检索结果-内蒙古大学图书馆

Green challenges to system software in data centers

Frontiers of Materials Science 2011年第3期5卷 353-368页

作者： Yuzhong SUN Yiqiang ZHAO Ying SONG Vajun YANG Haifeng FANG Hongyong ZANG Yaqiong LI Yunwei GAO Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100190 China

With the increasing demand and the wide application of high performance commodity multi-core processors, both the quantity and scale of data centers grow dramatically and they bring heavy energy consumption. Researchers and engineers have applied much effort to reducing hardware energy consumption, but software is the true consumer of power and another key in making better use of energy. system software is critical to better energy utilization, because it is not only the manager of hardware but also the bridge and platform between applications and hardware. In this paper, we summarize some trends that can affect the efficiency of data centers. Meanwhile, we investigate the causes of software inefficiency. Based on these studies, major technical challenges and corresponding possible solutions to attain green system software in programmability, scalability, efficiency and software architecture are discussed. Finally, some of our research progress on trusted energy efficient system software is briefly introduced.

关键词： green software multi-core data center,power efficient system software

来源：评论

学校读者我要写书评

暂无评论

An architecture description language based on dynamic description logics for self-healing systems

引用

International Journal of Advancements in computing technology 2012年第18期4卷 89-96页

作者： Wang, Zhuxiao Peng, Hui Guo, Jing Wu, Kehe Cui, Wenchao Wang, Xiaofeng School of Control and Computer Engineering State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China Education Technology Center Beijing International Studies University Beijing 100024 China National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing 100029 China School of Control and Computer Engineering Institute of Electric Information Security Engineering Research Center of Power Information North China Electric Power University Beijing 102206 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

As biological systems exhibit adaptation, healing and robustness in the face of changing environmental behavior, this paradigm has actuated research dealing with the concept of self-healing systems, which attempt to heal themselves in the sense of recovering from malicious attacks and rectifying of system faults. The goal of self-healing systems is to provide survivable systems that require high dependability, robustness, adaptability, and availability. Such systems maintain one or more models, whether external or internal, at run time as a basis for identifying problems and resolving them. This article describes an architectural description language, called ADML, which is being developed as a new formal language and/or conceptual model for representing evolving software architectures. The ADML embraces dynamic change as a fundamental consideration, supports a broad class of adaptive changes at the architectural level, and offers a uniform way to represent and reason about both static and dynamic aspects of self-healing systems. Because the ADML is based on the Dynamic Description Logic DDL(SHON (D)), which can represent both dynamic semantics and static semantics under a unified logical framework, architectural ontology entailment for the ADML languages can be reduced to knowledge base satisfiability in DDL(SHON (D)), and dynamic description logic algorithms and implementations can be used to provide reasoning services for ADML. In this article, we present the syntax of ADML, explain its underlying semantics using the Dynamic Description Logic DDL(SHON (D)), and exemplify our approach by applying it to the domain of load balancing a wireless remote-access system;the preliminary results certify the potential of the approach.

关键词： Formal languages

来源：评论

学校读者我要写书评

暂无评论

Parallelizing a machine translation decoder for multicore computer

Parallelizing a machine translation decoder for multicore co...

引用

2011 7th International Conference on Natural Computation, ICNC 2011

作者： Chen, Long Huo, Wei Mi, Haitao Zhang, Zhaoqing Feng, Xiaobing Li, Zhiyuan Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing China Department of Computer Science Purdue University West Lafayette IN 47907 United States

ISBN: (纸本)9781424499533

Machine translation (MT), with its broad potential use, has gained increased attention from both researchers and software vendors. To generate high quality translations, however, MT decoders can be highly computation intensive. With significant raw computing power, multi-core microprocessors have the potential to speed up MT software on desktop machines. However, retrofitting existing MT decoders is a nontrivial issue. Race conditions and atomicity issues are among those complications making parallelization difficult. In this article, we show that, to parallelize a state-of-the-art MT decoder, it is much easier to overcome such difficulties by using a process-based parallelization method, called functional task parallelism, than using conventional thread-based methods. We achieve a 7.60 times speed up on an 8-core desktop machine while making significantly less changes to the original sequential code than required by using multiple threads. © 2011 IEEE.

