RFR (XS) 8251949: ZGC: Set explicit heap size for compiler/gcbarriers tests

[Per Liden]

Hi,

On 8/19/20 9:03 AM, Aleksey Shipilev wrote:
> On 8/19/20 9:00 AM, Per Liden wrote:
>> Hi,
>>
>> On 8/18/20 2:41 PM, Aleksey Shipilev wrote:
>>> Testbug:
>>>     https://bugs.openjdk.java.net/browse/JDK-8251949
>>>
>>> On large TR 3970X, jtreg asks for MaxRAMFraction=0, which makes ZGC use
>>> 128M heap for some tests. These tests reliably fail with OOM in
>>> jdk-updates/jdk11u-dev:
>>>     compiler/gcbarriers/UnsafeIntrinsicsTest.java
>>>     compiler/loopopts/TestRangeCheckPredicatesControl.java
>>>
>>> While they do not fail in jdk/jdk, I think it makes more sense to add
>>> explicit heap sizes in jdk/jdk, and then backport to 11u. The
>>
>> If it's only a problem in jdk11u why stick this in jdk/jdk?
> 
> I thought that test configurations are better to agree in all maintained 
> repositories. I haven't pushed yet, can do it just in 11u, if you think 
> that's better.

I would prefer if it's only in 11u, as it otherwise gives the false 
impression that it's (still) needed in jdk/jdk, when it's not.

cheers,
Per