<div dir="ltr"><br><br><div class="gmail_quote"><div dir="ltr">On Mon, Jul 9, 2018 at 10:37 AM Dingwen Tao <<a href="mailto:dingwen.tao@ieee.org">dingwen.tao@ieee.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>All,</div><div><br></div><div>We have some questions related to Algebraic Multigrid (AMG) method with PETSc for solving large-scale systems of linear equations. Anyone with experience can help? </div><div><br></div><div>Questions:</div><div>(1) We know that PETSc can be used with HYPRE AMG preconditioner for solving large-scale linear systems, while HYPRE also has an independent multigrid linear solver as well. Anyone knows which one is more frequently used in today's HPC applications? Or both of them are very commonly used? </div></div></blockquote><div><br></div><div>I'm not sure what you mean either but PETSc has an interface to Hypre/BoomerAMG which is an AMG solver that is used by a lot of applications.</div><div><br></div><div>PETSc has a native AMG solver GAMG. You should start with either one and try both.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>(2) Anyone can give us a real HPC application example that uses PETSc with HYPRE AMG preconditioner or HYPRE multigrid linear solver? We are looking for a real HPC application as our research's motivation. </div></div></blockquote><div><br></div><div>As I said there are lots. Here are two that use PETSc AMG, including hypre and gamg: <a href="https://hbps.pppl.gov/computing/xgc-1">https://hbps.pppl.gov/computing/xgc-1</a> and <a href="https://www.alcf.anl.gov/projects/chombo-crunch-advanced-simulation-subsurface-flow-and-reactive-transport-processes">https://www.alcf.anl.gov/projects/chombo-crunch-advanced-simulation-subsurface-flow-and-reactive-transport-processes</a></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><br></div><div>Many thanks in advance!</div><div><br></div><div>Best regards,</div><div><br></div><div>Dingwen</div><div> <br clear="all"><div><br></div>-- <br><div class="gmail-m_-802218421543868182gmail_signature"><div dir="ltr">Dingwen Tao<div>Assistant Professor<br><div>The University of Alabama</div><div><br></div></div></div></div>
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