Why does the Subphase weak roots JVMTIWeakExport is always increasing?

[Stefan Karlsson]

My guess is that you have some kind of JVMTI agent that adds objects 
tags. See:
https://docs.oracle.com/en/java/javase/11/docs/specs/jvmti.html#objectTags

The JVM holds an internal hashmap from object to tags. In older ZGCs 
releases we updated the object references in that hashmap during a 
pause. This was later moved to a concurrent phase with 
https://bugs.openjdk.org/browse/JDK-8212879.

StefanK

On 2022-09-05 11:19, 苗昌宇 wrote:
> When I use ZGC on JDK11.0.8 in an online service, I find the time of 
> Subphase weak roots JVMTIWeakExport is always increasing as our 
> service is running. I want to know want made that？
> Hope you will teach me.
>
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