Hello,
I'm trying to use Petsc to solve a linear system in an application. I'm
using the coordinate format to define the matrix and the vector (it
should work better on GPU but at the moment every test is on CPU). After
the call to VecSetValuesCOO, I've noticed that the vector is storing the
data in a different way from my application. For example with two
processes in the application
process 0 owns cells 2, 3, 4
process 1 owns cells 0, 1, 5
But in the vector data structure of Petsc
process 0 owns cells 0, 1, 2
process 1 owns cells 3, 4, 5
This is in principle not a big issue, but after solving the linear
system I get the solution vector x and I want to get the values in the
correct processes. Is there a way to get vector values from other
processes or to get a mapping so that I can do it myself?
Cheers,
Enrico Degregori
