Kernel-lowlatency vs kernel-rt

[ttoine]

I am running 3.5.0.17 -lowlatency, I think from KXstudio repositories.
Works great with Ubuntu 12.10.


2012/11/3 Kaj Ailomaa <zequence at mousike.me>

> On Fri, 02 Nov 2012 23:58:39 +0100, Ralf Mardorf <
> ralf.mardorf at alice-dsl.net> wrote:
>
>  Hi :)
>>
>> on Ubuntu Studio Quantal I switched to
>> $ uname -a
>> Linux qrc 3.6.5-rt14 #1 SMP PREEMPT RT Fri Nov 2 21:36:37 CET 2012
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> A kernel-rt seems to be much better on my machine.
>>
>> With the kernel-lowlatency for a very small audio session, CPU usage
>> "< 10%", I get xruns with
>>
>> sample_rate=48000
>> frames_period=512
>>
>> Now, with the kernel-rt everything seems to be [Ok] with
>>
>> frames_period=256
>>
>> but with frames_period=128 I get xruns again.
>>
>> Regards,
>> Ralf
>>
>>
> Did you compare with a lowlatency of the same kernel version?
> If not, the test is not very conclusive.
>
> If you like to see some good results from a lowlatency kernel, try 2.6.37,
> and perhaps also 2.6.38 and 2.6.39
> As you might have experienced, something made kernels less reliable from
> somewhere around version 3.
> I haven't tried 3.6 series yet.
>
>
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