Studium_Angewandte_Informatik_Bachelor/hpc_laboratory_exercises
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

,

Browse Source
This commit is contained in:
WickedJack99
2025-06-29 21:52:19 +02:00
parent 11614b4a2d
commit be2d0002cd
1 changed files with 10 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
lab12/exc4/jacobi.cpp
View File

@@ -97,7 +97,15 @@ void Jacobi::exchangeHaloLayersNodeMPIProcSecond(Matrix &phi)
// Communication with lower partner
if (!isFirstRank())
{
SharedmemStates *states = reinterpret_cast<SharedmemStates *>(baseptr_);
// All ranks query pointer to the shared memory (rank 0 gets what it allocated)
void *raw_ptr;
MPI_Aint query_size;
int query_disp_unit;
// We always query rank 0’s memory (shared across node)
MPI_Win_shared_query(win_, 0, &query_size, &query_disp_unit, &raw_ptr);
SharedmemStates *states = reinterpret_cast<SharedmemStates *>(raw_ptr);
double *shm0 = reinterpret_cast<double *>(states + 1); // row 0
double *shm1 = shm0 + sendSize; // row 1
@@ -142,15 +150,7 @@ void Jacobi::exchangeHaloLayersNodeMPIProcFirst(Matrix &phi)
// Communication with upper partner
if (!isLastRank())
{
// All ranks query pointer to the shared memory (rank 0 gets what it allocated)
void *raw_ptr;
MPI_Aint query_size;
int query_disp_unit;
// We always query rank 0’s memory (shared across node)
MPI_Win_shared_query(win_, 0, &query_size, &query_disp_unit, &raw_ptr);
SharedmemStates *states = reinterpret_cast<SharedmemStates *>(raw_ptr);
SharedmemStates *states = reinterpret_cast<SharedmemStates *>(baseptr_);
double *shm0 = reinterpret_cast<double *>(states + 1); // row 0
double *shm1 = shm0 + sendSize; // row 1