69documents trouvés
Implementing snoop-coherence protocol for future SMP architectures
W.HLAYHEL, J.H.COLLET, L.FESQUET
IRIT-UPS, PH
Manifestation avec acte : 5th International Euro-Par Conference (Euro-Par'99), Toulouse (France), 31 Août - 3 Septembre 1999 , N° 99362
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35119Optical versus electronic bus for address-transactions in future SMP architectures
W.HLAYHEL, D.LITAIZE, L.FESQUET, J.H.COLLET
IRIT-UPS, PH
Manifestation avec acte : International Conference on Parallel Architectures and Compilation Techniques (PACT'98), Paris (France), 12-18 Octobre 1998, pp.22-29 , N° 98307
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31579A systolic approach to ATM commutation in the Gigabit networks
Y.SAOUTER, D.LITAIZE, J.H.COLLET
IRIT-UPS, PH
Manifestation avec acte : 6th IFIP Workshop on Performance Modelling and Evaluation of ATM Networks (IFIP ATM'98), Ilkley (GB), 20-22 Juillet 1998, 9p. , N° 98308
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31814Low latency asynchronous optical bus for distributed multiprocessor systems
L.FESQUET, J.H.COLLET, R.BUHLEIER
PH
Ouvrage (contribution) : Optical interconnections and parallel processing: trends at the interface, Kluwer Academic Publishers, Eds. P.Berthomé, A.Ferreira, N°ISBN 0-7923-4817-6, Janvier 1998 , N° 97037
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Abstract
We present an investigation on how to reduce the internode communication latency in distributed multiprocessor systems. The strategy consists of replacing the "store and forward" mechanism that is usually carried out on each electronic node by a free diffusion of optical packets along an optical bus. No routing, no extraction of optical packets and no access arbitration into the bus are needed. Intermediate nodes between two processors engaged in a communication are optically transparent. These specifications considerably simplify the optoelectronic interface of the node and reduce the latency of communication. In the asynchronous operation mode that we consider, each node multiplexer inserts on the fly optical packets into the bus. The optical demultiplexer identifies the packet destination address before transmitting the data to the node electronics. The key point is to make the intranode latency shorter than the internode propagation time to attain a network latency close to ultimate limit imposed by the velocity of light. We discuss the utilization of all- optical logical gates and the specifications for the requested photonic devices.
Mots-Clés / Keywords
Latency of communication; Optical bus; Asynchronous time division multiplexing;
Picosecond photodiffraction in semiconductor multiquantum wells and microcavities
J.L.IEHL, R.GRAC, L.LE GRATIET, V.BARDINAL, R.BUHLEIER, C.FONTAINE, E.BEDEL-PEREIRA, M.PUGNET, J.H.COLLET
PH
Revue Scientifique : Annales des Télécommunications, Vol.52, N°11-12, pp.627-637, 1997 , N° 97569
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26475Low latency optical bus for distributed multiprocessor systems
L.FESQUET, J.H.COLLET
PH
Manifestation sans acte : International Workshop on New Technologies, Interconnects and Communications in Distributed and Parallel System, Toulouse (France), 16-17 Juin 1997, 4p. , N° 97555
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24806Comparison of the communication latency for an optical bus and for several 2D electronic network topologies
J.H.COLLET, L.FESQUET
PH
Manifestation avec acte : 11th International Parallel Processing Symposium. Workshop on Optics and Computer Science (WOCS'97), Genève (Suisse), 1-5 Avril 1997, 12p. , N° 97038
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Abstract
We study the reduction of the internode communication latency in distributed memory multiprocessor machines on the assumption of developing a new generation of optical busses. We consider quasi-transparent optical busses which conveys optical packets in the asynchronous mode. The critical property of these busses is that the intranode latency is small compared to the internode propagation time so that the propagation of packets along the bus is determined by the sole velocity of light in the fibers. For 2D networks, this is just the contrary: the electronic node processing time generally controls the propagation of messages. We show that the optical bus outdoes several 2D electronic topologies both for the shortness of the latency and for the magnitude of the bandwidth. We briefly summarize in the last section the physical implementation of the optical bus and the structure of the bus/node interface.
Subnanosecond reflectivity modulation kinetics in GaAs/GaAlAs microcavities
J.L.IEHL, R.GRAC, J.H.COLLET, M.PUGNET, V.BARDINAL, C.FONTAINE, R.LEGROS
PH
Revue Scientifique : Journal of Nonlinear Optical Physics and Materials, Vol.5, N°4, 1996 , N° 96265
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18779Subnanosecond density dynamics of the electron-hole plasma in GaAs/AlAs microcavities
J.L.IEHL, R.GRAC, J.H.COLLET, M.PUGNET, R.BUHLEIER, V.BARDINAL, C.FONTAINE, R.LEGROS
PH
Revue Scientifique : Physica B, Vol.222, pp.73-79, 1996 , N° 96523
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18830Four-wave mixing in bulk GaAs microcavities at room temperature
R.BUHLEIER, M.HUBNER, V.BARDINAL, J.KUHL, J.H.COLLET, C.FONTAINE
PH, Max
Revue Scientifique : Applied Physics Letters, Vol.69, N°15, pp.2240-2242, Octobre 1996 , N° 96270
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