On Mon, Sep 24, 2012 at 9:48 PM, John Mousel <span dir="ltr"><<a href="mailto:john.mousel@gmail.com" target="_blank">john.mousel@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">
<div>I'm having a problem with GAMG causing a MatSetValues() is [some non-zero number] after</div></blockquote><div><br></div><div>I do not see any errors in your output.</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"><div>[0] PCSetUp(): Setting up new PC</div><div><br></div><div> I don't get this with either ILU or HYPRE/BoomerAMG. I've attached the output of -info. I see there is a recent change to some pre-allocation for GAMG here:</div>
<div><br></div><div><a href="http://petsc.cs.iit.edu/petsc/petsc-dev/rev/fe806009181b" target="_blank">http://petsc.cs.iit.edu/petsc/petsc-dev/rev/fe806009181b</a>
</div><div><br></div><div>I'm not sure if that has anything to do with it, but my blocksize is 1. I'm running with the following options.</div><div><br></div><div>-ksp_type bcgsl -pc_type gamg -pc_gamg_threshold 0.01 -mg_levels_ksp_type richardson -mg_levels_pc_type sor -mg_coarse_ksp_type richardson -mg_coarse_pc_type sor -mg_coarse_pc_sor_its 4 -pc_gamg_type agg <div>
-pc_gamg_agg_nsmooths 1 -pc_gamg_sym_graph true -info -ksp_monitor_true_residual</div></div><div><br></div><div>Thanks,</div><div>John</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><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>