[Qmidiarp-user] Re : Re : Re : Re : Feature Request: Export Functionality

[Frank K. <goe...@ya...>]

----- Mail original -----
> De : S C Rigler <rig...@gm...>
> À : Frank Kober <goe...@ya...>
> Cc : ""qmi...@li..."" <qmi...@li...>
> Envoyé le : Mercredi 15 Juin 2011 14h33
> Objet : Re: Re : Re : Re : [Qmidiarp-user] Feature Request: Export Functionality

[...Timing issues...]

I remembered this LAU thread about timing in ALSA seq, and particularly one info from Pedro might be useful to find out more about timers used in ALSA seq. Maybe the timers used by different seq queues differ on your system?


----------------------------LAU Message------------------------------

Re: Is ALSA using hrtimer?  
by Pedro Lopez-Cabanillas  ::
Rate this Message:     
| View Threaded | Show Only this Message On Thursday, May 27, 2010, Grant wrote: 
> I have hrtimer support compiled into my kernel, but when I watch 'top' 
> while music is playing I can see that 'timer' uses CPU cycles but 
> 'hrtimer' never does.  How can I find out if ALSA is using hrtimer? 
> 
> - Grant 

In addition to Clemens' message, ALSA MIDI sequencer can use several timer 
sources. To see which ALSA timers are available, use a command like this: 

$ cat /proc/asound/timers 

When a program is using the ALSA MIDI sequencer, you can query the timers   
assigned to each queue using another command: 

$ cat /proc/asound/seq/timer 

Alternatively, the utility "drumstick-sysinfo" [1] shows this information 
using a friendly format. 

Regards, 
Pedro