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Design Space Exploration for Implementing a Software-Based Speculative Memory System

Design Space Exploration for Implementing a Software-Based Speculative Memory System

Kohei Fujisawa, Atsushi Nunome, Kiyoshi Shibayama, Hiroaki Hirata
Copyright: © 2018 |Volume: 6 |Issue: 2 |Pages: 13
ISSN: 2166-7160|EISSN: 2166-7179|EISBN13: 9781522546849|DOI: 10.4018/IJSI.2018040104
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MLA

Fujisawa, Kohei, et al. "Design Space Exploration for Implementing a Software-Based Speculative Memory System." IJSI vol.6, no.2 2018: pp.37-49. http://doi.org/10.4018/IJSI.2018040104

APA

Fujisawa, K., Nunome, A., Shibayama, K., & Hirata, H. (2018). Design Space Exploration for Implementing a Software-Based Speculative Memory System. International Journal of Software Innovation (IJSI), 6(2), 37-49. http://doi.org/10.4018/IJSI.2018040104

Chicago

Fujisawa, Kohei, et al. "Design Space Exploration for Implementing a Software-Based Speculative Memory System," International Journal of Software Innovation (IJSI) 6, no.2: 37-49. http://doi.org/10.4018/IJSI.2018040104

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Abstract

To enlarge the opportunities for parallelizing a sequentially coded program, the authors have previously proposed speculative memory (SM). With SM, they can start the parallel execution of a program by assuming that it does not violate the data dependencies in the program. When the SM system detects a violation, it recovers the computational state of the program and restarts the execution. In this article, the authors explore the design space for implementing a software-based SM system. They compared the possible choices in the following three viewpoints: (1) which waiting system of suspending or busy-waiting should be used, (2) when a speculative thread should be committed, and (3) which version of data a speculative thread should read. Consequently, the performance of the busy-waiting system which makes speculative threads commit early and read non-speculative values is better than that of others.

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