Optimized OpenJDK builds for riscv64 architecture!

Most popular ways of installing the JDK do not provide riscv64 builds. If they are provided (such as via debian or ubuntu), as of 2023, those are with the "Zero VM" which runs in interpreted mode. That mode offers terrible performance.

As of Java 19, the JIT compiler has been ported to risv64, providing significant performance boosts compared to the "Zero VM".

Project by Fizzed, Inc. (Follow on Twitter: @fizzed_inc)

Developing and maintaining opensource projects requires significant time. If you find this project useful or need commercial support, we'd love to chat. Drop us an email at [email protected]

Project sponsors may include the following benefits:

• Priority support (outside of Github)
• Feature development & roadmap
• Priority bug fixes
• Privately hosted continuous integration tests for their unique edge or use cases

To use a simple bootstrap script that installs the jdk to /usr/lib/jvm and sets up your PATH and environment variables:

curl -s https://raw.githubusercontent.com/jjlauer/provisioning/master/linux/bootstrap-java.sh | sudo sh

Alternatively, just download the tarballs and do this yourself. They are all published to the "v1" release in this GitHub repository.

If you're interested in building this yourself, this repository is setup for an x86_64 host + docker. There are some automated scripts that will setup a docker container w/ the necessary dependencies to build the OpenJDK w/ the riscv64 toolchain, and cross compile it. It takes around 3 minutes to build on an AMD 7950x.

java -jar setup/blaze.jar setup/blaze.java build_containers
java -jar setup/blaze.jar setup/blaze.java build_jdk19s

Once done building, the ./target/ directory will contain a .tar.gz ready for deployment.