On Thu, Mar 21, 2013 at 12:10 AM, Michael Povolotskyi <mpovolot at purdue.edu>wrote:
> Hello, > I have to perform multiplications of a Hermitian distributed matrix by a > distributed vector. > > Questions: > 1) will setting the MAT_HERMITIAN option save the memory of the matrix > storage? > 2) will it save me time during the multiplication? > No, it only changes default preconditioner settings (like incomplete Cholesky instead of ILU and symmetric ASM instead of RASM). You can explicitly use the SBAIJ format to use a symmetric format (which saves memory, but it is sometimes slower because it has to communicate twice). -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130321/f8dc294a/attachment.html>
