From: Charles Oliver Nutter <charles.nutter@...>
Date: 2007-05-15T10:03:31+09:00
Subject: Re: basic threading question: can ruby use real threads?

MenTaLguY wrote:
> On Thu, 10 May 2007 18:45:47 +0900, Marcin Raczkowski <swistak@mailx.expro.pl> wrote:
>> As i mentioned earlier - easiest way to get REAL concurency (java VM will
>> NOT use both processors - for few reasons JavaVM ALWAYS use one processor -
> 
> Have you got evidence for this?  I do not believe it to be the case for a
> non-green-threaded JVM.

The OP is incorrect. Java VMs always use all cores in the system, except 
in a very few specialized VMs that are green threaded.

Even if we're talking about only one thread of execution, there's still 
the GC thread which generally runs in parallel.

- Charlie