A Delay Optimization of Non-Periodic Information for the Scheduling Algorithm

2011 ◽  
Vol 216 ◽  
pp. 364-367
Author(s):  
Jun Wang ◽  
Ji Ying Ma
Keyword(s):  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Optimal Scheduling ◽  
Periodic Tasks ◽  
Delay Optimization ◽  
Communication Task

The optimal scheduling algorithm based on non-periodic information is model and analyzed. Compared with typical scheduling algorithms, it improves non-periodic tasks theoretical delay. Finally, the simulation shows that the scheduling algorithm is effective in reducing delay problems of the non-periodic communication task.

scholarly journals Comparative Study of Heterogeneous Multicore Scheduling Algorithms on Media Codecs

2021 ◽  
Vol 23 (06) ◽  
pp. 840-849
Author(s):  
Nagendra Kumar Jamadagni ◽  
◽  
Aniruddh M ◽  
Dr. Govinda Raju M ◽  
Dr. Usha Rani K. R ◽  
...  
Keyword(s):  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Optimal Scheduling ◽  
Multicore Architecture ◽  
Heterogeneous Multicore ◽  
Multicore Scheduling ◽  
Fast Pace ◽  
Streaming Services ◽  
Thread Level Parallelism ◽  
Level Parallelism

All modern-day computers and smartphones come with multi-core CPUs. The multicore architecture is generally heterogeneous in nature to maximize computational throughput. These multicore systems exploit thread-level parallelism to deliver higher performance, but they are limited by the requirement of good scheduling algorithms that maximize CPU utility and minimize wasted and idle cycles. With the rise in streaming services and multimedia capabilities of smartphones, it is necessary to have efficient heterogeneous cores which are capable of performing multimedia processing at a fast pace. It is also needed that they utilize efficient scheduling algorithms to achieve this task. This paper compares some heterogeneous multi-core scheduling algorithms available and determines which is the most optimal scheduling algorithm given various codecs.

QoS aware Multi-Path Routing using Link Scheduling Algorithm

2019 ◽  
Vol 09 ◽  
Author(s):  
Satyasrikanth Palle ◽  
Shivashankar
Keyword(s):  
Cellular Networks ◽  
Scheduling Algorithm ◽  
Research Work ◽  
Scheduling Algorithms ◽  
Turnaround Time ◽  
Link Scheduling ◽  
Spatial Reuse ◽  
Mobile Cellular ◽  
Simulation Results ◽  
End To End

Objective: The demand for Cellular based multimedia services is growing day by day, in order to fulfill such demand the present day cellular networks needs to be upgraded to support excessive capacity calls along with high data accessibility. Analysis of traffic and huge network size could become very challenging issue for the network operators for scheduling the available bandwidth between different users. In the proposed work a novel QoS Aware Multi Path scheduling algorithm for smooth CAC in wireless mobile networks. The performance of the proposed algorithm is assessed and compared with existing scheduling algorithms. The simulation results show that the proposed algorithm outperforms existing CAC algorithms in terms of throughput and delay. The CAC algorithm with scheduling increases end-to-end throughput and decreases end-to-end delay. Methods: The key idea to implement the proposed research work is to adopt spatial reuse concept of wireless sensor networks to mobile cellular networks. Spatial reusability enhances channel reuse when the node pairs are far away and distant. When Src and node b are communicating with each other, the other nodes in the discovered path should be idle without utilizing the channel. Instead the other nodes are able to communicate parallelly the end-to-end throughput can be improved with acceptable delay. Incorporating link scheduling algorithms to this key concept further enhances the end-to-end throughput with in the turnaround time. So, in this research work we have applied spatial reuse concept along with link scheduling algorithm to enhance end-to-end throughput with in turnaround time. The proposed algorithm not only ensures that a connection gets the required bandwidth at each mobile node on its way by scheduling required slots to meet the QoS requirements. By considering the bandwidth requirement of the mobile connections, the CAC module at the BS not only considers the bandwidth requirement but also conforming the constrains of system dealy and jitter are met. Result: To verify the feasibility and effectiveness of our proposed work, with respect to scheduling the simulation results clearly shows the throughput improvement with Call Admission Control. The number of dropped calls is significantly less and successful calls are more with CAC. The percentage of dropped calls is reduced by 9 % and successful calls are improved by 91%. The simulation is also conducted on time constraint and ratio of dropped calls are shown. The total time taken to forward the packets and the ration of dropped calls is less when compared to non CAC. On a whole the CAC with scheduling algorithms out performs existing scheduling algorithms. Conclusion: In this research work we have proposed a novel QoS aware scheduling algorithm that provides QoS in Wireless Cellular Networks using Call Admission Control (CAC). The simulation results show that the end-to-end throughput has been increased by 91% when CAC is used. The proposed algorithm is also compared with existing link scheduling algorithms. The results reveal that CAC with scheduling algorithm can be used in Mobile Cellular Networks in order to reduce packet drop ratio. The algorithm is also used to send the packets within acceptable delay.

