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distributed-Memory FastFlow Building Blocks

INTERNATIONAL JOURNAL OF PARALLEL programming 2023年第1期51卷 1-21页

作者： Tonci, Nicolo Torquati, Massimo Mencagli, Gabriele Danelutto, Marco Univ Pisa Comp Sci Dept Pisa Italy

We present the new distributed-memory run-time system (RTS) of the C++-based open-source structured parallel programming library FastFlow. The new RTS enables the execution of FastFlow shared-memory applications written using its Building Blocks (BBs) on distributed systems with minimal changes to the original program. The changes required are all high-level and deal with introducing distributed groups (dgroup), i.e., logical partitions of the BBs composing the application streaming graph. A dgroup, which in turn is implemented using FastFlow's BBs, can be deployed and executed on a remote machine and communicate with other dgroups according to the original shared-memory FastFlow streaming programming model. We present how to define the distributed groups and how we faced the problem of data serialization and communication performance tuning through transparent messages' batching and their scheduling. Finally, we present a study of the overhead introduced by dgroups considering some benchmarks on a sixteen-node cluster.

关键词： High-level parallel programming distributed programming Parallel patterns Algorithmic skeletons Building blocks

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TRANSLATION AND EXECUTION OF distributed ADA PROGRAMS - IS IT STILL ADA

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IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 1989年第3期15卷 281-292页

作者： VOLZ, RA MUDGE, TN BUZZARD, GD KRISHNAN, P UNIV MICHIGAN DEPT ELECT ENGN & COMP SCIROBOT RES LABANN ARBORMI 48109 USN POSTGRAD SCHMONTEREYCA 93940

distributed execution of a single program is becoming increasingly important for embedded real-time systems. The single program approach to distributed programming allows the advantages of language level software engineering developments to be fully realized across machine boundaries. This paper examines some of the fundamental issues and tradeoffs involved in the translation and execution of programs written in the Ada language and intended for distributed execution. The memory access architecture, binding time and degree of system homogeneity are the three basic dimensions in terms of which target systems can be described. Library subprograms and library packages are identified as natural distributable units of the language. The program to process/memory mapping and the unit of the language to be distributed are the key issues in the distribution of Ada. The implications of various alternatives for these are analyzed. [ABSTRACT FROM AUTHOR]

关键词： distributed programming Index Terms-Ada programming languages real-time systems

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Solving Einstein's equations on supercomputers

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COMPUTER 1999年第12期32卷 52-+页

作者： Allen, G Goodale, T Lanfermann, G Radke, T Seidel, E Benger, W Hege, HC Merzky, A Massó, J Shalf, J Max Planck Inst Gravitat Phys Cactus Dev Team Potsdam Germany Max Planck Inst Gravitat Phys TIKSL Project Potsdam Germany Univ Illinois Dept Astron Urbana IL 61801 USA Univ Illinois Dept Phys Urbana IL 61801 USA Konrad Zuse Ctr Informat Technol Sci Visualizat Dept Berlin Germany Univ Balearic Isl Palma de Mallorca Spain Natl Ctr Supercomp Applicat Visualizat & Virtual Environm Grp Urbana IL USA Washington Univ Dept Phys St Louis MO 63130 USA

In 1916, Albert Einstein published his famous general theory of relativity, which contains the rules of gravity and provides the basis for modern theories of astrophysics and cosmology. For many years, physicists, astrophysicists, and mathematicians have striven to develop techniques for unlocking the secrets contained in Einstein's theory of gravity;more recently, computational-science research groups have added their expertise to the endeavor Because the underlying scientific project provides such a demanding and rich system for computational science,techniques developed to solve Einstein's equations will apply immediately to a large family of scientific and engineering problems. The authors have developed a collaborative computational framework that allows remote monitoring and visualization of simulations, at the center of which lies a community code called Cactus. Many researchers in the general scientific computing community have already adopted Cactus, as have numerical relativists and astrophysicists. This past June, an international team of researchers at various sites ran some of the largest such simulations in numerical relativity yet undertaken, using a 256 processor SGI Origin 2000 supercomputer at NCSA.

