Multicore scheduling in automotive ECUs
Identifieur interne : 002561 ( Hal/Checkpoint ); précédent : 002560; suivant : 002562Multicore scheduling in automotive ECUs
Auteurs : Aurélien Monot [France] ; Nicolas Navet [France] ; Bernard Bavoux [France] ; Françoise Simonot-Lion [France]Source :
English descriptors
Abstract
As the demand for computing power is quickly increasing in the automotive domain, car manufacturers and tier-one suppliers are gradually introducing multicore ECUs in their electronic architectures. Additionally, these multicore ECUs offer new features such as higher levels of parallelism which eases the espect of the safety requirements introduced by the ISO 26262 and can be taken advantage of in various other automotive use-cases. These new features involve also more complexity in the design, development and verification of the software applications. Hence, OEMs and suppliers will require new tools and methodologies for eployment and validation. In this paper, we present the main use-cases for multicore ECUs and then focus on one of them. Precisely, we address the problem of scheduling numerous elementary software components (called runnables) on a limited set of identical cores. In the context of an automotive design, we assume the use of the static task partitioning scheme which provides simplicity and better predictability for the ECU designers by comparison with a global scheduling approach. We show how the global scheduling problem can be addressed as two sub problems: partitioning the set of runnables and building the schedule on each core. At that point, we prove that each of the sub-problems cannot be solved optimally due to their algorithmic complexity. We then present low complexity heuristics to partition and build a schedule of the runnable set on each core before discussing schedulability verification methods. Finally, we assess the performance of our approach on realistic case-studies.
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type="end">2011-12-31</date><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-2496" type="direct"><org type="laboratory" xml:id="struct-2496" status="OLD"><orgName>INRIA Lorraine</orgName><desc><address><addrLine>615 rue du Jardin Botanique 54600 Villers-lès-Nancy</addrLine><country key="FR"></country></address><ref type="url">http://www.inria.fr/centre-de-recherche-inria/nancy-grand-est</ref></desc><listRelation><relation active="#struct-300009" type="direct"></relation></listRelation></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université Nancy 2</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Institut national polytechnique de Lorraine</orgName><orgName type="institution" wicri:auto="newGroup">Université de Lorraine</orgName></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>AUTOSAR</term><term>load balancing</term><term>multicore ECU</term><term>offsets</term><term>static cyclic scheduling</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">As the demand for computing power is quickly increasing in the automotive domain, car manufacturers and tier-one suppliers are gradually introducing multicore ECUs in their electronic architectures. Additionally, these multicore ECUs offer new features such as higher levels of parallelism which eases the espect of the safety requirements introduced by the ISO 26262 and can be taken advantage of in various other automotive use-cases. These new features involve also more complexity in the design, development and verification of the software applications. Hence, OEMs and suppliers will require new tools and methodologies for eployment and validation. In this paper, we present the main use-cases for multicore ECUs and then focus on one of them. Precisely, we address the problem of scheduling numerous elementary software components (called runnables) on a limited set of identical cores. In the context of an automotive design, we assume the use of the static task partitioning scheme which provides simplicity and better predictability for the ECU designers by comparison with a global scheduling approach. We show how the global scheduling problem can be addressed as two sub problems: partitioning the set of runnables and building the schedule on each core. At that point, we prove that each of the sub-problems cannot be solved optimally due to their algorithmic complexity. We then present low complexity heuristics to partition and build a schedule of the runnable set on each core before discussing schedulability verification methods. Finally, we assess the performance of our approach on realistic case-studies.</div></front></TEI><hal api="V3"><titleStmt><title xml:lang="ro">Multicore scheduling in automotive ECUs</title><author role="aut"><persName><forename type="first">Aurélien</forename><surname>Monot</surname></persName><email>aurelien.monot@inria.fr</email><idno type="halauthor">554439</idno><affiliation ref="#struct-2406"></affiliation></author><author role="aut"><persName><forename type="first">Nicolas</forename><surname>Navet</surname></persName><email>Nicolas.Navet@loria.fr</email><idno type="halauthor">224730</idno><orgName ref="#struct-300009"></orgName><affiliation ref="#struct-2406"></affiliation></author><author role="aut"><persName><forename type="first">Bernard</forename><surname>Bavoux</surname></persName><email></email><idno type="halauthor">450824</idno><orgName ref="#struct-303568"></orgName><affiliation ref="#struct-7736"></affiliation></author><author role="aut"><persName><forename type="first">Françoise</forename><surname>Simonot-Lion</surname></persName><email>simonot@inria.fr</email><idno type="halauthor">554440</idno><affiliation ref="#struct-2406"></affiliation></author><editor role="depositor"><persName><forename>Aurélien</forename><surname>Monot</surname></persName><email>aurelien.monot@loria.fr</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2011-01-04 