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having trouble with multi core support on 64bit Sage 4.8 on an Ubuntu 10 guest under VMWare Workstation 7

asked 2012-05-16 15:33:34 -0500

Dug_the_Math_Guy gravatar image

updated 2016-07-05 15:01:25 -0500

FrédéricC gravatar image

Hi Sage people, I installed Ubuntu 10.04 LTS desktop as a guest virtual machine under WIndows 7 as host on a 64-bit quad core with a Sandy Bridge i7 CPU. Like VMWare suggests I choose the number of processors as 4 when I set up the virtual machine ( it actually has 4 physical processors but they use hyper threading so it has 8 logical processors ) Everything has run fine so far but when I set up Sage 4.8 from a binary installation, I get errors like this: Error: object 'sage2' not found except the number after sage varies ( I believe it goes from 0 to 3 ) These errors seem to happen when I try to access R through Sage notebooks, I'm not positive they are limited to this context. I am new to Sage but as far as I can tell this means it is having trouble supporting the multiple cores. There should be objects sage0,sage1,sage2,sage3 that run on different cores? Am I right so far? If so, does anybody know why I am having issues like this? Is it possible I installed it wrong? Or is it more of an issue of Sage running under a VMWare Workstation VM? Any thoughts would help. Doug

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answered 2012-05-16 16:15:54 -0500

Dug_the_Math_Guy gravatar image

OK, it looks like everything I thought was wrong. I am having the same problem running R through Sage with another computer that has a single processor, 32 bits and is running Ubuntu 12 without a virtual machine. So now its a completely different question and it appears to have to do with the Sage - R interface ( although I could be completely wrong again ). I think it makes sense to start a new question since the title to this one is completely irrelevant and misleading now. Hope that's not violating any principles of this forum.

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Probably you should have just edited your original question. But it's okay! Can we close this one?

kcrisman gravatar imagekcrisman ( 2012-05-16 16:43:44 -0500 )edit

answered 2012-05-16 16:30:14 -0500

Dug_the_Math_Guy gravatar image
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Asked: 2012-05-16 15:33:34 -0500

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Last updated: May 16 '12