RFR: 8290023: Remove use of IgnoreUnrecognizedVMOptions in gc tests

[Thomas Schatzl]

On Mon, 11 Jul 2022 17:52:08 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for removal of the use of `-XX:+IgnoreUnrecognizedVMOptions` for gc tests?
>> 
>> As per [JDK-8228493](https://bugs.openjdk.org/browse/JDK-8228493) use of that option has drawbacks wrt to test reliability, so trying to remove them by
>> * duplicating `@test` blocks (mostly sme Shenandoah tests as I could not find a good way for them)
>> * adding additional `@requires`
>> * removing it in tests where it is not actually required
>> 
>> Testing: gha, running tests
>> 
>> Thanks,
>>   Thomas
>
> test/hotspot/jtreg/gc/g1/TestLargePageUseForAuxMemory.java line 121:
> 
>> 119:                                                  "-XX:" + (largePageEnabled ? "+" : "-") + "UseLargePages" });
>> 120:         if (Platform.is64bit()) {
>> 121:             vmOpts.add("-XX:ObjectAlignmentInBytes=8");
> 
> As 8 is the default value, I'm not sure why this option is being added.

Idk, I removed it.

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PR: https://git.openjdk.org/jdk/pull/9443