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Stop mucking about with THREAD_MULTIPLE

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This commit is contained in:
Peter Boyle
2026-08-28 07:06:45 -04:00
parent 2264afda84
commit 27e32b1633
6 changed files with 72 additions and 44 deletions
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examples/Example_pvdagm_v2_3level_DenseCoarseMatrix.cc
-11
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@@ -556,17 +556,6 @@ public:
int main (int argc, char ** argv)
{
// GRID_MPI_THREAD_MULTIPLE=1: initialise MPI at MPI_THREAD_MULTIPLE before
// Grid_init (Grid asks for SERIALIZED). The SLATE harness does this and its
// copy of the 2D inverse ran at ~2x the production ring rate (62 s vs
// 133-141 s). Second hypothesis behind OMP_NUM_THREADS; test one at a time.
// Pair with MPICH_MAX_THREAD_SAFETY=multiple.
if ( getenv("GRID_MPI_THREAD_MULTIPLE") ) {
int provided = 0;
MPI_Init_thread(&argc, &argv, MPI_THREAD_MULTIPLE, &provided);
std::cout << "GRID_MPI_THREAD_MULTIPLE: requested MPI_THREAD_MULTIPLE, provided " << provided
<< (provided==MPI_THREAD_MULTIPLE ? " (MULTIPLE)" : " (NOT multiple)") << std::endl;
}
Grid_init(&argc,&argv);
ParseEnvironment();