RFR: 8280450: Add task queue printing to STW Full GCs

[Thomas Schatzl]

On Mon, 31 Jan 2022 15:52:40 GMT, Stefan Johansson <sjohanss at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this change that adds task queue statistics printing after full gc marking. This helps diagnosing performance issues there.
>> 
>> Testing: compilation, gha, local testing (all new code is guarded by `TASKQUEUE_STATS` so not compiled in by default)
>> 
>> Thanks,
>>   Thomas
>
> Marked as reviewed by sjohanss (Reviewer).

Thanks @kstefanj @albertnetymk for your reviews

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PR: https://git.openjdk.java.net/jdk/pull/7264