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- Björk, Magnus, 1977, et al.
(författare)
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Exposed Datapath for Efficient Computing
- 2006
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We introduce FlexCore, which is the first exemplar of a processor based on the FlexSoC processor paradigm. TheFlexCore utilizes an exposed datapath for increased performance. Microbenchmarks yield a performance boost of a factor of two over a traditional five-stage pipeline with the same functional units as the FlexCore.We describe our approach to compiling for the FlexCore.A flexible interconnect allows the FlexCore datapath to bedynamically reconfigured as a consequence of code generation. Additionally, specialized functional units may be introduced and utilized within the same architecture and compilation framework. The exposed datapath requires a wide control word. The conducted evaluation of two micro benchmarks confirms that this increases the instruction bandwidth and memory footprint. This calls for an efficient instruction decoding as proposed in the FlexSoC paradigm.
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| 3. |
- Hughes, John, 1958, et al.
(författare)
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FlexSoC: Combining Flexibility and Efficiency in SoC Designs
- 2003
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Ingår i: Proceedings of 21st Norchip Conference. ; Riga, Latvia, s. 52-55
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Konferensbidrag (refereegranskat)abstract
- The FlexSoC project aims at developing a designframework that makes it possible to combine the computational speed and energy-efficiency of specialized hardware accelerators with the flexibility of programmable processors. FlexSoC approaches this problem by defining auniform programming interface across the heterogeneousstructure of processing resources. This paper justifies ourapproach and also discusses the central research issueswe will focus on in the areas of VLSI design, computerarchitecture, and programming and verification.
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| 5. |
- Thuresson, Martin, 1977, et al.
(författare)
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FlexCore: Utilizing Exposed Datapath Control for Efficient Computing
- 2009
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Ingår i: Journal of Signal Processing Systems. - : Springer Science and Business Media LLC. - 1939-8115 .- 1939-8018. ; 57:1, s. 5-19
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Tidskriftsartikel (refereegranskat)abstract
- We introduce FlexCore, the first exemplar of an architecture based on the FlexSoC framework. Comprising the same datapath units found in a conventional five-stage pipeline, the FlexCore has an exposed datapath control and a flexible interconnect to allow the datapath to be dynamically reconfigured as a consequence of code generation. Additionally, the FlexCore allows specialized datapath units to be inserted and utilized within the same architecture and compilation framework.This study shows that, in comparison to a conventional five-stage general-purpose processor, the FlexCore is up to 40\% more efficient in terms of cycle count on a set of benchmarks from the embedded application domain. We show that both the fine-grained control and the flexible interconnect contribute to the speedup. Furthermore, our synthesized, placed and routed FlexCore offers savings both in energy and execution time.The exposed FlexCore datapath requires a wide control word. The conducted evaluation confirms that this increases the instruction bandwidth and memory footprint. This calls for efficient instruction decoding as proposed in the FlexSoC framework.
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| 6. |
- Andersson, Daniel, 1977, et al.
(författare)
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Accounting for the Skin Effect during Repeater Insertion
- 2005
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Ingår i: 2005 ACM Great Lakessymposium on VLSI, GLSVLSI'05; Chicago, IL; United States; 17 April 2005 through 19 April 2005. - New York, NY, USA : ACM. ; , s. 32-37
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Konferensbidrag (refereegranskat)abstract
- Since the skin effect will increase the propagation delay in an interconnect, it will also affect how to optimally select the number and size of the buffers. Failing to include the skin effect during buffer design may result in as much as 35% extra delay compared to the optimal repeater chain. We present a new method with closed-form expressions for repeater insertion where we take into account the skin effect and also the relationship between interconnect resistance, capacitance and inductance that are determined from the geometrical parameters. We also investigate the skin-effect influence on power dissipation for an optimally designed repeater chain, and find that the increase is at most 10% of the dynamic power dissipation.
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