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International Conference on Acoustics, Speech, and Signal processing (ICASSP)

作者： Yifan Lyu Hongzhou Wu Lixiang Liu Chuxiong Sun Institute of Software Chinese Academy of Sciences University of Chinese Academy of Sciences Beijing China Parallel and Distributed Processing Lab National University of Defense Technology Changsha China Institute of Software Chinese Academy of Sciences Beijing China

ISBN: (数字)9798350368741

ISBN: (纸本)9798350368758

Temporal Language Grounding (TLG) aims to localize moments in untrimmed videos that are most relevant to natural language queries. While existing weakly-supervised methods have achieved significant success in exploring cross-modal relationships, they still face a critical bottleneck: the interference of task-irrelevant information in query embeddings. To address this issue, we propose TLG Frequency Spiking (TFS), a dimensional mask derived from the frequency domain that models the varying importance specific to different queries. By enhancing the understanding of queries, TFS effectively optimizes the cross-modal alignment of visual and textual modalities. Experimental results show that TFS significantly outperforms state-of-the-art baselines on both the Charades-STA and ActivityNet-Captions datasets.

关键词： Visualization Grounding Frequency-domain analysis Neural networks Natural languages Interference Signal processing Speech processing Faces Videos

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RIMP: Runtime IMplicit Predication

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6th International Workshop on Advanced parallel processing Technologies

作者： Tang, Y Deng, K Wang, XD Dou, Y Zhou, XM National Lab. for Parallel and Distributed Processing China

ISBN: (纸本)3540296395

If-conversion and predicated execution are widely adopted to eliminate branch misprediction penalty. Previous predication execution depends on compiler to generate explicit predicated instructions, In this paper, a trace-based predicate mechanism named RIMP (Runtime IMplicit Predication) is discussed. The candidates of if-conversion will be identified during dynamic execution. Conventional trace cache has been modified to store RIMP traces, which include instructions both from fall-through and target block following the conditional branch. Hardware extension will add predication to RIMP trace automatically. With the help of RIMP, legacy applications can benefit from predication mechanism without recompiling source code. Simulation of RIMP implementation under diverse microarchitecture configurations is presented in the paper. Results have shown promising performance improvement. In general, RIMP with 64kB trace storage delivers an average 10.3% IPC improvement while actually speeding up the execution time by over 7%.

关键词： predication trace cache runtime execution RIMP

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SCautz:a high performance and fault-tolerant datacenter network for modular datacenters

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Science China(Information Sciences) 2012年第7期55卷 1493-1508页

作者： HUANG Feng,LU XiCheng,LI DongSheng & ZHANG YiMing National lab for parallel and distributed processing,School of Computer,National University of Defense Technology,Changsha 410073,China 1. National Lab for Parallel and Distributed Processing School of Computer National University of Defense Technology Changsha 410073 China

Modular datacenters (MDCs) use shipping containers,encapsulating thousands of servers,as large pluggable building blocks for mega *** MDC’s "service-free" model poses stricter demand on fault-tolerance of the modular datacenter network (MDCN).Based on the "scale-out" principle,in this paper we propose SCautz,a novel hybrid intra-container network for *** comprises a base Kautz topology,created by interconnecting servers,and a small number of COTS (commercial off-the-shelf) ***,each switch connects a specific number of servers forming "clusters",which,as logical nodes,form multiple higher-level logical Kautz ***’s hybrid structure has several ***,it supports multiple running modes for the MDC,while its full structure increases network capacity ***,it retains the throughput for processing one-to-x traffic in the presence of ***,it achieves much more graceful network performance degradation than computation and storage capacity *** from theoretical analysis and simulations show that SCautz is more viable for intra-container networks.

关键词： modular datacenter network container Kautz fault-tolerant

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A virtual machine server aggregation algorithm based on hierarchical clustering

A virtual machine server aggregation algorithm based on hier...

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15th International Conference on parallel and distributed Systems, ICPADS '09

作者： Huang, Feng Li, Dongsheng National Lab for Parallel and Distributed Processing College of Computer Changsha China

ISBN: (纸本)9780769539003

Combining virtual machine technology and network computing technology will be able to effectively aggregate the widely distributed heterogeneous and autonomous resources in the Internet. This paper proposes a virtual machine server aggregation algorithm, called DVSA, based on hierarchical clustering method for virtual computing environment. According to network latencies, the algorithm clusters virtual machine servers into groups. If servers in the same group are scheduled, the latencies between virtual machines which host on these servers will be small, and the performance and stability of the distributed execution environment could be improved. © 2009 IEEE.

关键词： Virtual machine

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Reduction transformations for optimization parameter selection

Reduction transformations for optimization parameter selecti...

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8th International Conference on High-Performance Computing in Asia-Pacific Region, HPC Asia 2005

作者： Yonggang, Che Zhenghua, Wang Xiaomei, Li National Lab. for Parallel and Distributed Processing Changsha 410073 China

ISBN: (纸本)0769524869

Program performance optimization often involves choosing right parameters to minimize the program's runtime. Selecting optimization parameters by means of execution-driven search is guaranteed to find excellent results, for it accurately accounts for all performance components of the target platform. But the major drawback of execution-driven approach is the excessive compilation time due to thousands of runs of the original program. In this article, we propose a novel technique called program reduction transformations to reduce the cost of execution-driven optimization parameter selection. It is based on our observation to the characteristics of the scientific applications and the optimization parameter selection task. The ideal is to transform the program before it is used in execution-driven parameter selection procedure. The transformed program runs in much shorter time but preserves the parameter selection quality. This technique greatly reduces the time spent on evaluating each candidate parameter and makes execution-driven optimization parameter selection affordable. We formulate the theoretic foundation of program reduction transformation. And we find several situations where reduction transformations can be legally applied. These situations are common in scientific applications. Experiments done for two math kernels and three SPEC benchmarks show that our approach is both feasible and effective. © 2005 IEEE.