13:28:32</date><date type="whenModified">2016-05-19 01:09:20</date><date type="whenReleased">2011-01-05 09:17:34</date><date type="whenProduced">2010-05-19</date><date type="whenEndEmbargoed">2011-01-04</date><ref type="file" target="https://hal.inria.fr/inria-00543179/document"><date notBefore="2011-01-04"></date></ref><ref type="file" subtype="author" n="1" target="https://hal.inria.fr/inria-00543179/file/ERTS2010_0097_final.pdf"><date notBefore="2011-01-04"></date></ref></edition><respStmt><resp>contributor</resp><name key="143687"><persName><forename>Aurélien</forename><surname>Monot</surname></persName><email>aurelien.monot@loria.fr</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">inria-00543179</idno><idno type="halUri">https://hal.inria.fr/inria-00543179</idno><idno type="halBibtex">monot:inria-00543179</idno><idno type="halRefHtml">Embedded Real Time Software and Systems - ERTSS 2010, May 2010, Toulouse, France. 2010</idno><idno type="halRef">Embedded Real Time Software and Systems - ERTSS 2010, May 2010, Toulouse, France. 2010</idno></publicationStmt><seriesStmt><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="INRIA">INRIA - Institut National de Recherche en Informatique et en Automatique</idno><idno type="stamp" n="INPL">Institut National Polytechnique de Lorraine</idno><idno type="stamp" n="LORIA2">Publications du LORIA</idno><idno type="stamp" n="INRIA-NANCY-GRAND-EST">INRIA Nancy - Grand Est</idno><idno type="stamp" n="LORIA">LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications</idno><idno type="stamp" n="LORIA-NSS" p="LORIA">Réseaux, systèmes et services</idno><idno type="stamp" n="UNIV-LORRAINE">Université de Lorraine</idno><idno type="stamp" n="INRIA-LORRAINE">INRIA Nancy - Grand Est</idno><idno type="stamp" n="LABO-LORIA-SET" p="LORIA">LABO-LORIA-SET</idno></seriesStmt><notesStmt><note type="audience" n="2">International</note><note type="invited" n="0">No</note><note type="popular" n="0">No</note><note type="peer" n="1">Yes</note><note type="proceedings" n="1">Yes</note></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="ro">Multicore scheduling in automotive ECUs</title><author role="aut"><persName><forename type="first">Aurélien</forename><surname>Monot</surname></persName><email>aurelien.monot@inria.fr</email><idno type="halAuthorId">554439</idno><affiliation ref="#struct-2406"></affiliation></author><author role="aut"><persName><forename type="first">Nicolas</forename><surname>Navet</surname></persName><email>Nicolas.Navet@loria.fr</email><idno type="halAuthorId">224730</idno><orgName ref="#struct-300009"></orgName><affiliation ref="#struct-2406"></affiliation></author><author role="aut"><persName><forename type="first">Bernard</forename><surname>Bavoux</surname></persName><idno type="halAuthorId">450824</idno><orgName ref="#struct-303568"></orgName><affiliation ref="#struct-7736"></affiliation></author><author role="aut"><persName><forename type="first">Françoise</forename><surname>Simonot-Lion</surname></persName><email>simonot@inria.fr</email><idno type="halAuthorId">554440</idno><affiliation ref="#struct-2406"></affiliation></author></analytic><monogr><meeting><title>Embedded Real Time Software and Systems - ERTSS 2010</title><date type="start">2010-05-19</date><date type="end">2010-05-21</date><settlement>Toulouse</settlement><country key="FR">France</country></meeting><imprint><date type="datePub">2010-05-19</date></imprint></monogr></biblStruct></sourceDesc><profileDesc><langUsage><language ident="en">English</language></langUsage><textClass><keywords scheme="author"><term xml:lang="en">multicore ECU</term><term xml:lang="en">AUTOSAR</term><term xml:lang="en">static cyclic scheduling</term><term xml:lang="en">load balancing</term><term xml:lang="en">offsets</term></keywords><classCode scheme="halDomain" n="info.info-es">Computer Science [cs]/Embedded Systems</classCode><classCode scheme="halTypology" n="COMM">Conference papers</classCode></textClass><abstract xml:lang="en">As the demand for computing power is quickly increasing in the automotive domain, car manufacturers and tier-one suppliers are gradually introducing multicore ECUs in their electronic architectures. Additionally, these multicore ECUs offer new features such as higher levels of parallelism which eases the espect of the safety requirements introduced by the ISO 26262 and can be taken advantage of in various other automotive use-cases. These new features involve also more complexity in the design, development and verification of the software applications. Hence, OEMs and suppliers will require new tools and methodologies for eployment and validation. In this paper, we present the main use-cases for multicore ECUs and then focus on one of them. Precisely, we address the problem of scheduling numerous elementary software components (called runnables) on a limited set of identical cores. In the context of an automotive design, we assume the use of the static task partitioning scheme which provides simplicity and better predictability for the ECU designers by comparison with a global scheduling approach. We show how the global scheduling problem can be addressed as two sub problems: partitioning the set of runnables and building the schedule on each core. At that point, we prove that each of the sub-problems cannot be solved optimally due to their algorithmic complexity. We then present low complexity heuristics to partition and build a schedule of the runnable set on each core before discussing schedulability verification methods. Finally, we assess the performance of our approach on realistic case-studies.</abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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