RFR: 8292266: Add JFR event for total Reference processing time

[Thomas Schatzl]

On Fri, 18 Nov 2022 05:04:38 GMT, Sangheon Kim <sangheki at openjdk.org> wrote:

> Hi all,
> 
> Can I have reviews for this change that adds a new JFR event for total Reference Processing time?
> 
> The goal is to generate a new JFR event if there is already measured time. This CR doesn't add new time measurement.
> 
> Testing: hs-tier1 ~ 3
> 
> Thanks,
> Sangheon

Some minor comments in explanation texts/naming, but lgtm.

src/hotspot/share/jfr/metadata/metadata.xml line 393:

> 391:   </Event>
> 392: 
> 393:   <Event name="GCReferenceProcessTime" category="Java Virtual Machine, GC, Reference" label="GC Reference Process Time" startTime="false"

Suggestion:

  <Event name="GCReferenceProcessingTime" category="Java Virtual Machine, GC, Reference" label="GC Reference Processing Time" startTime="false"

src/hotspot/share/jfr/metadata/metadata.xml line 394:

> 392: 
> 393:   <Event name="GCReferenceProcessTime" category="Java Virtual Machine, GC, Reference" label="GC Reference Process Time" startTime="false"
> 394:     description="Total processing time of processed references during GC">

Suggestion:

    description="Total time for processing java.lang.ref.References during GC">

-------------

Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.org/jdk/pull/11230