This document discusses periodic task scheduling algorithms including time line, rate monotonic, and earliest deadline first scheduling. It provides notation for periodic tasks and assumptions made. It describes the algorithms, including that rate monotonic scheduling is optimal for fixed priority scheduling and earliest deadline first can utilize 100% of processor bandwidth. Dynamic priority scheduling with earliest deadline first can better handle overloads but may involve more context switches.
The ppt contains detail about issues and scheduling technique of real-time systems. It includes scheduling both online and offline for uniprocessor system. The applications of real-time system is also there
The ppt contains detail about issues and scheduling technique of real-time systems. It includes scheduling both online and offline for uniprocessor system. The applications of real-time system is also there
Scheduling Task-parallel Applications in Dynamically Asymmetric EnvironmentsLEGATO project
Presentation by Jing Chen and Pirah Noor Soomro (Chalmers University of Technology) at the 16th International Workshop on Scheduling and Resource Management for Parallel and Distributed Systems (SRMPDS 2020) on 17 August 2020.
SRMPDS was a virtual event and collocated with ICPP’20 - 2020 International Conference on Parallel Processing.
Comparision of different Round Robin Scheduling Algorithm using Dynamic Time ...Editor IJMTER
Performance of computer system is heavily depends on the scheduling of the
processes. The concept of scheduling helps in selection of the process for execution. There
are many scheduling techniques available like First-Come-First-Serve (FCFS), Shortest Job
First (SJF), Priority, Round Robin (RR) etc. Output of these scheduling technique is depends
on mainly three parameter, one is average waiting time, average turnaround time and number
of context switch. It also depends on the context switching of the processes. In this paper, we
focus on the RR scheduling techniques. There are two types of RR scheduling technique, one
is RR with static quantum and other is RR with dynamic quantum. In this paper we compare
the result of different RR algorithm techniques those having dynamic quantum and we show
that even-odd RR scheduling is the best scheduling technique compare to simple RR, average-max RR and average mid-max RR.
Temporal workload analysis and its application to power aware schedulingijesajournal
Power
-
aware scheduling reduces CPU energy consumption in hard real
-
time systems through dynamic
voltage scaling(DVS). The basic idea of power
-
aware scheduling
is to find slacks available to tasks and
reduce CPU‟s frequency or lower its voltage using the found slacks. In this paper, we introduce temporal
workload of a system which specifies how much busy its CPU is to complete the tasks at current time.
Analyzin
g temporal workload provides a sufficient condition of schedulability of preemptive early
-
deadline
first scheduling and an effective method to identify and distribute slacks generated by early completed
tasks. The simulation results show that proposed algo
rithm reduces the energy consumption by 10
-
70%
over the existing algorithm and its algorithm complexity is O(n). So, practical on
-
line scheduler could be
devised using the proposed algorithm.
Temporal workload analysis and its application to power aware schedulingijesajournal
Power-aware scheduling reduces CPU energy consumption in hard real-time systems through dynamic voltage scaling(DVS). The basic idea of power-aware scheduling is to find slacks available to tasks and reduce CPU‟s frequency or lower its voltage using the found slacks. In this paper, we introduce temporal workload of a system which specifies how much busy its CPU is to complete the tasks at current time. Analyzing temporal workload provides a sufficient condition of schedulability of preemptive early-deadline first scheduling and an effective method to identify and distribute slacks generated by early completed tasks. The simulation results show that proposed algorithm reduces the energy consumption by 10-70% over the existing algorithm and its algorithm complexity is O(n). So, practical on-line scheduler could be devised using the proposed algorithm.
Scheduling Task-parallel Applications in Dynamically Asymmetric EnvironmentsLEGATO project
Presentation by Jing Chen and Pirah Noor Soomro (Chalmers University of Technology) at the 16th International Workshop on Scheduling and Resource Management for Parallel and Distributed Systems (SRMPDS 2020) on 17 August 2020.
SRMPDS was a virtual event and collocated with ICPP’20 - 2020 International Conference on Parallel Processing.
