The Task Flow Control Model Based On Strategy Of Research

With the rapid development of IT technology,information processing related industries develop gradually.Thus the computer processing it brings will become the trend of our times.We can see that the new products and services arise every day.In order to promote the development of new products and better customer experience,technology of task flow was born.According to the demand,system will separate task flows which will be decomposited into several tasks at the same time.Through scheduling algorithms and strategies basedon certain rules,the system can perform these task flows as well as these tasks and optimize the use of resources.For this reason,firstly this article summarized the understanding of task flow as well as the knowledge of strategy and model control that involved in this article.Based on the above,we analyzed the task flow based on the strategy,then pointed out the shortness of the scheduling algorithm used,finally put forward the scheduling algorithm and strategy suitable for the research direction of this paper,and designed SBAC model.The specific research results are as follows:1,SBAC is based on TBAC and PBAC.This article described three aspects in detail,comparative study of the development model,making strategy rules and design of scheduling algorithms.The strategy model is applied to the task flow,so as to realize the effective combination of task based model and control strategy based model.All of the above paved the way for the study of the model in this paper.2,Through the research of varies of priority algorithms and the contrast study of RTOS involving real-time/non real time,analysis of the static/dynamic scheduling,this article,on the basis of EDF algorithm,analized and proved that the EDF algorithm has the nature of maximum appropriate time in scheduling.An adjacent values of NVEDF algorithm to extend available time is putting forward.3,Scheduling strategy rules can be divided into static scheduling and dynamic scheduling strategy.Most of the task schedulings use static task scheduling,whose tasks are set in advance,just waiting for the system to start running.But considering the complex situation,this article put forward the dynamic dispatching strategy.Strategy rules of this article include two types,one is different task flow execution strategy within the internal system;The second is a single task flow within the different task flow execution.When the task begins,the system choose scheduling algorithm according to predefined strategy and perform tasks between or within the task flow.