Analysis of FreeRTOS Overheads on Periodic Tasks

Miranda, Bruno Dourado; Oliveira, Rômulo Silva de; Carminati, Andreu

doi:10.5753/wperformance.2021.15728

Cited by 2 publications

(2 citation statements)

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“…Consequently, the response time of Task 3 was 11.106s that was longer than that simulated by SimSo simulator as the overhead of context switch was not considered. This is in agreement with a recent work that reported the temporal analysis of FreeRTOS context switch overheads [24]. Particularly, task switching (i.e.…”

Section: Task Scheduling Without Pre-emptionsupporting

confidence: 93%

“…Particularly, task switching (i.e. vTaskSwitchContext that has three steps of store, select, and load process) is the greatest source of time variation in the FreeRTOS context switch algorithm [24]. This indicates that there is a need to avoid unnecessary pre-emption in a periodic system to avoid unnecessary context switch overhead.…”

Section: Task Scheduling Without Pre-emptionmentioning

confidence: 99%

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An Integration of Open-Source Resources in Distance Teaching for Real-Time Embedded System Using Arduino Microcontroller and Freertos

Chia¹

2022

IJIE

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Distance learning has become a crucial alternativein education system worldwide since the Covid-19 pandemic happened. An affordable and accessible solution is essentialto enable a quality remote teaching and learning experience for each student. Real-Time Embedded System (RTES) is about applying real-time system in an embedded system (e.g., microcontroller) in ways that both logical and temporal requirements are fulfilled. A special attention shall be on the temporal response analysis so that students can have a clear distinction between microcontrollers with and without real-time system.Since there is a lack of accessible traceable studies about how to utilize the open-source platform inintroducing the key RTES concepts, this study aims to evaluate the feasibility of an integration of open-source resources (i.e., SimSo simulator, Arduino platform and FreeRTOSAPI) in teaching RTES remotely and to provide real-time learning experience about RTES concepts without additional components or wiring out of school. First, each student was introduced to the ways to integrate existing open-source resources so that each of them could develop RTES in their placesusing a FreeRTOS compatible microcontroller.RTES concepts of task, hyperperiod, task scheduling, pre-emption,static-priority scheduling algorithms, and mutual exclusion in resource sharing were delivered using the proposed infrastructure. Results show that an obvious context switch could be observed when pre-emption happened. Finding indicates that the proposed integration was useful for students to understand the complex RTES concepts e.g., task scheduling, pre-emption, and mutuallyexclusion.Since positive responses were received from students in two consecutive semesters, the proposed infrastructure is an affordable and accessible distance learning alternative in assisting students to understand RTES concepts.

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Section: Task Scheduling Without Pre-emptionsupporting

confidence: 93%

Section: Task Scheduling Without Pre-emptionmentioning

confidence: 99%