RFR(M) 8043575: Dynamically parallelize reference processing work

[Kim Barrett]

> On Jun 8, 2018, at 10:52 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Webrev is at http://cr.openjdk.java.net/~tschatzl/8043575/webrev.3/ .
> 
> This webrev is based on top of latest jdk/jdk and https://bugs.openjdk.
> java.net/browse/JDK-8202845 .
> 
> If you want to test parallel gc, you also need the fixes for JDK-
> 8204617 and JDK-8204618 currently out for review.
> 
> Testing:
> hs-tier1-4,jdk-tier1-3 with +/-ParallelRefProcEnabled
> 
> Thanks,
>  Thomas

Looks good.