Mark-Scavenge: Waiting for Trash to Take Itself Out

This repository contains MS-ZGC, an implementation of mark-scavenge, presented in the paper Mark-Scavenge: Waiting for Trash to Take Itself Out during OOPSLA'24.

Comparing patches

mark-scavenge contains the main contribution.

• Mark-scavenge patch ... or git diff jdk mark-scavenge

• Livemap fix for mark-scavenge patch ... or git diff mark-scavenge mark-scavenge-livemap-fix

Notes on building

The binaries used in the paper was built with the following configuration bash configure --with-boot-jdk=/home/user/jdk-21 --with-native-debug-symbols=internal --disable-warnings-as-errors --with-extra-cxxflags=-std=gnu++17. Note that only Linux/x64 has been tested, so your milage may vary on other platforms.

JDK 21 (for boot image) can be downloaded from https://jdk.java.net/archive/.

Notes on running

To run MS-ZGC, build the source from branch mark-scavenge and use -XX:+UseZGC -XX:+ZGenerational.

Other GCs that is not MS-ZGC should be run using a build from the branch jdk. In the paper we have only evaluated ZGC generational (default mode is non-generational ZGC). To run generational ZGC use -XX:+UseZGC -XX:+ZGenerational.