RFR (S): Parallelize partial GC cleanup

[Zhengyu Gu]

Ok.

-Zhengyu

On 05/03/2017 10:49 AM, Aleksey Shipilev wrote:
> Ah! Oh!
>
> http://cr.openjdk.java.net/~shade/shenandoah/partial-recycle-parallel/webrev.02/
>
> Thanks,
> -Aleksey
>
> On 05/03/2017 04:20 PM, Zhengyu Gu wrote:
>>
>> ShenandoahCollectionSet already has claim_next() to claim regions for parallel
>> processing.
>>
>> Thanks,
>>
>> -Zhengyu
>>
>> On 05/03/2017 10:12 AM, Aleksey Shipilev wrote:
>>> Hi,
>>>
>>> Matrix and bitmap cleanups take significant time in partial GC. The obvious
>>> solution is to parallelize it at this point, since we have mined out the
>>> sequential improvements.
>>>
>>> Fix:
>>>
>>> http://cr.openjdk.java.net/~shade/shenandoah/partial-recycle-parallel/webrev.01/
>>>
>>> Improves partial GC times significantly under heavy allocation pressure:
>>>   http://cr.openjdk.java.net/~shade/shenandoah/partial-recycle-parallel/perf.txt
>>>
>>> Testing: hotspot_gc_shenandoah
>>>
>>> Thanks,
>>> -Aleksey
>>>
>
>