Bug#344281: [Pkg-octave-devel] Bug#344281: panic: Illegal instruction in det(eye(x))

[Douglas Bates]

It's dying in an Atlas call to a relatively simple routine (idamax). 
Because it gives an illegal instruction error my guess is that it is
picking up the wrong version of the Atlas libraries.  The Atlas
libraries are specific to the particular processor being used.  You
could try installing one of

atlas3-3dnow
atlas3-sse2
atlas3-sse

according to the type of processor you are running.  I believe these
can all coexist on the same system and the installation process sets
up a local map to the optimal version but I'm not sure about that. 
Camm?

On 12/22/05, Joshua N Pritikin <jpritikin at pobox.com> wrote:
> On Thu, Dec 22, 2005 at 09:11:44AM -0600, Douglas Bates wrote:
> > On 12/21/05, Dirk Eddelbuettel <edd at debian.org> wrote:
> > > | I tried to octave2.1 also, det(eye(9)) gives a panic: Illegal
> > > | instruction.  det(eye(4)), 5, 6, 7, 8 works though.  It's a mystery.
> > >
> > > I very vaguely recall a bug report with respect to Lapack that came up in R
> > > that was triggered by one matrix size only. If memory serves, it was 9 as
> > > well. This is the reason we build R with its own copy of Lapack.
> > >
> > > I cannot recall what the exact circumstances were, but maybe Doug or Brian
> > > (CC'ed) can remember ?
> >
> > I believe that bug was in an eigenvalue-eigenvector calculation.  I
> > imagine this calculation is done using an LU decomposition or, if the
> > matrix is recognized as being symmetric, a Bunch-Kaufman
> > decomposition.
> >
> > Can you create a traceback to show where it is generating the illegal
> > instruction?
>
> Does the follow provide enough detail or should I recompile with -g?
>
> Program received signal SIGILL, Illegal instruction.
> [Switching to Thread -1240947008 (LWP 9259)]
> 0xb670b656 in ATL_diamax_xp1yp0aXbX () from /usr/lib/atlas/libblas.so.3
> (gdb) where
> #0  0xb670b656 in ATL_diamax_xp1yp0aXbX () from
> /usr/lib/atlas/libblas.so.3
> #1  0xb68f33a8 in ?? () from /usr/lib/atlas/libblas.so.3
> #2  0x00000009 in ?? ()
> #3  0x08f508c8 in ?? ()
> #4  0xb670b4a5 in ATL_idamax () from /usr/lib/atlas/libblas.so.3
> #5  0x00000009 in ?? ()
> #6  0x08f508c8 in ?? ()
> #7  0x00000001 in ?? ()
> #8  0x00000009 in ?? ()
> #9  0xb670b440 in ATL_dgpr1U_a1_x1_yX () from
> /usr/lib/atlas/libblas.so.3
> #10 0xb6e3d578 in ?? () from /usr/lib/atlas/liblapack.so.3
> #11 0x08f508c8 in ?? ()
> #12 0xb6932c8c in cblas_idamax () from /usr/lib/atlas/liblapack.so.3
> #13 0x00000009 in ?? ()
> #14 0x08f508c8 in ?? ()
> #15 0x00000001 in ?? ()
> #16 0x00000009 in ?? ()
> #17 0xb6932c50 in cblas_icamax () from /usr/lib/atlas/liblapack.so.3
> #18 0xb6e3d578 in ?? () from /usr/lib/atlas/liblapack.so.3
> #19 0x08f50910 in ?? ()
> #20 0xb6913d43 in ATL_dgetrfC () from /usr/lib/atlas/liblapack.so.3
> #21 0x08f50258 in ?? ()
> #22 0x08f4fe3c in ?? ()
> ---Type <return> to continue, or q <return> to quit---
> #23 0x08f50058 in ?? ()
> #24 0x08f50058 in ?? ()
> #25 0x00000000 in ?? ()
> #26 0x00000000 in ?? ()
> #27 0x08f50058 in ?? ()
> #28 0x08f50058 in ?? ()
> #29 0x08f50258 in ?? ()
> #30 0x08f4fe3c in ?? ()
> #31 0x00000000 in ?? ()
> #32 0x00000009 in ?? ()
> #33 0x08f50258 in ?? ()
> #34 0x08f4fe3c in ?? ()
> #35 0x08f50058 in ?? ()
> #36 0xb6e3d578 in ?? () from /usr/lib/atlas/liblapack.so.3
> #37 0x00000009 in ?? ()
> #38 0x08f4f898 in ?? ()
> #39 0x00000002 in ?? ()
> #40 0xb6913c27 in ATL_dgetrfC () from /usr/lib/atlas/liblapack.so.3
> #41 0x08048430 in ?? ()
> #42 0xb7880b9c in ?? () from /usr/lib/octave-2.9.4/liboctinterp.so
> #43 0x08f50022 in ?? ()
> #44 0x08f50058 in ?? ()
> #45 0x08f50258 in ?? ()
> ---Type <return> to continue, or q <return> to quit---
> #46 0x08f4fe3c in ?? ()
> #47 0xb783775c in ?? () from /usr/lib/octave-2.9.4/liboctinterp.so
> #48 0x0f3a8b99 in ?? ()
> #49 0xb7880b9c in ?? () from /usr/lib/octave-2.9.4/liboctinterp.so
> #50 0x08f4fe3c in ?? ()
> #51 0xb612cc34 in free () from /lib/tls/i686/cmov/libc.so.6
>
>
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