RFR (S) 8073705: more performance issues in class redefinition

serguei.spitsyn at oracle.com serguei.spitsyn at oracle.com
Fri Apr 10 20:29:35 UTC 2015

Hi Coleen and Dan,

This is the second class redefinition scalability/optimization fix that 
is in my queue to push into 9 and 8u60.

The approach is similar to the first one but much smaller.
For convenience, these are the links to the first scalability fix:
      Bug report: https://bugs.openjdk.java.net/browse/JDK-8073705
      Open webrev: 

Please, let me know if you have any chance to review this.
This is the last one that is waiting for your attention! :)


On 3/26/15 7:38 PM, serguei.spitsyn at oracle.com wrote:
> Please, review the fix for:
>   https://bugs.openjdk.java.net/browse/JDK-8073705
> Open hotspot webrev:
> http://cr.openjdk.java.net/~sspitsyn/webrevs/2015/hotspot/8073705-JVMTI-redefscale2.1/ 
> Summary:
>    This is the 2-nd round of performance/calability fixes in class 
> redefinition.
>    This time, the two remaining issues that were left alone in the 
> first round fix:
>      - optimized ConstantPoolCache::adjust_method_entries() is used 
> for previous versions
>      - the MemberNameTable::adjust_method_entries() has been optimized 
> too
>      - some cleanup
> Testing:
>   In progress: nsk redefine classes tests, JTREG java/lang/instrument, 
> com/sun/jdi
> Thanks,
> Serguei

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