DLS 2019
Sun 20 - Fri 25 October 2019 Athens, Greece
co-located with SPLASH 2019
Sun 20 Oct 2019 16:00 - 16:30 at Room 2A - Beyond the Language

To keep applications highly responsive, garbage collectors (GCs) try to minimize interruptions of the application threads. While pauses due to non moving GCs can be drastically reduced through concurrent or incremental strategies, compaction pauses remain a big problem.

A strategy to decrease stop the world compaction pauses is to compact subsets of the heap at any one time. But this only reduces the time spent in moving compacted objects, not the time spent updating all references to those objects, which may be significant in large heaps. In this paper, we propose to only move compacted objects during the compaction pause, replacing moved objects by low-overhead forwarding objects. References to compacted objects are lazily updated while the application is running and during the next GC marking phase, outside of the compaction pause.

We evaluate our technique on a suite of high workload (2 to 14Gb) benchmarks built from a real industrial application. Results show that not updating pointers during the compaction pause decreases the median pause up to 31% and the longest pause up to 71% on these benchmarks, while the forwarding objects slow down execution time without GC by no more than 1%.

This program is tentative and subject to change.

Sun 20 Oct

16:00 - 17:30: DLS 2019 - Beyond the Language at Room 2A
dls-201916:00 - 16:30
Clément BéraGoogle, Aarhus, Eliot MirandaCadence Design Systems, Elisa Gonzalez BoixVrije Universiteit Brussel, Belgium
dls-201916:30 - 17:00
Thomas DupriezUniversité Lille, CNRS, Centrale Lille, Inria, UMR 9189 - CRIStAL, Guillermo PolitoUniv. Lille, CNRS, Centrale Lille, Inria, UMR 9189 - CRIStAL - Centre de Recherche en Informatique Signal et Automatique de Lille, Steven CostiouUniversity of Brest, Vincent AranegaUniversité Lille, CNRS, Centrale Lille, Inria, UMR 9189 - CRIStAL, Stéphane Ducasse INRIA Lille
dls-201917:00 - 17:30
Marcel WeiherHasso-Plattner-Institut (HPI), Germany, Robert HirschfeldHasso-Plattner-Institut (HPI), Germany