KSP solver efficiency

[Yixun Liu]

Hi,
Assume  Ku=F is  a linear system assembled from element stiffness
matrix. I want to use KSP to solve Ku=F. Assume the size of K is 100x100
and the number of processors is 4.
The question is does the efficiency of KSP depend on the structure of K?
For example if each process owns 25 rows does the efficiency of the
solver depend on the structure of K?

Thanks.

Yixun