Re: [patch] Real-Time Preemption, -RT-2.6.10-rc3-mm1-V0.7.33-0

[Lee Revell]

On Wed, 2004-12-15 at 10:32 +0100, Ingo Molnar wrote:
> * Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote:
> 
> > the latter. to send MIDI Clock or MIDI Timecode requires an interrupt
> > source that is not locked to jiffie-ish intervals or power-of-2
> > related intervals. For example, MTC requires sending 2 bytes roughly
> > every 0.8msec. Sending them every msec isn't good enough, in general.
> 
> yeah, i can understand that - 20% slower music is bad, even to kernel
> hackers ;-)

It's a bit worse than that.  If there is excessive jitter in your MIDI
clock/MTC then your other devices will fail to lock on to it at all - it
does not degrade gracefully.

Lee

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