JDK-8049158 : Improve Contended Locking Development
- Type: Sub-task
- Component: hotspot
- Sub-Component: runtime
- Affected Version: 9
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2014-07-03
- Updated: 2015-08-19
- Resolved: 2015-08-13
The Version table provides details related to the release that this issue/RFE will be addressed.
Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
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Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.
To download the current JDK release, click here.
| JDK 9 |
|---|
9 b76Fixed  |
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Description
The Contended Locking project is divided into a series of buckets each of which represents a focused set of changes on Monitors with potential performance implications. The development strategy is to define each bucket as a milestone and within each milestone, prepare the code changes, develop micro-benchmarks, run formal performance testing against the changes and integrate the code changes. Milestone 1 (End of July 2014) *Implement field reordering and cache line alignment Update: This bucket was pushed via JDK-8049737 in JDK9-B37. Milestone 2 (End of August 2014) *Implement speed up PlatformEvent unpark() Update: This bucket was pushed via JDK-8061552 in JDK9-B40. Milestone 3 (End of September 2014) *Implement fast Java Monitor Enter operations Update: This bucket was pushed via JDK-8061553 in JDK9-B53. Milestone 4 (End of October 2014) *Implement fast Java Monitor Exit operations Update: This bucket was pushed via JDK-8073165 in JDK9-B64. Milestone 5 (End of November 2014) *Implement fast Java Monitor Notify/NotifyAll operations Update: This bucket was pushed via JDK-8075171 in JDK9-B76. Milestone 6 (End of December 2014) *Implement adaptive spin improvements and SpinPause on SPARC Update: Moved the Adaptive Spin and SpinPause on SPARC improvements out of this JEP to a future RFE due to continued investigation into better optimizations on the latest hardware.
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