CN109947552A - Margin control dynamic task scheduling method based on process and thread scheduling - Google Patents
Margin control dynamic task scheduling method based on process and thread scheduling Download PDFInfo
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Abstract
The margin control dynamic task scheduling method based on process and thread scheduling that the invention discloses a kind of is the different priority of delineation of activities according to sensitivity of the business to time delay, higher to the service priority that time delay is more sensitive；Scheduling process combines the scheduling scheme of multi-process and multithreading；Process scheduling is used to cope with the different types of business of priority, and an element of the thread scheduling as process scheduling copes with the business of the same race of high concurrent, thread scheduling is by the way of dynamic priority.The present invention meets the real-time process demand of task, and the resource utilization of lifting system.
Description
Technical field
The present invention relates to wireless communication technology fields, are combined based on process scheduling with thread scheduling more particularly to one kind
Margin control dynamic task scheduling method.
Background technique
In recent years, the centralized cloud computing of linear increase can not match the magnanimity edge data of explosive growth.Side
Edge calculates (Edge Computing, EC) as a kind of new calculating mode, can be obtained by data near source in time
Effectively handle.This mode is different from cloud computing and all data is transferred to data center, bypassed network bandwidth with
The bottleneck of delay.Edge calculations seek to these independent dispersions that will be closed on space length either network distance with user
Resource is united, and is provided, is stored and network service for application.Margin control is exactly the carrier of edge calculations.Edge position control
Device is divided into two parts to the computation model of data: the cloud service of downlink and all things on earth interconnection services of uplink.In comparison, uplink
All things on earth interconnection services be more complicated one kind.Here complicated one side is the complexity of network environment, is on the other hand embodied
In the complexity of type of business.
The complexity of type of business is embodied in demand of the different business to QoS and is different.By taking time delay as an example, tightly
Requirement of the anxious class business to time delay is inevitable very high, and it is that urgent class business preferentially provides the processing of system that this, which just needs margin control,
Power.Aiming at the problem that processing of business real-time, the present invention wants to set up a kind of method for scheduling task of margin control, to meet
The requirement of real-time of delay-sensitive traffic.Common centralized method for scheduling task has very much, such as prerequisite variable algorithm
(FCFS), round robin (Round Robin), multilevel feedback queue algorithm etc..But the method for these task schedules does not all have
According to QoS of survice demand assignment system disposal right, and the algorithm of some task schedules needs additional generate to calculate cost, such as
Round robin just needs to determine to rotate the length of timeslice according to the task execution time of statistics, these all can bring one to system
Fixed load.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides one kind based on process and thread tune
The margin control dynamic task scheduling method of degree, in complicated internet of things service, since different business is to the sensitivity of delay
Degree is different, and conventional task schedule may delay the processing opportunity of urgent type business, it is therefore desirable to propose a kind of novel
Margin control centralization method for scheduling task.A kind of side combined based on process scheduling with thread scheduling proposed by the present invention
Edge controller dynamic task scheduling method is the different priority of delineation of activities according to sensitivity of the business to time delay, specifically
Scheduling process combine the scheduling scheme of multi-process and multithreading.It is different types of that process scheduling is mainly used to reply priority
Business, thread scheduling mainly for cope with high concurrent business of the same race.It can satisfy internet of things service substantially by the above method
Real-time process demand, it is downward to improve edge calculations framework and the resource utilization of lifting system to a certain extent
The real-time of slow responsive type business handles problem.
Technical solution: to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of margin control dynamic task scheduling method based on process and thread scheduling, according to business to the quick of time delay
Sense degree is the different priority of delineation of activities, higher to the service priority that time delay is more sensitive；Scheduling process combine mostly into
The scheduling scheme of journey and multithreading；Process scheduling is used to cope with the different types of business of priority, and thread scheduling is as process tune
One element of degree, copes with the business of the same race of high concurrent, thread scheduling specifically includes following step by the way of dynamic priority
It is rapid:
Step 1: the type of internet of things service being divided into four seed types according to the sensitive situations to time delay, respectively promptly
Alarm class business, downlink control class business, Streaming Media class business, regular monitoring class business；
Step 2, in margin control it is respectively the received process of task turn-on data of four seed types, and assigns each
The different port numbers PORT of a process, to establish the mapping relations of type of service and port；
Step 3, the process number Process ID of four class business process is obtained, and is referred to according to the process number renice of business
Enable modification priority process priority P RI；
Step 4, inside the identical process of type of business, the business to be successively received opens different threads, thread according to
It is executed according to dynamic priority height, the update method of dynamic priority is as follows:
Step 41, business initial priority is identical in process, is pori, initialize system clock；
Step 42, statistics obtains the general execution time t of the business in this processgen, enable fiducial time θ=tgen/ n,
In, n indicate it is desirable that the number that is at most preempted of a task, the CPU usage highest of system when actual measurement takes 2-3；
Step 43, process receives new task, and creates new thread for it, the waiting time of all threads in update processWherein,Indicate updated thread latency,When indicating that the thread before updating waits
Between；
Step 44, all threads are sorted according to the waiting time, waiting for a long time, priority is high, the meter of dynamic priority
Calculation mode isWherein, pdynIndicate the priority of current thread,Indicate the waiting time of thread；
Step 45, system passes through fiducial time θ, repeats step 43.
