[PlanetCCRMA] Ingo kernels

[blindman jones]

On 12/9/06, Fernando Lopez-Lezcano <nando@ccrma.stanford.edu> wrote:
> On Fri, 2006-12-08 at 22:29 -0500, blindman jones wrote:
> > On 12/7/06, Fernando Lopez-Lezcano <nando@ccrma.stanford.edu> wrote:
> > > On Thu, 2006-12-07 at 12:42 -0500, Gregory Maxwell wrote:
> > > > Is anyone here using the Ingo Molnar RT kernel RPMS?
> > > >
> > > > http://people.redhat.com/mingo/realtime-preempt/yum.README
> > >
> > > I'm building my new kernels based on them. I have tried -rt6 with much
> > > better results than his previous versions[*] and I'm compiling -rt8 as I
> > > type. I'm getting close to releasing something on Planet CCRMA...
> > >
> > > The kernels are now named kernel-rt-* so that the problems with
> > > installing older packages are over (that is hardwired in yum with no
> > > easy override).
> > >
> > > You could obviously try them, it would be nice to hear other user
> > > experiences with them.
> >
> > kernel-rt-2.6.19-1.rt10.0001.i686.rpm:
> > Ok, I have a Asus P4PE motherboard+ P4 2.54Ghz and a 1010LT audio card
> > and I have not been able to get any rtt kernels to boot for me, I
> > always used the planetccrma rdt kernels with good results. There are
> > two kernels at the mingo link above, a rt10 & and a rt8... I installed
> > the yum file and only the rt10 showed up in yum, so I installed that.
> > It hung where all the rtt kernels have before "Starting udev:" then
> > nothing. I tried adding acpi=off and it booted. Warm feelings were
> > lost when I started Qjackctl and the output screen showed xruns
> > streaming past till the whole thing crashed and vanished. Qjackctl
> > restarted, I changed the Frames/Period from 256 to 512, same thing...
> > streaming xruns then crash. I changed from 512 to 1024 and periods to
> > 3 and it is up with a few xruns then quiet... That allowed me to fire
> > up JAMin/Ardour but the audio output pops and stutters.
>
> Hmmm, too bad.
> I presume you are running Jack with realtime priority, right?

correct.

> In fc6
> (for now) you need to manually tweak /etc/security/limits.conf to allow
> normal users to access SCHED_FIFO (see my posting with the first
> announcement of packages for fc6).

did that.

> For best performance you also would
> need to have the rtirq script (you could use the one from fc5 for now)
> but I doubt that's the problem in this case.

I will try it anyway... for giggles.

>
> What if you boot without the graphical front end? (ie: edit the grub
> kernel line and remove the "rhgb quiet" part at the end).

did that too.

>
> > kernel-rt-2.6.19-1.rt8.0001.i686.rpm:
> > Same results
> >
> > Fernando:
> > I kept the rt8 installed and will gladly reboot it and supply the
> > output of anything you think will help you... just let me know what
> > you need and I will pass it along.
> >
> > oh, and booting them without acpi=off shows this:
> >
> > irq 20: nobody cared (try booting with the "irqpoll" option)
> > handlers:
> > [<f909bdba>] (ahca_linux_isr+0x0/0x1a7 [aic7xxx])
>
> Hmmm, are you booting from a scsi disk?

no, the scsi card is for a CD burner and a Zip100 disk drive.

> -- Fernando
>
>
> > turning off IO-APIC fast mode.
> > Starting udev:
> >
> > then it hangs.
> >
> > later,
> > mjr
> >
> > >
> > > [*] but the smp machine I was using to test previous versions died over
> > > the weekend and I don't have a replacement yet, so I'm not sure if the
> > > performance is better or if the problems I was having with xruns were a
> > > result of running smp
> > >
> > > -- Fernando
> > >
> > >
> > > _______________________________________________
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> > > PlanetCCRMA@ccrma.stanford.edu
> > > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> > >
> >
> >
>
>


-- 
michael jones * erleichda archiving * usa
shivering is the first step towards your destiny.....