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Paper Abstract and Keywords
Presentation 2021-03-26 14:20
IPC control mechanism for highly efficient RT-DVFS
Atsushi Santo, Nobuyuki Yamasaki (Keio Univ.) CPSY2020-65 DC2020-95
Abstract (in Japanese) (See Japanese page) 
(in English) Embedded real-time systems requires power consumption while satisfying real-time performance. RT-DVFS and real-time scheduling methods are applied respectively to guarantee performance. Responsive Multithreaded Processor (RMTP) is a Simultaneous Multithreading (SMT) processor for embedded real-time systems. It implements an IPC control mechanism that controls the execution speed of threads. By using the IPC control mechanism, Fluid schedule, which is an optimal scheduling algorithm, can be achieved with a very small overhead. By combining Fluid Schedule with the IPC control mechanism and RT-DVFS, it is possible to reduce power consumption while guaranteeing real-time performance. However, IPC control mechanism cannot extract Thread Level Parallelism (TLP) insufficiently, and resource utilization becomes poor. In this study, we propose a method for effectively extracting TLP to improve resource utilization during IPC control. It enables to operate the system at a lower frequency during RT-DVFS. As a result of evaluation by simulation, it was confirmed that the proposed method improves resource utilization and enables efficient reduction of power consumption.
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Reference Info. IEICE Tech. Rep., vol. 120, no. 435, CPSY2020-65, pp. 91-96, March 2021.
Paper # CPSY2020-65 
Date of Issue 2021-03-18 (CPSY, DC) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee CPSY DC IPSJ-SLDM IPSJ-EMB IPSJ-ARC  
Conference Date 2021-03-25 - 2021-03-26 
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 2021-03-CPSY-DC-SLDM-EMB-ARC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) IPC control mechanism for highly efficient RT-DVFS 
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1st Author's Name Atsushi Santo  
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
Date Time 2021-03-26 14:20:00 
Presentation Time 20 
Registration for CPSY 
Paper # IEICE-CPSY2020-65,IEICE-DC2020-95 
Volume (vol) IEICE-120 
Number (no) no.435(CPSY), no.436(DC) 
Page pp.91-96 
#Pages IEICE-6 
Date of Issue IEICE-CPSY-2021-03-18,IEICE-DC-2021-03-18 


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