The s390 aka system z port of OpenJdk

The goal of this project is to provide a full-featured and certifiable Linux/s390x port of OpenJDK in the main OpenJDK development branch.

Ongoing work

SAP is continuously building and testing the port in the jdk11u codeline to avoid any regressions.

Further SAP is maintaining the port in jdk/jdk and new releases together with IBM.

Contributions

Contributions to the port are always welcome. We maintain some issues in the OpenJDK Jira, feel free to address any of these:

Proposed enhancements

Bugs and all other issues

Supported features

The table lists in which JDK version the support for the feature was added.

	linux
template interpreter	9
C2 compiler	9
C1 compiler	9
Servicability agent	9
Class Data Sharing	11
Java Flight Recorder	11
Epsilon GC	11
JVMCI / graal	no
ZGC / Shenandoah	no
recognizes z14 and z15 processors	17

Status

In 2021 (status of April), JDK 16 as well as the security updates for 11, 15 and 16 have been released. Support of the new processors z14 and z15 has been implemented.

In 2020, JDK 14 and 15 have been released as well as the security updates for 11, 13, 14 and 15. A row of bugs have been fixed. GHASH instrinsics were implemented.
SAP does not actively maintain the port in the long-term-support releases of JDK 13 and 15.

In 2019, JDK 12 and 13 have been released, as well as the security updates for 11, 12 and 13.

In 2018, JDK 10 and JDK 11 have been released for linuxs390x. Since JDK 11 Class Data Sharing and Java Flight Recorder are supported. Many issues have been fixed.

In 2017 JDK 9 has been released for linuxs390x.

In November 2016 the port has been integrated into the jdk9/hs repository. It passes the jtreg and jck test suites in a similar scope as other platforms.

Resources

Recent space activity

Space contributors

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