10 Jul
2006
10 Jul
'06
9:08 p.m.
On Mon, 10 Jul 2006 17:04:20 +0100 (BST)
"Michael Pacey" <michael(a)wd21.co.uk> wrote:
oz said:
Aha, thanks, that are strong hints, that the realtime patches
compile cleanly against SMP-Kernels (that's good!). But it says not much
about the achieved realtime capabilities.
The situation with the Debian-Kernels seems not to be as clear to me.
Recently I installed a Debian/stable on a dual Opteron and the default
Kernel supported only one cpu (cat /proc/cpuinfo). I had to
post-install a dedicated SMP-Kernel (2.6.15x-SMP). It seems, Debian has
always two versions (SMP and not) of a Kernel. Eventually the
new debian-installer from etch does a better autodetection
and installs a SMP-kernel by default.
Do the realtime patches of Ingo Molnar work with
SMP-Kernels for
example? And the LSM-modules?
Pretty sure Ubuntu ships an AMD64 kernel with PREEMPT and SMP enabled. I
have personally used the realtime-lsm module on an Debian as-shipped SMP
kernel, though not running on an SMP machine. Most (all?) of Debian's
(x86) kernels (and presumably Ubuntu's) ship with SMP enabled by default,
because it still works on uniprocesser machines without overhead. I talk
about Ubuntu and Debian because that's what I use. If you can wait a week or two, I am getting a dual
Opteron X2 (4 core
64-bit) machine this week and my intention is to do audio work on it. I
can tell you how it goes. I hope it goes well, I've spent a lot of money!
Yeah, that would be great to read about it here in the forum!
And I have to wait anyway, because my favorite notebook is not
available the next few weeks.
It's not a laptop. That will bring other
complications, I'msure - take
note of Frank Barknecht's comments on drivers. I have a laptop with Intel
Centrino chipset and it works well, though it is not fast enough for my
audio work (softsynths and rosegarden, moving sequences about, quickly, in
realtime). The graphics card is not Intel, it's ATI, and I'm having to use
their proprietary driver to get what I want out of it. The graphics in the
Opteron box will be nVidia though, so there's no escape as yet...
Ok, but that was a mono-processor (right?). Best wishes for your
quadro-core system! When it will be really fast, chances are good,
that a dual-core in a laptop can be sufficient for me.
Thanks for your comments,
Oliver