I made a couple of simple kernel tests with different Mandriva kernels to see if Kernel-RT is really needed or should be recommanded. I used the same song in same daw with qjackctl, same everything, except the kernel. I used the Hunz-Demo-song in Renoise 2.6 with low Frames in QJackctl to force some XRUNS on my Laptop with onboard soundcard.
- kernel-desktop-2.6.33.7-2mnb => 14 XRUNS - kernel-desktop-tmb-desktop-2.6.34-10mdv => 10 XRUNS - kernel-rt-2.6.33.5-1.rt23.1 => 2 XRUNS I also use the RTIRQ from Rui Nuno Capela with the Kernel-RT any other experiences?? regards, saschas 2010/12/22 Sascha Schneider <[email protected]> > This sounds great, > > latest kernel-tmb I see in the repos (64bit) is 2.6.31 > will test it this eve on my both mashines with my musicapps. > > Thanks Thomas > > added this kernel as an option to the wiki > > regard, saschas > > 2010/12/22 Thomas Backlund <[email protected]> > > SaschaS skrev 17.12.2010 18:49: >> >> After having a looong chat with the guys from linux4audio and reading >>> tons of posts in ccrma forum, I must say ..... >>> >>> Idea with an rt-kernel for netbooks ....... DISMISSED .... it simply >>> makes no sense. >>> Those guys mostly use gentoo and build their own kernel for years now >>> and they gave me the following hints, that also can be found in >>> discussions of other distributions: >>> 1) the kernel (without preemption-patch) should have >>> >>> Processor type and features>> Preemption Mode>> Complete Preemption >>> (Real-Time) >>> >> >> This is already enabled in kernel-tmb >> >> >> >> Processor type and features>> Timer frequency>> 1000 HZ >>> >> >> This is already enabled in all -desktop kernels >> >> >> >> General setup>> RCU Subsystem>> RCU Implementation (Preemptable >>> tree-based hierarchical RCU) >>> >> >> This is already enabled in kernel-tmb >> >> >> >> Proccesor Type and features >> Tickless System (Dynamic Ticks) should >>> be excluded >>> >> >> This one you can get by booting with "nohz=off" on the kernel command >> line. >> >> -- >> Thomas >> > >