关键词： Cactus Einstein field equations SGI Origin 2000 supercomputer astronomy computing astrophysics black holes collaborative computational framework colliding black holes community code computational science computer graphics cosmology digital simulation distributed programming engineering problems general relativity equations globally distributed scientific teams gravity numerical analysis numerical relativity physics computing remote monitoring remote visualization scientific computing scientific problems visual simulations

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Reducing distributed JR program start-up time via extending JR's operation abstraction

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2018年第14期30卷 e4428-e4428页

作者： Olsson, Ronald A. Keen, Aaron W. Williamson, Todd Univ Calif Davis Dept Comp Sci Davis CA 95616 USA Calif Polytech State Univ San Luis Obispo Comp Sci & Software Engn Dept San Luis Obispo CA 93407 USA

This paper shows how to simplify and speed up distributed JR program start-up. We accomplish this goal by extending JR's operation abstraction so that it includes the creation of virtual machines and remote objects, the key components in distributed JR programs. This extension is conceptually simple, fits well with the rest of the JR language, and provides additional flexibility. Extending JR's operation abstraction yields a considerably less complex solution and a simpler implementation than other approaches, which would have led to redundant or ad-hoc language mechanisms. The extension also allows for reduced distributed JR program start-up costs because the creation of virtual machines and remote objects can now be done in parallel. This paper also describes how we have simulated this extension and have implemented a prototype that provides this extension. These reflect closely what we would need to do to actually include the extension within the standard JR implementation. Using the simulation and prototype, we obtained performance data on a few typical distributed applications written to use the extension. The data show large reductions, ranging from about 50% to 95%, in distributed JR program start-up times. Our experiments also explored a few strategies to further reduce start-up times, but, among our strategies, the straightforward strategies seem the best. This paper also discusses design alternatives for creating virtual machines and remote objects. Our experience suggests that the proposed extension to JR's operation abstraction is actually worthwhile to add to the standard JR language and implementation.

关键词： collective communication concurrency distributed programming JR programming language program start-up virtual machine creation

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Teaching distributed multidisciplinary software development

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IEEE SOFTWARE 2002年第5期19卷 86-+页

作者： Burnell, LJ Priest, JW Durrett, JR Texas Christian Univ Dept Comp Sci Ft Worth TX 76129 USA Univ Texas Dept Ind & Manufacturing Syst Engn Arlington TX 76019 USA Texas Tech Univ Area Informat Syst & Quantitat Sci Lubbock TX 79409 USA

Teaching distributed Multidisciplinary Software Development by Lisa J. Burnell, John W Priest, and John R. Durrett, pp. 86-93. To create a more realistic distributed collaborative environment, three Texas universities developed an innovative method for teaching collaborative software development in distributed multidisciplinary environments.

关键词： software engineering computer science education teaching distributed programming groupware software development collaborative software distributed multidisciplinary software education Texas Christian University University of Texas computer software Software engineering Groupware Pedagogy Collaborative software distributed software Texas Teaching computer science education

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THE EVOLUTION OF THE SR LANGUAGE

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distributed COMPUTING 1986年第3期1卷 133-149页

作者： ANDREWS, GR OLSSON, RA 1. Department of Computer Science The University of Arizona 85721 Tucson AZ USA

As a result of our experience, the SR distributed programming language has evolved. One change is that resources and processes are now dynamic rather than static. Another change is that operations and processes are now integrated in a novel way: all the mechanisms for process interaction — remote and local procedure call, rendezvous, dynamic process creation, and asynchronous message passing — are expressed in similar ways. This paper explains the rationale for these and other changes. We examine the fundamental issues faced by the designers of any distributed programming language and consider the ways in which these issues could be addressed. Special attention is given to the design objectives of expressiveness, simplicity, and efficiency.

关键词： distributed programming programming languages Operating systems Synchronization

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Computer controls for the WITCH experiment

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NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 2011年第1期629卷 396-405页

作者： Tandecki, M. Beck, D. Beck, M. Brand, H. Breitenfeldt, M. De Leebeeck, V. Friedag, P. Herlert, A. Kozlov, V. Mader, J. Roccia, S. Soti, G. Traykov, E. Van Gorp, S. Wauters, F. Weinheimer, Ch. Zakoucky, D. Severijns, N. Katholieke Univ Leuven Inst Kern & Stralingsfys B-3001 Louvain Belgium GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany Univ Munster Inst Kernphys D-48149 Munster Germany CERN CH-1211 Geneva 23 Switzerland Karlsruhe Inst Technol Inst Kernphys D-76021 Karlsruhe Germany ASCR Nucl Phys Inst CZ-25068 Rez Czech Republic

The WITCH experiment is a medium-scale experimental set-up located at ISOLDE/CERN. It combines a double Penning trap system with,a retardation spectrometer for energy measurements of recoil ions from beta decay. For a correct operation of such a set-up a whole range of different devices is required. Along with the installation and optimization of the set-up a computer control system was developed to control these devices. The CS-Framework that is developed and maintained at GSI, was chosen as a basis for this control system as it is perfectly suited to handle the distributed nature of a control *** report here on the required hardware for WITCH, along with the basis of this CS-Framework and the add-ons that were implemented for WITCH. (C) 2010 Elsevier B.V. All rights reserved.