Parallel Scheduling Algorithms Investigation of Support Strict Resource Reservation from Grid

2014 ◽  
Vol 519-520 ◽  
pp. 108-113 ◽  
Author(s):  
Jun Chen ◽  
Bo Li ◽  
Er Fei Wang
Keyword(s):  
Parallel Computing ◽  
Resource Utilization ◽  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Resource Reservation ◽  
Parallel Scheduling ◽  
Scheduling Model ◽  
Computing Grid ◽  
Simulation Results ◽  
Reservation Request

This paper studies resource reservation mechanisms in the strict parallel computing grid,and proposed to support the parallel strict resource reservation request scheduling model and algorithms, FCFS and EASY backfill analysis of two important parallel scheduling algorithm, given four parallel scheduling algorithms supporting resource reservation. Simulation results of four algorithms of resource utilization, job bounded slowdown factor and the success rate of Advanced Reservation (AR) jobs were studied. The results show that the EASY backfill + firstfit algorithm can ensure QoS of AR jobs while taking into account the performance of good non-AR jobs.

scholarly journals Multi-Dependency and Time Based Resource Scheduling Algorithm for Scientific Applications in Cloud Computing

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1320
Author(s):  
Vijay Prakash ◽  
Seema Bawa ◽  
Lalit Garg
Keyword(s):  
Virtual Machines ◽  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Scientific Applications ◽  
Virtual Machine Migration ◽  
Simulation Based ◽  
First Come First Serve ◽  
Minimum Completion Time ◽  
Burst Time ◽  
Parent Node

Workflow scheduling is one of the significant issues for scientific applications among virtual machine migration, database management, security, performance, fault tolerance, server consolidation, etc. In this paper, existing time-based scheduling algorithms, such as first come first serve (FCFS), min–min, max–min, and minimum completion time (MCT), along with dependency-based scheduling algorithm MaxChild have been considered. These time-based scheduling algorithms only compare the burst time of tasks. Based on the burst time, these schedulers, schedule the sub-tasks of the application on suitable virtual machines according to the scheduling criteria. During this process, not much attention was given to the proper utilization of the resources. A novel dependency and time-based scheduling algorithm is proposed that considers the parent to child (P2C) node dependencies, child to parent node dependencies, and the time of different tasks in the workflows. The proposed P2C algorithm emphasizes proper utilization of the resources and overcomes the limitations of these time-based schedulers. The scientific applications, such as CyberShake, Montage, Epigenomics, Inspiral, and SIPHT, are represented in terms of the workflow. The tasks can be represented as the nodes, and relationships between the tasks can be represented as the dependencies in the workflows. All the results have been validated by using the simulation-based environment created with the help of the WorkflowSim simulator for the cloud environment. It has been observed that the proposed approach outperforms the mentioned time and dependency-based scheduling algorithms in terms of the total execution time by efficiently utilizing the resources.

Feedback Controlled Adaptive Bandwidth Server Scheduling and its Application in NCS

2014 ◽  
Vol 631-632 ◽  
pp. 761-765
Author(s):  
Jing Cun Bi ◽  
Qi Li ◽  
Wei Jun Yang ◽  
Yan Fei Liu
Keyword(s):  
Control Systems ◽  
Scheduling Algorithm ◽  
Network Control ◽  
Periodic Tasks ◽  
Aperiodic Tasks ◽  
Network Control Systems ◽  
Feedback Scheduling ◽  
Simulation Results ◽  
Adaptive Bandwidth ◽  
Keyword Network

As for the aperiodic tasks of node in network control systems, the FC-ABS (Feedback Controlled Adaptive Bandwidth Server) scheduling algorithm is designed. The different scheduling methods are used according to time characteristics of aperiodic tasks, and feedback scheduling is used to mitigate the effect of aperiodic tasks on periodic tasks. The simulation results show that the method is effective. Keyword: Network Control Systems; Server Scheduling; Feedback Scheduling; FC-ABS.

An optimal scheduling algorithm based on task duplication

2002 ◽  
Vol 51 (4) ◽  
pp. 444-448 ◽  
Author(s):  
Chan-Ik Park ◽  
Tae-Young Choe
Keyword(s):  
Scheduling Algorithm ◽  
Optimal Scheduling ◽  
Task Duplication
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