[linux-audio-user] VST_SERVER and Edirol Hypercanvas?

[Fernando Lopez-Lezcano]

On Thu, 2004-12-02 at 13:05, Machine Has No Agenda wrote:
> On Fri, 2004-12-03 at 07:32, Fernando Lopez-Lezcano wrote:
> > On Thu, 2004-12-02 at 11:25, Machine Has No Agenda wrote:
> > > On Thu, 2004-12-02 at 18:45, Russell Hanaghan wrote:
> > > 
> > > > Hmm...I'm not familiar with what 2.6 voodoo the CCRMA kernel is using. I 
> > > > don;t think it's realtime-lsm though. I think it's Ingo's patches? Maybe 
> > > > the realtime threads or some such thing are causing a problem...
> > > > 
> > > > Any other CCRMA succesful vst users??
> > > 
> > > woohoo!!!! i am now a successful ccrma user of jack_fst!!! i managed to
> > > get it working with wine 20040505 and the ccrma 2.6.8 R9 kernel on my
> > > fedora core 2 box ....
> > > 
> > > the trick was to check the "No Memory Lock" box in qjackctl - now i'm
> > > running crystal synth, pro-52, slayer2, plasticz plus a whole bunch of
> > > others as a normal user ... I CAN'T TELL YOU HOW HAPPY I AM RIGHT NOW!!!
> > > months of work, paid off ....
> > 
> > How much memory do you have in your machine?
> 
> i have 512mb ... and the system never seems to approach using even half
> of that ...

Hmmm, just 256M used seems on the low side. There must be a way to see
how much memory is locked down, that would be a more useful measure of
how close you are to the edge (any gurus out there know of an
incantation to do that?). 

> > The "No Memory Lock" option
> > does just that, the audio application pages are not locked into real
> > memory (your real RAM), meaning they can be swapped out to disk when the
> > system runs out of memory. Which means you can get xruns due to that
> > (imagine: part of the app is on disk and maybe is needed again in memory
> > to run the realtime stuff and that's it, it has to come from disk to
> > memory and that takes a lot of time). 
> > 
> > Maybe you didn't have enough RAM to accomodate all the audio apps and
> > their libraries. Wine or whatever cannot lock down enough memory and it
> > quits. 
> 
> hmmm, i'll test out some vst's other than crystal synth with memory lock
> enabled and see how they go ... as for ram, i don't think my system has
> ever even used the swap partition ...
> 
> unless - and i have no idea here - my system is blocking some libraries
> from accessing ram while realtime caps are enabled?

No, I don't think that would be the case. I suspect the reason is you
don't have enough memory to lock down all the libraries your particular
plugin needs. 

-- Fernando