On Fri, Apr 15, 2011 at 5:51 AM, Thomas Witkowski <span dir="ltr"><<a href="mailto:thomas.witkowski@tu-dresden.de">thomas.witkowski@tu-dresden.de</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;">
Jed Brown wrote:<div class="im"><br>
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On Fri, Apr 15, 2011 at 12:06, Thomas Witkowski <<a href="mailto:thomas.witkowski@tu-dresden.de" target="_blank">thomas.witkowski@tu-dresden.de</a> <mailto:<a href="mailto:thomas.witkowski@tu-dresden.de" target="_blank">thomas.witkowski@tu-dresden.de</a>>> wrote:<br>
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Which package must be installed to make use of "ml" (algebraic<br>
multigrid?) as a preconditioner?<br>
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ML, --download-ml<br>
also -pc_type hypre (BoomerAMG is default) from, you guessed it, Hypre, --download-hypre<br>
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But it works with MatAIJ with MatSetBlockSize(x). What is the difference between using MatBAIJ and MatAIJ with setting the block size directly?<br>
</blockquote></div><br>BAIJ changes the internal storage format to make things run faster. ML does not handle this.<div><br></div><div> Matt<br clear="all"><br>-- <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>
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