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Sun 23 Jun 2019 16:50 - 17:14 at 106A - Mechanics / Message Passing

Ruby is a popular object-oriented programming language, and the performance of the Ruby garbage collector (GC) directly affects the execution time of Ruby programs.
Ruby 2.0 and earlier versions employed an inefficient non-generational conservative mark-and-sweep GC.
To improve this and make it a generational collector, it is necessary to introduce write barriers (WBs), but this requires huge modification to existing source code, including third-party C-extensions.
To avoid the need for adding WBs around legacy code, we invented a new concept called ``WB-unprotected objects'', which indicates to the GC to treat such objects more conservatively.
By leveraging this design, we were able to improve the performance of Ruby 2.1 with a generational GC and of Ruby 2.2 with an incremental GC while preserving compatibility with existing C-extensions.
Another significant advantage of this approach is that WBs can be added gradually, which reduces the difficulties associated with updating existing code.

Koichi Sasada is a programmer, mainly developing Ruby interpreter (CRuby/MRI). He received Ph.D (Information Science and Technology) from the University of Tokyo, 2007. He became a faculty of University of Tokyo (Assistant associate 2006-2008, Assistant professor 2008-2012). After the 13 years life in university, he had joined a member of Matz’s team in Heroku, Inc. Now he is a member of Cookpad Inc (engineer). He is also a director of Ruby Association.

Sun 23 Jun

Displayed time zone: Tijuana, Baja California change

16:00 - 17:15
Mechanics / Message PassingISMM 2019 at 106A
snmalloc: A Message Passing Allocator
ISMM 2019
Paul Lietar , Theodore Butler Drexel University, USA, Sylvan Clebsch Imperial College London, Sophia Drossopoulou Imperial College London, Juliana Franco Microsoft Research, Cambridge, Matthew Parkinson Microsoft Research, UK, Alex Shamis Microsoft Research / Imperial College London, Christoph M. Wintersteiger Microsoft Research, UK, David Chisnall University of Cambridge
Design and Analysis of Field-Logging Write Barriers
ISMM 2019
Steve Blackburn Australian National University
Gradual Write-Barrier Insertion into a Ruby Interpreter
ISMM 2019
Koichi Sasada Cookpad, Japan
Link to publication DOI
Day closing
Final Remarks
ISMM 2019
Harry Xu University of California, Los Angeles (UCLA), Jeremy Singer University of Glasgow