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Set the lower limit for MemUnit as 1 in Init_FFTw.cpp #472

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Merged
hyschive merged 3 commits into from
Jun 18, 2025
Merged

Set the lower limit for MemUnit as 1 in Init_FFTw.cpp #472

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4a3629e
set the lower limit for MemUnit as 1
koarakawaii Jun 18, 2025
3b1fc96
minor
koarakawaii Jun 18, 2025
856d82d
minor: format
koarakawaii Jun 18, 2025
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12 changes: 7 additions & 5 deletions src/Init/Init_FFTW.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -358,11 +358,13 @@ void Patch2Slab( real *VarS, real *SendBuf_Var, real *RecvBuf_Var, long *SendBuf
# endif // GAMER_DEBUG


const int SSize[2] = { ( InPlacePad ? 2*(FFT_Size[0]/2+1) : FFT_Size[0] ), FFT_Size[1] }; // padded slab size in the x and y directions
const int PSSize = PS1*PS1; // patch slice size
const int MemUnit = amr->NPatchComma[0][1]/MPI_NRank; // set arbitrarily; divided by MPI_NRank so that the memory consumption per rank for arrays
// like TempBuf_Var[MPI_NRank] reduces when launching more ranks
const int AveNz = FFT_Size[2]/MPI_NRank + ( ( FFT_Size[2]%MPI_NRank == 0 ) ? 0 : 1 ); // average slab thickness
const int SSize[2] = { ( InPlacePad ? 2*(FFT_Size[0]/2+1) : FFT_Size[0] ), FFT_Size[1] }; // padded slab size in the x and y directions
const int PSSize = PS1*PS1; // patch slice size
const int MemUnit = MAX( 1, amr->NPatchComma[0][1]/MPI_NRank ); // set arbitrarily; divided by MPI_NRank so that the
// memory consumption per rank for arrays like
// TempBuf_Var[MPI_NRank] reduces when launching
// more ranks
const int AveNz = FFT_Size[2]/MPI_NRank + ( ( FFT_Size[2]%MPI_NRank == 0 ) ? 0 : 1 ); // average slab thickness
const int Scale0 = amr->scale[0];

int Cr[3]; // corner coordinates of each patch normalized to the base-level grid size
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