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

[Phil Race]

On Fri, 12 Dec 2025 17:18:49 GMT, Damon Nguyen <dnguyen at openjdk.org> wrote:

>>> I have switched to a single frame at a time 
>> 
>> This makes the test much slower. On my machine, the execution time is::
>> - ~33s with the one at a time version
>> - ~10s for version with all gcs in batches of 20 
>>  
>> Few notes on placing several frames:
>> <img width="1012" height="222" alt="image" src="https://github.com/user-attachments/assets/98820fd5-5c9e-4f9c-b2d4-a87681a56cb6" />
>> - If they are close enough, they can cast shadows on each other.
>> - If the auto-hide dock is disabled, the dock can overlap frames.  The dock auto-hide is enabled on the CI, but it would be better if it could be moved away from the screen border.
>
> 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. This avoids the shadow issue as well as creates a more stable test.

I will take stability at the cost of some extra time.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28646#discussion_r2615132807