Java threads on multiple processor cores

[Ronald Klop]

On Sat, 23 Feb 2013 04:46:12 +0100, Jurij Kovacic, OCPEA d.o.o.  
<jurij.kovacic at ocpea.com> wrote:

> Hi,
>
> I am running JBoss application server inside a jail on FreeBSD 8.3.  
> Since the server has a quad-core processor, it would be efficient if the  
> java process (and its threads) could utilize more than 1 CPU core at a  
> time, which is not currently the case.
>
> Is it possible to acomplish this (perhaps with the use of a proper  
> threading library) or am I barking up the wrong tree?
>
> Thank you for your reply,
> Jurij

I don't think there is a clear answer on this. It all depends on what is  
running in your JBoss application server. If that application does not use  
more than one thread, there is nothing going to use the other cores. If  
your application uses multiple threads and you are sure they should all be  
calculating very hard than you should debug the application for  
bottlenecks. And look if the bottleneck is in the application code, in the  
JDK or in FreeBSD. This is not possible without inside information of what  
your application is doing.

Ronald.