RFR [XS]: 8229370: make jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java more stable

[Baesken, Matthias]

Hi David /  Mikhailo , I was busy with other tasks  but today  got back to  8229370 .

I noticed that in the meantime,   the test was excluded  with 

https://bugs.openjdk.java.net/browse/JDK-8230115

"Problemlist JFR TestNetworkUtilization test"


Do you think we still should  rely  on the OS counters , and expect to get  2+ network interfaces,  or  keep  the test excluded (or just relax  the check and  check for 1+  network interfaces on Linux)  ?


Best regards, Matthias



> 
> On 29/08/2019 12:24 am, Baesken, Matthias wrote:
> > Hi David ,   I could  add some  optional  UL logging  to see   what happens.
> 
> I just want to see more visibility at the test level to ensure it is
> finding the interfaces and addresses I would expect it to find.
> 
> David
> 
> > Maybe the  OS counters   that are fetched by   os_perf    are not that
> reliable on some  kernels .
> >
> >
> > Best regards, Matthias
> >