[SciPy-user] linalg.expm() Illegal Instruction Error?
Sat Jun 13 23:46:43 CDT 2009
The situation is a little tricky. I installed numpy 1.3.0 from source
from, I guess, this sourceforge link: http://sourceforge.net/project/downloading.php?group_id=1369&filename=numpy-1.3.0.tar.gz&a=58155458
I should perhaps elaborate. I have a small cluster, on which I have
non-root access. I've installed python 2.5.2, numpy 1.3.0, and scipy
0.7rc1 to ~. ATLAS is already configured on the system, so prior to
installing these packages I set
I'm just aiming to run non-parallel batch jobs on each node of the
cluster. The code works quite happily on a set of newer nodes in this
cluster, but on the older ones we are getting this Illegal instruction
I'm wondering if there's a way to make numpy use, perhaps, an older
version of ATLAS that will be somewhat slower, but will work on all
the nodes. Can ATLAS be installed to ~?
On Jun 13, 2009, at 3:23 PM, Robert Kern wrote:
> On Sat, Jun 13, 2009 at 10:44, Dylan Gorman<firstname.lastname@example.org>
>> Hi Folks,
>> I'm having a bit of a weird problem. linalg.expm() is failing for
>> matrices larger than size (51,51), and reports "Illegal instruction"
>> and forces python to quit. I'm not sure where this is coming from. I
>> created the following routine:
>> for i in range(10,128):
>> A = random.rand(i,i)
>> B = linalg.expm(A)
>> print i
>> which fails with "Illegal instruction" when you get to 51.
> This happens when you use a numpy binary that was compiled to use an
> ATLAS library on a CPU with more advanced SSE instructions than your
> CPU. Exactly which binary did you install (please give a URL)? What is
> your CPU?
> Robert Kern
> "I have come to believe that the whole world is an enigma, a harmless
> enigma that is made terrible by our own mad attempt to interpret it as
> though it had an underlying truth."
> -- Umberto Eco
> SciPy-user mailing list
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