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As an emerging business computing model, cloud computing needs to deal with the scientific workflow submitted by user groups. How to efficiently schedule massive tasks of scientific workflow is an important problem in cloud computing. In order to minimize the total execution time of workflow, reduce the consume of cloud resources, reduce execution costs of users, a new task scheduling algorithm based...
Non-Uniform Cache Architecture (NUCA) has almost been the trend of cache architecture. Data promotion technology is used to reduce the CPU's access latency in Dynamic NUCA (D-NUCA). However, due to the limitation of the replacement strategy, more useful data in the target bank may be pushed further from the request CPU in the promotion process, which restricts the performance of technology. Moreover,...
A modal method for computing sensitivities of the eigenvectors of a non-conservative system with repeated eigenvalues by using matrix analysis in the presence of a first-order system is proposed. The characteristic matrixes of system are not limited by the restrictions of symmetric and positive definiteness. And it successfully avoids the effects of multiple eigenvalues. The simplicity and economy...
With the development of multi-core technology, the number of processing core is growing dramatically. In order to make full use of these processing cores of such large number, this paper proposed a task scheduling algorithm on the basis of task duplication, which is composed of three steps of operations so that threads are allocated to processing cores more suitably. This algorithm not only increases...
Dynamic load balancing is an important factor affecting the parallel computing performance in a multiprocessor system. On the basis of an introduction to the basic principle of dynamic load balancing algorithm, this paper first finds through analysis that the basic reason for overhead occurring in load balancing is the load migration, and then qualitatively gives the granularity formula of moving...
This paper studies the fairness model in the sharing cache between the cores in a chip Multi-processor (CMP) architecture, and makes two contributions as follows: firstly, this paper discussed the performance of the multi-core system based on the priority and the missing ratio, in contrast with the relative researches focus on the process priority, thread missing ratio or the relation between the...
As the computer industry moves toward large-scale multi-core processors (also called Chip Multi-Processor, CMP) ,the quantity of cores on a chip increases dramatically. In order to fully utilize these processing cores, load balancing has become one of the most important factors that affect the performance of multi-cores. Based on further research on dynamic load balancing scheduling model of multiprocessor...
The research for Dynamic Spectrum Access (DSA) and cognitive radio network (CRN) becomes one of the focuses in wireless network currently. However, as many other new techniques, in the initialization period, the security factors in CRN are out of focus. This paper describes the special characteristics of cognitive radio (CR) and CRN, and analysis the current and potential security threats that due...
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