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International conference on parallel and distributed Systems (ICPADS)

作者： M. Ojstersek V. Zumer L. Pipan The Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia The Faculty of Electrical and Computer Engineering University of Ljubljana Ljubljana Slovenia

Almost all coarse grained program graph nodes don't need all of their input operands at the beginning of their execution. Thereafter they can be scheduled a bit earlier. This type of program graph nodes triggering is called partial strict triggering. The missing operands will be requested later during the execution. Coarse grained program graph nodes send their output operand to all successors, as soon as they produce them. Successors of coarse grained program graph nodes will be scheduled earlier too, because they will receive their input operands sooner. An evaluation of improved CPM, VL and DSH scheduling algorithms is done in this paper. We have improved them with partial strict triggering of coarse grained program graph nodes.

关键词： Processor scheduling Scheduling algorithm Partitioning algorithms Dynamic scheduling Concurrent computing Clustering algorithms Multiprocessing systems Topology Computer science Computational complexity

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A multiprocessor scheduling heuristic for functional parallelism and its performance measure

A multiprocessor scheduling heuristic for functional paralle...

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International conference on parallel and distributed Systems (ICPADS)

作者： D. Li A. Mizuno Y. Iwahori N. Ishii Educational Center of Information Processing Nagoya Institute of Technology Nagoya Japan Department of Intelligence and Computer Science Nagoya Institute of Technology Nagoya Japan Nagoya Kogyo Daigaku Nagoya Aichi JP

This paper addresses the following scheduling problem: given a precedence graph with communication costs and a machine architecture with different types of processors, construct a schedule that runs on the given architecture at the minimum possible execution time. The main contributions are: Firstly, we present a static scheduling algorithm that keeps processors idle for future important tasks and fills idle time slots incurred due to interprocessor communication. Secondly, to evaluate the effectiveness of the algorithm, we develop a lower bound on the length of a optimal schedule as a yardstick. Experiments show that this new approach produces better schedules and takes much less compile time.

关键词： Processor scheduling Optimal scheduling parallel processing Scheduling algorithm Costs Information processing Machine intelligence Computer science Computer architecture Concurrent computing

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Configurable hardware for symbolic search operations

Configurable hardware for symbolic search operations

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International conference on parallel and distributed Systems (ICPADS)

作者： Seonil Choi Yongwha Chung V.K. Prasana University of Southern California USA Systems Engineering Section Electronics and Telecommunications Research Institute Taejon South Korea

Most intermediate and high-level vision tasks manipulate symbolic data. A kernel operation in these vision tasks is to search symbolic data satisfying certain geometric constraints. Such operations are data-dependent and their memory access patterns are irregular. In this paper, we propose a fast parallel design for symbolic search operations using configurable hardware. Using a pointer array and a bit-level index array, we manipulate the symbolic data and show high performance can be achieved. Depending on the input data, a corresponding search window is calculated and symbolic search operations are performed in parallel. Performance estimates using 16 Xilinx XC6216s and memory modules are very promising. Given 3519 line segments (extracted from an 1024/spl times/1024 pixel image), the operation can be performed in 1.11 milliseconds on our FPGA-based platform. On a Sun UltraSPARC Model 140, the same operation implemented using C takes 690 milliseconds. Although we illustrate our design for a specific search operation, our design technique can be applied to related search operations with minor modifications. Also, it can be ported to other FPGA devices.

关键词： Hardware Field programmable gate arrays Computer vision Concurrent computing Kernel High performance computing Data mining Machine vision Real time systems Data engineering

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Analysis of the execution of a next generation application on superscalar and grid processors

Analysis of the execution of a next generation application o...

