| Presentation | 2008-05-13 Speculation scheme that continues executing mispredicted instructions Takanobu KITA, Ryota SHIOYA, Eiji IRIE, Masahiro GOSHIMA, Shuichi SAKAI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Modern processors are acquiring deeper pipelines as their clock frequencies grow higher, leading to large misprediction penalties. Not all instructions flushed on misprediction, however, are wrongly executed ; there are instructions independent of control flow. Not flushing such instructions and leaving them for continued execution will reduce misprediction penalty. This paper proposes a speculation scheme which continues execution of instructions on misprediction instead of flushing them. The results of instructions independent of control flow may be used for branch prediction and value prediction, and help execution of correct path. The evaluation showed that with an addition of small amount of Hardware, the proposed scheme will increase IPCs by average of 3.8% (12SPECint2000, SPECint2006 and MediaBench. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | branch prediction / misprediction |
| Paper # | ICD2008-18 |
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| Conference Information | |
| Committee | ICD |
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| Conference Date | 2008/5/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Integrated Circuits and Devices (ICD) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Speculation scheme that continues executing mispredicted instructions |
| Sub Title (in English) | |
| Keyword(1) | branch prediction |
| Keyword(2) | misprediction |
| 1st Author's Name | Takanobu KITA |
| 1st Author's Affiliation | S. Sakai and M. Goshima Lab., Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo() |
| 2nd Author's Name | Ryota SHIOYA |
| 2nd Author's Affiliation | S. Sakai and M. Goshima Lab., Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo |
| 3rd Author's Name | Eiji IRIE |
| 3rd Author's Affiliation | S. Sakai and M. Goshima Lab., Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo |
| 4th Author's Name | Masahiro GOSHIMA |
| 4th Author's Affiliation | S. Sakai and M. Goshima Lab., Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo |
| 5th Author's Name | Shuichi SAKAI |
| 5th Author's Affiliation | S. Sakai and M. Goshima Lab., Department of Information and Communication Engineering, Graduate School of Information Science and Technology, The University of Tokyo |
| Date | 2008-05-13 |
| Paper # | ICD2008-18 |
| Volume (vol) | vol.108 |
| Number (no) | 28 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |