[petsc-dev] strangness in Chebyshev estimate of eigenvalues

[Matthew Knepley]

On Tue, May 17, 2016 at 2:34 PM, Jed Brown <jed at jedbrown.org> wrote:

> Matthew Knepley <knepley at gmail.com> writes:
> > Should we just make this another Random implementation which is only for
> > testing?
>
> The problem is that we want to produce the same numbers on one process
> and on many processes.  The interface doesn't really afford that because
> it provides a stream of numbers.  If we know the number of entries we're
> about to ask for on each process, we could do a Scan to find the
> starting index and "seed" with that, where drawing a number hashes and
> increments the counter.  But this is pretty contorted.
>

It seems like we should do double dispatch for VecSetRandom().

   Matt

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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