<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
I have seen similar behavior on my mac (works fine on Linux) -- I
reported this to the mailing list a few weeks back. I eventually
tracked it down to a BLAS issue but gave up on finding the exact
cause as I needed to move on -- moved over to MUMPS. But the
problem is not in your imagination.<br>
<br>
If I have the time, I will try to get back to it (especially since I
finally learned that you have to use dsymutil to get the line
numbers in the debugger/valgrind).<br>
<br>
-sanjay<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 1/28/13 3:09 PM, Jed Brown wrote:<br>
</div>
<blockquote
cite="mid:CAM9tzS==HufkQEo3UOSYn9HweAuh=fk=xhafSZTkavG6vQCVug@mail.gmail.com"
type="cite">
<div dir="ltr">Vague "random answers" isn't very helpful. If there
is a real problem, we'd like a test case so we can track it
down.</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jan 28, 2013 at 3:58 PM, Gaetan
Kenway <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:kenway@utias.utoronto.ca" target="_blank">kenway@utias.utoronto.ca</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi
everyone
<div><br>
</div>
<div>I have the exactly same issue actually. When I updated
to petsc-3.3, SuperLU_dist was giving me random answers to
KSPSolve(). Maybe half of the time you would get the same
result as 3.2, other times it was a little off and other
times widely differnet. I am using SuperLU_dist with a
PREONLY ksp object. </div>
<div><br>
</div>
<div>I haven't tracked down what is causing it and reverted
back to petsc-3.2 that still works. </div>
<div><br>
</div>
<div>Also, to fix the issue with the configure below, just
drop out the download-metis. You need it for 3.3 but not
3.2</div>
<span class="HOEnZb"><font color="#888888">
<div><br>
</div>
</font></span>
<div><span class="HOEnZb"><font color="#888888">Gaetan</font></span>
<div>
<div class="h5"><br>
<br>
<div class="gmail_quote">On Mon, Jan 28, 2013 at 4:42
PM, Jed Brown <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jedbrown@mcs.anl.gov"
target="_blank">jedbrown@mcs.anl.gov</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Send -ksp_monitor_true_residual
-ksp_view output for both cases so we can try to
identify the source of the different convergence
behavior.
<div>
<div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jan 28,
2013 at 3:37 PM, Brian Helenbrook <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:bhelenbr@clarkson.edu"
target="_blank">bhelenbr@clarkson.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">Dear
Petsc-Users-List,<br>
<br>
I recently upgraded to petsc3.3-p5
from petsc3.2-p7 and the results from
my code have changed. I am using
superLU with the following options:<br>
<br>
-ksp_type preonly -pc_type lu
-pc_factor_mat_solver_package
superlu_dist<br>
<br>
Everything was working with petsc3.2
but now I get totally different
answers and the iteration doesn't
converge. My build configuration is<br>
<br>
./config/configure.py
--prefix=${HOME}/Packages
--with-fortran=0
--download-superlu_dist=1 --with-x=0
--download-parmetis=1
--download-metis=1
--with-mpi-dir=${HOME}/Packages
--with-valgrind-dir=${HOME}/Packages<br>
<br>
I am running on OS X 10.8.2 with
openmpi-1.6.3.<br>
<br>
I have run valgrind on my code and it
is clean (except for start-up issues
with mpi which occur before my code is
entered.)<br>
<br>
I'm not very sure how to go about
debugging this. What I've tried is
to re-install pets-3.2-p7, but now I
am having trouble getting that to
build:<br>
<br>
./config/configure.py
--prefix=${HOME}/Packages
--with-fortran=0
--download-superlu_dist=1 --with-x=0
--download-parmetis=1
--download-metis=1
--with-mpi-dir=${HOME}/Packages
--with-valgrind-dir=${HOME}/Packages<br>
===============================================================================<br>
Configuring PETSc to
compile on your system<br>
===============================================================================<br>
===============================================================================<br>
Compiling & installing Metis; this
may take several minutes
===============================================================================
*******************************************************************************<br>
UNABLE to CONFIGURE with
GIVEN OPTIONS (see configure.log
for details):<br>
-------------------------------------------------------------------------------<br>
Error running make on Metis: Could not
execute "cd
/Users/bhelenbr/Packages/petsc-3.2-p7/externalpackages/metis-4.0.3
&& make clean && make
library && make minstall
&& make clean":<br>
<br>
<br>
Any ideas what direction to go with
this?<br>
<br>
Thanks,<br>
<br>
Brian<br>
<br>
<br>
<br>
Brian Helenbrook<br>
Associate Professor<br>
362 CAMP<br>
Mech. and Aero. Eng. Dept.<br>
Clarkson University<br>
Potsdam, NY 13699-5725<br>
<br>
<span>
work: <span title="Call with Google
Voice"><a moz-do-not-send="true"
href="tel:315-268-2204"
value="+13152682204"
target="_blank">315-268-2204</a></span></span><br>
<span>
fax: <span title="Call with Google
Voice"><a moz-do-not-send="true"
href="tel:315-268-6695"
value="+13152686695"
target="_blank">315-268-6695</a></span></span><br>
<br>
<br>
<br>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
</body>
</html>