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2009
ACM

Transactional memory with strong atomicity using off-the-shelf memory protection hardware

11 years 3 months ago
Transactional memory with strong atomicity using off-the-shelf memory protection hardware
This paper introduces a new way to provide strong atomicity in an implementation of transactional memory. Strong atomicity lets us offer clear semantics to programs, even if they access the same locations inside and outside transactions. It also avoids differences between hardware-implemented transactions and softwareimplemented ones. Our approach is to use off-the-shelf page-level memory protection hardware to detect conflicts between normal memory accesses and transactional ones. This page-level mechanism ensures correctness but gives poor performance because of the costs of manipulating memory protection settings and receiving notifications of access violations. However, in practice, we show how a combination of careful object placement and dynamic code update allows us to eliminate almost all of the protection changes. Existing implementations of strong atomicity in software rely on detecting conflicts by conservatively treating some non-transactional accesses as short transaction...
Martín Abadi, Tim Harris, Mojtaba Mehrara
Added 25 Nov 2009
Updated 25 Nov 2009
Type Conference
Year 2009
Where PPOPP
Authors Martín Abadi, Tim Harris, Mojtaba Mehrara
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