Sentinel Scheduling for VLIW and Superscalar Processors

Scott A. Mahlke, William Y. Chen, Wen Mei W. Hwu, B. Ramakrishna Rau, Michael S. Schlansker

Research output: Contribution to journalArticlepeer-review


Speculative execution is an important source of parallelism for VLIW and superscalar processors. A serious challenge with compiler-controlled speculative execution is to accurately detect and report all program execution errors at the time of occurrence. In this paper, a set of architectural features and compile-time scheduling support referred to as sentinel scheduling is introduced. Sentinel scheduling provides an effective framework for compiler-controlled speculative execution that accurately detects and reports all exceptions. Sentinel scheduling also supports speculative execution of store instructions by providing a store buffer which allows probationary entries. Experimental results show that sentinel scheduling is highly effective for a wide range of VLIW and superscalar processors.

Original languageEnglish (US)
Pages (from-to)238-247
Number of pages10
JournalACM SIGPLAN Notices
Issue number9
StatePublished - Jan 9 1992

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design


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