RFR(S/M) : 8243430 : use reproducible random in :vmTestbase_vm_gc

[Igor Ignatyev]

can I get 2nd review for that? or ack. that it's fine to be pushed w/ just one review?

-- Igor

> On May 3, 2020, at 8:29 AM, Igor Ignatyev <igor.ignatyev at oracle.com> wrote:
> 
> 
> 
>> On May 3, 2020, at 12:13 AM, Kim Barrett <kim.barrett at oracle.com> wrote:
>> 
>>> On Apr 30, 2020, at 4:38 PM, Igor Ignatyev <igor.ignatyev at oracle.com> wrote:
>>> 
>>> http://cr.openjdk.java.net/~iignatyev/8243430/webrev.00
>>>> 555 lines changed: 11 ins; 65 del; 479 mod;
>>> 
>>> Hi all,
>>> 
>>> could you please review this small patch?
>>> from JBS: 
>>>> this subtask is to use j.t.l.Utils.getRandomInstance() as a random number generator, where applicable, in : vmTestbase_vm_gc test group and marking the tests which make use of "randomness" with a proper k/w.
>>> 
>>> testing: : vmTestbase_vm_gc test group
>>> JBS: https://bugs.openjdk.java.net/browse/JDK-8243430
>>> webrevs:
>>> - code changes: http://cr.openjdk.java.net/~iignatyev//8243430/webrev.00.code
>>>> 94 lines changed: 11 ins; 65 del; 18 mod;
>>> - adding k/w: http://cr.openjdk.java.net/~iignatyev//8243430/webrev.00.kw
>>>> 229 lines changed: 0 ins; 0 del; 229 mod; 
>>> - full: http://cr.openjdk.java.net/~iignatyev//8243430/webrev.00
>>>> 555 lines changed: 11 ins; 65 del; 479 mod;
>>> 
>>> Thanks,
>>> -- Igor
>> 
> Hi Kim,
> 
>> I could be missing something, bug I don't see where either of these
>> use randomness:
>> test/hotspot/jtreg/vmTestbase/gc/gctests/gctest03/gctest03.java
> gctest03 starts Yellowthread at L#130, and Yellowthread uses nsk.share.test.LocalRandom in its 'run' method at L#167 of vmTestbase/gc/gctests/gctest03/appthread.java
> 
>> test/hotspot/jtreg/vmTestbase/gc/gctests/gctest04/gctest04.java
> gctest04 starts reqdisp thread at L#97, and reqdisp uses n.s.t.LocalRandom in its 'run' method at L#211 of vmTestbase/gc/gctests/gctest04/reqgen.java
>> 
>> test/hotspot/jtreg/vmTestbase/gc/gctests/gctest02/gctest02.java
>> Still importing java.util.Random, but that doesn't seem needed.
>> 53 import java.util.Random;
> you're right, I'll remove it before pushing.
> 
>> 
>> Other than that, looks good.
> thanks for review!
>> 
>> I don't need a new webrev for changes related to the above.
> 
> -- Igor
>> 
>