<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Mar 26, 2014 at 9:59 AM, TAY wee-beng <span dir="ltr"><<a href="mailto:zonexo@gmail.com" target="_blank">zonexo@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I am running a CFD solver. The Poisson eqn was originally solved using HYPRE's geometric multigrid.<br></blockquote><div><br></div><div>Is this on a structured grid?</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">
Recently, I tested it with Boomeramg as the preconditioner and GMRES as the ksp solver. There's a 20% increase in speed.<br>
<br>
However, when I increased the grid resolution, I got the out of memory error. Changing the solver back to HYPRE solved the problem.<br>
<br>
So does GMRES + Boomeramg used more memory than other solvers? Are there alternatives?<br>
<br>
Thank you.<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Yours sincerely,<br>
<br>
TAY wee-beng<br>
<br>
</font></span></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
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