PETSc/ridgeSim 3D scaling on BG/L

Matthew Knepley knepley at
Sun Apr 2 13:23:31 CDT 2006

Thats awesome. 80% true efficiency for 1K nodes on under
1 million unknowns. Thats only 1,000 unknowns per proc. If
we were cranking the problems size, I am sure you'd be up
in the 90s. Hopefully this summer we can deliver you much
improved serial performance as well. BTW, I want to talk
sometime about the subduction benchmark. Van Keken talked
about it at Purdue, so I got a diametrically opposed viewpoint
from a sympathetic person. It was eye opening.


On 4/2/06, Richard Katz <katz at> wrote:
> Hi All,
> Thought you might be interested to see this.
> The simulation is finite-volume, steady-state, non-Newtonian CFD in 3D.
> And, of course, it is done using PETSc (version 2.3.1).
> How does this compare to other PETSc-based simulations?
> Cheers
> Rich
> Barry -- I had a problem with the the jobs that we discussed but I'm
> hoping to run them properly tonight.

"Failure has a thousand explanations. Success doesn't need one" -- Sir Alec
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