#11674: np.dot of two numeric matrices segfaults sage.
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Reporter: mister.wardrop | Owner: jason, jkantor
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.7.1
Component: numerical | Keywords: ATLAS segfault matrix numpy
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by leif):
Replying to [comment:15 mister.wardrop]:
> Okay. I cannot get ATLAS to build as part of sage 4.7 compilation on
either the iMac (second to latest generation) or MacBook 5,1 (2008) with
processors of Intel Core i7 Quad-Core (with hyperthreading) and Intel Core
2 Duo P8600 respectively. Interestingly, on the AMD processor, it compiled
quickly, and only later had a fault compiling singular. On the Intel
machines, I was using a 2.6.38 Linux kernel; but the same result was found
while running on a 3.0 kernel.
>
> I cannot really afford to dedicate too much more time to attempting to
get sage working; without sure chance of success.
>
> I think this ATLAS compilation bug has something to do with
http://trac.sagemath.org/sage_trac/ticket/9385 .
You might have to disable CPU throttling, i.e. "power save mode". Also,
ATLAS 3.8.3 doesn't know good parameters for more recent processors (like
those of the Core i7 family), such that it tries more things on these,
making the build take much longer.
I'd also strongly suggest to use the new ATLAS spkg from #10226 (which
provides ATLAS 3.8.'''4''' and also much better build options, please see
the ticket for details).
Unfortunately this spkg won't even get into Sage 4.7.1 (to be released
Monday I think, as we just released rc2).
To use that spkg, simply copy it into `$SAGE_ROOT/spkg/standard/`; Sage
will automatically pick up the most recent one.
> If need be, I am happy to provide ssh access to one of my machines so
that you can poke through what's going on.
Might be an option, but it's perhaps easier if you first try the above,
since disabling the power save mode AFAIK requires root privileges (at
least on some systems)... ;-)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11674#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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