关键词： LabVIEW Control system distributed programming Penning traps

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An autonomous blockchain-based workflow execution broker for e-science

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CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS 2024年第8期27卷 10235-10244页

作者： Alimoglu, Alper Ozturan, Can Bogazici Univ Dept Comp Engn Istanbul Turkiye

Scientific workflows are essential for many applications, enabling the configuration and execution of complex tasks across distributed resources. In this paper, we contribute an Ethereum blockchain-based scientific workflow execution manager, which distributes workflows to run on cluster computing providers that utilize the Slurm workload manager to execute them. We extended our blockchain-based autonomous resource broker called eBlocBroker, which is a DAO-based decentralized coordinator, by providing distributed workflow execution via blockchain. Through various tests, we demonstrate how our eBlockBroker autonomous organization, which is programmed as a smart contract, can manage scientific workflow submission, scheduling, and execution on cluster computing providers. The utilization of blockchain for distributed workflow execution is a new concept. We are motivated because our system has been developed with e-Science in mind where scientific workflows are widely utilized.

关键词： Blockchain Scheduling Cloud distributed programming Partitioning Cluster computing

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Improving NASA's Multiscale Modeling Framework for Tropical Cyclone Climate Study

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COMPUTING IN SCIENCE & ENGINEERING 2013年第5期15卷 56-67页

作者： Shen, Bo-Wen Nelson, Bron Cheung, Samson Tao, Wei-Kuo Univ Maryland College Pk MD 20742 USA NASA Goddard Space Flight Ctr Greenbelt MD 20771 USA

One of the current challenges in tropical cyclone research is how to improve our understanding of TCs' interannual variability as well as climate change's impact. Modern advances in global modeling, visualization, and supercomputing technologies at NASA show potential, but scalability is an issue. Recent improvements to the multiscale modeling framework make long-term TC-resolving simulations much more feasible.

关键词： Atmospheric Movements Data Handling Finite Volume Methods Geophysics Computing Learning Artificial Intelligence Meteorology Parallel Processing Resource Allocation Scalability Revised Parallel Implementation Load Balancing Intelligent Process Mapping 2 D Data Decomposition 1 D Data Decomposition GCE Goddard Cumulus Ensemble Model Fv GCM Finite Volume General Circulation Model Long Term TC Resolving Simulations MMF Supercomputing Technology Visualization Technology Global Modeling Technology Climate Change NASA Multiscale Modeling Framework National Aeronautics And Space Administration Tropical Cyclone Climate Study TC Research TC Interannual Variability Atmospheric Modeling Clouds Computational Modeling NASA Meteorology Hurricanes Tropical Cyclones NASA distributed programming Hurricane Modeling Climate Modeling Software Software Engineering Scientific Computing

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Network distributed finite element analysis

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ADVANCES IN ENGINEERING SOFTWARE 1996年第2-3期25卷 267-280页

作者： Chadha, HS Baugh, JW Department of Civil Engineering North Carolina State University Raleigh NC 27695 USA

The widespread availability of local-area networks has made the combined processing power of workstations a viable approach for compute-intensive analyses. In this paper, we describe several distributed algorithms for structural analysis using finite element methods, and we assess their performance on a conventional Ethernet-connected workstation network. Direct, iterative and hybrid equation solvers are evaluated for their performance on plane-elasticity problems, and are contrasted with respect to overall solution time and efficiency in distributing computations over a network. Equations modeling the costs of network communication and structural analysis computations are derived, and are subsequently used to predict the performance of several variations on the implemented algorithms. Our results show that each of the methods performs well on network architectures, and in particular that, while direct methods usually minimize network communication, certain iterative and hybrid methods can often be used to minimize overall solution time. Copyright (C) 1996 Civil-Comp Limited and Elsevier Science Limited.

关键词： distributed programming concurrent algorithms direct and iterative equation solvers computer networks finite element analysis

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