[crac] RFR: 8369566: CRaC: Record metrics during checkpoint [v6]

[Radim Vansa]

On Thu, 23 Oct 2025 08:46:28 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

>> Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add license header
>
> src/java.base/share/classes/jdk/internal/crac/mirror/impl/GlobalContext.java line 73:
> 
>> 71:         // and the context created by jdk.crac.Core (the 'user' global context). We won't record score for
>> 72:         // the internal context as if registered here, beforeCheckpoint would be called after Core.Priority.SCORE
>> 73:         // and the score would not be recorded.
> 
> BTW, it could be useful to count the amount of system-registered resources (recursively, not just the size of the top-level context). Same rationale: more resources => the system is "warmer". But I am not sure the usefulness is great enough to actually implement that.

By system-registered, do you mean `JDKResource` instances? OK, this would be doable (though not recursively, I'd just iterate all Core.Priority contexts).

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PR Review Comment: https://git.openjdk.org/crac/pull/269#discussion_r2454561419