RFR: Add humongous regions support to partial GC

Zhengyu Gu zgu at redhat.com
Thu Mar 16 15:25:56 UTC 2017

Do you really need _humongous_obj_array? should is_humongous() enough to 
indicate that?



On 03/16/2017 09:10 AM, Roman Kennke wrote:
> This adds support for humongous regions as root regions in partial GC.
> I extended the ShenandoahHeapRegion::oop_iterate() to iterate over a
> subset of a humongous object array (bounded by the region). This way we
> avoid scanning the whole humongous object if the matrix only gives us a
> single region as root.
> Tested using gc-bench/arrayfragger (which crashed before).
> http://cr.openjdk.java.net/~rkennke/partial-humongous/webrev.00/
> <http://cr.openjdk.java.net/%7Erkennke/partial-humongous/webrev.00/>
> Roman

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