The high power consumption of a processor is becoming a critical problem for both battery-powered devices and highperformance computers. Any reductions in the operating frequency of the processor and its supply voltag...
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ISBN:
(纸本)0889864640
The high power consumption of a processor is becoming a critical problem for both battery-powered devices and highperformance computers. Any reductions in the operating frequency of the processor and its supply voltage can lead to significant savings in energy consumption (and heat dissipation) but cause longer execution times. In this paper, the problem of performance-lossless software energy reduction for variable-voltage processors is introduced based on the analysis of voltage scaling characteristic. We discuss compile-time energy reduction techniques which identifies voltage scaling opportunities to achieve energy savings without performance loss. The problem is formulated in terms of mixed integer linear programming formulation, which can sufficiently exploit the difference of voltage scaling characteristics of subtasks. The model can be built by using program profiling results or some necessary parameters, and the heuristic algorithm is presented. Experiment results demonstrate the effectiveness of our strategy by using known benchmark programs on a dedicated processor simulator. Finally the performance of the heuristic algorithm is studied and the impact of the transition overheads is analyzed as well.
In the past fifteen years, the grow of using Bag of Words (BoW) method in the field of computer vision is visibly observed. In addition,-for the text classification and texture recognition, it can also be used in clas...
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This paper first analyzes the basic concepts of Cisco router user certification, XTACACS certification protocol and describes the data architecture of user data protocol, then defines a kind of doubly temporal databas...
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This paper first analyzes the basic concepts of Cisco router user certification, XTACACS certification protocol and describes the data architecture of user data protocol, then defines a kind of doubly temporal databases and log-in transaction processing based on network management property, at last, introduces implementation technology and method.
Current heterogeneous platforms with CPUs and accelerators have the ability to launch several indep.ndent tasks simultaneously, in order to exploit concurrency among them. These tasks typically consist of data transfe...
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Current heterogeneous platforms with CPUs and accelerators have the ability to launch several indep.ndent tasks simultaneously, in order to exploit concurrency among them. These tasks typically consist of data transfer commands and kernel computation commands. In this paper we develop a runtime approach to optimize the concurrency between data transfers and kernel computation commands in a multithreaded scenario where each CPU thread offloads tasks to the accelerator. It dep.oys a heuristic based on a temporal execution model for concurrent tasks. It is able to establish a near-optimal task execution order that significantly reduces the total execution time, including data transfers. Our approach has been evaluated employing five different benchmarks composed of dominant kernel and dominant transfer real tasks. In these experiments our heuristic achieves speedups up to 1.5x in AMD R9 and NVIDIA K20c accelerators and 1.3x in an Intel Xeon Phi (KNC) device.
Recently cloud computing used in a wide range of the applications, to ensure availability of the cloud service many design techniques of fault tolerance have been done. In this paper, proposed approach providing high ...
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The form of compact city as an "urban form of sustainable development" is paid more and more attention. This paper proposes several systems of indicators based on the understanding of the connotation of comp...
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In this study, the results of the ongoing work of the authors on the topic of the analysis of the acoustical environment from reverberant signals will be presented. Initially, some theoretical aspects on the relations...
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ISBN:
(纸本)9781450315692
In this study, the results of the ongoing work of the authors on the topic of the analysis of the acoustical environment from reverberant signals will be presented. Initially, some theoretical aspects on the relationships of the statistical quantities of the room transfer functions and the reverberant signals will be given. Then, the way that these statistical relationships can assist acoustical scene analysis methods will be discussed. The advantage of the use of twochannel (i.e. binaural) instead of single channel signals will be underlined. Finally, the implementation details of methods for the estimation of various acoustical parameters from signals will be presented. Copyright 2012 ACM.
Accurate detection of respiratory pauses is crucial in patients undergoing cataract surgery under sedation, as undetected pauses can lead to serious complications. Conventional monitoring techniques, such as pulse oxi...
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This work is focused on the controller chip design/implementation of serial-parallel-switched-capacitor coupled-inductor (SPSCCI) inverter applied to high-gain boost DC-AC conversion. The controlled plant is its power...
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The image resizing methods are roughly categoriz-ed into two classes: simple scaling method and content aware resizing. The former is trivial, while the later is able to preserve visually prominent features in the res...
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