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Staggered overlap comms comput

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This commit is contained in:
Azusa Yamaguchi
2018-01-09 13:02:52 +00:00
parent e55397bc13
commit 24162c9ead
10 changed files with 869 additions and 489 deletions
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40
lib/stencil/Stencil.h
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@@ -149,7 +149,9 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
std::vector<int> _distances;
std::vector<int> _comm_buf_size;
std::vector<int> _permute_type;
std::vector<int> same_node;
std::vector<int> surface_list;
Vector<StencilEntry> _entries;
std::vector<Packet> Packets;
std::vector<Merge> Mergers;
@@ -200,7 +202,7 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
int dimension = _directions[point];
int displacement = _distances[point];
assert( (displacement==1) || (displacement==-1));
int pd = _grid->_processors[dimension];
int fd = _grid->_fdimensions[dimension];
@@ -215,9 +217,12 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
if ( ! comm_dim ) return 1;
int nbr_proc;
if (displacement==1) nbr_proc = 1;
else nbr_proc = pd-1;
if (displacement>0) nbr_proc = 1;
else nbr_proc = pd-1;
// FIXME this logic needs to be sorted for three link term
// assert( (displacement==1) || (displacement==-1));
// Present hack only works for >= 4^4 subvol per node
_grid->ShiftedRanks(dimension,nbr_proc,xmit_to_rank,recv_from_rank);
void *shm = (void *) _grid->ShmBufferTranslate(recv_from_rank,u_recv_buf_p);
@@ -539,6 +544,29 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
}
};
// Move interior/exterior split into the generic stencil
// FIXME Explicit Ls in interface is a pain. Should just use a vol
void BuildSurfaceList(int Ls,int vol4){
// find same node for SHM
// Here we know the distance is 1 for WilsonStencil
for(int point=0;point<this->_npoints;point++){
same_node[point] = this->SameNode(point);
}
for(int site = 0 ;site< vol4;site++){
int local = 1;
for(int point=0;point<this->_npoints;point++){
if( (!this->GetNodeLocal(site*Ls,point)) && (!same_node[point]) ){
local = 0;
}
}
if(local == 0) {
surface_list.push_back(site);
}
}
}
CartesianStencil(GridBase *grid,
int npoints,
int checkerboard,
@@ -549,7 +577,8 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
comm_bytes_thr(npoints),
comm_enter_thr(npoints),
comm_leave_thr(npoints),
comm_time_thr(npoints)
comm_time_thr(npoints),
same_node(npoints)
{
face_table_computed=0;
_npoints = npoints;
@@ -557,6 +586,7 @@ class CartesianStencil { // Stencil runs along coordinate axes only; NO diagonal
_directions = directions;
_distances = distances;
_unified_buffer_size=0;
surface_list.resize(0);
int osites = _grid->oSites();