关键词： Machine translation

来源：评论

学校读者我要写书评

暂无评论

A scalable parallel ray tracing algorithm for satellite imagery

A scalable parallel ray tracing algorithm for satellite imag...

引用

IEEE International Conference on Computer Research and Development

作者： Li, Yu-Gang Zhao, Kun Huang, Yu-Qing Qiu, Zhen-Ge Liu, Zhi-Yong Beijing Lab. of Intelligent Information Technology School of Computer Science BIT Beijing 100081 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100081 China Institute of Computing Technology Chinese Academy Sciences Beijing China

ISBN: (纸本)9781612848372

Ray-tracing, can produce high-quality images, however, the use of ray-tracing has been limited due to its high demands on computational power and memory bandwidth, especially in the case of satellite imagery. In this paper, we propose a scalable parallel ray tracing algorithm of satellite imagery on a cluster of multi-core architecture. The algorithm combines demand-driven and data-driven models in order to reduce communication on the cost of maintaining redundant data. In order to make the most of computer's parallelism and increase computational efficiency, it combines two levels of parallelisms, the TLP parallelism brought by the many core architecture and the inter-node parallelism via MPI and OpenMP. Experiment results show that the algorithm is highly scalability. © 2011 IEEE.

关键词： Satellite imagery

来源：评论

学校读者我要写书评

暂无评论

Poster: Revisiting virtual channel memory for performance and fairness on multi-core architecture 11

Poster: Revisiting virtual channel memory for performance an...

引用

Proceedings of the international conference on Supercomputing

作者： Chen, Licheng Huang, Yongbing Bao, Yungang Mutlu, Onur Tan, Guangming Chen, Mingyu Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China Graduate School of Chinese Academy of Sciences China Carnegie Mellon University United States

ISBN: (纸本)9781450301022

In modern multi-core chip architecture, the DRAM system is shared by more and more cores and high bandwidth I/O devices. This trend would make the problem of request contention and un-fairness more serious. Previous research focused on memory sche-duling mechanisms to efficiently and fairly serve memory requests generated by multiple cores. However, the performance is mod-erately improved due to the limited bank-level parallelism in preva-lent DRAM chips. Based on the observation that virtual channel memory (VCM) provides more opportunities for exploiting MLP because it has more channel buffers than banks in conventional DRAM chip, we evaluate VCM technology as an alternative to DRAM for addressing the issues of contention, unfairness and MLP. In this work we implement VCM and leverage the state of art scheduling mechanism on a multi-core architecture. The experi-mental results show that (i) VCM with 32 channels improves ho-mogeneous workloads' IPC by 2.08X on a 16-core system compared to the system with conventional DRAM chips, causing extra area cost by 0.5%, and dynamic and background power pe-nalties by only 5.8% and 0.03% respectively. (ii) For heterogene-ous workloads, VCM significantly reduces unfairness by 82.0% as well as improves the workloads' performance by 1.86X in term of system throughput. © 2011 Authors.

关键词： Dynamic random access storage

来源：评论

学校读者我要写书评

暂无评论

Designing and analysis of a new book-lending system based on logic Petri nets

Designing and analysis of a new book-lending system based on...

引用

2011 International Conference on Electric Information and Control Engineering, ICEICE 2011

作者： Xia, Jiang Luan, Wenjing Department of Computer Laiwu Vocational and Technical College Laiwu 271100 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China College of Information Science and Engineering Shandong University of Science and Technology Qingdao 266510 China

A new book-lending system is designed and analyzed based on logic Petri nets in this paper. The batch processing function and indeterminacy of readers are included in the system. Its logic Petri net model is establish... 详细信息

ISBN: (纸本)9781424480395

关键词： Petri nets

来源：评论

学校读者我要写书评

暂无评论

Eliminating data invalidation in debugging multiple-clock chips

Eliminating data invalidation in debugging multiple-clock ch...

