scholarly journals Performance analysis comparison between non mixed-criticality and mixed-criticality system in microcontroller

2019 ◽  
Vol 15 (2) ◽  
pp. 678
Author(s):  
Siti Nurhafizza Maidin ◽  
Noor Azurati Ahmad ◽  
Kamilia Kamardin ◽  
Shamsul Sahibuddin ◽  
Syahrizal Fadhlie Sabri
Keyword(s):  
Embedded System ◽  
Real Time ◽  
Dynamic Power Management ◽  
Task Execution ◽  
Real Time System ◽  
Real Time Scheduling ◽  
Time Scheduling ◽  
Save Energy ◽  
Main Component ◽  
Mixed Criticality

<span>Nowadays, implementation of real-time embedded system or safety-critical in a real-time system is significant within emerging technologies because the system involves many aspects such as safety and task execution without missing deadlines. The main cause of implementation is to avoid catastrophic loss. Besides that, effectuation of the mixed-criticality system in embedded system making system more complex for task execution. For an embedded system, the main component involves real-time scheduling. The implementation of DPM method in real-time scheduling is well known, but in the mixed-criticality system, DPM method is still lacking. In order to cater this problem, Dynamic Power management (DPM) method is deployed onto the microcontroller of the mixed-criticality system to save energy when executing tasks in order to have better performance in the system. The usage of the DPM method in mixed-criticality of microcontroller resulting decrease of 0.82% in LED output voltage value meanwhile, for the LCD output, the voltage value decreased by 1.37% in the home alarm system. Thus, the energy-saving in the microcontroller of the mixed-criticality system using the DPM method is defined.</span>

scholarly journals Towards compositional mixed-criticality real-time scheduling in open systems

2016 ◽  
Vol 13 (3) ◽  
pp. 49-51 ◽  
Author(s):  
Jaewoo Lee ◽  
Hoon Sung Chwa ◽  
Arvind Easwaran ◽  
Insik Shin ◽  
Insup Lee
Keyword(s):  
Real Time ◽  
Open Systems ◽  
Real Time Scheduling ◽  
Time Scheduling ◽  
Mixed Criticality

Scheduling Mixed-Criticality Real-Time Tasks in a Fault-Tolerant System

2015 ◽  
Vol 6 (2) ◽  
pp. 65-86 ◽  
Author(s):  
Jian (Denny) Lin ◽  
Albert M. K. Cheng ◽  
Doug Steel ◽  
Michael Yu-Chi Wu ◽  
Nanfei Sun
Keyword(s):  
Real Time ◽  
Fault Tolerant ◽  
Formal Proof ◽  
Worst Case ◽  
Real Time Scheduling ◽  
Important Trend ◽  
Time Scheduling ◽  
On Line ◽  
Computer Tasks ◽  
Mixed Criticality

Enabling computer tasks with different levels of criticality running on a common hardware platform has been an increasingly important trend in the design of real-time and embedded systems. On such systems, a real-time task may exhibit different WCETs (Worst Case Execution Times) in different criticality modes. It is well-known that traditional real-time scheduling methods are not applicable to ensure the timely requirement of the mixed-criticality tasks. In this paper, the authors study a problem of scheduling real-time, mixed-criticality tasks with fault tolerance. An optimal, off-line algorithm is designed to guarantee the most tasks completing successfully when the system runs into the high-criticality mode. A formal proof of the optimality is given. Also, a novel on-line slack-reclaiming algorithm is proposed to recover from computing faults before the tasks' deadline during the run-time. Simulations show that an improvement of about 30% in performance is obtained by using the slack-reclaiming method.

scholarly journals T-L Plane Based Real-Time Scheduling Using Dynamic Power Management

2015 ◽  
Vol E98.D (8) ◽  
pp. 1596-1599 ◽  
Author(s):  
Youngmin KIM ◽  
Ki-Seong LEE ◽  
Byunghak KWAK ◽  
Chan-Gun LEE
Keyword(s):  
Real Time ◽  
Power Management ◽  
Dynamic Power Management ◽  
Dynamic Power ◽  
Real Time Scheduling ◽  
Time Scheduling

New Hybrid Genetic Based Approach for Real-Time Scheduling of Reconfigurable Embedded Systems

2018 ◽  
Vol 10 (1) ◽  
pp. 23-36
Author(s):  
Ibrahim Gharbi ◽  
Hamza Gharsellaoui ◽  
Sadok Bouamama
Keyword(s):  
Embedded System ◽  
Real Time ◽  
Scheduling Algorithm ◽  
Journal Article ◽  
Real Time Systems ◽  
Software Faults ◽  
Real Time Scheduling ◽  
Time Scheduling ◽  
Algorithmic Approaches ◽  
Time Systems

This journal article deals with the problem of real-time scheduling of operating systems (OS) tasks by a hybrid genetic-based scheduling algorithm. Indeed, most of real-time systems are framed with aid of priority-based scheduling algorithms. Nevertheless, when such a scenario is applied to save the system at the occurrence of hardware-software faults, or to improve its performance, some real-time properties can be violated at run-time. In contrast, most of the applications of real-time systems are based on timing constraints, i.e. OS tasks should be scheduled properly to finish their execution within the time specified by the real-time systems. For this reason, the authors propose in their article, a hybrid genetic-based scheduling approach that automatically checks the systems feasibility after any reconfiguration scenario was applied to an embedded system. A benchmark example is given, and the experimental results demonstrate the effectiveness of the originally proposed genetic-based scheduling approach over other such classical genetic algorithmic approaches.

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