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283 results on '"Patt, Y."'

16. SysRT: A modular multiprocessor RTOS simulator for early design space exploration

Author

Xiao, J., Pimentel, A., Lipari, G., Patt, Y., Nandy, S.K., Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Université de Lille, École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), System and Network Engineering (IVI, FNWI), and IvI Research (FNWI)

Subjects
010302 applied physics, Computer science, business.industry, Design space exploration, Multiprocessing, 02 engineering and technology, Modular design, 01 natural sciences, 020202 computer hardware & architecture, Kernel (linear algebra), Software, Unified Modeling Language, SystemC, 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, computer, Real-time operating system, Simulation, ComputingMilieux_MISCELLANEOUS, computer.programming_language
Abstract

Modern embedded systems increasingly accommodate several applications running concurrently on a multiprocessor platform managed by a real-time operating system (RTOS). The increasing design complexity of such systems calls for good design tools to evaluate real-time performance during the very early stages of design. To this end, fast system-level simulators that allow for efficient hardware/software co-simulation are essential. In this paper, we present SysRT, a generic and highlevel RTOS simulator that is highly suited for early design space exploration (DSE). The simulator contains different types of application models and a modular RTOS kernel model, all developed in SystemC. Efficient and precise modeling of preemptive scheduling is achieved via an event-driven simulation approach, allowing simulations to be performed much faster than cycle-accurate simulations. At the same time, the kernel model is developed to be generic and modular to support for easy plugin of new schedulers as well as new resource sharing protocols. Comparing SysRT with state-of-art simulators, it achieves faster simulation speeds with an identically small simulation error. We demonstrate the flexibility of SysRT and its benefits for early DSE using experiments with a mixed workload executing on multiprocessor platforms with different numbers of cores.

Published
2017

18. Run-time Mapping Algorithm for Dynamic Workloads using Process Merging Transformations

Author

Sinaei, S., Fatemi, O., Pimentel, A.D., Patt, Y., Nandy, S.K., System and Network Engineering (IVI, FNWI), and IvI Research (FNWI)

Subjects
010302 applied physics, Computer science, Distributed computing, Process (computing), Kahn process networks, Brute-force search, 02 engineering and technology, Energy consumption, MPSoC, 01 natural sciences, 020202 computer hardware & architecture, Task (computing), Resource (project management), 0103 physical sciences, 0202 electrical engineering, electronic engineering, information engineering, Throughput (business)
Abstract

Exploration of task mappings has an important role to achieve high performance in heterogeneous multi-processor system-on-chip (MPSoC) platforms. The application workloads in modern MPSoC-based embedded systems are becoming increasingly dynamic. Different applications concurrently execute and contend for resources in such systems. In this paper, a run-time algorithm is proposed to analytically evaluate the system throughput of to-be-executed applications (modelled as Kahn Process Networks, KPNs) in order to quickly determine a proper resource binding for these applications. Merging transformations on the KPNs are applied to capture the cases in which the number of processes in the KPN is larger than the number of available processing resources, thereby modeling the effects of binding multiple processes to a single processor. We evaluated our algorithm using a heterogeneous MPSoC system with several applications. Our experimental results revealed that during runtime, the performance of selected mapping with regard to available resources is close to the optimal performance obtained by exhaustive search and simulation. Therefore, the results clearly confirm that our algorithm is effective.

Published
2017

26. OncoSurge: a strategy for improving resectability with curative intent in metastatic colorectal cancer.

Author

Poston, G.J., Adam, R., Alberts, S., Curley, S., Figueras, J., Haller, D., Kunstlinger, F., Mentha, G., Nordlinger, B., Patt, Y., Primrose, J., Roh, M., Rougier, P., Ruers, T.J.M., Schmoll, H.J., Valls, C., Vauthey, N.J., Cornelis, M., Kahan, J.P., Poston, G.J., Adam, R., Alberts, S., Curley, S., Figueras, J., Haller, D., Kunstlinger, F., Mentha, G., Nordlinger, B., Patt, Y., Primrose, J., Roh, M., Rougier, P., Ruers, T.J.M., Schmoll, H.J., Valls, C., Vauthey, N.J., Cornelis, M., and Kahan, J.P.

Abstract

Item does not contain fulltext, PURPOSE: Most patients with colorectal liver metastases present to general surgeons and oncologists without a specialist interest in their management. Since treatment strategy is frequently dependent on the response to earlier treatments, our aim was to create a therapeutic decision model identifying appropriate procedure sequences. METHODS: We used the RAND Corporation/University of California, Los Angeles Appropriateness Method (RAM) assessing strategies of resection, local ablation and chemotherapy. After a comprehensive literature review, an expert panel rated appropriateness of each treatment option for a total of 1,872 ratings decisions in 252 cases. A decision model was constructed, consensus measured and results validated using 48 virtual cases, and 34 real cases with known outcomes. RESULTS: Consensus was achieved with overall agreement rates of 93.4 to 99.1%. Absolute resection contraindications included unresectable extrahepatic disease, more than 70% liver involvement, liver failure, and being surgically unfit. Factors not influencing treatment strategy were age, primary tumor stage, timing of metastases detection, past blood transfusion, liver resection type, pre-resection carcinoembryonic antigen (CEA), and previous hepatectomy. Immediate resection was appropriate with adequate radiologically-defined resection margins and no portal adenopathy; other factors included presence of < or = 4 or > 4 metastases and unilobar or bilobar involvement. Resection was appropriate postchemotherapy, independent of tumor response in the case of < or = 4 metastases and unilobar liver involvement. Resection was appropriate only for > 4 metastases or bilobar liver involvement, after tumor shrinkage with chemotherapy. When possible, resection was preferred to local ablation. CONCLUSION: The results were incorporated into a decision matrix, creating a computer program (OncoSurge). This model identifies individual patient resectability, recommending optimal treatment strateg

Published
2005

32. Foreword

Author

Gaudiot, J.-L., primary, Patt, Y., additional, and Skadon, K., additional

Published
2006
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38. Phase II trial of hepatic arterial infusion of fluorouracil and recombinant human interferon alfa-2b for liver metastases of colorectal cancer refractory to systemic fluorouracil and leucovorin.

Author

Patt, Y Z, primary, Hoque, A, additional, Lozano, R, additional, Pozdur, R, additional, Chase, J, additional, Carrasco, H, additional, Chuang, V, additional, Delpassand, E S, additional, Ellis, L, additional, Curley, S, additional, Roh, M, additional, and Jones, D V, additional

Published
1997
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