[jdk17u-dev] RFR: 8325616: JFR ZGC Allocation Stall events should record stack traces

[duke]

On Thu, 19 Sep 2024 15:09:03 GMT, Kerem Kat <duke at openjdk.org> wrote:

> Backport of JDK-8325616, conflict in a single hunk that wants to add `ZYoungGarbageCollection` and `ZOldGarbageCollection` to `metadata.xml`, which are unrelated and part of GenZGC.
> 
> #### Verification
> 
> 1. Ran jdk_jfr and hotspot_gc tests. All tests passed.
> 
>   ```
>   make test TEST=hotspot_gc TEST_VM_OPTS=-XX:+UseZGC
>   make test TEST=jdk_jdr TEST_VM_OPTS=-XX:+UseZGC
>   ```
> 
> 2. `ZAllocationStall` event has stack trace entry in the jfr for a sample java program:
> 
> 
> jdk.ZAllocationStall {
>   startTime = 15:07:54.691
>   duration = 4.48 ms
>   type = "Large"
>   size = 12.0 MB
>   eventThread = "main" (javaThreadId = 1)
>   stackTrace = [
>     AllocRate.main(String[]) line: 16
>   ]
> }

@krk 
Your change (at version 9344fd678ae7a0db71f9b5b2f143d5add0e6e2f2) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk17u-dev/pull/2898#issuecomment-2371182396