[linux-audio-user] Re: Processor Recommendation

[Fernando Pablo Lopez-Lezcano]

On Tue, 2003-06-10 at 13:19, Robert Jonsson wrote:
> tisdagen den 10 juni 2003 22.16 skrev Andrew Burgess:
> > >Hyperthreading - the new fancy P4's have it. Does it do anything on
> > >linux? I saw some benchmarks where it really sped up video encoding (on
> > >windows), how similar to sound processing is this?
> >
> > Alan Cox says HT provides 0-30% speedup.
> 
> There was a recent thread on the Jack mailinglist where it seemed likely that 
> latency would suffer when HT was enabled, if I read the thread right... It 
> may had to do with using HT _and_ dual processors though, can't remember...

The one I tested was a single processor P4 with HT enabled. With it
enabled I see latency spikes (10-15mseg) and weird behavior of Jack as
well. Steve (Harris) wrote something about threads not being happy on an
HT processor. So I guess we'll have to wait till there is better kernel
support (or maybe there is a kernel patch that fixes this?)

-- Fernando