build park slows down

[Tibor Digana <ti...@googlemail.com>]

Hello guys,

Let's discuss build park issues.

The build [1] permanently fails on performance tests because the JVM is
blocked by something.

After a segmentation fault, happened 3 days ago, on JVM Java 7 the machine
Windows1 is already very slow [2].

It looks like something eats the CPU.

Our performance tests in Surefire were always quite stable on [2] because
it's Double Core x64 CPU.

[1] https://builds.apache.org/job/maven-surefire-windows/
[2] https://builds.apache.org/computer/windows1/

Did we change something on the h/w like removed SSD?
Do you have rights to restart the machine?
I guess this should kill processes which unnecessarily eat CPU.

I made some fine tuning with GC (CMS, Parallel, combined, or default) and
nothing solved the problem. So I triggered the build when the machine was
idle and I was watching the logs from GC as well. If you just keep the
console open, you can clearly see that the logs are too slow.

-- 
Cheers
Tibor