[PlanetCCRMA] planetCCRMA FC1 and 2.80c Hyperthreading

Rui Nuno Capela rncbc@rncbc.org
Fri Sep 3 00:53:01 2004


> The question is: does the current planetCCRMA LL kernel for FC1 that i've
> been using support hyperthreading?

Yes. I have a P4 2.80C box too, which runs the planetccrma 2.4.26.ll
SMP/HT pretty well. Just make sure you do have ACPI enabled at boot time,
or at least add 'acpi=ht' to your smp kernel boot parameter line on grub.

To check if HT is then operational, just `cat /proc/cpuinfo` and you
should see the two (logical) CPUs, instead of just one as it would be if
you run a UP kernel or disabled ACPI.

> I read some previous messages about this on the LAU mailing list
> regarding this issue but in general that was not recommended.

Not that I remember of. That's probably an issue with the current
bleeding-edge FC2 2.6 kernel _and_ the promising voluntary-preempt patch,
which is still rough in the edges, specially on SMP/HT.

> The other question is: can i use HT to my advantage?

I don't think there's any reason why you can't :)

rncbc aka Rui Nuno Capela