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This commit is contained in:
Peter Boyle
2018-09-24 22:10:30 +01:00
parent a55c6f34f3
commit b1c4e96382
4 changed files with 614 additions and 226 deletions
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34
documentation/interfacing.rst
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@@ -10,7 +10,7 @@ examples.
MPI initialization
------------------
--------------------
Grid supports threaded MPI sends and receives and, if running with
more than one thread, requires the MPI_THREAD_MULTIPLE mode of message
@@ -21,7 +21,7 @@ appropriate initialization call is::
assert(MPI_THREAD_MULTIPLE == provided);
Grid Initialization
-------------------
---------------------
Grid itself is initialized with a call::
@@ -38,12 +38,14 @@ The following Grid procedures are useful for verifying that Grid is
properly initialized.
============================================================= ===========================================================================================================
Grid procedure returns
Grid procedure returns
============================================================= ===========================================================================================================
std::vector<int> GridDefaultLatt(); lattice size
std::vector<int> GridDefaultSimd(int Nd,vComplex::Nsimd()); SIMD layout
std::vector<int> GridDefaultMpi(); MPI layout
int Grid::GridThread::GetThreads(); number of threads
std::vector<int> GridDefaultLatt(); lattice size
std::vector<int> GridDefaultSimd(int Nd,vComplex::Nsimd()); SIMD layout
std::vector<int> GridDefaultMpi(); MPI layout
int Grid::GridThread::GetThreads(); number of threads
============================================================= ===========================================================================================================
MPI coordination
----------------
@@ -96,7 +98,7 @@ returns a rank that agrees with Grid's `peRank`.
Mapping fields between Grid and user layouts
-------------------------------------------
---------------------------------------------
In order to map data between layouts, it is important to know
how the lattice sites are distributed across the processor grid. A
@@ -177,15 +179,15 @@ Grid 5D fermion field `cv5`.
**Example**::
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt();
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid) typename ImprovedStaggeredFermion5D::FermionField cv5(FrbGrid);
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt();
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid) typename ImprovedStaggeredFermion5D::FermionField cv5(FrbGrid);
std::vector<int> r(4);
indexToCoords(idx,r);
std::vector<int> r5(1,0);
for( int d = 0; d < 4; d++ ) r5.push_back(r[d]);
std::vector<int> r(4);
indexToCoords(idx,r);
std::vector<int> r5(1,0);
for( int d = 0; d < 4; d++ ) r5.push_back(r[d]);
for( int j = 0; j < Ls; j++ ){
for( int j = 0; j < Ls; j++ ){
r5[0] = j;
ColourVector cVec;
for(int col=0; col<Nc; col++){
@@ -193,5 +195,5 @@ Grid 5D fermion field `cv5`.
Complex(src[j][idx].c[col].real, src[j][idx].c[col].imag);
}
pokeLocalSite(cVec, *(out->cv), r5);
}
}