<p>This dissertation presents a new architecture model named Weld for horizontal architectures such as VLIW and EPIC. Weld integrates speculative multithreading support into a VLIW/EPIC processor to hide run-time latency effects that cannot be determined by the compiler. Also, it proposes a hardware technique called operation welding that merges operations from different threads to utilize the hardware resources more efficiently. Hardware contexts such as program counters and the fetch units are duplicated to support multithreading. Also, a dual-thread Weld architecture is isolated and analyzed for cost/performance purposes within the general Weld architecture. The dual-thread Weld model supports one main thread and one speculative thread running simultaneously in a VLIW/EPIC processor with a register file and a fetch unit per thread. The cost/performance impact of the dual-thread Weld model, which includes analysis of migrating the disambiguation hardware to the compiler and the sensitivity analysis to the variation of branch misprediction and second-level cache miss penalties, is examined further. <P>
| Identifer | oai:union.ndltd.org:NCSU/oai:NCSU:etd-20010904-132307 |
| Date | 04 September 2001 |
| Creators | Ozer, Emre |
| Contributors | Thomas M. Conte, Edward W. Davis, Wentai Liu, Eric Rotenberg |
| Publisher | NCSU |
| Source Sets | North Carolina State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://www.lib.ncsu.edu/theses/available/etd-20010904-132307 |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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