Speculative pre-execution assisted by compiler (SPEAR)

Won W. Ro, Jean Luc Gaudiot

Research output: Contribution to journalArticle

2 Citations (Scopus)


Speculative pre-execution achieves efficient data prefetching by running additional prefetching threads on spare hardware contexts. Various implementations for speculative pre-execution have been proposed, including compiler-based static approaches and hardware-based dynamic approaches. A static approach defines the p-thread at compile time and executes it as a stand-alone running thread. Therefore, it cannot efficiently take dynamic events into account and requires a higher fetch bandwidth. Conversely, a hardware approach is, by essence, able to dynamically make use run-time information. However, it requires more complex hardware and also lacks global information on data and control flow. This paper proposes Speculative Pre-Execution Assisted by compileR (SPEAR), a pre-execution model which is a hybrid of the two approaches. It relies on a post-compiler to extract the p-thread code from program binaries and uses custom- designed hardware to execute the p-thread.

Original languageEnglish
Pages (from-to)1076-1089
Number of pages14
JournalJournal of Parallel and Distributed Computing
Issue number8
Publication statusPublished - 2006 Aug 1

All Science Journal Classification (ASJC) codes

  • Software
  • Theoretical Computer Science
  • Hardware and Architecture
  • Computer Networks and Communications
  • Artificial Intelligence

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