Modular Relaxed Dependencies in Weak Memory Concurrency

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• Marco Paviotti
• Thursday 05 December 2019, 14:00-15:00
• Computer Laboratory, Room FW11.

If you have a question about this talk, please contact Jean Pichon-Pharabod.

We present a denotational semantics for weak memory concurrency that avoids thin-air reads, provides data-race free programs with sequentially consistent semantics (DRF-SC), and supports a compositional refinement relation for validating optimisations. We then use this semantics to fix the C+ memory model, which we call RD-C11 (Relaxed Dependencies C11 ). We show RD-C11 is the first C+ model the avoids thin-air reads that is aligned with the axiomatic-style specification of the ISO standard, provides the DRF -SC property, is efficiently implementable over hardware architectures and that is tested via a simulator over a battery of litmus tests.

This talk is part of the Logic and Semantics Seminar (Computer Laboratory) series.

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