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Slipstream processors: improving both performance and fault tolerance
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| Venue: | In Proceedings of the ninth international conference on Architectural |
| Citations: | 187 - 6 self |
BibTeX
@INPROCEEDINGS{Sundaramoorthy_slipstreamprocessors:,
author = {Karthik Sundaramoorthy and Zach Purser and Eric Rotenberg},
title = {Slipstream processors: improving both performance and fault tolerance},
booktitle = {In Proceedings of the ninth international conference on Architectural},
year = {},
pages = {257--268},
publisher = {ACM Press}
}
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Abstract
Processors execute the full dynamic instruction stream to arrive at the final output of a program, yet there exist shorter instruction streams that produce the same overall effect. We propose creating a shorter but otherwise equivalent version of the original program by removing ineffectual computation and computation related to highly-predictable control flow. The shortened program is run concurrently with the full program on a chip multiprocessor or simultaneous multithreaded processor, with two key advantages: 1) Improved single-program performance. The shorter program speculatively runs ahead of the full program and supplies the full program with control and data flow outcomes. The full program executes efficiently due to the communicated outcomes, at the same time validating the speculative, shorter program. The two programs combined run faster than the original program alone. Detailed simulations of an example implementation show an average improvement of 7 % for the SPEC95 integer benchmarks. 2) Fault tolerance. The shorter program is a subset of the full program and this partial-redundancy is transparently leveraged for detecting and recovering from transient hardware faults. 1.
Keyphrases
full program fault tolerance slipstream processor original program full dynamic instruction stream equivalent version shortened program detailed simulation instruction stream shorter program example implementation chip multiprocessor final output highly-predictable control flow single-program performance average improvement data flow key advantage overall effect transient hardware fault spec95 integer benchmark ineffectual computation
