RFR: Adaptive should not be scared of user-requested System.gc()

[Roman Kennke]

Am 17.05.2017 um 17:52 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/adaptive-silent-sysgc/webrev.01/
>
> Users may trigger System.gc() for their own reasons, we might as well ignore
> that in heuristics decisions that observe the heap occupancies. Also refactors a
> bit.
>
> Testing: hotspot_gc_shenandoah, sanity benchmark runs
>
> Thanks,
> -Aleksey
>
Ok