Presentation 2018-01-18
Deadline Assignment Optimization Method Using Extended Time Petri Nets for Real-Time Multitask Distributed Systems Sharing Processors with EDF Scheduling
Reon Matsuoka, Akio Nakata,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In the development of embedded software which requires high reliability satisfaction of hard requirements for both computing resource and performance, it is useful to model the system’s behavior under specific computing resources and verify whether the system meet the performance requirements in the design phase of development. So far, we have proposed a method of verifying whether or not they can be scheduled in the worst case by converting the behavioral specification of real-time multi-task distributed systems into an extended Time Petri Nets that can describe fixed priority scheduling and dynamic-priority scheduling such as EDF. Especially in the early phase of the design process, it is useful for low-cost and/or low-power system design to allocate the time budgets among all tasks in order to satisfy its deadline requirement from the input to the output(end -to-end deadline). In this paper, we propose a method to optimize the time budgets of a multi-task behavioral specification using EDF scheduling that have pre-allocated time budgets among all tasks while satisfying the time constraints of the entire system such as end-to-end deadlines, by appropriately modifying the local deadline allocation of each task. . We evaluate the usefulness of the proposed method by applying the proposed method to some example specifications and try to improve its time budgets.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Embedded Software / Multiprocessor / Extended Time Petri Nets / Performance Verification / EDF
Paper # MSS2017-56,SS2017-43
Date of Issue 2018-01-11 (MSS, SS)

Conference Information
Committee SS / MSS
Conference Date 2018/1/18(2days)
Place (in Japanese) (See Japanese page)
Place (in English)
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Kazuhiro Ogata(JAIST) / Morikazu Nakamura(Univ. of Ryukyus)
Vice Chair Akio Nakata(Hiroshima City Univ.) / Shigemasa Takai(Osaka Univ.)
Secretary Akio Nakata(Tokyo Inst. of Tech.) / Shigemasa Takai(Osaka Univ.)
Assistant Kazuyuki Shima(Hiroshima City Univ.) / Hideki Kinjo(Okinawa Univ.)

Paper Information
Registration To Technical Committee on Software Science / Technical Committee on Mathematical Systems Science and its applications
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Deadline Assignment Optimization Method Using Extended Time Petri Nets for Real-Time Multitask Distributed Systems Sharing Processors with EDF Scheduling
Sub Title (in English)
Keyword(1) Embedded Software
Keyword(2) Multiprocessor
Keyword(3) Extended Time Petri Nets
Keyword(4) Performance Verification
Keyword(5) EDF
1st Author's Name Reon Matsuoka
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.)
Date 2018-01-18
Paper # MSS2017-56,SS2017-43
Volume (vol) vol.117
Number (no) MSS-380,SS-381
Page pp.pp.53-58(MSS), pp.53-58(SS),
#Pages 6
Date of Issue 2018-01-11 (MSS, SS)