JDK-8151814 : Tune thread usage for concurrent tasks
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P3
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2016-03-14
  • Updated: 2019-02-11
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.

To download the current JDK release, click here.
Other
tbdUnresolved
Related Reports
Blocks :  
JDK-8155232 - Augment Workgang to run task with a given number of threads
Relates :  
JDK-8172792 - JEP 308: Improve Dynamic Number of Thread Sizing for G1
Relates :  
JDK-8077144 - Concurrent mark initialization takes too long
Description
Concurrent tasks often suffer from using too many threads because there is too little work available.

Look at the various concurrent mark phases and see which of them can be easily automatically tuned to use a more optimal number of threads, and implement that.
Comments
Moving to 9.1, as a complete look at all tasks might not be feasible currently. There are several tasks (linked) that were already tuned. See JDK-8155232.
02-05-2016