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Call the fast path compressor for wilson kernels to avoid if else on projector

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This commit is contained in:
Peter Boyle
2016-12-27 11:23:13 +00:00
parent 25efefc5b4
commit 3d21297bbb
3 changed files with 56 additions and 65 deletions
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3
lib/Stencil.h
View File

@@ -678,12 +678,9 @@ PARALLEL_FOR_LOOP
calls++;
Mergers.resize(0);
Packets.resize(0);
_grid->StencilBarrier();
HaloGather(source,compress);
this->CommunicateBegin(reqs);
_grid->StencilBarrier();
this->CommunicateComplete(reqs);
_grid->StencilBarrier();
CommsMerge(); // spins
}

80
lib/qcd/action/fermion/WilsonCompressor.h
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@@ -171,6 +171,8 @@ namespace QCD {
class WilsonStencil : public CartesianStencil<vobj,cobj> {
public:
typedef CartesianCommunicator::CommsRequest_t CommsRequest_t;
WilsonStencil(GridBase *grid,
int npoints,
int checkerboard,
@@ -178,76 +180,68 @@ namespace QCD {
const std::vector<int> &distances) : CartesianStencil<vobj,cobj> (grid,npoints,checkerboard,directions,distances)
{ };
template < class compressor>
std::thread HaloExchangeOptBegin(const Lattice<vobj> &source,compressor &compress) {
this->Mergers.resize(0);
this->Packets.resize(0);
this->HaloGatherOpt(source,compress);
return std::thread([&] { this->Communicate(); });
}
template < class compressor>
void HaloExchangeOpt(const Lattice<vobj> &source,compressor &compress)
{
auto thr = this->HaloExchangeOptBegin(source,compress);
this->HaloExchangeOptComplete(thr);
std::vector<std::vector<CommsRequest_t> > reqs;
this->Mergers.resize(0);
this->Packets.resize(0);
this->HaloGatherOpt(source,compress);
this->CommunicateBegin(reqs);
this->CommunicateComplete(reqs);
this->CommsMerge(); // spins
this->calls++;
}
void HaloExchangeOptComplete(std::thread &thr)
{
this->CommsMerge(); // spins
this->jointime-=usecond();
thr.join();
this->jointime+=usecond();
}
template < class compressor>
void HaloGatherOpt(const Lattice<vobj> &source,compressor &compress)
{
int face_idx=0;
// conformable(source._grid,_grid);
assert(source._grid==this->_grid);
this->halogtime-=usecond();
assert (this->comm_buf.size() == this->_unified_buffer_size );
this->u_comm_offset=0;
int dag = compress.dag;
static std::vector<int> dirs(Nd*2);
for(int mu=0;mu<Nd;mu++){
if ( dag ) {
dirs[mu] =mu;
dirs[mu+4]=mu+Nd;
} else {
dirs[mu] =mu+Nd;
dirs[mu+Nd]=mu;
}
}
WilsonXpCompressor<cobj,vobj> XpCompress;
this->HaloGatherDir(source,XpCompress,dirs[0]);
WilsonYpCompressor<cobj,vobj> YpCompress;
this->HaloGatherDir(source,YpCompress,dirs[1]);
WilsonZpCompressor<cobj,vobj> ZpCompress;
this->HaloGatherDir(source,ZpCompress,dirs[2]);
WilsonTpCompressor<cobj,vobj> TpCompress;
this->HaloGatherDir(source,TpCompress,dirs[3]);
WilsonXmCompressor<cobj,vobj> XmCompress;
this->HaloGatherDir(source,XmCompress,dirs[4]);
WilsonYmCompressor<cobj,vobj> YmCompress;
this->HaloGatherDir(source,YmCompress,dirs[5]);
WilsonZmCompressor<cobj,vobj> ZmCompress;
this->HaloGatherDir(source,ZmCompress,dirs[6]);
WilsonTmCompressor<cobj,vobj> TmCompress;
this->HaloGatherDir(source,TmCompress,dirs[7]);
// Gather all comms buffers
// for(int point = 0 ; point < _npoints; point++) {
// compress.Point(point);
// HaloGatherDir(source,compress,point,face_idx);
// }
if ( dag ) {
this->HaloGatherDir(source,XpCompress,Xp,face_idx);
this->HaloGatherDir(source,YpCompress,Yp,face_idx);
this->HaloGatherDir(source,ZpCompress,Zp,face_idx);
this->HaloGatherDir(source,TpCompress,Tp,face_idx);
this->HaloGatherDir(source,XmCompress,Xm,face_idx);
this->HaloGatherDir(source,YmCompress,Ym,face_idx);
this->HaloGatherDir(source,ZmCompress,Zm,face_idx);
this->HaloGatherDir(source,TmCompress,Tm,face_idx);
} else {
this->HaloGatherDir(source,XmCompress,Xp,face_idx);
this->HaloGatherDir(source,YmCompress,Yp,face_idx);
this->HaloGatherDir(source,ZmCompress,Zp,face_idx);
this->HaloGatherDir(source,TmCompress,Tp,face_idx);
this->HaloGatherDir(source,XpCompress,Xm,face_idx);
this->HaloGatherDir(source,YpCompress,Ym,face_idx);
this->HaloGatherDir(source,ZpCompress,Zm,face_idx);
this->HaloGatherDir(source,TpCompress,Tm,face_idx);
}
this->face_table_computed=1;
assert(this->u_comm_offset==this->_unified_buffer_size);
this->halogtime+=usecond();
}

4
lib/qcd/action/fermion/WilsonFermion5D.cc
View File

@@ -403,7 +403,7 @@ void WilsonFermion5D<Impl>::DhopInternal(StencilImpl & st, LebesgueOrder &lo,
int LLs = in._grid->_rdimensions[0];
DhopCommTime-=usecond();
st.HaloExchange(in,compressor);
st.HaloExchangeOpt(in,compressor);
DhopCommTime+=usecond();
DhopComputeTime-=usecond();
@@ -437,7 +437,7 @@ void WilsonFermion5D<Impl>::DhopInternal(StencilImpl & st, LebesgueOrder &lo,
stat.accum(nthreads);
#endif
} else {
#if 1
#if 0
PARALLEL_FOR_LOOP
for (int ss = 0; ss < U._grid->oSites(); ss++) {
int sU = ss;