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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Semeraro, G. Albonesi, D.H. Magklis, G. Scott, M.L. Dropsho, S.G. Dwarkadas, S. |
| Copyright Year | 2004 |
| Description | Author affiliation: Dept. of Comput. Eng., Rochester Inst. of Technol., USA (Semeraro, G.) |
| Abstract | We analyze an Alpha 21264-like globally-asynchronous, locally-synchronous (GALS) processor organized as multiple clock domain (MCD) microarchitecture and identify the architectural features of the processor that influence the limited performance degradation measured. We show that the out-of-order superscalar execution features of a processor, which allow traditional instruction execution latency to be hidden, are the same features that reduce the performance degradation impact of the synchronization costs of an MCD processor. In the case of our Alpha 21264-like processor, up to 94% of the MCD synchronization delays are hidden and do not impact overall performance. In addition, we show that by adding out-of-order superscalar execution capabilities to a simpler microarchitecture, such as an Intel StrongARM-like processor, as much as 62% of the performance degradation caused by synchronization delays can be eliminated. |
| Sponsorship | IEEE Comput. Soc. Tech. Committee on VLSI Found. for Res. and Technol. - Hellas European Commission - ACiD-WG Fulcrum Microsystems Inc. Intel Philips Sun Microsystems Inc. Xilinx |
| Starting Page | 159 |
| Ending Page | 169 |
| File Size | 1266671 |
| Page Count | 11 |
| File Format | |
| ISBN | 0769521339 |
| ISSN | 15228681 |
| DOI | 10.1109/ASYNC.2004.1299297 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-04-19 |
| Publisher Place | Greece |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Delay Microarchitecture Clocks Frequency synchronization Degradation Costs Voltage Pipelines Performance analysis Timing |
| Content Type | Text |
| Resource Type | Article |
| Subject | Engineering |
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