[Numpy-discussion] large memory address space on Mac OS X (intel)

David Douard david.douard@logilab...
Fri Feb 2 03:56:12 CST 2007


On Thu, Feb 01, 2007 at 01:33:23PM -0600, Louis Wicker wrote:
> Dear list:
Hi,

may I suggest you to read this?

http://orange.blender.org/blog/stupid-memory-problems

It worth a read.

David


> 
> I cannot seem to figure how to create arrays > 2 GB on a Mac Pro  
> (using Intel chip and Tiger, 4.8).  I have hand compiled both Python  
> 2.5 and numpy 1.0.1, and cannot make arrays bigger than 2 GB.  I also  
> run out of space if I try and 3-6 several arrays of 1000 mb or so  
> (the mem-alloc failure does not seem consistent, depends on whether I  
> am creating them with a "numpy.ones()" call, or creating them on the  
> fly by doing math with the other arrays "e.g., c  = 4.3*a + 3.1*b").
> 
> Is this a numpy issue, or a Python 2.5 issue for the Mac?  I have  
> tried this on the SGI Altix, and this works fine.
> 
> If there is a compile flag to turn on 64 bit support in the Mac  
> compile, I would be glad to find out about it.  Or do I have to wait  
> for Leopard?
> 
> Thanks.
> 
> Lou Wicker
> 
> ------------------------------------------------------------------------ 
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> | Dr. Louis J. Wicker
> | NSSL/WRDD
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-- 
David Douard                             LOGILAB, Paris (France)
Formations Python, Zope, Plone, Debian : http://www.logilab.fr/formations
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