RFR 8055098: WB API should be extended to provide information about size and age of object.

Leonid Mesnik Leonid.Mesnik at oracle.com
Wed Aug 20 14:44:11 UTC 2014


Thank you very match. I fixed year and bugid.
Here is new webrev:


The tenuring threshold is already set in ProcessBuilder.


On 20.08.2014 17:55, Thomas Schatzl wrote:
> Hi Leonid,
> On Tue, 2014-08-19 at 16:44 +0400, Leonid Mesnik wrote:
>> Dear All
>> Could I have review for this patch.
>> issue: https://bugs.openjdk.java.net/browse/JDK-8055098
>> webrev: http://cr.openjdk.java.net/~jcoomes/8u/lmesnik/8055098-wbapi/
>> This patch applied clearly to jdk8u and jdk9. This is RFR for
>> integration into jdk9/hs-gc. The RFR for backporting I'll send after fix
>> is integrated into jdk9.
>> Fix:
>> WB API was extended by methods which allow to know object size and if it
>> is in old generation. Also whitebox method which added young GC was
>> added. Fix included unit test.
>> Testing: JPRT for 8u and 9, adhoc testing with different GCs.
>    some comments about the test, the other changes look good:
> - TestWBGC.java should probably get a 2014 copyright date
> - the test does not have a bug id
> - could you set the tenuring threshold for this test to 1 so that the
> likelihood that the object is promoted is higher? Different collectors
> may have different default tenuring thresholds.
> I.e. actually, adding -XX:+AlwaysTenure should be sufficient.
> Thanks,
>    Thomas

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