On Mon, 10 Jul 2006 17:04:20 +0100 (BST) "Michael Pacey" <michael@xxxxxxxxxx> wrote: > oz said: > > > 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. 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. > 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
