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eclipse-openj9 / openj9-docs

Source repository for the Eclipse OpenJ9 user documentation, which should be viewed [online]https://www.eclipse.org/openj9/docs/
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Add support for Hotspot Objectheap/Codecache options #459

Closed AlenBadel closed 3 years ago

AlenBadel commented 4 years ago

See associated OpenJ9 PR https://github.com/eclipse/openj9/pull/7476

Overview: To mitigate the effort required for users to migrate to OpenJ9 from Hotspot the following options have been added.

-XX:LargePageSizeInBytes= equivalent to -Xlp:Codecache:pagesize= and -Xlp:Objectheap:pagesize.

-XX:+UseLargePages both the objectheap and codecache use the largest available large page sizes available on the system.

Release target: Eclipse OpenJ9 0.18.0 0.19.0 0.20.0. 0.21.0

Applies to the following JDK versions: 8 and later

Applies to the following platforms: All platforms

For new command line options:

-XX:LargePageSizeInBytes= Size can be either Integer values, or a mixture of Integer values followed a prefix (K/M/G) to signify the magnitude of the large pages. There is no range restriction as the algorithm will try to find the closest supported large page.

-XX:+UseLargePages (Uses no further arguments)

SueChaplain commented 4 years ago

Very similar to #453 in terms of the updates needed.

SueChaplain commented 3 years ago

OpenJ9 issue is closed and marked as obsolete. Closing this issue too.

Closing as this is obsoleted by #8671