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Move compressors out of Cshift.

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Slice iterators would help
This commit is contained in:
paboyle 2017-04-20 13:17:55 +01:00
parent 957a706d0b
commit 180c732b4c
2 changed files with 14 additions and 68 deletions
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67
lib/cshift/Cshift_common.h
View File

@ -30,33 +30,11 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
namespace Grid {
template<class vobj>
class SimpleCompressor {
public:
void Point(int) {};
inline int CommDatumSize(void) { return sizeof(vobj); }
inline bool DecompressionStep(void) { return false; }
inline void Compress(vobj *buf,int o,const vobj &in) { buf[o]=in; }
inline void Exchange(vobj *mp,vobj *vp0,vobj *vp1,Integer type,Integer o){
exchange(mp[2*o],mp[2*o+1],vp0[o],vp1[o],type);
}
inline void Decompress(vobj *out,vobj *in, int o){ assert(0); }
inline void CompressExchange(vobj *out0,vobj *out1,const vobj *in,
int j,int k, int m,int type){
exchange(out0[j],out1[j],in[k],in[m],type);
}
// For cshift. Cshift should drop compressor coupling altogether
// because I had to decouple the code from the Stencil anyway
inline vobj operator() (const vobj &arg) {
return arg;
}
};
///////////////////////////////////////////////////////////////////
// Gather for when there is no need to SIMD split with compression
// Gather for when there is no need to SIMD split
///////////////////////////////////////////////////////////////////
template<class vobj,class cobj,class compressor> void
Gather_plane_simple (const Lattice<vobj> &rhs,commVector<cobj> &buffer,int dimension,int plane,int cbmask,compressor &compress, int off=0)
template<class vobj> void
Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer,int dimension,int plane,int cbmask, int off=0)
{
int rd = rhs._grid->_rdimensions[dimension];
@ -74,7 +52,7 @@ Gather_plane_simple (const Lattice<vobj> &rhs,commVector<cobj> &buffer,int dimen
for(int b=0;b<e2;b++){
int o = n*stride;
int bo = n*e2;
buffer[off+bo+b]=compress(rhs._odata[so+o+b]);
buffer[off+bo+b]=rhs._odata[so+o+b];
}
}
} else {
@ -90,17 +68,16 @@ Gather_plane_simple (const Lattice<vobj> &rhs,commVector<cobj> &buffer,int dimen
}
}
parallel_for(int i=0;i<table.size();i++){
buffer[off+table[i].first]=compress(rhs._odata[so+table[i].second]);
buffer[off+table[i].first]=rhs._odata[so+table[i].second];
}
}
}
///////////////////////////////////////////////////////////////////
// Gather for when there *is* need to SIMD split with compression
// Gather for when there *is* need to SIMD split
///////////////////////////////////////////////////////////////////
template<class cobj,class vobj,class compressor> void
Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename cobj::scalar_object *> pointers,int dimension,int plane,int cbmask,compressor &compress)
template<class vobj> void
Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
{
int rd = rhs._grid->_rdimensions[dimension];
@ -121,8 +98,8 @@ Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename cobj::scalar_
int o = n*n1;
int offset = b+n*e2;
cobj temp =compress(rhs._odata[so+o+b]);
extract<cobj>(temp,pointers,offset);
vobj temp =rhs._odata[so+o+b];
extract<vobj>(temp,pointers,offset);
}
}
@ -139,32 +116,14 @@ Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename cobj::scalar_
int offset = b+n*e2;
if ( ocb & cbmask ) {
cobj temp =compress(rhs._odata[so+o+b]);
extract<cobj>(temp,pointers,offset);
vobj temp =rhs._odata[so+o+b];
extract<vobj>(temp,pointers,offset);
}
}
}
}
}
//////////////////////////////////////////////////////
// Gather for when there is no need to SIMD split
//////////////////////////////////////////////////////
template<class vobj> void Gather_plane_simple (const Lattice<vobj> &rhs,commVector<vobj> &buffer, int dimension,int plane,int cbmask)
{
SimpleCompressor<vobj> dontcompress;
Gather_plane_simple (rhs,buffer,dimension,plane,cbmask,dontcompress);
}
//////////////////////////////////////////////////////
// Gather for when there *is* need to SIMD split
//////////////////////////////////////////////////////
template<class vobj> void Gather_plane_extract(const Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
{
SimpleCompressor<vobj> dontcompress;
Gather_plane_extract<vobj,vobj,decltype(dontcompress)>(rhs,pointers,dimension,plane,cbmask,dontcompress);
}
//////////////////////////////////////////////////////
// Scatter for when there is no need to SIMD split
//////////////////////////////////////////////////////
@ -212,7 +171,7 @@ template<class vobj> void Scatter_plane_simple (Lattice<vobj> &rhs,commVector<vo
//////////////////////////////////////////////////////
// Scatter for when there *is* need to SIMD split
//////////////////////////////////////////////////////
template<class vobj,class cobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<cobj *> pointers,int dimension,int plane,int cbmask)
template<class vobj> void Scatter_plane_merge(Lattice<vobj> &rhs,std::vector<typename vobj::scalar_object *> pointers,int dimension,int plane,int cbmask)
{
int rd = rhs._grid->_rdimensions[dimension];

15
lib/cshift/Cshift_mpi.h
View File

@ -154,13 +154,7 @@ template<class vobj> void Cshift_comms(Lattice<vobj> &ret,const Lattice<vobj> &r
recv_from_rank,
bytes);
grid->Barrier();
/*
for(int i=0;i<send_buf.size();i++){
assert(recv_buf.size()==buffer_size);
assert(send_buf.size()==buffer_size);
std::cout << "SendRecv_Cshift_comms ["<<i<<" "<< dimension<<"] snd "<<send_buf[i]<<" rcv " << recv_buf[i] << " 0x" << cbmask<<std::endl;
}
*/
Scatter_plane_simple (ret,recv_buf,dimension,x,cbmask);
}
}
@ -246,13 +240,6 @@ template<class vobj> void Cshift_comms_simd(Lattice<vobj> &ret,const Lattice<vo
(void *)&recv_buf_extract[i][0],
recv_from_rank,
bytes);
/*
for(int w=0;w<recv_buf_extract[i].size();w++){
assert(recv_buf_extract[i].size()==buffer_size);
assert(send_buf_extract[i].size()==buffer_size);
std::cout << "SendRecv_Cshift_comms ["<<w<<" "<< dimension<<"] recv "<<recv_buf_extract[i][w]<<" send " << send_buf_extract[nbr_lane][w] << cbmask<<std::endl;
}
*/
grid->Barrier();
rpointers[i] = &recv_buf_extract[i][0];
} else {