RFR: 8165443: Free Collection Set serial phase takes very long on large heaps

Stefan Johansson stefan.johansson at oracle.com
Mon Dec 9 09:42:05 UTC 2019

Thanks Thomas and Kim for your reviews,

On 2019-12-06 21:25, Kim Barrett wrote:
>> On Dec 6, 2019, at 4:53 AM, Stefan Johansson <stefan.johansson at oracle.com> wrote:
>> Yes, I mentioned that I didn’t add any heuristic for this and I agree that one worker per region is to much, and in most cases we will already have fewer active workers for small heaps, this clamp was just a way to make sure we don’t have more workers than ever needed.
>> I also agree that we could do some experiments and see if we can come up with a better way to size the number of threads here, but for now I think this is ok.
>> New webrev, full one also contain a change to work with latest WorkerDataArray changes:
>> Full: http://cr.openjdk.java.net/~sjohanss/8165443/03/
>> Inc: http://cr.openjdk.java.net/~sjohanss/8165443/02-03/
> Looks good.

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