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Documents authored by Cucu-Grosjean, Liliana

Document
Invited Paper
DOI: 10.4230/OASIcs.WCET.2024.6
Invited Paper: Statistical, Stochastic or Probabilistic (Worst-Case Execution) Execution Time? - What Impact on the Multicore Composability

Authors: Liliana Cucu-Grosjean

Published in: OASIcs, Volume 121, 22nd International Workshop on Worst-Case Execution Time Analysis (WCET 2024)

Abstract
The problem of estimating worst-case execution times of programs on processors has appeared within the context of critical industries like avionics or space. Rapidly adopted by the real-time scheduling community, worst-case execution time estimates of programs or tasks are mandatory to understand the time behaviour of a real-time system. Analyzing such time behaviour is done, often, with an important pessimism due to the consideration of worst-case scenarios. A decreased pessimism has been obtained by understanding that large execution times of a program have low probability of appearance. Probabilistic (worst-case) execution time notion has been proposed. Nevertheless, independence hypotheses makes difficult today to calculate the probabilistic worst-case execution time of a program and current approaches are built, often, on statistical estimators based on the use of Extreme Value Theory or concentration inequalities. Thus, future probabilistic time analyses are expected to consider worst-case execution times estimates obtained by using statistical estimators on measured execution times instead of probabilistic (worst-case) execution times estimations. Within this paper, we discuss the opportunity of differentiating probabilistic (worst-case) execution times from statistical (worst-case) execution times and how dependence between execution times are better or easier captured by each of the definition, while stochastic execution times could be, also, an appropriate alternative.
Cite as

Liliana Cucu-Grosjean. Invited Paper: Statistical, Stochastic or Probabilistic (Worst-Case Execution) Execution Time? - What Impact on the Multicore Composability. In 22nd International Workshop on Worst-Case Execution Time Analysis (WCET 2024). Open Access Series in Informatics (OASIcs), Volume 121, pp. 6:1-6:10, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2024)

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@InProceedings{cucugrosjean:OASIcs.WCET.2024.6,
  author =	{Cucu-Grosjean, Liliana},
  title =	{{Invited Paper: Statistical, Stochastic or Probabilistic (Worst-Case Execution) Execution Time? - What Impact on the Multicore Composability}},
  booktitle =	{22nd International Workshop on Worst-Case Execution Time Analysis (WCET 2024)},
  pages =	{6:1--6:10},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-346-1},
  ISSN =	{2190-6807},
  year =	{2024},
  volume =	{121},
  editor =	{Carle, Thomas},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.WCET.2024.6},
  URN =		{urn:nbn:de:0030-drops-204746},
  doi =		{10.4230/OASIcs.WCET.2024.6},
  annote =	{Keywords: Worst-case execution time, probabilistic analyses, statistical estimator}
}
Document
DOI: 10.4230/LITES-v006-i001-a003
A Survey of Probabilistic Timing Analysis Techniques for Real-Time Systems

Authors: Robert I. Davis and Liliana Cucu-Grosjean

Published in: LITES, Volume 6, Issue 1 (2019). Leibniz Transactions on Embedded Systems, Volume 6, Issue 1

Abstract
This survey covers probabilistic timing analysis techniques for real-time systems. It reviews and critiques the key results in the field from its origins in 2000 to the latest research published up to the end of August 2018. The survey provides a taxonomy of the different methods used, and a classification of existing research. A detailed review is provided covering the main subject areas: static probabilistic timing analysis, measurement-based probabilistic timing analysis, and hybrid methods. In addition, research on supporting mechanisms and techniques, case studies, and evaluations is also reviewed. The survey concludes by identifying open issues, key challenges and possible directions for future research.
Cite as

Robert I. Davis and Liliana Cucu-Grosjean. A Survey of Probabilistic Timing Analysis Techniques for Real-Time Systems. In LITES, Volume 6, Issue 1 (2019). Leibniz Transactions on Embedded Systems, Volume 6, Issue 1, pp. 03:1-03:60, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@Article{davis_et_al:LITES-v006-i001-a003,
  author =	{Davis, Robert I. and Cucu-Grosjean, Liliana},
  title =	{{A Survey of Probabilistic Timing Analysis Techniques for Real-Time Systems}},
  journal =	{Leibniz Transactions on Embedded Systems},
  pages =	{03:1--03:60},
  ISSN =	{2199-2002},
  year =	{2019},
  volume =	{6},
  number =	{1},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LITES-v006-i001-a003},
  doi =		{10.4230/LITES-v006-i001-a003},
  annote =	{Keywords: Probabilistic, real-time, timing analysis}
}
Document
DOI: 10.4230/LITES-v006-i001-a004
A Survey of Probabilistic Schedulability Analysis Techniques for Real-Time Systems

