[petsc-dev] strangness in Chebyshev estimate of eigenvalues

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>   So are you proposing we have three options
>   KSPChebyshevEstEigSetRHSType() with (1) "use give rhs", (2) "use
>   random rhs", (3) "use hash scheme to produce same right hand side
>   independent of number of processes so long as the ordering stays the
>   same" or are you suggesting just bagging the random? 

Bag random for sure.

>   or bagging also the right hand side and always just use the hash
>   scheme? 

I wouldn't have a problem with that.  The only nice thing about using
the RHS is that it doesn't depend on the ordering.

>   By just using the hash scheme we can remove some current code and
>   options which is always a good thing... if they provide no added
>   value then they should be removed.

Yes.
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