RFR: 8271722: [TESTBUG] gc/g1/TestMixedGCLiveThreshold.java can fail if G1 Full GC uses >1 workers

[Thomas Schatzl]

On Tue, 3 Aug 2021 13:17:48 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> I tried to make this pr is dependent on #4968. Hope this works...
> 
> The change fixes a test issue in gc/g1/TestMixedGCLiveThreshold.java by adding
> the option `-XX:ParallelGCThreads=1`. This prevents the full gc from running
> with more than one worker because if it would do that, live data could be
> distributed into several regions and one of them could be selected for
> collection which is unexpected with `-XX:G1MixedGCLiveThresholdPercent=25`.
> 
> Please refer to the JBS-Item for more details.
> 
> Thanks, Richard.

Lgtm.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/4971