mirror of
https://github.com/paboyle/Grid.git
synced 2024-09-20 09:15:38 +01:00
264 lines
7.6 KiB
C++
264 lines
7.6 KiB
C++
#ifndef _GRID_CSHIFT_MPI_H_
|
|
#define _GRID_CSHIFT_MPI_H_
|
|
|
|
#ifndef MAX
|
|
#define MAX(x,y) ((x)>(y)?(x):(y))
|
|
#define MIN(x,y) ((x)>(y)?(y):(x))
|
|
#endif
|
|
|
|
friend Lattice<vobj> Cshift(Lattice<vobj> &rhs,int dimension,int shift)
|
|
{
|
|
typedef typename vobj::vector_type vector_type;
|
|
typedef typename vobj::scalar_type scalar_type;
|
|
|
|
Lattice<vobj> ret(rhs._grid);
|
|
|
|
int fd = rhs._grid->_fdimensions[dimension];
|
|
int rd = rhs._grid->_rdimensions[dimension];
|
|
|
|
// Map to always positive shift modulo global full dimension.
|
|
shift = (shift+fd)%fd;
|
|
|
|
ret.checkerboard = rhs._grid->CheckerBoardDestination(rhs.checkerboard,shift);
|
|
|
|
// the permute type
|
|
int simd_layout = rhs._grid->_simd_layout[dimension];
|
|
int comm_dim = rhs._grid->_processors[dimension] >1 ;
|
|
int splice_dim = rhs._grid->_simd_layout[dimension]>1 && (comm_dim);
|
|
|
|
|
|
if ( !comm_dim ) {
|
|
Cshift_local(ret,rhs,dimension,shift); // Handles checkerboarding
|
|
} else if ( splice_dim ) {
|
|
Cshift_comms_simd(ret,rhs,dimension,shift);
|
|
} else {
|
|
Cshift_comms(ret,rhs,dimension,shift);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
friend void Cshift_comms(Lattice<vobj>& ret,Lattice<vobj> &rhs,int dimension,int shift)
|
|
{
|
|
int sshift[2];
|
|
|
|
sshift[0] = rhs._grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,0);
|
|
sshift[1] = rhs._grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,1);
|
|
|
|
if ( sshift[0] == sshift[1] ) {
|
|
Cshift_comms(ret,rhs,dimension,shift,0x3);
|
|
} else {
|
|
Cshift_comms(ret,rhs,dimension,shift,0x1);// if checkerboard is unfavourable take two passes
|
|
Cshift_comms(ret,rhs,dimension,shift,0x2);// both with block stride loop iteration
|
|
}
|
|
}
|
|
|
|
friend void Cshift_comms_simd(Lattice<vobj>& ret,Lattice<vobj> &rhs,int dimension,int shift)
|
|
{
|
|
int sshift[2];
|
|
|
|
sshift[0] = rhs._grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,0);
|
|
sshift[1] = rhs._grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,1);
|
|
|
|
if ( sshift[0] == sshift[1] ) {
|
|
Cshift_comms_simd(ret,rhs,dimension,shift,0x3);
|
|
} else {
|
|
Cshift_comms_simd(ret,rhs,dimension,shift,0x1);// if checkerboard is unfavourable take two passes
|
|
Cshift_comms_simd(ret,rhs,dimension,shift,0x2);// both with block stride loop iteration
|
|
}
|
|
}
|
|
|
|
|
|
friend void Cshift_comms(Lattice<vobj> &ret,Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
|
|
{
|
|
typedef typename vobj::vector_type vector_type;
|
|
typedef typename vobj::scalar_type scalar_type;
|
|
|
|
GridBase *grid=rhs._grid;
|
|
Lattice<vobj> temp(rhs._grid);
|
|
|
|
int fd = rhs._grid->_fdimensions[dimension];
|
|
int rd = rhs._grid->_rdimensions[dimension];
|
|
int simd_layout = rhs._grid->_simd_layout[dimension];
|
|
int comm_dim = rhs._grid->_processors[dimension] >1 ;
|
|
assert(simd_layout==1);
|
|
assert(comm_dim==1);
|
|
assert(shift>=0);
|
|
assert(shift<fd);
|
|
|
|
int buffer_size = rhs._grid->_slice_nblock[dimension]*rhs._grid->_slice_block[dimension];
|
|
std::vector<vobj,alignedAllocator<vobj> > send_buf(buffer_size);
|
|
std::vector<vobj,alignedAllocator<vobj> > recv_buf(buffer_size);
|
|
|
|
int cb= (cbmask==0x2)? 1 : 0;
|
|
int sshift= rhs._grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,cb);
|
|
|
|
for(int x=0;x<rd;x++){
|
|
|
|
int offnode = ( x+sshift >= rd );
|
|
int sx = (x+sshift)%rd;
|
|
int comm_proc = (x+sshift)/rd;
|
|
|
|
if (!offnode) {
|
|
|
|
Copy_plane(ret,rhs,dimension,x,sx,cbmask);
|
|
|
|
} else {
|
|
|
|
int words = send_buf.size();
|
|
if (cbmask != 0x3) words=words>>1;
|
|
|
|
int bytes = words * sizeof(vobj);
|
|
|
|
Gather_plane_simple (rhs,send_buf,dimension,sx,cbmask);
|
|
|
|
int rank = grid->_processor;
|
|
int recv_from_rank;
|
|
int xmit_to_rank;
|
|
grid->ShiftedRanks(dimension,comm_proc,xmit_to_rank,recv_from_rank);
|
|
|
|
grid->SendToRecvFrom((void *)&send_buf[0],
