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检索条件"主题词=scheduling algorithm"

共 10726 条记录，以下是231-240 订阅

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Research on task allocation strategy and scheduling algorithm of multi-core load balance

Research on task allocation strategy and scheduling algorith...

引用

7th International Conference on Complex, Intelligent, and Software Intensive Systems (CISIS)

作者： Wu, Chao Wang, Yifu Zhao, Aoyang Qiu, Tie Dalian Univ Technol Sch Software Dalian 116620 Peoples R China

ISBN: (纸本)9780769549927

Based on the research of multi-core load balancing's task scheduling and allocation, we proposed the static task graphs stratification algorithm, the static task group scheduling algorithm, and the minimum dynamic link algorithm, aiming at the characteristics of multi-core processors. When these algorithms allocate tasks, they are expected to complete multi-core load balancing. Firstly, the task allocation is divided into two stages: It needs to break dependencies among tasks and relatively independent tasks will be in the same group at the first stage. It conducts static allocation for the principle of load balancing and it allocates initial tasks which have almost the same time for the system hardware threads in the second stage. It allocates tasks which come from system's running for each hard ware thread with processor's speed as a standard in the third stage. From the verification of simulation experiment, the algorithms can achieve better load balancing and minimum completion time.

关键词： multi-core scheduling algorithm load balance task allocation

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A cross-layer fair resource scheduling algorithm for OFDMA system

A cross-layer fair resource scheduling algorithm for OFDMA s...

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IEEE Region 10 Conference (TENCON 2006)

作者： Liang Zheng Gao Youjun Tian Hui Zhang Ping Beijing Univ Posts & Telecommun WTI Lab PO Box 92No 10 XiTuCheng Rd Beijing 100876 Peoples R China

ISBN: (纸本)9781424405480

In this paper we present a cross-layer fair algorithm for efficient packet scheduling in wireless OFDMA system. At the Medium Access Control (MAC) layer, we perform a prediction of the future state of the wireless channel for each user by utilizing the information from the physical layer. According to this prediction we determine which users should be served and which resources should be allocated by the packet scheduler during the next frame. In our proposed scheduling algorithm, for each step the user with the least normalized transmit rate is allowed to choose a subcarrier, and the subcarrier with the highest utilization efficiency and the best channel condition to that user is selected. The efficiency of the proposed scheme in terms of average packet delay, packet drop rate is verified via simulation.

关键词： scheduling algorithm Signal to noise ratio Bit error rate Fading Quality of service OFDM Throughput Physical layer Resource management Media Access Protocol

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An efficient fault-tolerant scheduling algorithm for real-time tasks with precedence constraints in heterogeneous systems

An efficient fault-tolerant scheduling algorithm for real-ti...

引用

31st International Conference on Parallel Processing (ICPP 2002)

作者： Qin, X Jiang, H Swanson, DR Univ Nebraska Dept Comp Sci & Engn Lincoln NE 68588 USA

ISBN: (纸本)0769516777

In this paper, we investigate an efficient off-line scheduling algorithm in which real-time tasks with precedence constraints are executed in a heterogeneous environment. It provides more features and capabilities than existing algorithms that schedule only independent tasks in real-time homogeneous systems. In addition, the proposed algorithm takes the heterogeneities of computation, communication and reliability into account, thereby improving the reliability. To provide fault-tolerant capability, the algorithm employs a primary-backup copy scheme that enables the system to tolerate permanent failures in any single processor. In this scheme, a backup copy is allowed to overlap with other backup copies on the same processor, as long as their corresponding primary copies are allocated to different processors. Tasks are judiciously allocated to processors so as to reduce the schedule length as well as the reliability cost, defined to be the product of processor failure rate and task execution time. In addition, the time for detecting and handling of a permanent fault is incorporated into the scheduling scheme, thus making the algorithm more practical. To quantify the combined performance of fault-tolerance and schedulability, the performability measure is introduced. Compared with the existing scheduling algorithms in the literature, our scheduling algorithm achieves an average of 16.4% improvement in reliability and an average of 49.3% improvement in performability.

关键词： Computer science Costs Distributed computing Fault detection Fault tolerance Fault tolerant systems Performance evaluation Processor scheduling Real time systems scheduling algorithm

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Real-time traffic scheduling algorithm for MIMO-OFDMA systems

Real-time traffic scheduling algorithm for MIMO-OFDMA system...

