[linux-audio-dev] [ANN] E-Radium V0.61b
Eric Dantan Rzewnicki
rzewnickie at rfa.org
Wed Jul 13 10:49:11 EDT 2005
On Tue, Jul 12, 2005 at 07:34:07PM -0400, Lee Revell wrote:
> On Wed, 2005-07-13 at 01:03 +0200, Florian Schmidt wrote:
> > Some semieducated blabbering ahead (might be all wrong):
> > I think i once read that interrupt handling "short circuits" the linux
> > scheduler (in the sense that not only at every timer interrupt but also
> > at the end of finishing any interrupt handler the kernel looks which
> > processes are ready to run etc. and maybe there's a high prio process
> > waiting just for that interrupt (by i.e. polling or reading on a device
> > file).
> > So for all those realtime processes that depend on events that are
> > triggering interrupts (like soundcards' irqs) the timer interrupt really
> > doesn't matter. I'm not sure at all though this applies to midi handling
> > (and especially to alsa_seq when routing from one app to another) or is
> > even correct in any sense at all :)
> > Anyone can shed light?
> Correct, it's not an issue for apps driven by hardware interrupts like
> JACK, because the sound card consumes data at a constant rate. But for
> MIDI or video where you have to periodically push data to the device it
What is driving the kernel-devs to regress on this issue?
Eric Dantan Rzewnicki | Systems Administrator
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