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Paper Abstract and Keywords
Presentation 2022-03-11 14:30
Highly Efficient Mixed Criticality System Using Fluid Scheduling
Kosuke Yashima, Nobuyuki Yamasaki (Keio Univ.) CPSY2021-64 DC2021-98
Abstract (in Japanese) (See Japanese page) 
(in English) In recent real-time systems, it is necessary to deal with tasks whose execution time varies depending on the situation.
Mixed-criticality (MC) systems are capable of extending the worst-case execution time (WCET) in emergencies and executing tasks of high criticality while meeting the time constraints.
In recent years, multiprocessor control has become the mainstream of systems, and research on multiprocessor MC systems has been actively conducted.
MC-Fluid is a system that applies the optimal multiprocessor scheduling, Fluid Scheduling, to MC systems.
Although Fluid scheduling requires constant thread execution speed, MC-Fluid cannot be implemented in a real system because it is not feasible on general processors.
However, the IPC (Instruction Per Clock cycle) control mechanism implemented in the RMTP (Responsive MultiThreaded Processor) can control the execution speed of each thread of the SMT (Simultaneous MultiThreading) processor,
Fluid scheduling can be realized.
In this study, we combined Fluid scheduling using IPC control mechanism and MC-Fluid, and realized an MC system that can realize Fluid scheduling on RMTP.
Keyword (in Japanese) (See Japanese page) 
(in English) Embedded real-time system / Mixed Criticality / Fluid scheduling / SMT / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 425, CPSY2021-64, pp. 115-119, March 2022.
Paper # CPSY2021-64 
Date of Issue 2022-03-03 (CPSY, DC) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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)
Download PDF CPSY2021-64 DC2021-98

Conference Information
Committee CPSY DC IPSJ-SLDM IPSJ-EMB IPSJ-ARC  
Conference Date 2022-03-10 - 2022-03-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ETNET2021 
Paper Information
Registration To CPSY 
Conference Code 2022-03-CPSY-DC-SLDM-EMB-ARC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Highly Efficient Mixed Criticality System Using Fluid Scheduling 
Sub Title (in English)  
Keyword(1) Embedded real-time system  
Keyword(2) Mixed Criticality  
Keyword(3) Fluid scheduling  
Keyword(4) SMT  
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Keyword(8)  
1st Author's Name Kosuke Yashima  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Nobuyuki Yamasaki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2022-03-11 14:30:00 
Presentation Time 20 minutes 
Registration for CPSY 
Paper # CPSY2021-64, DC2021-98 
Volume (vol) vol.121 
Number (no) no.425(CPSY), no.426(DC) 
Page pp.115-119 
#Pages 5 
Date of Issue 2022-03-03 (CPSY, DC) 

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