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IEEE/ACM 2nd International Workshop on Software Architecture and Metrics (SAM)

作者： Rajan, Hridesh Iowa State Univ Sci & Technol Dept Comp Sci Ames IA 50010 USA

ISBN: (纸本)9781479919345

"Explicit concurrency should be abolished from all higher-level programming languages (i.e. everything except - perhaps-plain machine code.)." Dijkstra [1] (paraphrased). A promising class of concurrency abstractions replaces explicit concurrency mechanisms with a single linguistic mechanism that combines state and control and uses asynchronous messages for communications, e.g. active objects or actors, but that doesn't remove the hurdle of understanding non-local control transfer. What if the programming model enabled programmers to simply do what they do best, that is, to describe a system in terms of its modular structure and write sequential code to implement the operations of those modules and handles details of concurrency? In a recently sponsored NSF project we are developing such a model that we call capsule-oriented programming and its realization in the Panini project. This model favors modularity over explicit concurrency, encourages concurrency correctness by construction, and exploits modular structure of programs to expose implicit concurrency.

关键词： Capsules Concurrency abstraction Implicit concurrency Modular structure Modularity programming model

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dCUDA: Hardware Supported Overlap of Computation and Communication

dCUDA: Hardware Supported Overlap of Computation and Communi...

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International Conference on High Performance Computing, Networking, Storage and Analysis (SC)

作者： Gysi, Tobias Bar, Jeremia Hoefler, Torsten Swiss Fed Inst Technol Dept Comp Sci Zurich Switzerland

ISBN: (纸本)9781467388153

Over the last decade, CUDA and the underlying GPU hardware architecture have continuously gained popularity in various high-performance computing application domains such as climate modeling, computational chemistry, or machine learning. Despite this popularity, we lack a single coherent programming model for GPU clusters. We therefore introduce the dCUDA programming model, which implements device-side remote memory access with target notification. To hide instruction pipeline latencies, CUDA programs over-decompose the problem and over-subscribe the device by running many more threads than there are hardware execution units. Whenever a thread stalls, the hardware scheduler immediately proceeds with the execution of another thread ready for execution. This latency hiding technique is key to make best use of the available hardware resources. With dCUDA, we apply latency hiding at cluster scale to automatically overlap computation and communication. Our benchmarks demonstrate perfect overlap for memory bandwidth-bound tasks and good overlap for compute-bound tasks.

关键词： Distributed memory gpu latency hiding programming model remote memory access

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Understanding Performance Portability of SYCL Kernels: A Case Study with the All-Pairs Distance Calculation in Bioinformatics on GPUs

Understanding Performance Portability of SYCL Kernels: A Cas...

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37th IEEE International Parallel and Distributed Processing Symposium (IPDPS)

作者： Jin, Zheming Vetter, Jeffrey S. Oak Ridge Natl Lab Oak Ridge TN 37830 USA

ISBN: (纸本)9798350311990

SYCL is a portable programming model. Toward the goal of a better understanding of performance portability of SYCL kernels on GPUs, we select a bioinformatics kernel for computing the all-pairs distance as a case study. After migrating the kernel from CUDA to HIP and SYCL, we evaluate the performance of the CUDA, HIP, and SYCL kernels on NVIDIA V100 and AMD MI210 GPUs. We analyze the GPU instructions from the kernels to explain performance gaps between SYCL and CUDA/HIP. We hope that the findings are valuable for improving performance portability of SYCL.

关键词： Heterogeneous computing Performance portability programming model

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Business Process Oriented Platform-as-a-Service Framework for Process Instances Intensive Applications

Business Process Oriented Platform-as-a-Service Framework fo...

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26th IEEE International Parallel and Distributed Processing Symposium (IPDPS) / Workshop on High Performance Data Intensive Computing

作者： Zheng, Yongqing Pang, Jinshan Li, Jian Cui, Lizhen Shandong Univ Sch Comp Sci & Technol Shandong Prov Key Lab Software Engn Jinan Peoples R China

ISBN: (纸本)9780769546766

With the cloud computing becoming more and more popularity in both commercial and academic fields, platform-as-a Service (PaaS) becomes one of the core technologies for service provider to change the way of service-providing to both common users and scientific organization. This paper describes a business process oriented Platform-as-a-Service framework called BPPaaS including an integrated business process application programming model, and business process oriented Platform-as-a-Service middleware. BPPaaS can enable users to submit their business process logic source code programmed by integrated business process programming language to this platform. And BPPaaS will parse the logic source code, extract the business process tasks and task-relationship to form meta-data, and encode business process tasks as standalone executable components. Since different cloud data center has specific data, BPPaaS will assign the business process tasks to the specific data center as task execution nodes, which have the necessary data required by tasks. A scheduling algorithm is introduced to supporting business process intensive application execution with multiple heterogeneous java runtime environments as the underling parallel computation platform. Finally, a case in social security application shows this framework can streamline complex computational business process.