关键词： Parameter estimation

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Improving cluster computing performance based on job futurity prediction

Improving cluster computing performance based on job futurit...

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2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010

作者： Salami, Hossein Saadatfar, Hamid Fard, Farhad Rahmani Shekofteh, S. Kazem Deldari, Hossein Parallel and Distributed Processing Lab. Engineering Department Ferdowsi University of Mashhad Mashhad Iran

ISBN: (纸本)9781424465408

By recognizing the necessity for preventative and proactive management for today's large scale and fault prone distributed systems, a tendency for these mechanisms has been appeared in recent researchers' efforts. From the birth point of this opinion, event prediction has been known as an effective approach to manage errors preventively. In this work, we attempt to make system performance better by using a job futurity predictor as an advisor for system scheduler. We have a clear sighted vision of failure sources and therefore use a comprehensive data set of system, user and job domains. Using predictor results leads to a significant improvement in performance metrics. © 2010 IEEE.

关键词： Forecasting

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JSM: Job submission manager for large-scale distributed systems based on game theory

JSM: Job submission manager for large-scale distributed syst...

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2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010

作者： Saadatfar, Hamid Salami, Hossein Deldari, Hossein Mashhadi, Habib Rajabi Fard, Farhad Rahmani Parallel and Distributed Processing Lab. Engineering Department Ferdowsi University of Mashhad Mashhad Iran

ISBN: (纸本)9781424465408

Nowadays by improving the richness of prediction methods and accessing to the more information about systems behavior, the role of proactive strategies in developing more reliable and efficient systems becomes more crucial. However, the goals of prediction and the way that the results can be employed to upgrade the system are still topics which draw recent researchers' attention. In this work, we attempt to decrease Jobs wait time and failure rate by using the results of a job futurity predictor. For achieving this goal, a system component called JSM is proposed. JSM consults the predictor and employs a game theory based model in order to probably rejecting the jobs which are likely to fail. Furthermore, for avoiding from rejecting safety jobs mistakenly, JSM intelligently adopts its decisions with the systems situations. Experimental results state a significant reduction in jobs wait time and failure rate in comparison with other related work. © 2010 IEEE.

关键词： Forecasting

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Java: From "hard coding" to using an integrated development environment

Java: From "hard coding" to using an integrated development ...

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DFMA 2006 - 2nd International Conference on distributed Frameworks for Multimedia Applications

作者： Mustafa Kattan, Ali R. Abdullah, Rosni Salam, Rosalina Abdul Parallel and Distributed Processing Lab School of Computer Sciences Universiti Sains Malaysia 11800 Penang Malaysia

ISBN: (纸本)1424404096

Being a Java developer the decision of starting to use an integrated development environment (IDE) instead of a set of discrete programming tools, is to be taken sooner or later. This paper identifies the favorite features to opt for, in selecting a suitable IDE, what should be used and by whom with plethora of such IDEs. Though IDEs are meant to facilitate program development and increase productivity, migrating developers might fall into a set of common pitfalls that could hinder productivity. Such pitfalls are indicated and discussed in the view of available IDE features. © 2006 IEEE.

关键词： Productivity

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Implementing Sparse Matrix-Vector multiplication using CUDA based on a hybrid sparse matrix format

Implementing Sparse Matrix-Vector multiplication using CUDA ...

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2010 International Conference on Computer Application and System Modeling, ICCASM 2010

作者： Cao, Wei Lu, Yao Li, Zongzhe Wang, Yongxian Wang, Zhenghua National Key Lab. for Parallel and Distributed Processing National University of Defense Technology Changsha China

ISBN: (纸本)9781424472369

The Sparse Matrix-Vector product (SpMV) is a key operation in engineering and scientific computing. Methods for efficiently implementing it in parallel are critical to the performance of many applications. Modern Graphics processing Units (GPUs) coupled with the advent of general purpose programming environments like NVIDIA's CUDA, have gained interest as a viable architecture for data-parallel general purpose computations. Currently, SpMV implementations using CUDA based on common sparse matrix format have already appeared. Among them, the performance of implementation based on ELLPACK-R format is the best. However, in this implementation, when the maximum number of nonzeros per row does substantially differ from the average, thread is suffering from load imbalance. This paper proposes a new matrix storage format called ELLPACK-RP, which combines ELLPACK-R format with JAD format, and implements the SpMV using CUDA based on it. The result proves that it can decrease the load imbalance and improve the SpMV performance efficiently. © 2010 IEEE.

关键词： Graphics processing unit

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An improved independent set ordering algorithm for solving large-scale sparse linear systems

An improved independent set ordering algorithm for solving l...

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International Conference on Intelligent Human-Machine Systems and Cybernetics

作者： Yao, Lu Cao, Wei Li, Zongzhe Wang, Yongxian Wang, Zhenghua National Key Lab. for Parallel and Distributed Processing National Univ. of Defense Technology Changsha China

ISBN: (纸本)9780769541518

The independent set ordering algorithm is a heuristic algorithm based on finding maximal independent sets of vertices in the matrix adjacency graph, which is commonly used for parallel matrix factorization. However, Disadvantages appear when it is applied to large-scale sparse linear systems. In this paper, we propose an improved algorithm by finding an optimal size of independent set in each elimination step rather than find a maximal independent set, which is proved to be effective by both theoretical analysis and parallel implementation. © 2010 IEEE.

关键词： Lower-upper decomposition

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