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Chained in-order/out-of-order doublecore architecture

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10.1109/CAHPC.2005.18
 
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hdl:2117/112370

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Pericàs Gleim, Miquel
Cristal Kestelman, AdriánMés informacióMés informació
González García, Rubén
Jiménez González, DanielMés informacióMés informacióMés informació
Valero Cortés, MateoMés informacióMés informacióMés informació
Document typeConference report
Defense date2005
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Complexity is one of the most important problems facing microarchitects. It is exacerbated by the application of optimizations, by scaling to higher issue widths and, in general, by increasing the size of microprocessor structures. This paper presents a new microarchitecture, the chained in-order/out-of-order doublecore architecture (CIO2), designed to attack the problems of complexity and energy. The CIO2 architecture reorganizes the microarchitecture using the concepts of a centralized register file and the future file. The resulting architecture decouples that program state from the execution units. The simplicity of the architecture enables the implementation of three optimizations with little effort: register file banking, writeback filtering and instruction pre-execution. These optimizations allow a reduction of up to 75% in register file energy consumption. Instruction pre-execution further allows around 40% of all integer instructions to execute in the in-order front-end, considerably reducing the activity of the power-hungry issue queues in the out-of-order back-end. Moreover, these improvements are achieved with a negligible performance loss.
CitationPericàs, M., Cristal, A., González, R., Jiménez, D., Valero, M. Chained in-order/out-of-order doublecore architecture. A: International Symposium on Computer Architecture and High Performance Computing. "17th International Symposium on Computer Architecture and High Performance Computing, SBAC-PAD 2005: 24-27 October 2005, Rio de Janeiro, RJ, Brazil: proceedings". Rio de Janeiro: Institute of Electrical and Electronics Engineers (IEEE), 2005, p. 209-216. 
URIhttp://hdl.handle.net/2117/112370
DOI10.1109/CAHPC.2005.18
ISBN0-7695-2446-X
Publisher versionhttp://ieeexplore.ieee.org/document/1592575/
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