Hi,<br><br>I have a question about the Sparse Matrix Factorization fill. <br>Following the manual, I use the option "-info" and get the following result:<br><br>[0] MatLUFactorSymbolic_SeqAIJ(): Reallocs 0 Fill ratio:given 5 needed 5.0746e-05<br>
[0] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 5.0746e-05 or use<br>[0] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,5.0746e-05);<br><br>What's the numbers mean in "Reallocs 0 Fill ratio:given 5 needed 5.0746e-05"? <br>
Does the " Run with -pc_factor_fill 5.0746e-05 or use" mean that I should run my code with option " -pc_factor_fill 5.0746e-05"?<br><br>But when I run my code with option "-snes_view", I get "factor fill ratio given 5, needed 3.28701". <br>
So what should I give to the option "-pc_factor_fill", 3.28701 or 5.0746e-05? Thanks.<br><br>Best,<br>Rongliang<br>