ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Wed, 16 May 2012 23:43:44 +0200having trouble with multi core support on 64bit Sage 4.8 on an Ubuntu 10 guest under VMWare Workstation 7https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/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.
DougWed, 16 May 2012 22:33:34 +0200https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/Answer by Dug_the_Math_Guy for <p>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</p>
https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?answer=13578#post-id-13578here's the link to the new question I raised:
[http://ask.sagemath.org/question/1420/r-through-sage-giving-errors-error-object-sage3](http://ask.sagemath.org/question/1420/r-through-sage-giving-errors-error-object-sage3)Wed, 16 May 2012 23:30:14 +0200https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?answer=13578#post-id-13578Answer by Dug_the_Math_Guy for <p>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</p>
https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?answer=13577#post-id-13577OK, 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.Wed, 16 May 2012 23:15:54 +0200https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?answer=13577#post-id-13577Comment by kcrisman for <p>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.</p>
https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?comment=19785#post-id-19785Probably you should have just edited your original question. But it's okay! Can we close this one?Wed, 16 May 2012 23:43:44 +0200https://ask.sagemath.org/question/8974/having-trouble-with-multi-core-support-on-64bit-sage-48-on-an-ubuntu-10-guest-under-vmware-workstation-7/?comment=19785#post-id-19785