Aspect-Oriented Customization of the Scheduling Algorithm and the Resource Access Protocol of a Real-Time Operating System

2013 ◽  
Author(s):  
Kazuki Abe ◽  
Myungryun Yoo ◽  
Takanori Yokoyama
Keyword(s):  
Operating System ◽  
Real Time ◽  
Scheduling Algorithm ◽  
Access Protocol ◽  
Resource Access ◽  
Real Time Operating System

scholarly journals Priority based round robin (PBRR) CPU scheduling algorithm

2019 ◽  
Vol 9 (1) ◽  
pp. 190
Author(s):  
Sonia Zouaoui ◽  
Lotfi Boussaid ◽  
Abdellatif Mtibaa
Keyword(s):  
Operating System ◽  
Real Time ◽  
Waiting Time ◽  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Turnaround Time ◽  
Round Robin ◽  
New Approach ◽  
Real Time Operating System ◽  
Cpu Scheduling

<p>This paper introduce a new approach for scheduling algorithms which aim to improve real time operating system CPU performance. This new approach of CPU Scheduling algorithm is based on the combination of round-robin (RR) and Priority based (PB) scheduling algorithms. This solution maintains the advantage of simple round robin scheduling algorithm, which is reducing starvation and integrates the advantage of priority scheduling. The proposed algorithm implements the concept of time quantum and assigning as well priority index to the processes. Existing round robin CPU scheduling algorithm cannot be dedicated to real time operating system due to their large waiting time, large response time, large turnaround time and less throughput. This new algorithm improves all the drawbacks of round robin CPU scheduling algorithm. In addition, this paper presents analysis comparing proposed algorithm with existing round robin scheduling algorithm focusing on average waiting time and average turnaround time.</p>

scholarly journals Analysis of thread schedulability in Huawei LiteOS

2021 ◽  
Vol 336 ◽  
pp. 05031
Author(s):  
Xiaochun Wang
Keyword(s):  
Operating System ◽  
Real Time ◽  
Scheduling Algorithm ◽  
Application Rate ◽  
Practical Application ◽  
Priority Scheduling ◽  
Real Time Operating System ◽  
Important Thing ◽  
Rate Monotonic ◽  
Rate Monotonic Scheduling

Huawei LiteOS is a real-time operating system. Thread schedulability is an important thing to be considered first when we use the RTOS in an application. There are a lot of methods to value thread schedulability in practical application. Rate monotonic scheduling algorithm is a widely used static priority scheduling algorithm. We discussed the thread schedulability in Huawei LiteOS.

scholarly journals Research on Real-Time System and Related Graph Task Model

2021 ◽  
Vol 2066 (1) ◽  
pp. 012054
Author(s):  
Juan Xiao ◽  
Song Wang ◽  
Sheng Duan ◽  
Shanglin Li
Keyword(s):  
Operating System ◽  
Real Time ◽  
Directed Graph ◽  
Scheduling Algorithm ◽  
Time Constraint ◽  
Time System ◽  
Real Time System ◽  
Real Time Operating System ◽  
Task Model ◽  
Time Accuracy

Abstract Generally speaking, real-time system is considered to be able to influence the environment by receiving and processing data, and returning calculation results rapid enough, so as to control the environment. In computer science, real-time system describes the software and hardware system affected by time constraints, and its correctness relies on the logical correctness of the function and the time when the result is generated. According to the main characteristics of real-time operating system, such as time constraint, predictability and reliability, it puts forward higher requirements for the time accuracy and reliability of real-time operating system. This paper first introduces the real-time system from its main characteristics, related concepts and scheduling algorithm. Then five classical graph based task models of real-time system are introduced. Finally, this paper introduces the directed graph realtime task model from two aspects of definition and semantics. As an extension of realtime system task model, directed graph real-time task model is considered to be able to provide real-time systems with stronger expressive power and support the formal study of time constraint problems.

Real-Time Operating System Standards

1991 ◽  
Vol 24 (2) ◽  
pp. 25-26
Author(s):  
C.D. Locke ◽  
R.P. Cook ◽  
K.D. Gordon ◽  
H. Tokuda
Keyword(s):  
Operating System ◽  
Real Time ◽  
Real Time Operating System
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