Preferred: local intelligent terminal when sending data, can select corresponding end according to the type of service for sending data
Mouthful, when margin control receives data, type of service can be determined according to the port of the business of reception, so that it is determined that business is excellent
First grade PRI, high-priority service seize the system disposal right of low priority traffice, after high-priority service is finished, quilt
The low priority traffice seized automatically continues execution.
Preferred: margin control is that the business of different priorities opens different processes, three attribute characterizations of process:
Process number Process ID, PID, port numbers PORT, priority P RI, when a process is currently running, based on depriving principle,
The disposal right for having distributed to it is deprived, it is distributed into other processes.
Preferred: depriving principle has: dynamic priority principle, static priority principle, short process priority principle, timeslice
Principle.
Preferred: the size for the frequency n that a desired task is at most preempted is between 2-3.
Preferred: the time delay of the emergency alarm class business is in 10ms-100ms.
Preferred: the delay requirement of the downlink control class business is in 10ms-1s.
Preferred: the delay requirement of the Streaming Media class business is in 1s-5s.
Preferred: the time delay of the regular monitoring class business is to require to be second grade.
Preferred: thread state includes execution state, wait state, dead state, wherein execution state is dynamic priority
Grade does not change, and wait state is dynamic priority raising, and dead state is dynamic priority clearing.
The present invention compared with prior art, has the advantages that
A kind of margin control dynamic task scheduling method based on process and thread scheduling proposed by the present invention, it is common
Centralized method for scheduling task does not all determine scheduling strategy according to QoS demand, and the algorithm of some task schedules needs volume
Outer generation calculates cost, for example round robin just needs to determine to rotate the length of timeslice according to the task execution time of statistics,
These can all bring certain load to system.The present invention utilizes the process scheduling of margin control internal system and thread scheduling phase
In conjunction with method, process scheduling be used to cope with the different types of business of priority, a member of the thread scheduling as process scheduling
Element mainly copes with the business of the same race of high concurrent.The present invention uses the side of dynamic priority in the multithread scheduling of most critical
Formula, meets the real-time process demand of task, and maximizes the resource utilization of system.
Detailed description of the invention
The margin control task schedule frame diagram that process scheduling Fig. 1 of the invention is combined with thread scheduling
Multithreading method for scheduling task work flow diagram Fig. 2 of the invention
The frame diagram of Fig. 3 margin control dynamic task scheduling method of the invention based on process and thread scheduling
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these examples are merely to illustrate this
It invents rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention various
The modification of equivalent form falls within the application range as defined in the appended claims.
A kind of margin control dynamic task scheduling method based on process and thread scheduling, as shown in figure 3, the present invention from
The real-time processing and lifting system performance for improving delay-sensitive traffic are starting point, first according to business to the sensitivity of time delay
Degree is the different priority of delineation of activities, higher to the service priority that time delay is more sensitive；Scheduling process combines multi-process
With the scheduling scheme of multithreading；Process scheduling is mainly used to cope with the different types of business of priority, and thread scheduling is as process
One element of scheduling is mainly used to cope with the business of the same race of high concurrent, and thread scheduling is by the way of dynamic priority.It utilizes
The method that the process scheduling of margin control internal system is combined with thread scheduling meets the real-time process demand of task, and
And the resource utilization of lifting system.
