[Jackit-devel] Re: [linux-audio-user] 2.6.10

[Fernando Lopez-Lezcano]

On Wed, 2004-12-29 at 18:29, Lee Revell wrote:
> On Wed, 2004-12-29 at 17:30 -0800, Fernando Lopez-Lezcano wrote:
> > On Wed, 2004-12-29 at 16:52, Lee Revell wrote:
> > > On Wed, 2004-12-29 at 16:21 -0800, Fernando Lopez-Lezcano wrote:
> > > > On Wed, 2004-12-29 at 15:10, Lee Revell wrote:
> > > > > I tried JACK today with vanilla 2.6.10 and had excellent reaults - it
> > > > > works with 32 and 64 frames, which previously required Ingo's patches.
> > > > > Many of the latency fixes have been going upstream, and it looks like we
> > > > > are finally showing some results.  I think we may finally have a kernel
> > > > > that's usable out of the box for low latency audio.
> > > > > 
> > > > > Can someone else try to verify these results?
> > > > 
> > > > I'll try to asap. A Planet CCRMA fellow dweller just posted some very
> > > > rough comparison tests between several kernels and 2.6.10 was doing
> > > > quite well. The 0.7.33-04 DESKTOP_PREEMPT was doing much better but was
> > > > also less stable (but he was testing it with extremely low buffer
> > > > sizes). 
> > > 
> > > This was on the CCRMA list?  Got a URL?
> > 
> > http://ccrma-mail.stanford.edu/pipermail/planetccrma/2004-December/007341.html
> > http://ccrma-mail.stanford.edu/pipermail/planetccrma/2004-December/007343.html
> 
> >From the above post:
> 
>   Currently I think that the most usable system is 
>   2.6.10 (that is if you are willing to run all of your audio software as root, 
>   which is not a good idea as a bad bug could bring your system to its knees)
> 
> This user like many others is confusing the realtime preempt patches
> with the realtime LSM.  You should point this out (I am not on the CCRMA
> list).  The current version of the realtime LSM kernel patch applies
> cleanly against 2.6.10.

I guess he was referring to the kernel he built (without the
realtime-lsm). I'll clarify this point in the Planet CCRMA list...

I just booted into 2.6.10 + realtime-lsm, not bad at all in some very
informal jack tests (run jack at 2x128 + ardour + hydrogen + freqtweak).
I'll leave a full build chugging along all night long, should have fresh
packages to test/release tomorrow :-)

-- Fernando