[Mageia-dev] mageia sound tasks

[Sascha Schneider]

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 <ungleichklang at gmail.com>

> 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 <tmb at iki.fi>
>
> 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
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: </pipermail/mageia-dev/attachments/20101229/8146cf31/attachment.html>