<div class="gmail_quote">On Fri, Sep 14, 2012 at 6:17 PM, Matthew Knepley <span dir="ltr"><<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>Unless I am reading this wrong, you have a bizarre coarse grid solver. It should be redundant LU but instead</div>
<div>you have GMRES/BJacobi?</div></blockquote></div><br><div>That is Mark's default. The proper coarse grid solve ends up being pretty expensive. Mark set the GAMG default to just do bjacobi because it was scaling better in practice. I don't know where this GMRES is coming from because it doesn't show up in my tests with 3.3.</div>