Your message dated Mon, 14 Feb 2011 23:34:50 +0100
with message-id <[email protected]>
and subject line Re: Buggy & inefficient on Athlon
has caused the Debian Bug report #492785,
regarding libatlas3gf-base: Buggy & inefficient on Athlon
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [email protected]
immediately.)
--
492785: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=492785
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: libatlas3gf-base
Version: 3.6.0-21.5
Severity: normal
Randomly unstable results of SVD and slower then blas.
An excerpt from a thread
https://www.cae.wisc.edu/pipermail/bug-octave/2008-July/006403.html
Reproducible with 3.0.1 on debian lenny amd32
- octave3.0 1:3.0.1-4
liblapack.so.3gf => /usr/lib/atlas/liblapack.so.3gf (0xb638f000)
libblas.so.3gf => /usr/lib/atlas/libblas.so.3gf (0xb6013000)
- libatlas3gf-base 3.6.0-21.5
This error disappears when I run with libraries provided by:
libblas3gf 1.2-1.6
liblapack3gf 3.1.1-0.5
LD_PRELOAD=/usr/lib/libblas.so.3gf.0:/usr/lib/liblapack.so.3gf.0 \
/usr/bin/octave-3.0.1
I found an anothor issue - inefficiency of debian's atlas on my Athlon XP
1600+:
A=rand(200,40)+1i*rand(200,40); b=rand(200,1);
t0=cputime;
x0=A\b;for iter=1:1000, x=A\b; err(iter)=norm(x0-x,Inf); end;
sum(err~=0),cputime-t0
atlas ~10.5 seconds
blas+lapack ~9.2 seconds
-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (991, 'testing'), (50, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.22-3-k7 (SMP w/1 CPU core)
Locale: LANG=pl_PL, LC_CTYPE=pl_PL (charmap=ISO-8859-2) (ignored: LC_ALL set to
pl_PL)
Shell: /bin/sh linked to /bin/bash
Versions of packages libatlas3gf-base depends on:
ii libc6 2.7-10 GNU C Library: Shared libraries
ii libgcc1 1:4.3.1-2 GCC support library
ii libgfortran3 4.3.1-2 Runtime library for GNU Fortran ap
libatlas3gf-base recommends no packages.
Versions of packages libatlas3gf-base suggests:
pn libatlas3gf-3dnow <none> (no description available)
pn libatlas3gf-sse <none> (no description available)
pn libatlas3gf-sse2 <none> (no description available)
ii libblas3gf 1.2-1.6 Basic Linear Algebra Subroutines 3
ii liblapack3gf 3.1.1-0.5 library of linear algebra routines
-- no debconf information
--- End Message ---
--- Begin Message ---
Hello
Please note that all CPUs extensions are disabled with the base package.
You should build the custom package to achieve best performances. See:
/usr/share/doc/libatlas3gf-base/README.Debian.gz
Thanks
S
--- End Message ---
