Whether is there a method to repartition the matrix to get the same distribtutions? thanks.
Yujie On Tue, Dec 30, 2008 at 3:17 PM, Barry Smith <bsmith at mcs.anl.gov> wrote: > > They need to have the same distributions. > > Barry > > On Dec 30, 2008, at 5:04 PM, Yujie wrote: > > Dear Barry: >> >> You mean B*A11 works in parallel mode if B and A11 have different >> distribution? Its distribution is decided by the row ownership of B and the >> column ownership of A11? thanks a lot. >> >> Regards, >> >> Yujie >> >> >> On Tue, Dec 30, 2008 at 1:54 PM, Barry Smith <bsmith at mcs.anl.gov> wrote: >> >> On Dec 30, 2008, at 3:27 PM, Yujie wrote: >> >> Dear Barry: >> >> thank you for your reply. MatMatMult() uses Plapcak package for Dense >> matrices? >> >> In the parallel case, for sequential it uses LAPACK >> >> >> In addition, about MatGetSubMatrix() and submatrix multiplcation problems, >> could you give me some advice? >> >> "if the distribution of A11 and B is different, it will not work if I do >> B*A11? if it work, what is the distribution of B*A11?" >> >> >> The row ownership of B and the column ownership of A11 >> >> thanks a lot. Happy holiday:). >> >> Regards, >> >> Yujie >> >> >> >> >> >> On Tue, Dec 30, 2008 at 12:28 PM, Barry Smith <bsmith at mcs.anl.gov> wrote: >> >> In theory it is all there. Just do MatMatMult() with your dense matrices >> >> Barry >> >> >> On Dec 29, 2008, at 1:55 PM, Yujie wrote: >> >> Hi, >> >> I am wondering whether it have been realized in PETSc to do >> MPIDense*MPIDense? thanks a lot. Happy holiday:). >> >> Regards, >> >> Yujie >> >> >> >> >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20081230/070e5695/attachment.htm>
