RFR: 6973: New Method Profiling Page for JMC

[Marcus Hirt]

On Sun, 29 Nov 2020 17:33:23 GMT, Jean-Philippe Bempel <github.com+4610701+jpbempel at openjdk.org> wrote:

>> I've tested with this .jfr file: https://drive.google.com/file/d/1OqMOFLsODHgRPKybUfw7rK7kv3j9fES3/view?usp=sharing
>> 
>> Selecting `scala.runtime.Statics.releaseFence()` as the Top Method (source code https://github.com/scala/scala/blob/9a716985fcfbb687a3b4cfe97e8eb1d88a65057d/src/library/scala/runtime/Statics.java#L147-L149)
>> 
>> I see Successors that are not called from the method:
>> 
>> <img width="927" alt="image" src="https://user-images.githubusercontent.com/65551/100360273-74c66300-3044-11eb-842e-7fbe7f234170.png">
>> 
>> I can find no CPU sample events that include this method as a non-leaf element in the stack.
>> 
>> Is is possible that something is wrong with the data filtering in the new UI?
>
> Hi @retronym, there is indeed an issue in successors. 
> I need to rework the stacktrace model to give an accurate successor view

Alternatively use the graph model and check the edges from that node. :)

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PR: https://git.openjdk.java.net/jmc/pull/165