[petsc-dev] Fwd: no petsc on Edison

[Mark Adams]

>
>
>>>
>  MatTransposeMatMult() tends to use much larger ctable than MatMatMult.
> Is your matrix symmetric? If so, MatMatMult() will use smaller ctable and
> require less communication.
>
>
Humm, that is good to know.

How would I add this to GAMG? Does the user tag the matrix as symmetric and
then GAMG checks this, explicitly computes a transpose of P, calls
MatMatMult twice?

Thanks,

Hong
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