[linux-audio-user] 2.6.15.4, realtime-lsm, jackd -R, system performance down!

[Nigel Henry]

On Monday 13 February 2006 22:28, Ismael Valladolid Torres wrote:
> Lee Revell escribe:
> > On Mon, 2006-02-13 at 13:08 +0100, Ismael Valladolid Torres wrote:
> > > fons adriaensen escribe:
> > > > > How much memory does your machine have? Is it swapping when this
> > > > > slowdown occurs?
> > > >
> > > > Good question. This really looks like an 'out of memory' problem.
> > >
> > > Just 160MB but then why does it swap only when jackd is running
> > > realtime?
> >
> > Because jackd only locks all its memory in realtime mode.
>
> Clearly this is my problem. If I tell jackd not to lock memory at all,
> then applications open succesfully even if in realtime mode
> but... xruns are back!
>
> I think I'll try to get more memory. This G3 uses PC100 SDRAM, more
> difficult to find right now even in eBay and at prices like DDR2 new.

Hi Ismael. I've got an old Gateway 500, with a Tabor MOBO. This uses PC100, 
but I had an odd stick of PC133 128MB lying around, and this has been 
detected just fine. It now has 2x64MB sticks of PC100, and the 128MB of 
PC133, and is showing as 256MB. Nigel.
>
> > Try adding this line to /etc/security/limits.conf:
> >
> > *               stack   hard    512
> >
> > then reboot.  This will save you 7.5MB of unswappable memory per thread.
>
> I'll give this a try and tell you all.
>
> Cordially, Ismael