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computing performance: Game Over or Next Level?

COMPUTER 2011年第1期44卷 31-38页

作者： Fuller, Samuel H. Millett, Lynette I. Analog Devices Inc Res & Dev Norwood MA 02062 USA

The end of dramatic exponential growth in single-processor performance marks the end of the dominance of the single microproessor in computing. The era of sequential computing must give way to an era in which parallelism holds the forefront. Although important scientific and engineering challenges lie ahead, this is an opportune time for innovation in programming systems and computing architectures.

关键词： Computational modeling Hardware High-performance computing IT Roadmap Moore's law Parallel computing Parallel processing Program processors Programming Sequential analysis computer architecture computing architectures computing performance parallel processing parallelism performance evaluation sequential computing single processor performance

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New Method for computing performance of Choked Reacting Flows and Ram-to-Scram Transition

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JOURNAL OF PROPULSION AND POWER 2013年第2期29卷 433-445页

作者： Torrez, Sean M. Dalle, Derek J. Driscoll, James F. Univ Michigan Dept Aerosp Engn Ann Arbor MI 48109 USA

An improved method has been developed to compute the thrust of a dual-mode scramjet, which is an engine with a combustor that operates both subsonically and supersonically. This strategy applies to any internal flow that can be modeled one-dimensionally. To handle the mathematical singularity at the location of thermal choking, the simple Shapiro method is expanded to create a new method that includes finite-rate chemistry and high-temperature gas properties. A forward shooting method is employed to find appropriate initial conditions for integration of the governing equations, which results in a unique transonic (choked) condition capable of reaching a supersonic state at the end of the domain. Solutions of the governing equations are computed using the propulsion code MASIV, which has been integrated into a hypersonic vehicle flight dynamics code. Computations for both ram-mode and scram-mode operations are compared to experimental results. Predictions are made for flight conditions of a hypersonic vehicle built around the given flowpath. Benefits of a pseudo-one-dimensional approach are that computational time is small and physical reasons for observed engine performance are easy to determine. Limitations include the fact that behavior of oblique shocks and other two-dimensional and three-dimensional phenomena in the combustor cannot be computed directly.

关键词： Reacting Flow computing performance Combustors Separated Flows Scramjet Hypersonic Vehicles Flight Dynamics Oblique Shock Mach Numbers Stagnation Temperature

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THE FUTURE OF computing performance

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computing IN SCIENCE & ENGINEERING 2011年第4期13卷 4-5页

作者： Post, Douglass Post Douglass

A new study explains why the days of obtaining performance increases due to higher processor speed are mostly over, and where we go from here.

关键词： computing performance Moore's law microprocessing speed parallel computing scientific computing

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Influence of Temperature Control Limits On Passively Cooled computing System performance 31

Influence of Temperature Control Limits On Passively Cooled ...

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31st Annual Semiconductor Thermal Measurement, Modeling and Management Symposium (SEMI-THERM)

作者： Carbone, Mark Intel Corp 2200 Mission Coll Blvd Santa Clara CA 95054 USA

ISBN: (纸本)9781479986002

Passively-cooled electronic systems such as tablet computers and cell phones commonly are thermally limited by the allowable touch temperature of their surfaces. These systems typically cannot cool maximum processor power in steady state and simultaneously meet surface temperature restrictions. The primary surface temperature control method for thin mobile devices is to limit power, typically resulting in lower computing performance. Improved thermal designs allow higher power dissipation and therefore increased computing performance. Thermal and mechanical design engineers typically operate in terms of temperature for a given power, and this is not usually translated to computing performance. It can be difficult to justify a better thermal design if it is not quantified in its utility to the user. This paper quantifies the tradeoffs between thermal solution performance/temperature control limits and computing performance for two tablet computers and one cell phone that all use the same type of SoC processor.

关键词： Tablet phone passive cooling fanless design computing performance frame rate frames per second fps System on a Chip SoC power temperature

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A structural model of end user computing satisfaction and user performance

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INFORMATION & MANAGEMENT 1996年第2期30卷 65-73页

作者： EtezadiAmoli, J Farhoomand, AF UNIV HONG KONG HONG KONG HONG KONG

The proliferation of end user computing has necessitated the development of reliable and valid instruments that measure satisfaction in this environment and evaluate its success when used in improving user performance. An instrument for measurement of end user computing satisfaction (EUCS) is developed. Using exploratory factor analysis, six attitudinal dimensions for measurement of EUCS are first identified, Structural equation modelling techniques are then used to explore the relationship between EUCS and user performance. It is shown that the six attitudinal dimensions of EUCS account for a significant portion of the variation in user performance.

关键词： end user computing computing performance satisfaction measures of satisfaction structural equation modelling

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performance Analysis of Cloud computing Infrastructure 14th

Performance Analysis of Cloud Computing Infrastructure

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14th International Conference on Mobile Web and Intelligent Information Systems (MobiWis)

作者： Komarek, Ales Pavlik, Jakub Sobeslav, Vladimir Univ Hradec Kralove Fac Informat & Management Rokitanskeho 62 Hradec Kralove Czech Republic

ISBN: (纸本)9783319655154;9783319655147

This paper explains how to work with performance measurement tools to be able to make qualified decision during the election of the right cloud platform. The popularity of the cloud computing is increasing rapidly and there is a variety of cloud platforms from Open-source world as well as from the vendors. Choosing the right solution, either public cloud from large number of providers or private cloud, can significantly differ in cost and performance. This brings a lot of challenges to find suitable solution one for end user workload.

