Implementation of ATLAS I:
a Single-Chip ATM Switch with Backpressure
Georgios
Kornaros, Dionisios
Pnevmatikatos, Panagiota Vatsolaki, Georgios Kalokerinos,
Chara Xanthaki, Dimitrios Mavroidis, Dimitrios Serpanos, and
Manolis Katevenis
Institute of Computer
Science (ICS)
Foundation for Research and Technology -- Hellas (FORTH)
Science and Technology Park of Crete, P.O.Box 1385, Heraklion, Crete, GR 711 10 Greece
Foundation for Research and Technology -- Hellas (FORTH)
Science and Technology Park of Crete, P.O.Box 1385, Heraklion, Crete, GR 711 10 Greece
most authors are or were also with the
Department of Computer Science, University of Crete, Greece.
Department of Computer Science, University of Crete, Greece.
Proceedings of the
IEEE Hot Interconnects VI Symposium,
Stanford University, California USA, 13-15 August 1998
© Copyright 1998 IEEE
Stanford University, California USA, 13-15 August 1998
© Copyright 1998 IEEE
ABSTRACT:
ATLAS I is a single-chip ATM switch with 10 Gb/s throughput, a shared
buffer, 3 priority levels, multicasting, load monitoring, and optional
credit-based flow control. This 6-million-transistor 0.35-micron CMOS
chip is about to be taped out for fabrication. We present here the implementation
of ATLAS I; we report on the design complexity and silicon cost of the
chip and of the individual functions that it supports. Based on these
metrics, we evaluate the architecture of the switch. The evaluation points
in the direction of increasing the cell buffer size and dropping VP/VC
translation, while other possible modifications are also discussed. The
cost of credit support (10% in chip area and 4% in chip power) is minuscule
compared to its benefits, i.e. compared to what alternative architectures
have to pay in order to achieve comparable performance levels.
KEYWORDS: single-chip ATM switch, general-purpose building block for universal networking, credit-based flow control, backpressure, VLSI switch implementation cost & evaluation.
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Last updated: July 1998, by M.
Katevenis.
© Copyright 1998 IEEE.
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