ECOOP 2020
Sun 15 - Tue 17 November 2020 Online Conference
co-located with SPLASH 2020
Mon 16 Nov 2020 08:00 - 08:20 at SPLASH-I - M-1 Chair(s): John Boyland, Peter Thiemann
Mon 16 Nov 2020 20:00 - 20:20 at SPLASH-I - M-1 Chair(s): Yu David Liu, Hidehiko Masuhara

The vast divide between the speed of CPU and RAM means that effective use of CPU caches is often a prerequisite for high performance on modern architectures. Hence, developers need to consider how to place data in memory so as to exploit spatial locality and achieve high memory bandwidth. Such manual memory optimisations are common in unmanaged languages (e.g. C, C++), but they sacrifice readability, maintainability, memory safety, and object abstraction. In managed languages, such as Java and C#, where the runtime abstracts away the memory from the developer, such optimisations are almost impossible.

We present a language extension called SHAPES, which aims to offer developers more fine-grained control over the placement of data, without sacrificing memory safety or object abstraction. In SHAPES, programmers group related objects into pools, and specify how objects are laid out in these pools. Classes and types are annotated by pool parameters, which allow placement aspects to be changed orthogonally to the code that operates on the objects in the pool. These design decisions disentangle business logic and memory concerns.

We give a formal model of SHAPES, present its type and memory safety model, and present its translation to a low-level language. We argue why we expect this translation to be efficient in terms of runtime representation of objects and access to their fields. We argue that SHAPES can be incorporated into existing managed and unmanaged language runtimes and fit well with garbage collection.

Mon 16 Nov

Displayed time zone: Central Time (US & Canada) change

07:00 - 08:20
M-1Research Papers at SPLASH-I +12h
Chair(s): John Boyland Univeristy of Wisconsin, Milwaukee, Peter Thiemann University of Freiburg, Germany
07:00
20m
Talk
A Semantics for the Essence of React
Research Papers
Magnus Madsen Aarhus University, Ondřej Lhoták University of Waterloo, Frank Tip Northeastern University
Link to publication DOI Media Attached
07:20
20m
Talk
Reconciling Event Structures with Modern Multiprocessors
Research Papers
Evgenii Moiseenko St. Petersburg University / JetBrains Research, Anton Podkopaev NRU HSE, JetBrains Research, Ori Lahav Tel Aviv University, Orestis Melkonian Utrecht University, Viktor Vafeiadis MPI-SWS
Link to publication DOI Media Attached
07:40
20m
Talk
A Framework for Resource Dependent EDSLs in a Dependently Typed Language
Research Papers
Jan de Muijnck-Hughes University of Glasgow, Wim Vanderbauwhede University of Glasgow, Edwin Brady University of St. Andrews
Link to publication DOI Media Attached
08:00
20m
Talk
Reshape your layouts, not your programs: A safe language extension for better cache localitySCICO Journal-First
Research Papers
Alexandros Tasos Imperial College London, Juliana Franco , Sophia Drossopoulou Imperial College London, Tobias Wrigstad Uppsala University, Sweden, Susan Eisenbach Imperial College London
Link to publication DOI Media Attached
19:00 - 20:20
M-1Research Papers at SPLASH-I
Chair(s): Yu David Liu State University of New York (SUNY) Binghamton, Hidehiko Masuhara Tokyo Institute of Technology
19:00
20m
Talk
A Semantics for the Essence of React
Research Papers
Magnus Madsen Aarhus University, Ondřej Lhoták University of Waterloo, Frank Tip Northeastern University
Link to publication DOI Media Attached
19:20
20m
Talk
Reconciling Event Structures with Modern Multiprocessors
Research Papers
Evgenii Moiseenko St. Petersburg University / JetBrains Research, Anton Podkopaev NRU HSE, JetBrains Research, Ori Lahav Tel Aviv University, Orestis Melkonian Utrecht University, Viktor Vafeiadis MPI-SWS
Link to publication DOI Media Attached
19:40
20m
Talk
A Framework for Resource Dependent EDSLs in a Dependently Typed Language
Research Papers
Jan de Muijnck-Hughes University of Glasgow, Wim Vanderbauwhede University of Glasgow, Edwin Brady University of St. Andrews
Link to publication DOI Media Attached
20:00
20m
Talk
Reshape your layouts, not your programs: A safe language extension for better cache localitySCICO Journal-First
Research Papers
Alexandros Tasos Imperial College London, Juliana Franco , Sophia Drossopoulou Imperial College London, Tobias Wrigstad Uppsala University, Sweden, Susan Eisenbach Imperial College London
Link to publication DOI Media Attached