Re: Linux/Pro [was Re: Coding style - a non-issue]

[Martin Dalecki]

Alan Cox wrote:
> 
> > > Wasn't it you that were saying that Linux will never scale with more than
> > > 2 CPUs ?
> >
> > No, that wasn't me.  I said it shouldn't scale beyond 4 cpus.  I'd be pretty
> > lame if I said it couldn't scale with more than 2.  Should != could.
> 
> Question: What happens when people stick 8 threads of execution on a die with
> a single L2 cache ?

That had been already researched. Gogin bejoind 2 threads on a single
CPU
engine doesn't give you very much... The first step is giving about 25%
the second only about 5%. There are papers in the IBM research magazine
on
this topic in context of the PowerPC.