[linux-audio-dev] latency and P4 hyperthreading?

[Fernando Pablo Lopez-Lezcano]

> > The problem is not speed but latency glitches. It certainly should be
> > slower than a "real" dual cpu system but it could be slightly faster
> > than the same uniprocessor machine with ht turned off. Of course if you
> > have latency problems it is not very useful. 
> 
> I think its a better win if the kernel understands HT, 

I thought it did, obviously it does not (completely). 

> I have a smp ht
> machine and big parallel therads sometime get stuck on different threads of
> the same cpu, instead of different cpus. If I had no HT in those cases it
> would be faster.

Ha! So I was not imagining things. I had some weird problems when trying
to run jack (but I was distracted with the latency issues so I did not
pay much attention - one problem at a time) so most probably that is the
reason. 

I guess we'll have to wait till the kernel catches up...
-- Fernando