pc_factor_fill

[Waad Subber]

Hello PETSc Users,

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.
 
 Thanks a lot
 
 Waad


For Matrix No.1

[5] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 2.96
[5] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 2.96 or use
[5] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,2.96);
[5] MatLUFactorSymbolic_SeqAIJ(): for best performance.

For Matrix No.2

[9] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 2.42069
[9] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 2.42069 or use
[9] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,2.42069);
[9] MatLUFactorSymbolic_SeqAIJ(): for best performance.

For Matrix No. n

[8] MatLUFactorSymbolic_SeqAIJ(): Reallocs 3 Fill ratio:given 0 needed 1.87742
[8] MatLUFactorSymbolic_SeqAIJ(): Run with -pc_factor_fill 1.87742 or use
[8] MatLUFactorSymbolic_SeqAIJ(): PCFactorSetFill(pc,1.87742);
[8] MatLUFactorSymbolic_SeqAIJ(): for best performance.

       
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