|
|
xmit_to_rank,
|
|
(void *)&recv_buf[0],
|
|
recv_from_rank,
|
|
bytes);
|
|
|
|
Scatter_plane_simple (ret,recv_buf,dimension,x,cbmask);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
friend void Cshift_comms_simd(Lattice<vobj> &ret,Lattice<vobj> &rhs,int dimension,int shift,int cbmask)
|
|
{
|
|
GridBase *grid=rhs._grid;
|
|
const int Nsimd = grid->Nsimd();
|
|
typedef typename vobj::vector_type vector_type;
|
|
typedef typename vobj::scalar_type scalar_type;
|
|
|
|
int fd = grid->_fdimensions[dimension];
|
|
int rd = grid->_rdimensions[dimension];
|
|
int ld = grid->_ldimensions[dimension];
|
|
int simd_layout = grid->_simd_layout[dimension];
|
|
int comm_dim = grid->_processors[dimension] >1 ;
|
|
|
|
assert(comm_dim==1);
|
|
assert(simd_layout==2);
|
|
assert(shift>=0);
|
|
assert(shift<fd);
|
|
|
|
int permute_type=grid->PermuteType(dimension);
|
|
|
|
///////////////////////////////////////////////
|
|
// Simd direction uses an extract/merge pair
|
|
///////////////////////////////////////////////
|
|
int buffer_size = grid->_slice_nblock[dimension]*grid->_slice_block[dimension];
|
|
int words = sizeof(vobj)/sizeof(vector_type);
|
|
|
|
std::vector<std::vector<scalar_type> > send_buf_extract(Nsimd,std::vector<scalar_type>(buffer_size*words) );
|
|
std::vector<std::vector<scalar_type> > recv_buf_extract(Nsimd,std::vector<scalar_type>(buffer_size*words) );
|
|
int bytes = buffer_size*words*sizeof(scalar_type);
|
|
|
|
std::vector<scalar_type *> pointers(Nsimd); //
|
|
std::vector<scalar_type *> rpointers(Nsimd); // received pointers
|
|
|
|
///////////////////////////////////////////
|
|
// Work out what to send where
|
|
///////////////////////////////////////////
|
|
|
|
int cb = (cbmask==0x2)? 1 : 0;
|
|
int sshift= grid->CheckerBoardShift(rhs.checkerboard,dimension,shift,cb);
|
|
|
|
std::vector<int> comm_offnode(simd_layout);
|
|
std::vector<int> comm_proc (simd_layout); //relative processor coord in dim=dimension
|
|
std::vector<int> icoor(grid->Nd());
|
|
|
|
for(int x=0;x<rd;x++){
|
|
|
|
int comm_any = 0;
|
|
for(int s=0;s<simd_layout;s++) {
|
|
int shifted_x = x+s*rd+sshift;
|
|
comm_offnode[s] = shifted_x >= ld;
|
|
comm_any = comm_any | comm_offnode[s];
|
|
comm_proc[s] = shifted_x/ld;
|
|
}
|
|
|
|
int o = 0;
|
|
int bo = x*grid->_ostride[dimension];
|
|
int sx = (x+sshift)%rd;
|
|
|
|
if ( comm_any ) {
|
|
|
|
for(int i=0;i<Nsimd;i++){
|
|
pointers[i] = (scalar_type *)&send_buf_extract[i][0];
|
|
}
|
|
Gather_plane_extract(rhs,pointers,dimension,sx,cbmask);
|
|
|
|
for(int i=0;i<Nsimd;i++){
|
|
|
|
|
|
int s;
|
|
grid->iCoorFromIindex(icoor,i);
|
|
s = icoor[dimension];
|
|
|
|
if(comm_offnode[s]){
|
|
|
|
int rank = grid->_processor;
|
|
int recv_from_rank;
|
|
int xmit_to_rank;
|
|
grid->ShiftedRanks(dimension,comm_proc[s],xmit_to_rank,recv_from_rank);
|
|
|
|
|
|
grid->SendToRecvFrom((void *)&send_buf_extract[i][0],
|
|
xmit_to_rank,
|
|
(void *)&recv_buf_extract[i][0],
|
|
recv_from_rank,
|
|
bytes);
|
|
|
|
rpointers[i] = (scalar_type *)&recv_buf_extract[i][0];
|
|
|
|
} else {
|
|
|
|
rpointers[i] = (scalar_type *)&send_buf_extract[i][0];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Permute by swizzling pointers in merge
|
|
int permute_slice=0;
|
|
int lshift=sshift%ld;
|
|
int wrap =lshift/rd;
|
|
int num =lshift%rd;
|
|
|
|
if ( x< rd-num ) permute_slice=wrap;
|
|
else permute_slice = 1-wrap;
|
|
|
|
int toggle_bit = (Nsimd>>(permute_type+1));
|
|
int PermuteMap;
|
|
for(int i=0;i<Nsimd;i++){
|
|
if ( permute_slice ) {
|
|
PermuteMap=i^toggle_bit;
|
|
pointers[i] = rpointers[PermuteMap];
|
|
} else {
|
|
pointers[i] = rpointers[i];
|
|
}
|
|
}
|
|
|
|
Scatter_plane_merge(ret,pointers,dimension,x,cbmask);
|
|
|
|
} else {
|
|
|
|
int permute_slice=0;
|
|
int wrap = sshift/rd;
|
|
int num = sshift%rd;
|
|
if ( x< rd-num ) permute_slice=wrap;
|
|
else permute_slice = 1-wrap;
|
|
|
|
if ( permute_slice ) Copy_plane_permute(ret,rhs,dimension,x,sx,cbmask,permute_type);
|
|
else Copy_plane(ret,rhs,dimension,x,sx,cbmask);
|
|
|
|
}
|
|
}
|
|
}
|
|
#endif
|