4 Jun
2003
4 Jun
'03
6:53 a.m.
On Tue, Jun 03, 2003 at 06:58:03 -0700, Fernando Pablo Lopez-Lezcano wrote:
I thought it did, obviously it does not (completely).
Some do, some dont. I'm not sure where the cutoff comes or if its a patch.
I dont knwo what (linux) thread affinity is like, it could be that if oyu
restart jack it will get its threads stuck to real cpus. If your on a UP
system it doesn't matter ofcourse, its only a problem where you have an
SMP system and all the virtual CPUs are not equal.
- Steve
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 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.