On Sun, Dec 11, 2011 at 12:05 AM, Xiangdong Liang <span dir="ltr"><<a href="mailto:xdliang@gmail.com">xdliang@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello PETSc team,<br>
<br>
I was using PaStiX within petsc 3.1-p8. Today, I am trying PaStiX<br>
within petsc-dev. However, For the same code, solving the same linear<br>
system takes longer time (120s vs 90s) in petsc-dev. Both are compiled<br>
with debugging mode off. Is it possible that the newer PaStiX is<br>
slower than old version? or due to some options in compiling?<br></blockquote><div><br></div><div>It is likely the options are not exactly the same, meaning the ordering is different,</div><div>etc. Did you check everything wiht -ksp_view and -ksp_monitor?</div>
<div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Best,<br>
Xiangdong<br>
<br>
PS. I cannot use PaStiX in 3.2 because in the runtime, PaStiX crashed<br>
due to missing of the option -DWITHSCOTCH during compiling. It was<br>
reported before by one user and fixed in petsc-dev, but not in<br>
petsc-3.2-p5.<br>
<br>
<a href="http://lists.mcs.anl.gov/pipermail/petsc-users/2011-March/008356.html" target="_blank">http://lists.mcs.anl.gov/pipermail/petsc-users/2011-March/008356.html</a><br>
</blockquote></div><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener<br>