JDK-8008406 : Need to backport Dave Dice's locking improvements to JDK 8
  • Type: Bug
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: 7u13
  • Priority: P3
  • Status: Closed
  • Resolution: Duplicate
  • OS: linux_oracle_5.4
  • CPU: x86
  • Submitted: 2013-02-18
  • Updated: 2015-08-19
  • Resolved: 2014-02-03
Related Reports
Relates :  
JDK-7117065 - RFE: Improve contended locking support
Description
When moving JMS 12.1.2 from JRockit to the JDK 7u10, we are seeing up to a 30% regression in performance.

Doing profiling analysis, found differences in how JRockit and HotSpot do locking.

Using Dave Dices's special JDK1.8-b51 HotSpot build with his locking improvements, solves the performance issue.

Creating this issue to track the backporting Dave's locking work into JDK 8

See attached JR-HSLockAnalysis-JMS.pdf for full details

This is related to Bug 15974980
Comments
Under evaluation
05-03-2013
Having now looked at the PDF I can see what is being requested. This would seem to be a duplicate of the RFE JDK-7117065, which was intended to bring Dave Dice's locking improvements into JDK 8.
18-02-2013