RFR: 8213890: Implementation of JEP 344: Abortable Mixed Collections for G1

Thomas Schatzl thomas.schatzl at oracle.com
Wed Nov 21 10:31:56 UTC 2018


Hi again,

On Wed, 2018-11-21 at 11:26 +0100, Thomas Schatzl wrote:
> Hi,
> 
> On Wed, 2018-11-14 at 16:57 +0100, Stefan Johansson wrote:
> > Hi,
> > 
> > Please review this patch for "JEP 344: Abortable Mixed Collections
> > for G1", the JEP is not yet targeted but the goal is to get it into
> > JDK 12.
> > 
> > JEP: https://bugs.openjdk.java.net/browse/JDK-8190269
> > Issue: https://bugs.openjdk.java.net/browse/JDK-8213890
> > Webrev: http://cr.openjdk.java.net/~sjohanss/8213890/00
> 
> Some comments:
> 
>  - I would really like to have a (trace?) log message at the end of
> the evacuation showing the used memory (and the max? sizes) for the
> optional remembered sets.
> 
> This is very interesting information to (in the future) size number
> of threads etc.

One more related request: the OptScanRS should carry the
scanned/skipped/claimed card information. It would be interesting to
combine this with information about the number of references handled in
the OopStarChunkedLists (i.e. the temporarily gathered references).

Thanks,
  Thomas




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