RFR (S): 8227089: Add timing information for merging humongous remembered sets

[sangheon.kim at oracle.com]

Hi Thomas,

On 7/10/19 8:40 AM, Thomas Schatzl wrote:
> Hi all,
>
>    can I have reviews for this change that adds timing information for
> the part of the merge heap roots phase that dumps eager reclaim
> candidates onto the card table?
>
> I am aware that the eager reclaim phase is actually single threaded -
> there is an extra CR for fixing this (JDK-8141637). At least with
> recent change that effort is hidden by the other work in this phase;
> but until now we did not know that there may be an issue.
>
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8227089
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8227089/webrev
Looks good.

Thanks,
Sangheon


> Testing:
> hs-tier1-5
>
> Thanks,
>    Thomas
>
>