<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 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 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 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 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 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>