RFR (xxs) JDK-8012525 gc/metaspace/G1AddMetaspaceDependency.java Test fails a safepoint timeout assertion or hangs.

[Mikael Gerdin]

On 10/02/2013 01:09 PM, Thomas Schatzl wrote:
> On Tue, 2013-10-01 at 11:44 +0200, Mikael Gerdin wrote:
>> Hi
>>
>> Please review this small test fix to work around a problem where the
>> test accidentally provokes a very slow execution path in the VM.
>> This slow path can cause very long GC pauses or delayed safepoints.
>>
>> Summary of the bug:
>> The byte array allocation causes a big MemRegion to be stored as the
>> thread's deferred_card_mark. This can cause two separate slow code paths:
>> [...]
>> I've ran the test with the large allocation removed and it still
>> successfully reproduces the bug it was written to provoke on an unfixed
>> build, so my suggestion is to simply remove the byte array allocation.
>>
>> The bug is unfortunately not externally visible.
>>
>> Webrev: http://cr.openjdk.java.net/~mgerdin/8012525/webrev
>
> Looks good.

Thanks, Thomas
/Mikael

>
> Thomas
>