[petsc-users] How to choose a suitable restarted m when using GMRES?

w_ang_temp w_ang_temp at 163.com
Sat Nov 24 06:14:51 CST 2012

    As is know, GMRES(m) is a very efficient solver when dealing with symmetric indefinite
system. And the restarted parameter m is critical. When the system is small, I can do
several tests to find a suitable m. But when the system is very large, it is very difficult
to do that. I read lots of papers about GMRES(m) and find that almost none told the way to
get a suitable m. Someone told me that I can just choose the matrix dimension as the m, but
I find that it is not right.
    So, generally, when using GMRES(m) as the sovler, how to use a suitable restarted m?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20121124/46d63fc1/attachment.html>

More information about the petsc-users mailing list