关键词： PaaS business process programming model instance intensive application

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A DYNAMIC MILLS HERITAGE model WITH REPLACEABLE CAPITAL

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PAPERS OF THE REGIONAL SCIENCE ASSOCIATION 1990年第1期68卷 23-41页

作者： MOORE, JE WIGGINS, LL UNIV SO CALIF SCH URBAN & REG PLANNINGLOS ANGELESCA 90089 UNIV SO CALIF DEPT CIVIL ENGNLOS ANGELESCA 90089 MIT SCH ARCHITECTURE & PLANNINGCAMBRIDGEMA 02139

A general equilibrium, linear programming model of urban land use formulated in the heritage of Edwin Mills is reformulated for dynamic solution. This multiperiod extension identifies discontinuous land use as an optimal market strategy under reasonably general conditions of economic change. Information about future economic conditions is assumed to be complete, and capital is assumed to be replaceable at finite cost. As a result, land uses and export mixes adjust over time in response to exogenous shifts in export prices. It is noted that discontinuous land uses can constitute long-run outcomes, and a distinction is drawn between the assumptions associated with static and long-run perspectives.

关键词： General Condition Economic Condition programming model General Equilibrium Urban Land

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Component-based approach for programming and running scientific applications on grids and clouds

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INTERNATIONAL JOURNAL OF HIGH PERFORMANCE COMPUTING APPLICATIONS 2012年第3期26卷 275-295页

作者： Malawski, Maciej Gubala, Tomasz Bubak, Marian AGH Univ Sci & Technol Dept Comp Sci PL-30059 Krakow Poland Univ Notre Dame Ctr Res Comp Notre Dame IN 46556 USA ACC CYFRONET AGH Krakow Poland Univ Amsterdam Inst Informat Amsterdam Netherlands

This paper presents an approach to programming and running scientific applications on grid and cloud infrastructures based on two principles: the first one is to follow a component-based programming model, the second is to apply a flexible technology which allows for virtualization of the underlying infrastructure. The solutions described in this paper include high-level composition and deployment consisting of a scripting-based environment and a manager system based on an architecture description language (ADL), a dynamically managed pool of component containers, and interoperability with other component models such as Grid Component model (GCM). We demonstrate how the proposed methodology can be implemented by combining the unique features of the Common Component Architecture (CCA) model together with the H2O resource sharing platform, resulting in the MOCCA component framework. Applications and tests include data mining using the Weka library, Monte Carlo simulation of the formation of clusters of gold atoms, as well as a set of synthetic benchmarks. The conclusion is that the component approach to scientific applications can be successfully applied to both grid and cloud infrastructures.

关键词： cloud computing component programming distributed application grid computing programming model

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Improving the accessibility of NUMA-aware C plus plus application development based on the PGASUS framework

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CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE 2023年第14期35卷 p1-24页

作者： Plauth, Max Eberhardt, Felix Grapentin, Andreas Polze, Andreas Univ Potsdam Hasso Plattner Inst Digital Engn Potsdam Germany

Certain workloads such as in-memory databases are inherently hard to scale-out and rely on cache-coherent scale-up non-uniform memory access (NUMA) systems to keep up with the ever-increasing demand for compute resources. However, many parallel programming frameworks such as OpenMP do not make efficient use of large scale-up NUMA systems as they do not consider data locality sufficiently. In this work, we present PGASUS, a C++ framework for NUMA-aware application development that provides integrated facilities for NUMA-aware task parallelism and data placement. The framework is based on an extensive review of parallel programming languages and frameworks to incorporate the best practices of the field. In a comprehensive evaluation, we demonstrate that PGASUS provides average performance improvements of 1.56x and peak performance improvements of up to 4.67xacross a wide range of workloads.

