RFR(S): 8151808: Factor G1 heap sizing code out of the G1CollectorPolicy

[Jesper Wilhelmsson]

Looks good!
/Jesper

Den 15/3/16 kl. 14:40, skrev Mikael Gerdin:
> Hi all,
>
> The code responsible for determining the heap expansion amount is currently part
> of the class G1CollectorPolicy. The computations and data required by this
> functionality is completely independent of the other pieces of the class and
> could be moved to class of its own.
>
> One could of course imagine that there could be situations where the sizing of
> the heap is influenced by the more general collector policy but there is nothing
> preventing that with the new model. The only difference would be that there
> would be a need for clearer API for such influences.
>
> The patch is based on 8151711 and 8151637 but can be delivered separately, I
> just have them all in the same workspace.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8151808
> Webrev: http://cr.openjdk.java.net/~mgerdin/8151808/webrev.0/
> Testing: JPRT, RBT GC Testing
> Perf testing in aggregate with some other policy changes shows no regressions or
> improvements.
>
> /Mikael