[LAU] new rtirq release (was: Re: Issue with the priority of the sound cards using rtirq)

[Rui Nuno Capela]

On 05/04/2012 12:39 AM, Fernando Lopez-Lezcano wrote:
> On 05/03/2012 10:00 AM, Fernando Lopez-Lezcano wrote:
>> The failure is because there is (as I pointed out) no fixed greppable
>> relationship between the textual information found in /proc/asound/cards
>> and the names of the processes that service the interrupts - I have
>> looked at the relevant kernel code and the names of the processes are
>> arbitrary strings.
>
> Some good news! Something has changed from 2.6.33 to 3.2.x...
>
> This finds all irq setup calls on the 3.2 kernel tree:
>
> find sound/ -type f -exec grep -2 request_irq {] \; -print
>
> The fourth argument to that call is what is going to be shown in the ps
> listing. Now, I found that all _pci_ cards in 3.2.x have KBUILD_MODNAME
> as the fourth argument (that was not the case before!). So anything
> starting with "snd_" is going to be a soundcard, so rtirq could have
> another special case for that.
>
> Rui: this addition/hack in rtirq takes care of snd_hda_intel in my
> 3.2.16-rt27 system and will presumably do the right thing for any other
> pci soundcards:
>
> ----
> # Special for kernel-rt >= 2.6.31, where one can
> # prioritize shared IRQs by device driver (NAME2)...
> # first try with irq names that start with snd_
> PIDS=`ps -eo pid,comm | egrep -i "IRQ.${IRQ}.snd_.*" | awk '{print $1}'`
> if [ -n "${PIDS}" ]
> then
> RTIRQ_TRAIL=":${IRQ}${RTIRQ_TRAIL}"
> else
> # try with the name reported in /proc/asound/cards
> PIDS=`ps -eo pid,comm | egrep -i "IRQ.${IRQ}.${NAME2:0:8}" | awk '{print
> $1}'`
> if [ -n "${PIDS}" ]
> then
> RTIRQ_TRAIL=":${IRQ}${RTIRQ_TRAIL}"
> else
> # Backward compability for older kernel-rt < 2.6.31...
> PIDS=`ps -eo pid,comm | egrep -i "IRQ.${IRQ}" | awk '{print $1}'`
> if [ -n "${PIDS}" ]
> then
> RTIRQ_TRAIL=":${IRQ}${RTIRQ_TRAIL}"
> fi
> fi
> fi
> ----

given that, which got slightly re-hacked somehow, a new rtirq release 
has bumped in:
   http://www.rncbc.org/jack#rtirq

packages:
   http://www.rncbc.org/jack/rtirq-20120504.tar.gz
   http://www.rncbc.org/jack/rtirq-20120504-28.src.rpm
   http://www.rncbc.org/jack/rtirq-20120504-28.noarch.rpm

svn trunk:
   https://www.rncbc.org/svn/rtirq/trunk

cheers && thanks
-- 
rncbc aka Rui Nuno Capela
rncbc at rncbc.org