[PD] crazy weird stuff happening.
derek at x-i.net
Mon Nov 1 01:38:03 CET 2004
don't lose the faith! There's an explaination for everything!
Tom Dunstan wrote:
> i just discovered little problem that i cannot figure out at all.
> it runs fine for about 20 minutes
> then all of a sudden the whole system goes into a melt down.
> p4 2.6 (800fsb)
OK. Since you are running Linux on a Pentium 4, I wouldn't rule out the
possibility that this is a denormal numbers related problem. Usually,
however, you see a huge spike in CPU usage with this, however...
Try running your patch on another CPU, OS or both. Does it run fine on
OSX? What about with Linux on an Athlon? How about windoze?
Search the PD list archives for more on denormals, but basically the
solution that is offered by other listers is to check out the CVS
version of 0.37 or 0.37_devel and configure it with
You'll also need to do this with every external. These two config
options, IIRC, insert the following flags into the makefile, which you
will need to use with all your externals:
[correct me here, gang!]
Tim Blechmann has done some work with P4 optimizations by setting a
Float To Zero switch in the devel branch. I didn't have any luck with
it, but my P4 is too old to support this switch...
Another suggestion which came my way was to use something like
KCacheGrind to find out what is eating up all your memory or CPU cycles.
KCachegrind uses Calltree, and is part of KDE 3.3 (package kdesdk). See:
This will also help you figure out if you are simply running out of RAM,
as Andy suggests ;-)
Tim Blechmann wrote:
> thomas musil told me about the approach he used ... adding noise~ *~1e-14 to every feedback loop, filter ...
derek holzer ::: http://www.umatic.nl
---Oblique Strategy # 200:
"How would you explain this to your parents?"
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