Thanks Paul! this only work for sequential cases, right? in this case, what performance benefit should I expect compared to a fully CPU-based version, if any? is anything available also for parallel runs?
Andrea On Mon, May 6, 2013 at 5:48 PM, Paul Mullowney <paulm at txcorp.com> wrote: > Hi Andrea, > > The matrix type, aijcusparse has an ILU(n) (and ICC(n) for symmetric > problems) preconditioner. The factorization is done on the CPU. The solves > are done on the GPU via the cusparse library. > > In the configure, do --download-txpetscgpu=yes > > I would also look at: > > > http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/Mat/MATSEQAIJCUSPARSE.html > > for information on the aijcusparse class. > > -Paul > > > On Sun, May 5, 2013 at 4:26 PM, Andrea Lani <andrea.lani at gmail.com>wrote: > >> Thanks, Matt! Let me re-iterate on the question... are there other >> available preconditioners already ported to GPU, which are not based on AMG >> (which is typically not suitable for my convection-dominated CFD problems) >> and apart from BICGSTABCUSP? >> > > I believe that the txpetscgpu package has triangular solves for the GPU. > > BiCGStab is a Krylov method. > > Matt > > >> Andrea >> >> >> On May 5, 2013, at 9:53 PM, Matthew Knepley <knepley at gmail.com> wrote: >> >> On Sun, May 5, 2013 at 2:48 PM, Andrea Lani <andrea.lani at >> gmail.com>wrote: >> >>> Dear Developers, >>> >>> Could you please tell me the list of preconditioners for non-symmetric >>> systems fully ported to multi-GPU and available in the current development >>> version? >>> >> >> In my opinion, there are no truly multi-GPU preconditioners anywhere. >> We can imagine them, like AMG with Chebychev smoothers, but >> I have not really seen any of them reliably work. The CUSP SA-AMG is the >> closest one in this category, and Steve Dalton is working on >> it this summer at ANL. >> >> Matt >> >> >>> Thanks in advance >>> >>> Andrea >> >> >> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> >> > > > -- > What most experimenters take for granted before they begin their > experiments is infinitely more interesting than any results to which their > experiments lead. > -- Norbert Wiener > > > -- Dr. Andrea Lani Senior Research Engineer, PhD Aeronautics & Aerospace dept., CFD group Von Karman Institute for Fluid Dynamics Chausse de Waterloo 72, B-1640, Rhode-Saint-Genese, Belgium fax : +32-2-3599600 work : +32-2-3599769 * lani at vki.ac.be* -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20130506/52685fe3/attachment.html>
