RFR: 8259954: gc/shenandoah/mxbeans tests fail with -Xcomp

[Eric Liu]

On Thu, 21 Jan 2021 09:09:22 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the bug report for initial observation. The key thing is that the asynchronous GC notifications can arrive late, and they do arrive late with `-Xcomp`, because all that code is now waiting for compilation. The answer is to wait a bit smarter.
> 
> Additional testing:
>  - [x] `gc/shenandoah/mxbeans` default mode
>  - [x] `gc/shenandoah/mxbeans` with `-Xcomp`
>  - [x] `gc/shenandoah/mxbeans` with `-Xint`

test/hotspot/jtreg/gc/shenandoah/mxbeans/TestChurnNotifications.java line 167:

> 165:             Thread.sleep(1000);
> 166:         }
> 167:         Thread.sleep(5000);

I was wandering if it's necessary to handle the timeout by the code itself instead of delegating to jtreg? In the worst case, that's a really long time about 960000ms.

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PR: https://git.openjdk.java.net/jdk/pull/2179