Authors: Robert I. Davis and Liliana Cucu-Grosjean

Published in: LITES, Volume 6, Issue 1 (2019). Leibniz Transactions on Embedded Systems, Volume 6, Issue 1

Abstract
This survey covers schedulability analysis techniques for probabilistic real-time systems. It reviews the key results in the field from its origins in the late 1980s to the latest research published up to the end of August 2018. The survey outlinesfundamental concepts and highlights key issues. It provides a taxonomy of the different methods used, and a classification of existing research. A detailed review is provided covering the main subject areas as well as research on supporting techniques. The survey concludes by identifying open issues, key challenges and possible directions for future research.
Cite as

Robert I. Davis and Liliana Cucu-Grosjean. A Survey of Probabilistic Schedulability Analysis Techniques for Real-Time Systems. In LITES, Volume 6, Issue 1 (2019). Leibniz Transactions on Embedded Systems, Volume 6, Issue 1, pp. 04:1-04:53, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@Article{davis_et_al:LITES-v006-i001-a004,
  author =	{Davis, Robert I. and Cucu-Grosjean, Liliana},
  title =	{{A Survey of Probabilistic Schedulability Analysis Techniques for Real-Time Systems}},
  journal =	{Leibniz Transactions on Embedded Systems},
  pages =	{04:1--04:53},
  ISSN =	{2199-2002},
  year =	{2019},
  volume =	{6},
  number =	{1},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LITES-v006-i001-a004},
  doi =		{10.4230/LITES-v006-i001-a004},
  annote =	{Keywords: Probabilistic, real-time, schedulability analysis, scheduling, }
}
Document
DOI: 10.4230/DagRep.7.3.70
Mixed Criticality on Multicore / Manycore Platforms (Dagstuhl Seminar 17131)

Authors: Liliana Cucu-Grosjean, Robert Davis, Sanjoy K. Baruah, and Zoë Stephenson

Published in: Dagstuhl Reports, Volume 7, Issue 3 (2017)

Abstract
This report provides an overview of the discussions, the program and the outcomes of the second Dagstuhl Seminar on Mixed Criticality on Multicore/Manycore Platforms. The seminar brought together researchers working on mixed criticality real-time applications, industrialists from the aerospace, railway, and automotive industries, and experts in certification.
Cite as

Liliana Cucu-Grosjean, Robert Davis, Sanjoy K. Baruah, and Zoë Stephenson. Mixed Criticality on Multicore / Manycore Platforms (Dagstuhl Seminar 17131). In Dagstuhl Reports, Volume 7, Issue 3, pp. 70-98, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@Article{cucugrosjean_et_al:DagRep.7.3.70,
  author =	{Cucu-Grosjean, Liliana and Davis, Robert and Baruah, Sanjoy K. and Stephenson, Zo\"{e}},
  title =	{{Mixed Criticality on Multicore / Manycore Platforms (Dagstuhl Seminar 17131)}},
  pages =	{70--98},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2017},
  volume =	{7},
  number =	{3},
  editor =	{Cucu-Grosjean, Liliana and Davis, Robert and Baruah, Sanjoy K. and Stephenson, Zo\"{e}},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagRep.7.3.70},
  URN =		{urn:nbn:de:0030-drops-73622},
  doi =		{10.4230/DagRep.7.3.70},
  annote =	{Keywords: mixed-criticality multicore manycore real-time-systems}
}
Document
DOI: 10.4230/DagRep.5.3.84
Mixed Criticality on Multicore/Manycore Platforms (Dagstuhl Seminar 15121)

Authors: Sanjoy K. Baruah, Liliana Cucu-Grosjean, Roabert I. Davis, and Claire Maiza

Published in: Dagstuhl Reports, Volume 5, Issue 3 (2015)

Abstract
This report provides an overview of the discussions, the program and the outcomes of the first Dagstuhl Seminar on Mixed Criticality on multicore/Manycore Platforms. The seminar brought together researchers working on challenges related to executing mixed criticality real-time applications on multicore and manycore architectures with the main purpose of promoting a closer interaction between the sub-communities involved in real-time scheduling, real-time operating systems / runtime environments, and timing analysis as well as interaction with specialists in hardware architectures.
Cite as