Comparision of different Round Robin Scheduling Algorithm using Dynamic Time ...Editor IJMTER
Performance of computer system is heavily depends on the scheduling of the
processes. The concept of scheduling helps in selection of the process for execution. There
are many scheduling techniques available like First-Come-First-Serve (FCFS), Shortest Job
First (SJF), Priority, Round Robin (RR) etc. Output of these scheduling technique is depends
on mainly three parameter, one is average waiting time, average turnaround time and number
of context switch. It also depends on the context switching of the processes. In this paper, we
focus on the RR scheduling techniques. There are two types of RR scheduling technique, one
is RR with static quantum and other is RR with dynamic quantum. In this paper we compare
the result of different RR algorithm techniques those having dynamic quantum and we show
that even-odd RR scheduling is the best scheduling technique compare to simple RR, average-max RR and average mid-max RR.
Temporal workload analysis and its application to power aware schedulingijesajournal
Power
-
aware scheduling reduces CPU energy consumption in hard real
-
time systems through dynamic
voltage scaling(DVS). The basic idea of power
-
aware scheduling
is to find slacks available to tasks and
reduce CPU‟s frequency or lower its voltage using the found slacks. In this paper, we introduce temporal
workload of a system which specifies how much busy its CPU is to complete the tasks at current time.
Analyzin
g temporal workload provides a sufficient condition of schedulability of preemptive early
-
deadline
first scheduling and an effective method to identify and distribute slacks generated by early completed
tasks. The simulation results show that proposed algo
rithm reduces the energy consumption by 10
-
70%
over the existing algorithm and its algorithm complexity is O(n). So, practical on
-
line scheduler could be
devised using the proposed algorithm.
Temporal workload analysis and its application to power aware schedulingijesajournal
Power-aware scheduling reduces CPU energy consumption in hard real-time systems through dynamic voltage scaling(DVS). The basic idea of power-aware scheduling is to find slacks available to tasks and reduce CPU‟s frequency or lower its voltage using the found slacks. In this paper, we introduce temporal workload of a system which specifies how much busy its CPU is to complete the tasks at current time. Analyzing temporal workload provides a sufficient condition of schedulability of preemptive early-deadline first scheduling and an effective method to identify and distribute slacks generated by early completed tasks. The simulation results show that proposed algorithm reduces the energy consumption by 10-70% over the existing algorithm and its algorithm complexity is O(n). So, practical on-line scheduler could be devised using the proposed algorithm.
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Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
1. Chapter 4 – Periodic Task Scheduling
In many real-time systems periodic tasks dominate the demand.
Three classic periodic task scheduling algorithms:
– Time Line (Cyclic)
– Rate Monotonic
– Earliest Deadline First
What is the landscape here?
What causes the challenges?
2. Periodic Task Scheduling Notation
Ti denotes the period of task i
Ci denotes the Computation time for one instance of task i
5. Processor Utilization Factor - U
< 1 if set is scheduable
Let be the upper bound of the processor utilization factor for a set under a
given algorithm A. When the set is said to fully utilize the processor.
1
6. Time Line Scheduling (Cyclic Scheduling)
Time Line Scheduling (Off-line scheduling strategy)– Divide the time line into time
slices for scheduling tasks, e.g. use the Greatest Common Divisor of the Task Periods
as the time slice:
40 Hz
20 Hz
10 Hz
Schedulability is guaranteed if:
Time line scheduling is sensitive to changes in the task parameters.
Can time line scheduling also accommodate aperiodic tasks ?
7. Rate Monotonic Scheduling
RM is optimal among all fixed Priority assignment schedules.
Why?
How can you how show that it must be optimal?
Which is clearly non-optimal
8. Rate Monotonic – Calc of ULUB for Two Tasks
Let , the number of
Then the schedule produced by RM satisfies one of two conditions:
for Uub
Since this is the critical time zone
for Uub
13. Example: Comparing RM to EDF
Since U > ln 2 = 0.69, Schedulability can’t be guaranteed using Rate Monotonic
14. Deadline Monotonic
The Deadline Monotonic priority assignment weakens the “period equals
deadline” constraint within a static scheduling scheme. Each periodic task
is characterized by four parameters:
which have the following relationships:
15. Comparison of Fixed Priority & Dynamic Priority Scheduling
Categories:
Fixed Priority: Time-Line (Cyclic)
Rate Monotonic (RM)
Dynamic: Earliest Deadline First (EDF)
Comparison:
Fixed Priority: Can be done off-line,
Easier to implement.
Dynamic: Can exploit 100% of processor bandwidth
(RM can uses < 69% in the worst case),
Typically uses less context switches (?),
Handles overloads more gracefully
(Fixed Priority breaks down on overload).
Why does Earliest Deadline First work so well? How does it handle
aperiodic tasks? What is its Achilles heel?