Performance of MatMatSolve

[David Fuentes]

The majority of time in my code is spent in the MatMatSolve. 
I'm running MatMatSolve in parallel using Mumps as the factored matrix.
Using top, I've noticed that during the MatMatSolve
the majority of the load seems to be on the root process.
Is this expected? Or do I most likely have a problem 
with the matrices that I'm passing in?



thank you,
David Fuentes