引用

作者： Gao, Jianliang Han, Yinhe Li, Xiaowei Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences China School of Information Science and Engineering Central South University China

ISBN: (纸本)9783981080179

A critical concern for post-silicon debug is the need to control the chip at clock cycle level. In a single clock chip, run-stop control can be implemented by gating the clock signal using a stop signal. However, data invalidation might occur when it comes to multiple-clock chips. In this paper, we analyze the possible data invalidation, including data repetition and data loss, when stopping and resuming a multiple-clock chip. Furthermore, we propose an efficient solution to eliminate data repetition and data loss. Theoretical analysis and simulation experiments are both conducted for the proposed solution. We implement the proposed Design-for-Debug (DfD) circuit with SMIC 0.18/Ltm technology and simulate the data transfer across clock domains using SPICE tool. The results show that both data repetition and data loss can be avoided with the proposed solution, even if metastability occurs. © 2011 EDAA.

关键词： Clocks

来源：评论

学校读者我要写书评

暂无评论

Estimating the direction of motion based on active RFID

Estimating the direction of motion based on active RFID

引用

5th International Conference on New Trends in Information Science and service Science, NISS 2011

作者： Yujian Yangwei Zhang, Yaing School of Electronics and Information Tongji University Shanghai China School of Economics and Management Shanghai Ocean University Shanghai China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China

ISBN: (纸本)9788988678626

RFID is one of the crucial technology of the IOT (Internet of things), and it has been applying to the fields of manufacturing, logistics management, public security, etc. Active RFID, as one important component of RFID, has striking features of low power consumption, stable signals, long-range read and strong anti-jamming ability. Active RFID is thus widely used in the areas of long-range identification of people and vehicles and Real Time Location system. In the various applications of active RFID, estimating the direction of motion is a vital technical issue. This paper puts forward a new method to estimate. In other words, using several directional antennae, it forms several reading zones, extracts events of tag-entering or tag-leaving and then realizes the estimation by the order of events. In this way, it is feasible to estimate not only the direction of motion of tags accurately, but also other complicated logic, e.g. tag return midway. © 2011 AICIT.

关键词： Radio frequency identification (RFID)

来源：评论

学校读者我要写书评

暂无评论

A processor-DMA-based memory copy hardware accelerator

A processor-DMA-based memory copy hardware accelerator

引用

IEEE International Conference on Networking, Architecture and Storage

作者： Su, Wen Wang, Ling Su, Menghao Liu, Su Key Laboratory of Computer System and Architecture Chinese Academy of Sciences China Institute of Computing Technology Chinese Academy of Sciences China Graduate University of Chinese Academy of Sciences China Loongson Technology Corporation Limited China

ISBN: (纸本)9780769545097

For many Operating systems and device drivers, memory copy is the most time-consuming operation which has always been paid special attention. In this paper, we propose a processor DMA based memory copy hardware accelerator with the goal to reduce the instructions executed on CPU, and exploit the parallelism between computing and data transfer in memory copy. This is accomplished by taking advantage of a proposed Direct Memory Access (DMA) engine in the processor which overcomes many conventional DMA engine shortcomings. Experimental results show that the proposed hardware solution achieves a speedup of 14.79 compared with the optimized software solution and an overlap of 81.8% in computing and data transfer on average. © 2011 IEEE.

关键词： Engines

来源：评论

学校读者我要写书评

暂无评论

Research on a Remote Network Monitoring Model for Large-scale Materials Manufacturing

Research on a Remote Network Monitoring Model for Large-scal...

引用

2011 International Conference on Advanced Materials and Computer Science(ICAMCS 2011)

作者： Xiaohui ZENG Manhua LI Wenlang LUO Department of Computer Science and Technology Jinggangshan University The Key Laboratory of Embedded System and Service Computing Ministry of EducationTongji University

A remote network monitoring model for large-scale materials manufacturing is proposed, including five modules: center control module, data collection and fault alarm module, graph drawing module and data storage module. The center control module not only interacts with users, but also controls the other four modules to work together in harmony. According to this monitoring model, a remote network monitoring platform is designed and realized. The user can interact with the control center module through an Internet browser, and the information about the monitored manufacturing machines and devices can be displayed by means of text, chart, graphic and sound, etc. Moreover, the details about the problems or faults from the monitored objects can be obtained in time. The experimental results indicate that the network monitoring platform can accurately get the information of the monitored objects, and users can conveniently get the online running state of those monitored objects.

关键词： remote network monitoring data storage fault alarm materials manufacturing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：