Blogs (9) >>
Sun 30 October - Fri 4 November 2016 Amsterdam, Netherlands
Wed 2 Nov 2016 11:45 - 12:10 at Matterhorn 2 - Semantics and Verification Chair(s): Jonathan Aldrich

Recent advances in networking hardware have led to a new generation of Remote Memory Access (RMA) networks in which processors from different machines can communicate directly, bypassing the operating system and allowing higher performance. Researchers and practitioners have proposed libraries and programming models for RMA to enable the development of applications running on these networks,

However, the memory models implied by these RMA libraries and languages are often loosely specified, poorly understood, and differ depending on the underlying network architecture and other factors. Hence, it is difficult to precisely reason about the semantics of RMA programs or how changes in the network architecture affect them.

We address this problem with the following contributions: (i) a \emph{coreRMA} language which serves as a common foundation, formalizing the essential characteristics of RMA programming; (ii) complete axiomatic semantics for that language;
(iii) integration of our semantics with an existing constraint solver, enabling us to exhaustively generate \emph{coreRMA} programs (litmus tests) up to a specified bound and check whether the tests satisfy their specification; and (iv) extensive validation of our semantics on real-world RMA systems.
We generated and ran $7441$ litmus tests using each of the low-level RMA network APIs: DMAPP, VPI Verbs, and Portals 4. Our results confirmed that our model successfully captures behaviors exhibited by these networks. Moreover, we found RMA programs that behave inconsistently with existing documentation, confirmed by network experts.

Our work provides an important step towards understanding existing RMA networks, thus influencing the design of future RMA interfaces and hardware.

Conference Day
Wed 2 Nov

Displayed time zone: Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna change

10:30 - 12:10
Semantics and VerificationOOPSLA at Matterhorn 2
Chair(s): Jonathan AldrichCarnegie Mellon University
Semantics-Based Program Verifiers for All LanguagesAECDistinguished Paper Award
Andrei StefanescuUniversity of Illinois at Urbana-Champaign, Daejun ParkUniversity of Illinois at Urbana-Champaign, Shijiao YuwenUniversity of Illinois at Urbana-Champaign, Yilong LiRuntime Verification, Inc., Grigore RoşuUniversity of Illinois at Urbana-Champaign
DOI Media Attached
Hoare-Style Specifications as Correctness Conditions for Non-linearizable Concurrent ObjectsAEC
Ilya SergeyUniversity College London, Aleksandar NanevskiIMDEA Software Institute, Anindya BanerjeeIMDEA Software Institute, Germán Andrés DelbiancoIMDEA Software Institute
DOI Pre-print Media Attached File Attached
An Operational Semantics for C/C++11 ConcurrencyAEC
Kyndylan NienhuisUniversity of Cambridge, Kayvan MemarianUniversity of Cambridge, Peter SewellUniversity of Cambridge
Modeling and Analysis of Remote Memory Access ProgrammingAECDistinguished Paper Award
Andrei Marian DanETH Zurich, Patrick LamUniversity of Waterloo, Canada, Torsten HoeflerETH Zurich, Martin VechevETH Zurich
DOI Pre-print Media Attached