Hi,
I run my code on 1, 2 and 3 procs. KSP is used to solve the Poisson eqn.
Using MatView and VecView, I found that my LHS matrix and RHS vec are
the same for 1,2 and 3 procs.
However, my pressure (ans) output is the almost the same (due to
truncation err) for 1,2 procs.
But for 3 procs, the output is the same as for the 1,2 procs for all
values except:
1. the last few values for procs 0
2. the first and last few values for procs 1 and 2.
Shouldn't the output be the same when the LHS matrix and RHS vec are the
same? How can I debug to find the err?
--
Thank you
Yours sincerely,
TAY wee-beng
