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Globally Wireless Locally Wired (GloWiLoW): A clock distribution network for many-core systems

Globally Wireless Locally Wired (GloWiLoW): A clock distribution network for many-core systems
Globally Wireless Locally Wired (GloWiLoW): A clock distribution network for many-core systems

Modern high-performance systems are now facing critical issues on delivering power-efficient and globally interconnected clock networks. Conventional metal-based interconnect has gradually reached its bottleneck with the technology scaling which limits system performance as the interconnect delay has already overweighed circuit gate delay. A typical clock distribution network (CDN) might consume up to 50% of the total chip power and could generate large phase delay and clock uncertainties due to its RC characteristic and unbalanced load. This paper proposes a novel hybrid wire-wireless CDN, which improves the performance of on-chip clock distribution significantly using embedded wireless clock transmitter and receiver fabrics. In particular, On-Off-Keying (OOK) transceivers are implemented for overall system simplicity and has achieved significant power-efficiency. Results indicate that the total propagation delay can be reduced to 39.4ps, which is 57 times lower than the conventional H-tree. Besides, the system clock skew can be predictable and limited only by the displacement of clock receivers. Less than 26.9ps of clock skew (6.7% of a clock period at 2.5GHz) could be found within the proposed CDN and hence, shows the promising potential of future high-performance on-chip clock distribution.

Institute of Electrical and Electronics Engineers Inc.
Ding, Qian
c7228f74-158a-44b9-b875-3096d24258e8
Fletcher, Benjamin J.
b9ee2f3f-f125-47df-a73e-e61c0404d4c9
Mak, Terrence
0f90ac88-f035-4f92-a62a-7eb92406ea53
Ding, Qian
c7228f74-158a-44b9-b875-3096d24258e8
Fletcher, Benjamin J.
b9ee2f3f-f125-47df-a73e-e61c0404d4c9
Mak, Terrence
0f90ac88-f035-4f92-a62a-7eb92406ea53

Ding, Qian, Fletcher, Benjamin J. and Mak, Terrence (2018) Globally Wireless Locally Wired (GloWiLoW): A clock distribution network for many-core systems. In 2018 IEEE International Symposium on Circuits and Systems, ISCAS 2018 - Proceedings. vol. 2018-May, Institute of Electrical and Electronics Engineers Inc.. (doi:10.1109/ISCAS.2018.8351041).

Record type: Conference or Workshop Item (Paper)

Abstract

Modern high-performance systems are now facing critical issues on delivering power-efficient and globally interconnected clock networks. Conventional metal-based interconnect has gradually reached its bottleneck with the technology scaling which limits system performance as the interconnect delay has already overweighed circuit gate delay. A typical clock distribution network (CDN) might consume up to 50% of the total chip power and could generate large phase delay and clock uncertainties due to its RC characteristic and unbalanced load. This paper proposes a novel hybrid wire-wireless CDN, which improves the performance of on-chip clock distribution significantly using embedded wireless clock transmitter and receiver fabrics. In particular, On-Off-Keying (OOK) transceivers are implemented for overall system simplicity and has achieved significant power-efficiency. Results indicate that the total propagation delay can be reduced to 39.4ps, which is 57 times lower than the conventional H-tree. Besides, the system clock skew can be predictable and limited only by the displacement of clock receivers. Less than 26.9ps of clock skew (6.7% of a clock period at 2.5GHz) could be found within the proposed CDN and hence, shows the promising potential of future high-performance on-chip clock distribution.

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More information

Published date: 26 April 2018
Venue - Dates: 2018 IEEE International Symposium on Circuits and Systems, Italy, 2018-05-27 - 2018-05-30

Identifiers

Local EPrints ID: 426997
URI: http://eprints.soton.ac.uk/id/eprint/426997
PURE UUID: f063f2d5-62d6-4cc5-87f5-6bbe6abf4f37
ORCID for Benjamin J. Fletcher: ORCID iD orcid.org/0000-0002-4957-1934

Catalogue record

Date deposited: 20 Dec 2018 17:30
Last modified: 07 Oct 2020 02:14

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Contributors

Author: Qian Ding
Author: Benjamin J. Fletcher ORCID iD
Author: Terrence Mak

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