Separate Focus HTML for Basic Foil 6 Load Imbalance arises after i iterations over columns:

Basic HTML version of Foils prepared October 1995

Foil 6 Load Imbalance arises after i iterations over columns:

From Intro HPF September 27, 1995 CPS615 Basic Simulation Track for Computational Science -- Fall Semester 95. by Tom Haupt and Nancy McCracken

1	Many processors are completely idle, while the last column of processors still has the same running time.
2	Better Decomposition is Block by Rows: After iterating over i columns, each processor is still working on n-i+1 row elements. Better load balance and better running time, as time of longest running processor is reduced each iteration.