Java multi CPU capabilities

[William Muriithi]

> java is NOT the application.  It is the language and runtime for the
> application.
My bad. Agree, that a serious error on my side.

>If an application wants to use multiple CPUs, then the
> author of the application should write a threaded application.
>
But how do you achieve that if your application is restricted without a
container that is only single kernel threaded?
> There is certainly research into making runtimes and languages that
> can automatically make some parts of the code run in parallel, but that
> isn't something you are likely to see in current production systems.
>
That seem to be the case

> So if your application written in java creates multiple threads, then
> it will use multiple CPUs just fine.
>
Not necessary.  Sure, you can have as many threads as you want in the
container, but if that container just make a single kernel thread, you
wouldn't be able to sprend the thread across more than one CPU.

That's what I am observing on both openjdk and sun Java.

Casually check any server running Java based system and you will see the
whole application look like a single process to the operating system.  How
do you explain that?
> --
> Len Sorensen
> --
William
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