Are your matrices dense? Peter G. Raeth, Ph.D. Senior Staff Scientist Signal and Image Processing High Performance Technologies, Inc 937-904-5147 praeth at hpti.com<mailto:praeth at hpti.com> ________________________________ From: petsc-users-bounces at mcs.anl.gov [petsc-users-bounces at mcs.anl.gov] on behalf of RenZhengYong [[email protected]] Sent: Thursday, January 06, 2011 1:18 PM To: PETSc users list Subject: Re: [petsc-users] PETSc and dense matrices
Hi, Hamid, I am also using BEM to solve 3D EM problems. But I only am using the PETSc on one machine. Kind regards, Zhengyong On Thu, Jan 6, 2011 at 6:46 PM, Hamid M. <spam.wax at gmail.com<mailto:spam.wax at gmail.com>> wrote: Hello, In our research, we solve the diffusion equation PDE using Boundary Element Method (BEM). I am trying to parallelize the code we already have and I was wondering if PETSc is the right tool for us. As you know, BEM produces a dense LHS matrix that needs to be solved. Also due to the size of our problems, populating the entities of the LHS matrix needs to be done on different processes as it won't fit on a single process of our cluster. So I was wondering if you guys can answer my questions: 1- Can I use PETSc to build/populate my LHS matrix on different nodes of a cluster (as opposed to constructing it on a single node and then distributing it) ? 2- Are there optimized parallel solvers for dense matrices in PETSc ? 3- If the answer to question 1 is 'No', can I build my LHS matrix independent of PETSc and then direct PETSc to solve it for me ? thanks in advance, Hamid -- Zhengyong Ren AUG Group, Institute of Geophysics Department of Geosciences, ETH Zurich NO H 47 Sonneggstrasse 5 CH-8092, Z?rich, Switzerland Tel: +41 44 633 37561 e-mail: zhengyong.ren at aug.ig.erdw.ethz.ch<mailto:zhengyong.ren at aug.ig.erdw.ethz.ch> Gmail: renzhengyong at gmail.com<mailto:renzhengyong at gmail.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20110106/879ccb3d/attachment.htm>