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International conference on parallel and distributed Systems (ICPADS)

作者： J. Rubio L.K. John Electrical and Computer Engineering University of Texas Austin USA

The astonishing advances in processing speeds and the phenomenal increase in chip densities have enabled the creation of very powerful microprocessors and computer systems. Future high end computing systems are expected to have teraflops of computing capability and massive amounts of storage. Such computers are expected to be important for discovery in the fundamental sciences, pharmaceuticals, and several other causes for the improvement of mankind. In this paper, we analyze a workload that is expected to be instrumental in designing and architecting future computing systems. The workload is a ground motion tracker indication (GMTI) application created by the scientists at the MIT Lincoln Laboratory. The application is being used to drive the design of several advanced future computer systems; hence it is important to understand the computational, memory access and parallelism features of this application. In this paper, we first describe the various components/stages of this application. Then, we perform detailed analysis of the execution of this application. On the basis of profiling the execution of the application, both on actual platforms and with simulations, we show that the parallelism in the several stages of the application is different. The application is seen to contain a large amount of parallelism that can be exploited by spatially or temporally parallel computer architectures. However, the nonuniformities in computing requirements as well as memory access patterns of the different stages are important considerations in the design of spatially/temporally parallel architectures to handle these applications. The execution of the application on a superscalar processor and a grid processor are analyzed.

关键词： Application software Concurrent computing parallel processing Microprocessors Pharmaceuticals Instruments Tracking Laboratories Drives Performance analysis

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Analysis of heat and fluid flow in a PCB channel using KAICUBE/Hanbit-1 parallel computer

Proceedings of the Conference on High Performance Computing ...

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proceedings of the conference on High Performance computing on the Information Superhighway, HPC Asia'97 1997年 89-92页

作者： Yun, B.T. Choi, D.H. Korea Advanced Inst of Science and Technology Taejon Korea Republic of

A three-dimensional analysis code for mixed convection flow through the printed-circuit-board (PCB) channel on which heat generating chip modules are mounted has been developed. For uniformly distributed modules, a small domain containing single module is considered with periodic and symmetry boundary conditions. Calculations have been made for various Grashof numbers to examine the effects of natural convection for both adiabatic and conducting wall conditions. The program is designed to run on the KAICUBE/Hanbit-1 parallel computer and its performance on different machines is compared in the paper.

关键词： Printed circuit boards

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Efficient personalized communication on wormhole networks

Efficient personalized communication on wormhole networks

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International conference on parallel Architecture and Compilation Techniques (PACT)

作者： F. Petrini R. Vanneschi International Computer Science Institute Berkeley CA USA Dipartimento di Informatica Pisa Italy

Bridging models, such as the BSP (bulk synchronous parallel) model, tend to abstract the characteristics of interconnection networks using a small set of parameters, by dividing the computation into supersteps and organizing the communication into global patterns called h-relations. In this paper, we evaluate (through experimental results conducted on a wormhole-routed 2D torus and a quaternary fat-tree with 256 processing nodes) the execution time of three families of h-relations with variable degree of imbalance. We also prove a strong result that links the communication performance of the fat-tree with the BSP abstraction of the interconnection network. Given a generic h-relation, we can provide a value of g (the gap) that, in the worst case, slightly overestimates the completion time and is very close to optimality.

关键词： Computer networks Delay Multiprocessor interconnection networks Random access memory Concurrent computing Costs Computer science Organizing distributed computing High performance computing

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Dycos-a customizable kernel architecture supporting distributed operating environments

Dycos-a customizable kernel architecture supporting distribu...

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IEEE International conference on Algorithms and Architectures for parallel Processing (ICAP)

作者： C.B. Czech Department of Computer Science Technische Universitat Munchen Munich Germany

Techniques of customizing and extending operating systems (OSs) have a growing impact on system architectures in the field of distributed computing and parallel programming. Even if traditional methods of adaption have been limited to the user-level, modern OSs cannot do without kernel support. Hence concepts and structures of microkernel architectures must be redefined to meet the requirements of today's and future applications. We propose a new customizable low-level OS architecture-the Dycos kernel. We discuss customization demands on microkernels and describe the basic kernel concept. Dycos is an object-based approach providing a toolbox of operations to build user-definable compositions of kernel structures. The Dycos approach has been evaluated on a Solaris 2.5.1 platform.

