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Enhancement
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Resolution: Unresolved
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P3
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None
The Compact Object Headers feature should be supported as a production feature, and the option should not require the experimental mode flags to turn it on. This will enable us to more readily encourage customers to use this feature and report any performance improvements that they experience.
The feature was tested as-if it was a production feature when integrated and has had ongoing testing.
In order to make this a product option, we need to do a few things.
1. Report and confirm performance information on the latest version of the software. Verify that this is acceptable and expected.
2. Resolution to linked issues.
3. CDS archives will continue to not be generated by default. Users will be provided instructions on how to generate the CDS archives. SeeJDK-8341553.
4. Enable more testing in earlier Oracle tiered testing. This is currently tested in tiers 5, 8 and 10.
5. File a CSR to add the option as a Product option (?)
The feature was tested as-if it was a production feature when integrated and has had ongoing testing.
In order to make this a product option, we need to do a few things.
1. Report and confirm performance information on the latest version of the software. Verify that this is acceptable and expected.
2. Resolution to linked issues.
3. CDS archives will continue to not be generated by default. Users will be provided instructions on how to generate the CDS archives. See
4. Enable more testing in earlier Oracle tiered testing. This is currently tested in tiers 5, 8 and 10.
5. File a CSR to add the option as a Product option (?)
- is blocked by
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JDK-8339114 DaCapo xalan performance with -XX:+UseObjectMonitorTable
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- Open
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JDK-8341703 Remove Klass::_prototype_header
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- Open
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- relates to
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JDK-8350272 Deprecate UseCompressedClassPointers for removal
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- Closed
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JDK-8341553 Remove UseCompactObjectHeaders extra CDS archives
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- Resolved
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JDK-8305895 Implement JEP 450: Compact Object Headers (Experimental)
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- Resolved
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JDK-8340453 C2: Improve encoding of LoadNKlass for compact headers
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- Resolved
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(1 relates to)