RFR 8207964: [TESTBUG] Change stressTime to default to 30 for nsk tests

[coleen.phillimore at oracle.com]

On 1/9/19 4:28 PM, David Holmes wrote:
> Hi Harold,
>
> cc'd serviceability as a lot of nsk tests are in that area.
>
> On 10/01/2019 4:56 am, Harold David Seigel wrote:
>> Hi,
>>
>> Please review this fix to change the default stress time for hotspot 
>> vmTestbase tests from 60 seconds to 30 seconds.
>
> Which tests actually use this default value?

All tests that don't pass -stressTime <some other number> eg: 
vmTestbase/metaspace/stressHierarchy tests.
The closed tests also don't pass -stressTime except a couple.

Some of the GC unloading tests pass -stressTime 180.

>
>> Open Webrev: 
>> http://cr.openjdk.java.net/~hseigel/bug_8207964/webrev/index.html
>
> The actual change to the default appears correct.
>
> I just don't know what impact this is going to have on any actual tests.
>

I ran some of these manually setting -stressTime 30 like 
vmTestbase/metaspace/stressDictionary/StressDictionary.java and it ran 
enough iterations to do the work needed in the test.  That's why I 
suggested making the default lower.

This change looks good to me.
Thanks!
Coleen
> Thanks,
> David
>
>> JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8207964
>>
>> The fix was tested by running Mach5 hotspot tiers 1-5 on Linux-x64, 
>> Windows, Solaris, and Mac OS X.
>>
>> Thanks, Harold
>>