JVM support

[brancz]

This could be a built-in and pprof-integrated version of perf-map-agent and/or async-profiler.

Plan

1. In Phase one, use async-profiler to profile JVM processes. Embed "async-profiler" to profile JVM processes #1115
2. In Phase two, use the eBPF profiler to collect the profiles.

[cskinfill]

any progress with JVM support?

[brancz]

If the JVM is started with the above-linked perf-map-agent then soon there will be support. The important one is #101, but we still lack support for translating container PID to kernel-wide PID, I'm hoping to get to that this week. That said we want users not to have to do anything, so even when that does work, we will keep this open as we want parca-agent to do it all eventually.

[brancz]

Starting with the v0.3.0 release if the perf-map agent is used, then JVM can be profiled with parca-agent today!

[brancz]

Looks like there is also some precedence of profilers at the intersection of eBPF and java, that some inspiration could come from: https://github.com/weixingsun/jBProF

[petr-postulka]

Hi, is there any update for this ticket? Any ETA when JVM profiling is supported by parca-agent by default?

[kakkoyun]

We just started working on this. We plan to land an initial support before this year ends.

[Hixon10]

FYI: Maybe https://github.com/grafana/JPProf helps somehow with implementation for given task.

[kakkoyun]

FYI: Maybe https://github.com/grafana/JPProf helps somehow with implementation for given task.

Thanks for the suggestion. JPProf is a library you need to add to your application, so it's instrumentation. We are planning to provide an experience where you don't need to change anything in your application :)

[fzyzcjy]

Hi, is there any updates (after two years)? This project looks quite interesting, and I hope to use it in my environment!

[brancz]

We’re making progress and a first integrated version should be only a few weeks away.

Just to be clear though, you have always been able to profile Java workloads by enabling these flags: https://github.com/parca-dev/parca-demo/blob/882b4e77496507ec4b0b839df5dd15c6beff8dd2/java/Dockerfile#L19

[xpbob]

Hi, I am very interested in this JVM support. Is there any new progress？

[gnurizen]

New agent supports JVM w/o any instrumentation necessary.