RFR: 8311986: Disable runtime/os/TestTracePageSizes.java for ShenandoahGC

[Leslie Zhai]

On Fri, 14 Jul 2023 09:32:55 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

>> I think it has to do with https://bugs.openjdk.org/browse/JDK-8310110 -- the test passes before that commit, and fails after it.
>
>> I think it has to do with https://bugs.openjdk.org/browse/JDK-8310110 -- the test passes before that commit, and fails after it.
> 
> Yes, before https://bugs.openjdk.org/browse/JDK-8310110 we did not output anything for Shenandoah, so this test was just is a noop since the Matcher does not match anything to check.
> 
> I now remember again. Underlying cause is that AUX bitmap is madviced incorrectly for Shenandoah. 
> 
> See https://github.com/openjdk/jdk/pull/14486#issuecomment-1598871634 . 
> 
> I have a line of patches upcoming, starting with https://github.com/openjdk/jdk/pull/14739, then https://github.com/openjdk/jdk/pull/14559, and the AUX bitmap issue must wait at least until 14739 is in. Then, finally, this test can be enabled properly for Shenandoah.
> 
> Its all sideline stuff though, since my main focus is Lilliput and native heap trimming. Its also Reviewer-bound - the THP detection fix alone is already open since > 2 weeks.

Hi @tstuefe 

> I now remember again. Underlying cause is that AUX bitmap is madviced incorrectly for Shenandoah.

Added `Leslie Zhai Bitmap` and `Ray Zhai Bitmap` before `Aux Bitmap` on purpose for [DEBUG](https://github.com/xiangzhai/jdk/commit/b3a092ea6e461309012869c043243ef014278054) :)

Thanks,
Leslie Zhai

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PR Comment: https://git.openjdk.org/jdk/pull/14858#issuecomment-1635594682