RFR: 8204168: Increase small heap sizes in tests to accommodate ZGC

Stefan Karlsson stefan.karlsson at oracle.com
Mon Jun 4 13:00:51 UTC 2018

Thanks, Per.


On 2018-06-04 15:02, Per Liden wrote:
> Looks good to me.
> /Per
> On 05/31/2018 02:32 PM, Stefan Karlsson wrote:
>> Hi all,
>> Please review this patch to increase the heap size for tests that sets 
>> a small heap size.
>> http://cr.openjdk.java.net/~stefank/8204168/webrev.01
>> https://bugs.openjdk.java.net/browse/JDK-8204168
>> This change is needed to test ZGC with these tests. ZGC doesn't use 
>> compressed oops and has an allocation memory reserve for the GC 
>> thread, and hence have a higher smallest heap size compared to other 
>> GCs in the code base.
>> There are some alternatives to this patch that we could consider (but 
>> I prefer the suggested patch):
>> 1) Disable these tests when running with ZGC
>> 2) Split all these tests into two copies, one copy for ZGC and another 
>> for the other GCs.
>> I've been running all of these changes through tier{1,2,3} and most of 
>> them has been run in tier{4,5,6}.
>> Thanks,
>> StefanK

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