<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br class="webkit-block-placeholder"></div> PCFactorSetFill() after calling KSPSetPC()<div><br class="webkit-block-placeholder"></div><div> Barry</div><div><br class="webkit-block-placeholder"></div><div> If you are using multiple different KSP's you might look at KSPSetOptionsPrefix()</div><div>to allow using command line options to set different values for different solvers.</div><div><br><div><div>On Nov 22, 2007, at 5:46 AM, Waad Subber wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Hello PETSc Users,<br><br>I have a serial code to solve multiple matrices. I am using LU factorization. When I run the code with the (-info) option, it gives me different values for (pc_factor_fill) depending on the input matrix. I am wondering if I can set these values for the (pc_factor_fill) inside the code instead of running it with runtime option, for it is one code with multiple inputs.<br> <br> Thanks a lot<br> <br> Waad<br><br><br>For Matrix No.1<br><br>[5] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 2.96<br>[5] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 2.96 or use<br>[5] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,2.96);<br>[5] MatLUFactorSymbolic_SeqAIJ(): for best performance.<br><br>For Matrix No.2<br><br>[9] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 2.42069<br>[9] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 2.42069 or use<br>[9] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,2.42069);<br>[9] MatLUFactorSymbolic_SeqAIJ(): for best performance.<br><br>For Matrix No. n<br><br>[8] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 1.87742<br>[8] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 1.87742 or use<br>[8] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,1.87742);<br>[8] MatLUFactorSymbolic_SeqAIJ(): for best performance.<br><div> <br class="webkit-block-placeholder"></div><hr size="1">Be a better sports nut! Let your teams follow you with Yahoo Mobile. <a href="http://us.rd.yahoo.com/evt=51731/*http://mobile.yahoo.com/sports;_ylt=At9_qDKvtAbMuh1G1SQtBI7ntAcJ ">Try it now.</a></blockquote></div><br></div></body></html>