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Problems running multiple processor (Logic, Mac)
Last post Wed, Dec 10 2008 by ct1961, 7 replies.
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Posted on Fri, Dec 05 2008 15:48
by Nordkrog
Joined on Sun, Nov 27 2005, Paris, Posts 43
Hi.

I constantly get the famous "CPU overload" message in Logic. But going to the console in MAC OSX shows his detail:
05/12/08 14:34:34 Logic Pro[185] A plug-in seems to cause problems running in Multi Processor (Multi Threading) mode. ("Vienna Instruments")

Anyone knows if VSL's VI has that sort of problem or is Apple just washing their hands...

Posted on Fri, Dec 05 2008 19:06
by serialmusique
Joined on Thu, Jun 08 2006, Santa Monica California, Posts 22

From what I hear, Logic only runs one processor per virtual instrument instance.  If you have a large VE instance with multiple instrumants, you are still limited to one processor for that instance.  It's a big problem with how Logic utilizes multiple cores.  Crappy for sure. 

Posted on Fri, Dec 05 2008 19:57
by Nordkrog
Joined on Sun, Nov 27 2005, Paris, Posts 43
Yes, that's why I only use multiple VI's. Never VE... So I don't think it is related to Logics one processor pr instance limitations.

Posted on Fri, Dec 05 2008 20:58
by ct1961
Joined on Sat, Dec 15 2007, Posts 438

Hi Guys.

I'm running a 16 instrument instance of VE, on a Mac Pro 2.66ghz quad core with Logic 8.0.2, and it is utilising all four cores according to the  meters in Activity Monitor. Nor does it appear to be singling out any particular core for abuse.

Colin

P.S.   OS 10.4.11

Posted on Wed, Dec 10 2008 20:12
by ct1961
Joined on Sat, Dec 15 2007, Posts 438

Hi Guys.

Here's a screenshot of my Activity Monitor showing 138% CPU for 1 instance of Vienna Ensemble. 

As you can see all processors are being utilised pretty evenly and I'm experiencing no spikes. The VE contains 16 VIs and 4 effects on a bus.

System used as above.

Thanks for the help Christian...

Colin

Posted on Wed, Dec 10 2008 20:23
by serialmusique
Joined on Thu, Jun 08 2006, Santa Monica California, Posts 22
Wow! That's pretty cool. Perhaps your OSX version has something to do with it? I'm running Leopard and have never been able to access more than one core per audio instrument instance in Logic 8.
I even get serious one processor spikes when running 1 4 instrument instance of of VE3 over the network. Especially if my latency setting is under 2x (256 in Logic).
I have and 8 core mac pro running 10.5.5. Any suggestions?
Matthew
Posted on Wed, Dec 10 2008 20:37
by ct1961
Joined on Sat, Dec 15 2007, Posts 438

 Hi Matthew.

I'm not very up on the tech side of things so I don't know what to suggest really.  I have my latency set to 512 in Logic and x2 in the VE2 server.

Christian M has mentioned that the OS could be something to do with it, so you could always revert back if you still have 10.4 and give it a run out.  I'm also able to open 4 VEs on my system and though I haven't loaded them all fully it still runs spike-free.

Hope you get a result one way or another.

Colin

P.S. I assume you close as many windows as possible cos they don't half eat up cpu..

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