JVM: Heap usage via eBPF

[REASY]

JVM comes with DTraces, however, not all JDK builds have them enabled. Is there an interest of integrating those traces into beyla?

I did a POC, technical details can be found in eBPF to monitor heap usage of Java app, repo with code jheapusage

[marctc]

Hey @REASY,

Thanks a lot for reaching out. Definitively your project is something that fits in Beyla, as the OpenTelemetry SDKs produce these kinds of metrics and are needed to have a better view of JVM metrics in our application observability panels. This is how it looks right now, if we could fill some gaps would be awesome.

The main problem here that I see is that your project uses Rust. Let me discuss details internally and will back to you.
thanks!

related #116

[marctc]

We could easily add this code here src/ebpf/jvm.bpf.c and add the probes in generictracer.go. We would gladly accept a PR with these changes. We can help in any step if you need, thanks!

[REASY]

Hi, @marctc

Great, will look at it during the weekend, thanks for the quick feedback!