I am using scalapack's PDGESVD routine. I dont seem to understand the affect of the row and column block size on the output results. Why i say this is due to the fact that i am observing that when i process a 3 x 3 matrix with a MB = NB = 3. I get proper S,U and VT matrices.
But when i run the same program with MB=NB = 2. The last entry in the S matrix is wrong.
It would be of great help some one could tell me whats happening here.
Thanks
-Vikas
The sample input and S matrices are given below:
A:
3 3
1
2
3
4
5
6
7
8
9
Output S matrix:
3 1
0.168481033526142063D+02
0.106836951455470852D+01
0.403135067055869220D-15
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