[luau] hyperthreading facts

[Robert Green]

--- MonMotha <monmotha at indy.rr.com> wrote:
> Robert Green wrote:
> > I don't know much about Hyperthreading, but do the applications
> need
> > to be specially optimized and/or recompiled for you to get
> > performance increases, or will standard applications see these
> types
> > of improvements just due to the CPU alone?
> > 
> > Thanks!
> > 
> > Rob
> 
> Anything that would benefit from SMP can potentially benefit from 
> HyperThreading.  In other words, if your app is threaded (and the
> threads are 
> doing different things, using different functions of the CPU), it
> can benefit.
> 
> You can also benefit if you're running more than one process (you
> are).  The 
> kernel sees the HyperThreaded CPU as 2 CPUs and schedules between
> them 
> appropriately.  However, the 2.5 series that's HyperThreading aware
> knows the 
> limitations and benefits of hyperthreading (shared cache, etc). 
> Therefore, it 
> will schedule according to this (especially useful in situations
> where you have 
> more than one HyperThreading CPU).
> 
> --MonMotha

I am primarily concerned with applications like MUDs (chatroom like
envirmonment) and web servers - I take it these would get an
excellent benefit from Hyperthreading, then?

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