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IEEE International Conference on Communications (ICC 2008)

作者： Lei, Haipeng Zhang, Xin Wang, Yafeng Beijing Univ Posts & Telecommun Sch Telecommun Engn Beijing 100088 Peoples R China

ISBN: (纸本)9781424420742

A real-time traffic scheduling algorithm is proposed for the downlink of multi-cell and multi-user MIMO-OFDMA systems. This proposed scheduling algorithm takes the spatial and frequency characters of users into account, and transmission antenna selection and modified water-filling power allocation algorithms are adopted in the allocation of space-frequency subchannels. Simulation results show that this algorithm can not only obtain better system throughput, but also lower outage rate of real-time traffic and guarantee the fairness among users.

关键词： BLAST real-time scheduling algorithm OFDMA

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A scheduling algorithm for high performance peer-to-peer platform

引用

12th Euro-Par 2006 Workshops

作者： Abdennadher, Nabil Boesch, Regis Univ Appl Sci 4 Rue Prairie CH-1202 Geneva Switzerland

ISBN: (纸本)9783540722267

This paper describes a scheduling algorithm used to execute parallel and distributed applications on a Global Computing (GC) environment, called XtremWeb-CH (XWCH). XWCH is an improved version of a GC tool called XtremWeb (XW). XWCH is an enrichment of XW allowing it to match P2P concepts: distributed scheduling, distributed communication and development of symmetrical models. The scheduling algorithm takes into account the heterogeneity and volatility of nodes. This paper illustrates the performance of XWCH in a real CPU time consuming application.

关键词： peer-to-peer high performance computing scheduling algorithm

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Organization Based Intelligent Process scheduling algorithm (OIPSA) 21

Organization Based Intelligent Process Scheduling Algorithm ...

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21st International Conference on Automation and Computing (ICAC)

作者： Shah, Munam Ali Shahid, Muhammad Bilal Zhang, Sijing Mustafa, Safi Hussain, Mushahid COMSATS Inst Informat Technol Dept Comp Sci Islamabad Pakistan Univ Bedfordshire Dept Comp Sci & Technol Luton Beds England

ISBN: (纸本)9780992680107

In a multi-tasking environment, the purpose of a scheduling algorithm is to give CPU time to each process in such a way that maximum throughput could be achieved. One way is to manually set the priority of the processes but conventional operating systems put equivalent scheduling policies on each set of process and do not observe organizational preferences. It is believed that every organization performs same set of tasks most of the time. Tasks performed by an organization must be given priority according to their level of activeness rather than some hard rules defined at a design level. In this paper, we propose a novel algorithm that schedule processes according to the organization's need. Our proposed Organization Based Intelligent Process scheduling algorithm (OIPSA) intelligently learns the processes that are frequently used within an organization's operating system and give priority to the users' most wanted processes. The results show that OIPSA decreases response time, waiting time and turnaround time for the organization preferred processes and enhance the overall efficiency of the system when compared with conventional scheduling algorithms.

关键词： OS process scheduling Organization preference scheduling algorithm

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An Efficient Fault-tolerant scheduling algorithm for Periodic Real-time Tasks in Heterogeneous Platforms 16

An Efficient Fault-tolerant Scheduling Algorithm for Periodi...

引用

16th IEEE International Symposium on Object/Component/Service-Oriented Real-Time Distributed Computing (ISORC)

作者： Qiu, Weiwei Zheng, Zibin Wang, Xinyu Yang, Xiaohu Zhejiang Univ Coll Comp Sci & Technol Hangzhou 310027 Zhejiang Peoples R China Chinese Univ Hong Kong Shenzhen Res Inst Shenzhen Peoples R China

ISBN: (纸本)9781479921133

Fault-tolerant real-time scheduling algorithm is one of the most important means to ensure the timeliness and high availability characteristics of fault-tolerant real-time systems. Existing scheduling models for periodic real-time task in heterogeneous platforms typically require the number of processors in the systems to be determined in advance;hence prohibit the scalability and the performance of distributed systems. The algorithms based on these models also require a large number of schedubility tests which lead to long execution time. To address these problems, we propose a primary and backup replica partition based fault-tolerant scheduling algorithm (PBPFT) based on a scalable scheduling model using heterogeneity that does not have to determine the scale of the distributed system in advance. The PBPFT approach also takes advantage of backup copy overlapping and phasing delay techniques to minimize system redundancy, and adopts the processor grouping technique to simplify algorithm complexity. Comprehensive experiments are conducted, and the results validate high resource utilization and commendable performance of our proposed approach.

