[Bug 290498] Re: linux-rt restricted to one CPU

[Realtime Dutchman]

Guys,

I have been testing kernel 2.6.29.1-rt8 quite a bit now. This is the home made kernel Luke MacNeil had put on his web site.
see download links:

http://www.lukemacneil.com/linux-headers-2.6.29.1-rt8-custom_2.6.29.1-rt8-custom-10.00.Custom_i386.deb
http://www.lukemacneil.com/linux-image-2.6.29.1-rt8-custom_2.6.29.1-rt8-custom-10.00.Custom_i386.deb

Firstly install 9.04 from scratch and after that install both debs by double clicking the files.
Ignore the two ¨hmm¨ warnings you will get during installation.
Then run update-manager if you want to.

Do not use wicd network tool for wireless because it gave trouble in my pc causing it not to shut down properly
(acpid exiting problem). I installed the ubuntu network manager instead.

I have running it on a my single core P4 and on a dual core pc (Intel
E8400) and runs without crashing and audio is handled real time as it
should. Jack shows me latencies far below 1 ms .

Jack settings:
Priority = 89
Frames/Period = 128
Sample Rate = 48000
Periods/Buffer = 3

The rest is default settings.


It seems that Luke has managed to build a fast kernel without speed and instability troubles. As far as I understand he has used an old ubuntu kernel configuration to setup his kernel (Hardy? I am not sure). Het took his sources from kernel.org.

see web site :
http://www.mail-archive.com/ubuntu-studio-users@lists.ubuntu.com/msg04152.html

I hope someone at the Ubuntu Studio team can have a look at the jaunty
kernel and compare it with Lukes just to find out what is causing an
almost unworkable situation.

If i have some time left I will try to duplicate Lukes work and see if I
can get the same results with newer kernel versions.

I will keep you posted.

Realtime Dutchman.

-- 
linux-rt restricted to one CPU
https://bugs.launchpad.net/bugs/290498
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