关键词： non-uniform memory access programming model scale-up computing

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A Uniform Quantum Computing model based on Virtual Quantum Processors

A Uniform Quantum Computing Model based on Virtual Quantum P...

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IEEE International Conference on Web Services (ICWS) / IEEE World Congress on Services (IEEE SERVICES)

作者： Gesek, Georg QMware AG CTO Res & Dev Rorschach Switzerland

ISBN: (纸本)9781665416818

What else than Hybrid Quantum Computing will dominate data centers, just within a decade? But until now, it is unclear how precisely such high-performance computers will be constructed, even the fundamental functionality is in question. Thus, it is very hard to prepare today, from a programmer perspective, in-depth for the anticipated near-term programming paradigm shift due to quantum computers. Furthermore, the industry is reluctant to invest heavily into quantum software development right now, since under this uncertainty regarding the future development of hardware and Cloud services, no one would like to see all these efforts to be ruined by a novel technology, an unforeseen new machine, which Would eradicate the software in place, which the industry had developed so costly. This calls for a more generic view on Hybrid Quantum Computing, on one hand hardware agnostic, but still anticipating the fundamental laws of nature which rule ally future quantum computing system, regardless of its engineered excellence. This generalization can be done with the introduction of a Virtual Quantum Processor, a piece of imaginary hardware, which is described detailed enough, to emulate a generic hybrid quantum machine based on a set of instructions within a Turing machine. If this could be accomplished, we would retrieve a Uniform Computing model fin Hybrid Quantum Software, which can be applied later to any physical representation of quantum computing hardware, but would run already today on our current machines.

关键词： uniform hybrid quantum high-performance computing virtual processor programming model

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High-Performance Coarray Fortran Support with MVAPICH2-X: Initial Experience and Evaluation 29

High-Performance Coarray Fortran Support with MVAPICH2-X: In...

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29th IEEE International Parallel and Distributed Processing Symposium (IPDPS)

作者： Lin, Jian Hamidouche, Khaled Lu, Xiaoyi Li, Mingzhe Panda, Dhabaleswar K. (D K) Ohio State Univ Dept Comp Sci & Engn Columbus OH 43210 USA

ISBN: (纸本)9781467376846

Coarray Fortran (CAF) is a parallel programming paradigm that extends Fortran for the partitioned global address space (PGAS) programming model at the language level. The current runtime implementations of CAF are mainly using MPI or GASNet as underlying communication components. MVAPICH2-X is a hybrid MPI+PGAS programming library with a Unified Communication Runtime (UCR) design. In this paper, the classic implementation of CAF runtime in OpenUH is redesigned and rebuilt on top of MVAPICH2-X. The proposed design does not only enable the support of MPI+CAF hybrid programming model, but also provides superior performance on most of the CAF one-sided operations and the newly proposed collective operations in Fortran 2015 specification. A comprehensive evaluation with different benchmarks and applications has been performed. Comparing with current GASNet-based solutions, the CAF runtime with MVAPICH2-X can improve the bandwidths of put and bidirectional operations up to 3.5X for inter-node communication, and improve the bandwidths of collective communication operations represented by broadcast up to 3.0X on 64 processes. It also reduces the execution time of NPB CAF benchmarks by up to 18% on 256 processes.

关键词： CAF MPI MVAPICH2 PGAS programming model

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Analysis of component model extensions to support the GRICOL language

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Joint Workshop on Making Grids Works

作者： Bouziane, Hinde Currle-Linde, Natalia Perez, Christian Resch, Michael IRISA INRIA Campus Beaulieu F-35042 Rennes France Univ Stuttgart High Performance Comp Ctr Stuttgart HLRS Stuttgart Germany

ISBN: (纸本)9780387784472

Nowadays, programming grid applications is still a major challenge. Several systems, tools and environments have appeared to allow end-users to describe applications without dealing with the complexity of the grid infrastructure. An application description in such environments is done through high level languages such as the Grid Concurrent Language (GRICOL). Independently of the application domain, this language enables the description of highly complex scientific experiments. While such a high level language is offered to end-users, the question of how to implement it is raised. The contribution of this paper is to analyze the support of a GRICOL application within component models, in particular the support of its temporal composition represented by a control flow construction.

关键词： programming model software component programming language control-flow data-flow GriCoL

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