computers
File Size : 27. 37 MB
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Proceedings of the December 1998 conference. One hundred contributions cover architecture, mobile computing, Internet technology, database systems and applications, multimedia, interconnection network, high-speed networking, parallel/distributed computing and system supports, fault tolerance/real time, and compilation for parallelism. Contains an author list but no subject index. Annotation copyrighted by Book News, Inc., Portland, OR.

Proceedings Of The 1993 International Conference On Parallel Processing

Author : Alok N. Choudhary
ISBN : 0849389852
Genre : Computers
File Size : 51. 54 MB
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This three-volume work presents a compendium of current and seminal papers on parallel/distributed processing offered at the 22nd International Conference on Parallel Processing, held August 16-20, 1993 in Chicago, Illinois. Topics include processor architectures; mapping algorithms to parallel systems, performance evaluations; fault diagnosis, recovery, and tolerance; cube networks; portable software; synchronization; compilers; hypercube computing; and image processing and graphics. Computer professionals in parallel processing, distributed systems, and software engineering will find this book essential to their complete computer reference library.

Languages And Compilers For Parallel Computing

Author :
ISBN : UOM:39015058296081
Genre : Compilers (Computer programs)
File Size : 44. 96 MB
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Parallel Scheduling Of Recursively Defined Arrays

Author : Institute for Computer Applications in Science and Engineering
ISBN : NASA:31769000675564
Genre :
File Size : 88. 4 MB
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Applications In Parallel And Distributed Computing

Author : Claude Girault
ISBN : STANFORD:36105009238572
Genre : Reference
File Size : 45. 49 MB
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Applications in parallel and distributed computing are gaining increasing impact because they are the key to the co-operation, and even integration, of large organizations and services. The ever-growing demand of computations, the mass of related distributed information and reliability requirements have overtaken single machines, forcing the use of interconnected ones. This publication considers the many challenges and open problems raised by developments and discusses the new ideas, concepts and methods supported by new technologies.

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