RFR (S): 8212911: Unify and micro-optimize handling of non-in-collection set references in oop closures

[Stefan Johansson]

On 2018-10-25 11:45, Thomas Schatzl wrote:
> Hi all,
> 
> On Wed, 2018-10-24 at 13:36 +0200, Thomas Schatzl wrote:
>> Hi all,
>>
>>    can I have reviews for this small change that does some minor
>> cleanup and micro-optimization of our main g1 stw/concurrent gc
>> closures?
>>
>> [...]
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8212911
>> Webrev:
>> http://cr.openjdk.java.net/~tschatzl/8212911/webrev/
>> Testing:
>> hs-tier1-3, several hs-tier1-5 runs with other changes, benchmark
>> suite etc.
> 
>    Stefan pointed out that _from_in_young is only used in
> G1ScanEvacuatedObjClosure any more, so it could be moved from
> G1ScanClosureBase.
> 
> Also we brainstormed a bit about the name of _from_in_young, and agreed
> on changing this to _scanning_in_young.
> 
> New webrevs:
> http://cr.openjdk.java.net/~tschatzl/8212911/webrev.1 (full)
> http://cr.openjdk.java.net/~tschatzl/8212911/webrev.0_to_1 (diff)
> 
Look great! =)

StefanJ
> Thanks,
>    Thomas
> 
>