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

[Thomas Schatzl]

Hi,

On Thu, 2019-07-11 at 17:06 -0400, Kim Barrett wrote:
> > On Jul 10, 2019, at 11:40 AM, Thomas Schatzl <
> > thomas.schatzl at oracle.com> 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
> > Testing:
> > hs-tier1-5
> > 
> > Thanks,
> >  Thomas
> 
> Looks good.
> 

  thanks for your review.

Thomas