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Re: Octave 3.3.54 snapshot available for ftp


From: Fredrik Lingvall
Subject: Re: Octave 3.3.54 snapshot available for ftp
Date: Tue, 23 Nov 2010 17:29:24 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101105 Lightning/1.0b3pre Thunderbird/3.1.6

On 11/23/10 09:46, John W. Eaton wrote:
> I don't see this problem.  Building with --enable-64 works for me on a
> Debian AMD64 system.
>
> Maybe it is related to this reported bug:
>
>   https://savannah.gnu.org/bugs/?31734
>
> ?  I have not investigated the problem.  I don't really understand the
> sparse matrix code in Octave very well.
>
> If you run
>
>   ../../run-octave -f -q -H -p . --eval "sparseimages ('spchol', 'eps');"
>
> separate from make, does it crash?  What if you try
>
>   ../../run-octave -g -f -q -H -p . --eval "sparseimages ('spchol', 'eps');"
>
> That should run the same command but with Octave executing under gdb.
> Then you could get a backtrace that might give some clues about the
> crash.
>
> jwe
Yes this pinned it down a bit. The LAPACK routine DPOTRF (Cholesky
factorization of a real symmetric positive definite matrix) is called in
the wrong way (or is compiled in the wrong way):

<snip>

 --doc-cache-file=/root/software/octave/hg/octave/doc/interpreter/doc-cache
--info-file=/root/software/octave/hg/octave/doc/interpreter/octave.info
-f -q -H -p . --eval sparseimages\ \(\'spchol\',\ \'eps\'\)\;
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffe9b88710 (LWP 1643)]
[New Thread 0x7fffe71a4710 (LWP 1644)]
[New Thread 0x7fffe69a3710 (LWP 1645)]
 ** On entry to DPOTRF parameter number  4 had an illegal value
[Thread 0x7fffe9b88710 (LWP 1643) exited]
[Thread 0x7fffe71a4710 (LWP 1644) exited]
[Thread 0x7fffe69a3710 (LWP 1645) exited]

Program exited normally.
(gdb)

I have this function in Goto blas:

fl-mac lib # nm libgoto2_nehalemp-r1.13.so | grep dpotrf
0000000000069d70 T dpotrf_

which is configured with:

TARGET = NEHALEM
BINARY=64
NUM_THREADS = 2
INTERFACE64 = 1

/Fredrik









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