RFR: 8274033: Some tier-4 CDS EpsilonGC tests throw OOM [v2]

[Ioi Lam]

On Wed, 22 Sep 2021 06:10:18 GMT, David Holmes <dholmes at openjdk.org> wrote:

> The changes to the test files seem unrelated to the current issue. ??

The fix in DynamicArchiveTestBase.java is needed because we were not passing `-XX:+UseEpsilonGC` to dynamicArchive/HelloDynamic.java (even when this file is in the `hotspot_cds_epsilongc` group).

> test/hotspot/jtreg/TEST.groups line 402:
> 
>> 400:   runtime/cds/appcds/sharedStrings/SharedStringsBasic.java
>> 401: 
>> 402: hotspot_cds_epsilongc = \
> 
> I don't know why we don't comment groups in this file but please add a comment here that these are low-memory using tests that won't fail (with a reasonable heap size) when run with a fake GC.

I added a comment.

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PR: https://git.openjdk.java.net/jdk/pull/5626