RFR: 8292265: Add old gen used field at G1HeapSummary JFR event. [v2]

[Albert Mingkun Yang]

On Mon, 28 Nov 2022 06:30:42 GMT, Sangheon Kim <sangheki at openjdk.org> wrote:

>> Hi all,
>> 
>> Can I have reviews for this change which adds 'old gen used' field at existing G1HeapSummary event?
>> 
>> Testing: tier1 ~ tier3
>> 
>> Thanks,
>> Sangheon
>
> Sangheon Kim has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Thomas review

src/hotspot/share/gc/g1/g1CollectedHeap.cpp line 2562:

> 2560:   size_t eden_used_bytes = _monitoring_support->eden_space_used();
> 2561:   size_t survivor_used_bytes = _monitoring_support->survivor_space_used();
> 2562:   size_t old_used_bytes = _monitoring_support->old_gen_used();

I think it's best to include `gen` in the name (across the whole PR), just to avoid the confusion of Old-region-type vs old-generation.

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PR: https://git.openjdk.org/jdk/pull/11303