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| Content Provider | ACM Digital Library |
|---|---|
| Author | Shen, John P. Collins, Jamison D. Tullsen, Dean M. Lavery, Dan Hughes, Christopher Wang, Hong Lee, Yong-Fong |
| Abstract | This paper explores Speculative Precomputation, a technique that uses idle thread context in a multithreaded architecture to improve performance of single-threaded applications. It attacks program stalls from data cache misses by pre-computing future memory accesses in available thread contexts, and prefetching these data. This technique is evaluated by simulating the performance of a research processor based on the Itaniumâ„¢ ISA supporting Simultaneous Multithreading. Two primary forms of Speculative Precomputation are evaluated. If only the non-speculative thread spawns speculative threads, performance gains of up to 30% are achieved when assuming ideal hardware. However, this speedup drops considerably with more realistic hardware assumptions. Permitting speculative threads to directly spawn additional speculative threads reduces the overhead associated with spawning threads and enables significantly more aggressive speculation, overcoming this limitation. Even with realistic costs for spawning threads, speedups as high as 169% are achieved, with an average speedup of 76%. |
| Starting Page | 14 |
| Ending Page | 25 |
| Page Count | 12 |
| File Format | |
| ISBN | 0769511627 |
| DOI | 10.1145/379240.379248 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2001-06-01 |
| Publisher Place | New York |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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