<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Tue, Jul 19, 2016 at 8:17 PM, Eduardo Jourdan <span dir="ltr"><<a href="mailto:eduardojourdan92@gmail.com" target="_blank">eduardojourdan92@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div>Hi all,<br><br></div>I would like to perform a specific number (for instance 4 of forward and backward sweeps with a seqaij matrix with block size 4, vectors b and x. Also, I need to do this same procedure with another matrix seqaij block size 16. I would appreciate if someone knows the best way to do it. <br></div></div></div></div></div></blockquote><div><br></div><div>It sounds like you want PCSOR and PCApply, not MatSolve.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>1 - I've been trying to use MatSolve. For the bs=4 it seems to work, but with the other matrix with bs=16 the residue diverges. When I call matConvert to convert the later matrix for a seqbaij with bs=16 the result changes and the linear residue is reduced. It is supposed to happen or it is more possible that i am doing something wrong? <br><br></div>2 - MatSolve for seqbaij and seqaij with the same block sizes gives the same results in terms of solution (not performace, memory) ?<br><br></div>3 - Can do I do a specific number of sweeps as told before with the KSP/PC interface?<br><br></div><div>4 - I saw the manual for the MatSolve and It says that it is for factored matrix. Can I use a matrix just after the MatAssembly calls?<br></div><div><br></div>Best regards,<br><br></div>Eduardo Jourdan<br></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div>
</div></div>