It is divided according to type of the sensitive situations to time delay to complicated internet of things service specific as follows (to time delay sensitivity
Successively reduce):
(1) emergency alarm class business: the common scene of such business, such as car networking scene, industry manufacture scene and disappear
Anti- scene, the delay criteria generally required is in 10ms-100ms；
(2) downlink controls class business: after margin control is to the business processing analysis of uplink, it is local to generally require collaboration
Intelligent terminal assigns control instruction, and the delay requirement of this kind of business is generally in 10ms-1s；
(3) Streaming Media class business: specifically including the large-data operations such as video traffic, voice service, this kind of business when
Prolong requirement generally in 1s-5s；
(4) regular monitoring class business: this business belongs to periodic traffic, be to time delay it is least sensitive, be typically also
Second grade；
As shown in Figure 1, being margin control task schedule frame diagram of the invention, a kind of edge based on dynamic priority
Controller method for scheduling task, the core technology of the technical solution are the dispatching methods of joint multi-process and multithreading.Process tune
Degree is used to cope with the different types of business of priority, and an element of the thread scheduling as process scheduling, mainly reply are high simultaneously
The business of the same race of hair.The present invention is in the multithread scheduling of most critical by the way of dynamic priority.
Multiprocess scheduling includes:
Margin control is that the business of different priorities opens different processes.Three attributes of process of the present invention
Characterization: process number (Process ID, PID), port numbers (PORT), priority (PRI).When a process is currently running, it is
System can be based on certain principle, deprive the disposal right for having distributed to it, it is distributed to other processes.Depriving principle has: preferential
Principle (dynamic and static state), short process priority principle, timeslice principle etc. are weighed, process scheduling of the present invention is using quiet
The mechanism of the principle of state priority, this task schedule is exactly the task scheduling strategy of preemptive type.
Specific steps are as follows:
Step 1: it is respectively the received process of task turn-on data of four seed types in margin control, and assigns
The different port numbers of each process (PORT), to establish the mapping relations of type of service and port；
Step 2: the process number (Process ID) of four class business process is obtained, and is used according to the process number of business
Renice instruction modification priority process priority (PRI)；
Local intelligent terminal when sending data, can select corresponding port according to the type of service for sending data.Edge
When controller receives data, type of service can be determined according to the port of the business of reception, so that it is determined that the priority of business
(PRI).High-priority service can seize the system disposal right of low priority traffice.After high-priority service is finished,
The low priority traffice being preempted automatically continues execution；
Multithread scheduling includes:
Multithread scheduling works inside some process, and the initial priority of all business is all identical.If into
According to first come first served basis in journey, the processing for forcibly occupying system for the operational sustainability for first reaching margin control will lead to
Power, should make each thread obtain the right to use that CPU distributes to process in turn.Realize two key technology virtual machines of thread scheduling
Technology (VM) and container technique (Docker) are very complete, the formulation of the only scheduling rule lacked.The present invention can for into
Business of the same race (initial priority is identical) in journey assigns thread new preferential inside process according to the waiting time of thread
Grade (dynamic priority).
As shown in Fig. 2, multithreading method for scheduling task work flow diagram of the invention.The Rulemaking of multithread scheduling and
Its explanation includes:
Scheduling principle: inside process (type of business is identical at this time), the business to be successively received opens different threads,
Thread is executed according to dynamic priority height；
Thread state: it executes (dynamic priority does not change), wait (dynamic priority raising), dead (dynamic priority
It resets)；
The Rulemaking step of dynamic priority are as follows:
Step 1: business initial priority is identical in process, is pori, initialize system clock；
Step 2: statistics obtains the general execution time t of the business in this processgen, enable fiducial time θ=tgen/n。
Step 3: process receives new task, and creates new thread for it.The waiting time of all threads in update process
Step 4: all threads are sorted according to the waiting time, waiting for a long time, and priority is high.The meter of dynamic priority
Calculation mode is
Step 5: system passes through fiducial time θ, repeats step 3；
Fiducial time, too small then dynamic priority change was too fast, and the process disposal right of will lead to alternates back and forth causes thrashing
Phenomenon.The resource utilization highest of system when surveying n between 2-3 according to top instruction in linux system.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of margin control dynamic task scheduling method based on process and thread scheduling, which is characterized in that including following
Step:
Step 1: the type of internet of things service being divided into four seed types, respectively emergency alarm according to the sensitive situations to time delay
Class business, downlink control class business, Streaming Media class business, regular monitoring class business；
Step 2, in margin control be respectively four seed types the received process of task turn-on data, and assign it is each into
The port numbers PORT of Cheng Butong, to establish the mapping relations of type of service and port；
Step 3, the process number Process ID of four class business process is obtained, and is instructed and is repaired with renice according to the process number of business
Change priority process priority P RI；
Step 4, inside the identical process of type of business, the business to be successively received opens different threads, and thread is according to dynamic
State priority height executes, and the update method of dynamic priority is as follows:
Step 41, business initial priority is identical in process, is pori, initialize system clock；
Step 42, statistics obtains the general execution time t of the business in this processgen, enable fiducial time θ=tgen/ n, wherein n table
Show the number that a desired task is at most preempted；
Step 43, process receives new task, and creates new thread for it, the waiting time of all threads in update processWherein,Indicate updated thread latency,When indicating that the thread before updating waits
Between；
Step 44, all threads are sorted according to the waiting time, waiting for a long time, priority is high, the calculating side of dynamic priority
Formula isWherein, pdynIndicate the priority of current thread,Indicate the waiting time of thread；
Step 45, system passes through fiducial time θ, repeats step 43.
2. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 1, feature
Be: local intelligent terminal when sending data, can select corresponding port, Edge position control according to the type of service for sending data
When device receives data, type of service can be determined according to the port of the business of reception, so that it is determined that the priority P RI of business, high
Priority service seizes the system disposal right of low priority traffice, and after high-priority service is finished, what is be preempted is low excellent
First grade business automatically continues execution.
3. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 2, feature
Be: margin control is that the business of different priorities opens different processes, three attribute characterizations of process: process number
Process ID, PID, port numbers PORT, priority P RI, based on principle is deprived, are deprived when a process is currently running
It is distributed to other processes by the disposal right for distributing to it.
4. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 3, feature
Be: depriving principle has: dynamic priority principle, static priority principle, short process priority principle, timeslice principle.
5. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 4, feature
Be: the size for the frequency n that a desired task is at most preempted is between 2-3.
6. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 5, feature
Be: the time delay of the emergency alarm class business is in 10ms-100ms.
7. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 6, feature
Be: the delay requirement of the downlink control class business is in 10ms-1s.
8. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 7, feature
Be: the delay requirement of the Streaming Media class business is in 1s-5s.
9. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 8, feature
Be: the time delay of the regular monitoring class business is to require to be second grade.
10. the margin control dynamic task scheduling method based on process and thread scheduling according to claim 9, feature
Be: thread state includes execution state, wait state, dead state, wherein and execution state is that dynamic priority does not change,
Wait state is dynamic priority raising, and dead state is dynamic priority clearing.
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| CN111200795A (en) * | 2020-01-07 | 2020-05-26 | 南京邮电大学 | Swarm-intelligent edge network control system and multitask scheduling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110891093A (en) * | 2019-12-09 | 2020-03-17 | 中国科学院计算机网络信息中心 | Method and system for selecting edge computing node in delay sensitive network |
| CN110891093B (en) * | 2019-12-09 | 2022-02-22 | 中国科学院计算机网络信息中心 | Method and system for selecting edge computing node in delay sensitive network |
| CN111131421A (en) * | 2019-12-13 | 2020-05-08 | 中国科学院计算机网络信息中心 | Method for interconnection and intercommunication of industrial internet field big data and cloud information |
| CN111131421B (en) * | 2019-12-13 | 2022-07-29 | 中国科学院计算机网络信息中心 | Method for interconnection and intercommunication of industrial internet field big data and cloud information |
| CN111200795A (en) * | 2020-01-07 | 2020-05-26 | 南京邮电大学 | Swarm-intelligent edge network control system and multitask scheduling method |
| CN111506413A (en) * | 2020-07-02 | 2020-08-07 | 上海有孚智数云创数字科技有限公司 | Intelligent task scheduling method and system based on business efficiency optimization |
| CN111506413B (en) * | 2020-07-02 | 2020-09-18 | 上海有孚智数云创数字科技有限公司 | Intelligent task scheduling method and system based on business efficiency optimization |
| WO2022141300A1 (en) * | 2020-12-30 | 2022-07-07 | 华为技术有限公司 | Task scheduling method and apparatus |
| CN114418771A (en) * | 2022-03-28 | 2022-04-29 | 深圳希施玛数据科技有限公司 | Data transmission method and related device |
| CN115840632A (en) * | 2023-02-21 | 2023-03-24 | 铜牛能源科技(山东)有限公司 | Distributed scheduling management method and system based on time sequence database |
| CN117093345A (en) * | 2023-09-05 | 2023-11-21 | 上海合芯数字科技有限公司 | Task linked list execution method and device, terminal equipment and storage medium |
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