Yes, I got the right Vector local size using the code below and I am also
sure all processes entered that function by printing out a message, which
shows up the number of processes times.
But the hanging problem is still there. I need to spend more time and do
more tests.
int vec_local_size;
// vec
Yes, it seems the global_vec has some problems. It is passed by as a
function parameter. And the original vector is declared as in the code.
However, I got some print-out as below, while I am expecting to get
evenly-distributed values.
process 0 has 5422 entries.
process 1 has 0 entries.
process 2
Where does global_vec come from, and are you sure that all MPI processes
that share global_vec enter this code region?
> On Dec 8, 2024, at 4:52 PM, Qiyue Lu wrote:
>
> Thank you all for the reply. Here is the code. Since I need to fetch data
> from the local_vec, so I set the type as VE
Thank you all for the reply. Here is the code. Since I need to fetch data
from the local_vec, so I set the type as VECSEQ, so I can use
VecGetValues().
std::vector> vc(numNodesSurface, std::vector(numDimsProb)); // 2-D matrix storing velocity u, v.
PetscScalar *ptr_vc = NULL; // memory storing the
You can scatter from a global vector to a local vector; numerous PETSc
examples demonstrate this. So hanging here is surprising. Please display the
entire code so we can see the context of the VecScatterCreate() usage. Perhaps
not all the MPI process that are in the global_vec communicator a
You want to look at example codes and docs (
https://urldefense.us/v3/__https://petsc.org/release/manualpages/PetscSF/VecScatterCreate/__;!!G_uCfscf7eWS!ZfPM2-JGiNd8Yo2xIkHZlQtcjvcJFjXXbMbQPIZ3C5d-RVC-yfvFjoiEm5yaWLcKxfLTPhKkdLX9BM2atRAJ6eg$
) but I am
guessing global_vec and local_vec do not have
Hello,
I am trying to fetch 12 entries from a distributed vector global_vec and
put them into a local vector on each process.
IS is_source, is_dest;
ISCreateGeneral(PETSC_COMM_SELF, 12, idx_global, PETSC_COPY_VALUES, &
is_source);
ISCreateGeneral(PETSC_COMM_SELF, 12, idx_local, PETSC_COPY_VALUES,