关键词： Cloud performance testing Virtualization Network performance Storage performance computing performance

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Survey of Analysis of performance in Cloud computing Environment

Survey of Analysis of Performance in Cloud Computing Environ...

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IEEE International Conference on Power, Control, Signals and Instrumentation Engineering (IEEE ICPCSI)

作者： Mishra, Abhishek Ali, Nashet Gupta, Avinash Babu Banarasi Engn Coll Informat Technol Lucknow Uttar Pradesh India

ISBN: (纸本)9781538608142

Most prominent characteristics of cloud computing is Resource virtualization. The placement of virtual machines (VMs) in the physical machines determines the resource utilization efficiency and service quality. For distributed cloud computing, where the data centers (DCs) span a large number of topographical areas and every DCs are connected by high speed internet, the placement of VMs of one big job or of one organization focuses on minimizing the distances and bandwidths between DCs. This minimizes communication latency and improves availability. A data center cluster should be found firstly to accommodate the requested VMs. In this paper algorithms of cloud computing are surveyed and analyzed systematically. Several algorithms of resource allocation and VM support which affects the performance in cloud.

关键词： virtual machine data centers Software as a Service computing performance

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Prospects for the Use of Quasi-Mersen Numbers in the Design of Parallel-Serial Processors

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APPLIED SCIENCES-BASEL 2025年第2期15卷 741-741页

作者： Kadyrzhan, Aruzhan Kadyrzhan, Kaisarali Bakirov, Akhat Suleimenov, Ibragim Gumarbek Daukeev Almaty Univ Power Engn & Commun Inst Commun & Space Engn Dept Telecommun Engn Alma Ata 050040 Kazakhstan Natl Engn Acad Republ Kazakhstan Alma Ata 050010 Kazakhstan

It is shown that a serial-parallel processor, comparable in bit capacity to a 16-bit binary processor, can be implemented based on an algorithm built on the residue number system, a distinctive feature of which is the use of the first four quasi-Mersenne numbers, i.e., prime numbers representable as pk=2k+1, k=1,2,3,4. Such a set of prime numbers satisfies the criterion 2p1p2p3p4+1=P, where P is also a prime number. Fulfillment of this criterion ensures the possibility of convenient use of the considered RNS for calculating partial convolutions developed for the convenience of using convolutional neural networks. It is shown that the processor of the proposed type can be based on the use of a set of adders modulo a quasi-Mersenne number, each of which operates independently. A circuit of a modulo 2k+1 adder is proposed, which can be called a trigger circuit, since its peculiarity is the existence (at certain values of the summed quantities) of two stable states. The advantage of such a circuit, compared to known analogs, is the simplicity of the design. Possibilities for further development of the proposed approach related to the use of the digital logarithm operation, which allows reducing the operations of multiplication modulo 2k+1 to addition operations, are discussed.

关键词： quasi-Mersen numbers trigger adder effective bit depth of adder computing performance parallel-serial computing residue number system (RNS)

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computing beyond Moore's Law

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COMPUTER 2015年第12期48卷 14-23页

作者： Shalf, John M. Leland, Robert Lawrence Berkeley Natl Lab Natl Energy Res Supercomp Ctr Berkeley CA 94309 USA Lawrence Berkeley Natl Lab Dept Comp Sci Berkeley CA USA Sandia Natl Labs Sci & Technol Livermore CA 94550 USA

Photolithography systems are on pace to reach atomic scale by the mid-2020s, necessitating alternatives to continue realizing faster, more predictable, and cheaper computing performance. If the end of Moore's law is real, a research agenda is needed to assess the viability of novel semiconductor technologies and navigate the ensuing challenges.

关键词： CMOS integrated circuits electronic engineering computing photolithography Moores law computing performance photolithography systems semiconductor technologies Biological system modeling CMOS integrated circuits CMOS technology Computational modeling Consumer electronics Moores Law 2D lithography 3D chip stacking 3D integration Borkar criteria CMOS Dennard scaling HPC Moores law TFET classical digital computing model digital computing electronic materials energy-efficient electronics high-performance computing neuromorphic computing spintronics superconducting logic technology scaling topological insulator

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Cluster Node computing for Target Generation Systems in Aircraft Simulations

Cluster Node Computing for Target Generation Systems in Airc...

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AIAA Science and Technology (SciTech) Forum and Exposition

作者： Monheim, Spencer Feher, Michael Murphy, James R. Andro-Avila, Bonnie NASA Ames Res Ctr Moffett Field CA 94035 USA MIRACORP Inc Moffett Field CA 94035 USA

ISBN: (数字)9781624105784

ISBN: (纸本)9781624105784

Target generation systems provide virtual position and state reports of aircraft for air traffic simulations. As the scope and scale of the simulation domains expand, there is a need to develop systems that can generate position reports for thousands of simulated aircraft simultaneously at high update rates that support out-the-window visualization. This paper discusses the motivation and reasoning behind investigating development of a next generation target generator through distributed computing using clustered node processing and the benefits such a target generation system has on future research that utilizes human-in-the-loop simulations.

关键词： Air Vehicle computing performance Distributed computing Air Traffic Management Pilot Airspace NASA Ames Research Center Urban Air Mobility Transmission Control Protocol Air Traffic Control Simulation

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