[petsc-users] Help my solver scale

[Mark Adams]

>
>
> KSPSetUp               1 1.0 4.7994e-04 2.3 0.00e+00 0.0 0.0e+00 0.0e+00
> 2.0e+00  0  0  0  0  0   0  0  0  0  0     0
> KSPSolve               1 1.0 2.4850e-03 2.0 5.33e+04 1.0 0.0e+00 0.0e+00
> 2.0e+00  0  7  0  0  0   0  7  0  0  0   343
> PCSetUp                2 1.0 2.2953e-02 1.0 1.33e+04 1.0 0.0e+00 0.0e+00
> 6.0e+00  2  2  0  0  1   2  2  0  0  1     9
> PCApply                1 1.0 1.3151e-03 1.5 0.00e+00 0.0 0.0e+00 0.0e+00
> 0.0e+00  0  0  0  0  0   0  0  0  0  0     0
>

Not following whole thread but these are tiny (fast) problems. The setup is
5x the solve. That is a poor balance that could come from a number of
things, but it looks like you are past strong speedup roll over. Test
larger problems. Try not to go below 5K eqs per process if you expect to
see decent scaling.
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