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Creating less custom datatypes to lower Open MPI memory consumption #1332

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Creating less custom datatypes to lower Open MPI memory consumption #1332

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0415874
Restore gitignore
MikaelHuppunen Jun 9, 2026
4fa40d5
Merge remote-tracking branch 'upstream/dev' into dev
MikaelHuppunen Jul 27, 2026
d67a748
Not making a new datatype in case of one displacement
MikaelHuppunen Jul 27, 2026
630a836
Added endline to gitignore
MikaelHuppunen Aug 4, 2026
9017957
Merge branch 'dev' into lessTypeCreation
MikaelHuppunen Aug 4, 2026
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5 changes: 5 additions & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -19,3 +19,8 @@ nbproject
vlsvdiff_DP
vlsvextract_DP
compile_commands.json
libraries*/
library-build/
run_*/
!run_tests.sh
profile/
22 changes: 14 additions & 8 deletions spatial_cells/spatial_cell_gpu.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1002,14 +1002,20 @@
MPI_Datatype datatype;

if (displacements.size() > 0) {
count = 1;
MPI_Type_create_hindexed(
displacements.size(),
&block_lengths[0],
&displacements[0],
MPI_BYTE,
&datatype
);
if (displacements.size() == 1) {
address = address + displacements[0];

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pointer of type ‘void *’ used in arithmetic [-Wpointer-arith]

Check warning on line 1006 in spatial_cells/spatial_cell_gpu.cpp

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pointer of type ‘void *’ used in arithmetic [-Wpointer-arith]

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pointer of type ‘void *’ used in arithmetic [-Wpointer-arith]
count = block_lengths[0];
datatype = MPI_BYTE;
} else {
count = 1;
MPI_Type_create_hindexed(
displacements.size(),
&block_lengths[0],
&displacements[0],
MPI_BYTE,
&datatype
);
}
} else {
count = 0;
datatype = MPI_BYTE;
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