Mark Adams <[email protected]> writes:

On Wed, Oct 22, 2014 at 2:25 AM, Jed Brown <[email protected]> wrote:

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Barry Smith <[email protected]> writes:

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Jed

There are some additional issues when the GMRES runs for zero iterations in computing eigenvalues for Cheby.

Hmm, what is right? Suggest that the user set -ksp_chebyshev_estimate_eigenvalues_random? Automatically fall back to that?

Are you implying that PETSc is using the RHS to compute the spectra for cheby?

That is the default, yes.