On Mon, Apr 13, 2009 at 10:50 PM, Wee-Beng TAY <zonexo at gmail.com> wrote:
> Hi, > > In the past, I did not use ghost cells. Hence, for e.g., on a grid 8x8, I > can divide into 8x2 each for 4 processors i.e. divide the y direction > because in my computation, usually y no. of cells > x no. of cells. this > will minimize the exchange of values. > > Now, with ghost cells, it has changed from x,y=1 to 8 to 0 to 9, i.e., the > grid is now 10x10 hence to divide to 4 processors, it will not be an integer > because 10/4 is not an interger. I'm thinking of using 6x6 grid, and > including ghost cells becomes 8x8. Is this the right/best way? > > Thank you very much and have a nice day! Usually it is not crucial to divide the grid into exactly equal parts since the number of elements is large. Matt > > Yours sincerely, > > Wee-Beng Tay > -- 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20090414/2de7167f/attachment.htm>
