problem of disk threads whith every rt kernel, except with kernel-2.6.31.11!

[Victor henri]

Yes i forgot to mention that is the RT kernel that makes the difference; for now, it works ok with the generic kernel with optimized parameters, such as 
   - preemptible kernel (low latency desktop);
   - timer frequency 1000 Hz

but it works quite ok with Linuxsampler alone; but when i want to add some applications, for example rosegarden to record, Xruns arrive, even with a bigger latency in jack....

________________________________
> Date: Sat, 29 Jan 2011 22:02:34 +0000
> Subject: Re: problem of disk threads whith every rt kernel, except with
> kernel-2.6.31.11!
> From: ricardolameiro at gmail.com
> To: ubuntu-studio-users at lists.ubuntu.com
>
> Have you tried it without RT kernel?
>
>
> 2011/1/29 Victor henri >
> (I've posted this already without subject; i allow myself to repost to
> make it; please ignore the other one; i apologize for the mistake i
> made)
>
> 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
>
>
>
>
>
>
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