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POPL
2016
ACM

Taming release-acquire consistency

7 years 11 months ago
Taming release-acquire consistency
We introduce a strengthening of the release-acquire fragment of the C11 memory model that (i) forbids dubious behaviors that are not observed in any implementation; (ii) supports fence instructions that restore sequential consistency; and (iii) admits an equivalent intuitive operational semantics based on point-to-point communication. This strengthening has no additional implementation cost: it allows the same local optimizations as C11 release and acquire accesses, and has exactly the same compilation schemes to the x86TSO and Power architectures. In fact, the compilation to Power is complete with respect to a recent axiomatic model of Power; that is, the compiled program exhibits exactly the same behaviors as the source one. Moreover, we provide criteria for placing enough fence instructions to ensure sequential consistency, and apply them to an efficient RCU implementation.
Ori Lahav, Nick Giannarakis, Viktor Vafeiadis
Added 09 Apr 2016
Updated 09 Apr 2016
Type Journal
Year 2016
Where POPL
Authors Ori Lahav, Nick Giannarakis, Viktor Vafeiadis
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