Re: 2.6.19-rc6-rt8: alsa xruns

[Daniel Walker]

On Tue, 2006-11-28 at 21:14 +0100, Ingo Molnar wrote:
> * Lee Revell <rlrevell@xxxxxxxxxxx> wrote:
> 
> > On Tue, 2006-11-28 at 11:58 -0800, Fernando Lopez-Lezcano wrote:
> > > Hi, I'm trying out the latest -rt patch and getting alsa xruns when
> > > using jackd and jack clients. This is a sample from the output of
> > > qjackctl / jackd (jack 0.102.25, qjackctl 0.2.21):
> > 
> > Any improvement if you disable high res timers?
> > 
> > Also, the latency tracer does not work on dual core AMD machines due 
> > to the TSC drift.  Might as well disable it.
> 
> i fixed this in -rt8: the latency tracer now uses the time of day 
> clocksource - pmtimer in this case. (that means function tracing is 
> slower than with the TSC, but latency figures are more reliable.)

I have a patch set to make the using the clocksources a little nicer..
Is there anything I should add to that interface to help enable latency
tracing, or are you satisfied with using the timekeeping clocksource?
It might get constrictive after a while.

Daniel

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/