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Paper Abstract and Keywords
Presentation 2017-03-10 10:05
Multitask Scheduling Method for Reducing Total Heap Memory Usage under Deadline Constraints
Yuto Suzuki, Akio Nakata (Hiroshima City Univ.) SS2016-76
Abstract (in Japanese) (See Japanese page) 
(in English) Multitasking systems, often used in embedded software, require in general larger memory footprint than single tasking systems. To cope with the problem, we have formerly proposed a multitask scheduling method for reducing total heap memory usage. In the former method, at each scheduling point during the execution, a task with the minimum memory requirement in the next step execution is always selected for the next step execution. However, there is a problem that the former method cannot perform scheduling when deadline constraints are imposed, as is usual in a real time system. In this paper, we propose a real-time scheduling method which also try to reduce total heap memory usage by extending the former (non-real-time) scheduling method. In the proposed method, before selecting a task for execution, it predicts whether or not all the pending tasks can be scheduled when EDF scheduling are used. Here we choose EDF scheduling as the base real-time scheduling method as it is considered optimal in a single processor environment. Normally the proposed method schedules tasks using the former method to save the heap memory usage, and when the tasks are predicted to miss the deadline if EDF scheduling are used, it switches the scheduling method into the EDF scheduling to conform the deadline constraints.
Keyword (in Japanese) (See Japanese page) 
(in English) Multitask Scheduling / Heap Memory / Deadline Constraints / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 512, SS2016-76, pp. 97-102, March 2017.
Paper # SS2016-76 
Date of Issue 2017-03-02 (SS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SS  
Conference Date 2017-03-09 - 2017-03-10 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To SS 
Conference Code 2017-03-SS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multitask Scheduling Method for Reducing Total Heap Memory Usage under Deadline Constraints 
Sub Title (in English)  
Keyword(1) Multitask Scheduling  
Keyword(2) Heap Memory  
Keyword(3) Deadline Constraints  
1st Author's Name Yuto Suzuki  
1st Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
2nd Author's Name Akio Nakata  
2nd Author's Affiliation Hiroshima City University (Hiroshima City Univ.)
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Date Time 2017-03-10 10:05:00 
Presentation Time 25 
Registration for SS 
Paper # IEICE-SS2016-76 
Volume (vol) IEICE-116 
Number (no) no.512 
Page pp.97-102 
#Pages IEICE-6 
Date of Issue IEICE-SS-2017-03-02 

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