2.6.14-rc2-rt7 - AMD64 runs GREAT! (threaded/non-threaded interrupts?)

2.6.14-rc2-rt7 - AMD64 runs GREAT! (threaded/non-threaded interrupts?)

[Mark Knecht]

Hi,
   I finally managed to find an acceptable set of config options last
even that build correctly. The kernel came right up and is working
wonderfully on my Gentoo system. I've been up for a few hours this
morning with Jack going at 128/2. (<6mS latency) Music is streaming
with no xruns, even while doing emerge sync/emerge world operations.


   One question. In earlier rt kernels there was a way to set specific
ISR routinges as threaded or non-threaded through
/proc/irq/ISR#/DEVICE/threaded. Does anything like this exist anymore?
This feature provided (on earlier rt kernels) an extra degree of
safety that I appreciated. Granted it wasn't for everybody, but I fell
it helped my systems when used.

   Thanks to Ingo & Daniel Walker & Lee Revell for helping me get this
kernel working, and thanks to all who make this possible. We audio
guys really appreciate it.

With best regards,
Mark

Re: 2.6.14-rc2-rt7 - AMD64 runs GREAT! (threaded/non-threaded interrupts?)

[Daniel Walker]

On Fri, 2005-09-30 at 08:54 -0700, Mark Knecht wrote:
> Hi,
>    I finally managed to find an acceptable set of config options last
> even that build correctly. The kernel came right up and is working
> wonderfully on my Gentoo system. I've been up for a few hours this
> morning with Jack going at 128/2. (<6mS latency) Music is streaming
> with no xruns, even while doing emerge sync/emerge world operations.
> 
> 
>    One question. In earlier rt kernels there was a way to set specific
> ISR routinges as threaded or non-threaded through
> /proc/irq/ISR#/DEVICE/threaded. Does anything like this exist anymore?

I think there was a way to select softirqd as thread or not. This
doesn't exist for interrupts because the ISR would need to be modified
at compile time to work correctly. So you can't simple select drivers to
run in interrupt context unless they are specifically written to do so.

Daniel 

Re: 2.6.14-rc2-rt7 - AMD64 runs GREAT! (threaded/non-threaded interrupts?)

[Mark Knecht]

On 9/30/05, Daniel Walker <dwalker@mvista.com> wrote:
> On Fri, 2005-09-30 at 08:54 -0700, Mark Knecht wrote:
> > Hi,
> >    I finally managed to find an acceptable set of config options last
> > even that build correctly. The kernel came right up and is working
> > wonderfully on my Gentoo system. I've been up for a few hours this
> > morning with Jack going at 128/2. (<6mS latency) Music is streaming
> > with no xruns, even while doing emerge sync/emerge world operations.
> >
> >
> >    One question. In earlier rt kernels there was a way to set specific
> > ISR routinges as threaded or non-threaded through
> > /proc/irq/ISR#/DEVICE/threaded. Does anything like this exist anymore?
>
> I think there was a way to select softirqd as thread or not. This
> doesn't exist for interrupts because the ISR would need to be modified
> at compile time to work correctly. So you can't simple select drivers to
> run in interrupt context unless they are specifically written to do so.
>
> Daniel

I'll keep that in mind over the next few days. So far this is running
very, very well, although the testing is still young.

I was beginning to wonder if this machine was going to be useful. I'm
now far more confident.

Cheers and out,
Mark