Sanjoy K. Baruah, Liliana Cucu-Grosjean, Roabert I. Davis, and Claire Maiza. Mixed Criticality on Multicore/Manycore Platforms (Dagstuhl Seminar 15121). In Dagstuhl Reports, Volume 5, Issue 3, pp. 84-142, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@Article{baruah_et_al:DagRep.5.3.84,
  author =	{Baruah, Sanjoy K. and Cucu-Grosjean, Liliana and Davis, Roabert I. and Maiza, Claire},
  title =	{{Mixed Criticality on Multicore/Manycore Platforms (Dagstuhl Seminar 15121)}},
  pages =	{84--142},
  journal =	{Dagstuhl Reports},
  ISSN =	{2192-5283},
  year =	{2015},
  volume =	{5},
  number =	{3},
  editor =	{Baruah, Sanjoy K. and Cucu-Grosjean, Liliana and Davis, Roabert I. and Maiza, Claire},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagRep.5.3.84},
  URN =		{urn:nbn:de:0030-drops-52707},
  doi =		{10.4230/DagRep.5.3.84},
  annote =	{Keywords: Mixed-Criticality, Real-time systems, Multicore/Manycore Platforms, fixed priority; probabilistic scheduling, varying-speed processors model combination}
}
Document
DOI: 10.4230/DagSemProc.10071.3
10071 Open Problems – Scheduling

Authors: Jim Anderson, Björn Andersson, Yossi Azar, Nikhil Bansal, Enrico Bini, Marek Chrobak, José Correa, Liliana Cucu-Grosjean, Rob Davis, Arvind Easwaran, Jeff Edmonds, Shelby Funk, Sathish Gopalakrishnan, Han Hoogeveen, Claire Mathieu, Nicole Megow, Seffi Naor, Kirk Pruhs, Maurice Queyranne, Adi Rosén, Nicolas Schabanel, Jiří Sgall, René Sitters, Sebastian Stiller, Marc Uetz, Tjark Vredeveld, and Gerhard J. Woeginger

Published in: Dagstuhl Seminar Proceedings, Volume 10071, Scheduling (2010)

Abstract
Collection of the open problems presented at the scheduling seminar.
Cite as

Jim Anderson, Björn Andersson, Yossi Azar, Nikhil Bansal, Enrico Bini, Marek Chrobak, José Correa, Liliana Cucu-Grosjean, Rob Davis, Arvind Easwaran, Jeff Edmonds, Shelby Funk, Sathish Gopalakrishnan, Han Hoogeveen, Claire Mathieu, Nicole Megow, Seffi Naor, Kirk Pruhs, Maurice Queyranne, Adi Rosén, Nicolas Schabanel, Jiří Sgall, René Sitters, Sebastian Stiller, Marc Uetz, Tjark Vredeveld, and Gerhard J. Woeginger. 10071 Open Problems – Scheduling. In Scheduling. Dagstuhl Seminar Proceedings, Volume 10071, pp. 1-24, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2010)

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@InProceedings{anderson_et_al:DagSemProc.10071.3,
  author =	{Anderson, Jim and Andersson, Bj\"{o}rn and Azar, Yossi and Bansal, Nikhil and Bini, Enrico and Chrobak, Marek and Correa, Jos\'{e} and Cucu-Grosjean, Liliana and Davis, Rob and Easwaran, Arvind and Edmonds, Jeff and Funk, Shelby and Gopalakrishnan, Sathish and Hoogeveen, Han and Mathieu, Claire and Megow, Nicole and Naor, Seffi and Pruhs, Kirk and Queyranne, Maurice and Ros\'{e}n, Adi and Schabanel, Nicolas and Sgall, Ji\v{r}{\'\i} and Sitters, Ren\'{e} and Stiller, Sebastian and Uetz, Marc and Vredeveld, Tjark and Woeginger, Gerhard J.},
  title =	{{10071 Open Problems – Scheduling}},
  booktitle =	{Scheduling},
  pages =	{1--24},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2010},
  volume =	{10071},
  editor =	{Susanne Albers and Sanjoy K. Baruah and Rolf H. M\"{o}hring and Kirk Pruhs},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.10071.3},
  URN =		{urn:nbn:de:0030-drops-25367},
  doi =		{10.4230/DagSemProc.10071.3},
  annote =	{Keywords: Open problems, scheduling}
}
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