RFR: 8280761: UseCompressedOops should be set after limit_heap_by_allocatable_memory [v3]

[Thomas Schatzl]

On Fri, 8 Apr 2022 09:13:18 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> test/hotspot/jtreg/gc/arguments/TestUseCompressedOopsFlagsWithUlimit.java line 90:
>> 
>>> 88:     long oneG = 1L * 1024L * 1024L * 1024L;
>>> 89: 
>>> 90:     // Args: MaxRAM , MaxRAMPercentage, forcecoop, expect coop
>> 
>> I am not sure why `MaxRAMPercentage` is needed here.
>
> I think this is that the initial value for `reasonable_max` is exactly `MaxRAM`; you are right that for this test it is not necessary to pass it explicitly, just always set it to 100 percent in the command line.

Consider that values like `MaxRAM` might change in the future (unlikely as it is). Setting it makes following the execution a bit easier imho.

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PR: https://git.openjdk.java.net/jdk/pull/7938