problem of disk threads whith every rt kernel, except with kernel-2.6.31.11! - Was: Re: Kernel configuration - Was: Re: (No subject)

[Victor henri]

> Subject: RE: problem of disk threads whith every rt kernel, except with	kernel-2.6.31.11! - Was: Re: Kernel configuration - Was: Re: (No	subject)
> From: ralf.mardorf at alice-dsl.net
> To: ubuntu-studio-users at lists.ubuntu.com
> Date: Sun, 13 Feb 2011 09:28:49 +0100
> 
> On Sun, 2011-02-13 at 09:24 +0100, Ralf Mardorf wrote:
> > On Sat, 2011-01-29 at 22:02 +0100, Victor henri wrote:
> > > Hello: 
> > > 
> > > I have a problem since almost one year now. I'm using linuxsampler,
> > > that allows that load very big sample files (one of my .gig file is
> > > 1.6 G for only one piano sound); this use disk streaming.
> > > 
> > > I always have such problem only when i use the RT kernel : 
> > > 
> > > 0x7f6eef1ee860 Disk stream not available in time! 
> > > 
> > > After several message slike that, i get :
> > > 
> > > DiskThread: there was no free slot
> > > Disk stream order failed!
> > > 
> > > Then the sounds clicks, then stops for 10 to 20 seconds, then i can
> > > play again, then it'll come again...
> > > 
> > > This arrives on both Gentoo and Ubuntu 10.10 64 bits; BUT there is one
> > > thing however : there is ONE kernel with wich it doesn't arrive : the
> > > 2.6.31.11-rt from Ubuntu lucid (RT kernel was in the repositories in
> > > Ubuntu untill 10.04 Lucid, then now i have to either take it  from
> > > Abogani's ppa (for lucid or natty) or compile it myself with the
> > > rt-patch from kernel.org; i've tried all of that, and nothings works,
> > > except for the 2.6.31.11-rt from in the repositories of Ubuntu
> > > Lucid-updates)
> > > 
> > > Here are some technical details:
> > >     - I have laptop Asus Core i7 for gamers (supposed to be very
> > > fast);to be noted : it also happens on another Asus Core I7, but NOT
> > > on an another Asus Core i3; 4Go RAM;
> > >     - when i compile myself i choose : real-time preemption (of
> > > course) and Timer frequency 1000 Hz, either on Gentoo or on Ubuntu
> > > with kernel from kernel.org; nothing else is changed in Ubuntu.
> > >     - i've tried with the no-op cfq scheduler also; i use ext3 on
> > > Gentoo and ext4 on Ubuntu;
> > >     - have a nvidia graphic card, but no proprietary driver
> > > installed....
> > > 
> > > i have posted that at the linuxsampler mailing list without succes....
> > > 
> > > Could please someone help me? i LOVE RT-kernel and its
> > > capabilities.... What is it in the linux-rt package that is not
> > > somewhere else and that allows things to work for me....? 
> > > 
> > > Thank you
> > > 
> > > Victor
> > 
> > Did you test what will happen, if you copy the configuration of the
> > 2.6.31.11-rt from Ubuntu Lucid to the source directory, instead of
> > making your own configuration? Rename it from 'config-2.6.31.11-rt' to
> > '.config' in the source directory, before you build the kernel. If you
> > run make oldconfig nothing should be asked.
> > 
> > Hth,
> > 
> > Ralf

Hello Ralph

Yes i did, without succes; i'll retry in case i did something wrong... but i did...

On the other hand, i've asked the question ate the RT kernel mailing list; one of the devolopers of the rt kernel himself tried to help me; but since i was not able to give enough debug info (i need a serial port to get the debug info and i don't have it), nothing came out of it...
I'm curious to see if the new rt-kernel will fix this or not...

Victor

> 
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