RFR: 8325482: Test that distinct seeds produce distinct traces for compiler stress flags [v2]

[Saranya Natarajan]

On Mon, 4 Aug 2025 08:14:28 GMT, Damon Fenacci <dfenacci at openjdk.org> wrote:

>> Saranya Natarajan has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - changing N to 5
>>  - Adding test for same seed --> same result for N = 10
>
> test/hotspot/jtreg/compiler/debug/TestStressDistinctSeed.java line 99:
> 
>> 97:         if (args.length == 0) {
>> 98:             for (int s = 0; s < 5; s++) {
>> 99:                 igvntrace = igvnTrace(s);
> 
> Did you choose the 0-4 seeds to be sure that there are at least a couple of different traces? I guess it wouldn't be so easy to exclude that with random values, right?

Thank you for the review.
This comes from [test/hotspot/jtreg/compiler/debug/TestStressDistinctSeed.java](https://github.com/openjdk/jdk/pull/26554/files/14617e01a032fe05775eda36f4f3172137ccd2e8#diff-abc400ea5cb08b3f662a32173c0ee2d15306f51d1e8930bd295ab7c2d2b52980) and my reasoning is same as what you mentioned above.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26554#discussion_r2251370113