Just a short note: I stumbled over the "ForceGarbageCollection" JVMTI
function today. It reliably triggers a full GC and the call only returns
after having run the GC. It will do so, even when System.gc() is
disabled. It looks like it doesn't respect ExplicitGCInvokesConcurrent,
so it will always do a stop-the-world collection leading to possibly
long stop times but also to defragmented tenured space.
As always, it is not expected, that the finalizers will be run.
Maybe something we could add to tcnative. Since the call is stateless,
adding it should be simple, just implementing Agent_OnLoad to initialize
the JVMTI environmnt using GetEnv() and then making
ForceGarbageCollection(env) publicly accessible. One must also register
the JVMTi agent using e.g. the "-agentlib" startup option.
I don't know, whether that would lead to a problem with duplicate
library loading, in which case one would have to separate it from tcnative.
Caution: this is all form looking at docs and code, no tests done yet.
Regards,
Rainer
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