关键词： Kernel Computer architecture Resource management Software architecture Computer science Electronic mail Operating systems distributed computing parallel programming Solar power generation

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Calculating optimal flit size and upper limit on the performance of wormhole routing

Calculating optimal flit size and upper limit on the perform...

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IEEE International conference on Algorithms and Architectures for parallel Processing (ICAP)

作者： A. Symons V. Lakshmi Narasimhan CiTR Pty Limited University of Queensland QLD Australia Information Technology Division Head information Management Group SA Australia

The emergence of large scale distributed memory computers has brought with it a variety of interconnection networks. As it is not feasible to fully interconnect the processors with a diameter of one, routing of messages is necessary. Wormhole routing is an efficient method of routing and in this paper, we derive a model for wormhole routing. Using this model, we determine the optimal buffer size, and hence show that for medium to large messages, the communication time using wormhole routing is dependent on the square root of the network diameter.

关键词： Routing Multiprocessor interconnection networks distributed computing Concurrent computing Application software Message passing Costs Switches Delay Australia

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Toward a scalable design for command and control systems

Toward a scalable design for command and control systems

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Workshop on parallel and distributed Real-Time Systems

作者： J.A. Caruso Computer Science Corporation Dahlgren VA USA

Command and control systems exist in a world of constantly shifting demands and expectations; therefore, producing scalable, evolvable systems has always been a priority of system designers. However the need to meet performance requirements has often been a restraint on scalability goals. advances in the speed and capacity of computational and communications equipment have substantially increased the range of scalability that can be achieved while still meeting performance requirements. The High Performance distributed computing Program (HiPer-D) has demonstrated a design for the AEGIS weapons system, which is close to achieving the full range of operational requirements while providing scalability along several dimensions. This paper discusses the HiPer-D design, its context, development, and efforts to achieve system level performance.

关键词： Command and control systems Scalability Fault tolerance Hardware Communication equipment distributed computing Weapons Application software Computer architecture Resource management

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6th conference on Information and Communication Technologies, *** 2019

6th Conference on Information and Communication Technologies...

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6th conference on Information and Communication Technologies, TIC.EC 2019

ISBN: (纸本)9783030357399

The proceedings contain 19 papers. The special focus in this conference is on Information and Communication Technologies. The topics include: A Novel Approach to Detect Missing Values Patterns in Time Series Data;detection and Classification of Urban Actors Through TensorFlow with an Android Device;support Vector Regression to Downscaling Climate Big Data: An Application for Precipitation and Temperature Future Projection Assessment;Prediction of Imports of Household Appliances in Ecuador Using LSTM Networks;integrating Corporate Social Responsibility to a Process-Based Cost Analysis System;models, Guidelines and Trends for Process Quality Management: A Literature Review;modeling and Ranking External Stakeholders in Open Source Software Adoption;Landslide Monitoring System Through Wireless Sensor Network Using RTK Technique: Case of Study Basin of Loja City;a Design for a Secure Malware Laboratory;a Bayesian Network Approach to Identity Climate Teleconnections Within Homogeneous Precipitation Regions in Ecuador;design and Implementation of an Automatic System for the Monitoring and Monitoring of a Prototype Refrigeration Plant with parallel Compressors;design of Emergency Call Record Support System Applying Natural Language Processing Techniques;Integrating ISA-95 and IEC-61499 for distributed Control System Monitoring;genomic Databases Exploration Using Conceptual Models;management of Humanitarian Logistics in the Stages Prior to Natural Disasters in Canton Ambato, Ecuador;variability Features in Building Approaches for Context-Aware Mobile Applications;Wheelchair Controlled by Eye Movement Using Raspberry Pi for ALS Patients.

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