RFR: JDK-8086056: ParNew: auto-tune ParGCCardsPerStrideChunk

Srinivas Ramakrishna ysr1729 at gmail.com
Wed Jun 17 22:48:05 UTC 2015


Looks good to me.

-- ramki

On Wed, Jun 17, 2015 at 3:30 PM, Tony Printezis <tprintezis at twitter.com>
wrote:

> Hi all,
>
> A small patch for your consideration:
>
> http://cr.openjdk.java.net/~tonyp/8086056/webrev.0/
>
> (BTW, for some reason some of the webrev output is a bit messed up. Not
> sure why, maybe some hg incompatibility I guess. The diffs look OK though.
> I also attached the patch to this e-mail.)
>
> There’s a bit of info on the JIRA on the rationale for the patch:
>
> https://bugs.openjdk.java.net/browse/JDK-8086056
>
> The min / max values for the old gen capacity and ParGCCardsPerStrideChunk
> were chosen empircally after running a few (mostly synthetic tests) on
> Linux x64. If someone has the cycles to do a more extensive performance
> study, I’d be happy to revise them accordingly.
>
> Regards,
>
> Tony
>
> -----
>
> Tony Printezis | JVM/GC Engineer / VM Team | Twitter
>
> @TonyPrintezis
> tprintezis at twitter.com
>
>
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