RFR: 8360160: ubuntu-22-04 machine is failing client tests [v3]

[Damon Nguyen]

On Mon, 15 Dec 2025 11:51:45 GMT, Alexander Zvegintsev <azvegint at openjdk.org> wrote:

>> I will take stability at the cost of some extra time.
>
>> Is 33 seconds unreasonable for the test? I figured since the upper-limit of frame tests is set to 30, this 33 seconds would be the longest the test would run for. Also, the test only has 1 gc for other OS's so only 1 frame is tested for that. 
> 
> In CI it may be even slower, and we can achieve the same results in a third of the time with showing several windows at once. This can cumulatively save a lot of CI time over many runs. We can still apply the same upper limit to the frame count of frame tests, and this may make it even faster.
> 
>> This avoids the shadow issue as well as creates a more stable test.
> 
> This can be mitigated simply by adding spacing between the frames.

I suppose if this is problematic, I can change it back. But right now it looks OK and the code implementation is cleaner and easier to read this way. Thanks!

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PR Review Comment: https://git.openjdk.org/jdk/pull/28646#discussion_r2621087877