On Sun, Nov 23, 2014 at 4:12 PM, Barry Smith <[email protected]> wrote:
> Performance for the various orderings can be slightly "counter" intuitive > if all you count is flops Yes. As you pointed, there are more variables to analyze besides flops. Did you run with the default PETSc Cholesky? I'd be interested in seeing > how long that takes. I've just run with the default cholesky, it took about 30 min for executing (See attached). A brief summary: MatCholFctrSym 1 1.0 1.0375e+03 1.0 0.00e+00 0.0 0.0e+00 0.0e+00 0.0e+00 65 0 0 0 0 65 0 0 0 0 0 MatCholFctrNum 1 1.0 5.4339e+02 1.0 1.00e+06 1.0 0.0e+00 0.0e+00 0.0e+00 34 0 0 0 0 34 0 0 0 0 0 PCSetUp 1 1.0 1.5810e+03 1.0 1.00e+06 1.0 0.0e+00 0.0e+00 0.0e+00 99 0 0 0 0 99 0 0 0 0 0 The symbolic and numeric Cholesky factorization are taking too long. Victor
petsc_natural.dat
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