关键词： scheduling algorithm Fault-tolerant Real-time task Primary and backup copy Heterogeneous distributed system

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A scheduling algorithm Based on Resource Overcommitment in Virtualization Environments 1

A Scheduling Algorithm Based on Resource Overcommitment in V...

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1st IEEE International Conference on Computer Communication and the Internet (ICCCI)

作者： Wang, Jibin Zhang, Hu Xu, Zhaogang He, Wenxiang Guo, Ying Natl Supercomp Ctr Jinan Shandong Comp Sci Ctr Shandong Prov Key Lab Comp Networks Jinan Peoples R China

ISBN: (纸本)9781467385152

In large cloud data center where the virtualization technologies are widely used, a challenging issue is how to efficiently allocate and migrate virtual resources. In this paper, we propose a novel scheduling algorithm based on resource overcommitment, as called i-porter. The main goal of i-porter algorithm is to improve the utilizations of heterogeneous physical resources in virtualization environments. Compared to the existing solutions, i-porter has the following advantages: 1) it is a two levels of architecture that can meet the scheduling requirements, whether for virtual machine building or migration;2) it makes the layouts of the virtual machines to be consistent and improves the cost-efficacy of the whole data center. Based on a prototype implementation of i-porter, our evaluation results show that i-porter algorithm performs excellent in resource scheduling and cost savings.

关键词： resource overcommitment i-porter scheduling algorithm virtualization

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Research on Electrical Energy scheduling algorithm based on Cloud Computing 3

Research on Electrical Energy Scheduling Algorithm based on ...

引用

3rd International Conference on Electrical Engineering and Control Science, IC2ECS 2023

作者： Dong, Yujia Zhang, Zhitao Northwest Branch China Airport Planning & Design Institute CO. Ltd Xi'an China

ISBN: (纸本)9798350382426

At present, cloud computing assists the users to dispose complex calculation process and is becoming an essential module for executing downstream tasks. With the continuous expansion of cloud computation platforms, the electrical system can utilize the cloud platform to solve complex scheduling optimization process, which can improve the effectiveness and utilization of electrical energy. However, existing electrical system scheduling relies on the specific algorithm and ignore the extraordinary computation resources from cloud serves. In this work, we deploy the most advanced scheduling algorithm in cloud computation to provide detail scheduling strategies for dynamic electrical system and measure the scheduling response time costs and energy optimization ratio for evaluating the proposed method. Finally, we compare our model with existing scheduling methods in identical environment and scales of electrical system. From our simulation results, we can observe that our model outperforms existing non-cloud based methods and provides more optimization strategies with low calculation costs. © 2023 IEEE.

关键词： Cloud Computing Electrical System Energy Optimization scheduling algorithm

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scheduling algorithm for Multi-Massive-Online Applications in Multicast Mobile Networks

Scheduling Algorithm for Multi-Massive-Online Applications i...

引用

Consumer Communications and Networking Conference, CCNC IEEE

作者： A. Minamikawa S. Muramatsu H. Yokoyama KDD Research and Development Laboratories Inc. Fujimino Saitama Japan

ISBN: (纸本)9781424451753;9781424451760

This paper describes a new multicast scheduling scheme for multi-massive-online (MMO) applications in mobile networks. In order to reduce the amount of traffic volume, multicast channels should be fully utilized for information sharing among users while unicast channels are used to notify the current states of the users to the servers. On the other hand, most mobile terminals cannot use both multicast and unicast channels at the same time slot. In such case, each terminal should choose either to receive data in multicast channels delivered from the servers, or to send its state information to the servers while missing the multicasted data In order to provide the optimum tradeoff between sending and receiving the relevant data of MMO, we propose a new scheduling algorithm with which multicast servers enable most mobile terminals to have upload time while they obtain the multicast contents that they prefer. The effectiveness of the proposed algorithm is numerically evaluated.

关键词： scheduling algorithm Unicast Network servers Multicast algorithms Telecommunication traffic Downlink Broadcasting Signal processing algorithms Mobile handsets Broadband communication

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