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https://github.com/paboyle/Grid.git
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The stencils for the staple and rect-staple padded cell implementations are now created and stored by workspace classes that allow for reuse providing the grids remain consistent
The workspaces are now used by the plaq+rectangle gauge action resulting in a further 2x performance improvement as measured on a 16^4 local volume for 2 nodes (16 ranks) of Crusher
This commit is contained in:
Christopher Kelly
parent
f44dce390f
commit
1dfaa08afb
@ -43,7 +43,7 @@ public:
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private:
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RealD c_plaq;
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RealD c_rect;
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typename WilsonLoops<Gimpl>::StapleAndRectStapleAllWorkspace workspace;
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public:
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PlaqPlusRectangleAction(RealD b,RealD c): c_plaq(b),c_rect(c){};
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@ -83,7 +83,7 @@ public:
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U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
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}
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std::vector<GaugeLinkField> RectStaple(Nd,grid), Staple(Nd,grid);
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WilsonLoops<Gimpl>::StapleAndRectStapleAll(Staple, RectStaple, U);
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WilsonLoops<Gimpl>::StapleAndRectStapleAll(Staple, RectStaple, U, workspace);
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GaugeLinkField dSdU_mu(grid);
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GaugeLinkField staple(grid);
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@ -349,47 +349,129 @@ public:
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for(int mu=0;mu<Nd;mu++) Staple(staple[mu], U, mu);
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}
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//A workspace class allowing reuse of the stencil
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class WilsonLoopPaddedStencilWorkspace{
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std::unique_ptr<GeneralLocalStencil> stencil;
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size_t nshift;
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void generateStencil(GridBase* padded_grid){
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double t0 = usecond();
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//Generate shift arrays
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std::vector<Coordinate> shifts = this->getShifts();
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nshift = shifts.size();
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double t1 = usecond();
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//Generate local stencil
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stencil.reset(new GeneralLocalStencil(padded_grid,shifts));
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double t2 = usecond();
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std::cout << GridLogPerformance << " WilsonLoopPaddedWorkspace timings: coord:" << (t1-t0)/1000 << "ms, stencil:" << (t2-t1)/1000 << "ms" << std::endl;
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}
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public:
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//Get the stencil. If not already generated, or if generated using a different Grid than in PaddedCell, it will be created on-the-fly
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const GeneralLocalStencil & getStencil(const PaddedCell &pcell){
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assert(pcell.depth >= this->paddingDepth());
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if(!stencil || stencil->Grid() != (GridBase*)pcell.grids.back() ) generateStencil((GridBase*)pcell.grids.back());
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return *stencil;
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}
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size_t Nshift() const{ return nshift; }
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virtual std::vector<Coordinate> getShifts() const = 0;
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virtual int paddingDepth() const = 0; //padding depth required
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virtual ~WilsonLoopPaddedStencilWorkspace(){}
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};
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//This workspace allows the sharing of a common PaddedCell object between multiple stencil workspaces
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class WilsonLoopPaddedWorkspace{
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std::vector<WilsonLoopPaddedStencilWorkspace*> stencil_wk;
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std::unique_ptr<PaddedCell> pcell;
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void generatePcell(GridBase* unpadded_grid){
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assert(stencil_wk.size());
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int max_depth = 0;
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for(auto const &s : stencil_wk) max_depth=std::max(max_depth, s->paddingDepth());
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pcell.reset(new PaddedCell(max_depth, dynamic_cast<GridCartesian*>(unpadded_grid)));
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}
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public:
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//Add a stencil definition. This should be done before the first call to retrieve a stencil object.
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//Takes ownership of the pointer
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void addStencil(WilsonLoopPaddedStencilWorkspace *stencil){
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assert(!pcell);
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stencil_wk.push_back(stencil);
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}
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const GeneralLocalStencil & getStencil(const size_t stencil_idx, GridBase* unpadded_grid){
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if(!pcell || pcell->unpadded_grid != unpadded_grid) generatePcell(unpadded_grid);
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return stencil_wk[stencil_idx]->getStencil(*pcell);
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}
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const PaddedCell & getPaddedCell(GridBase* unpadded_grid){
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if(!pcell || pcell->unpadded_grid != unpadded_grid) generatePcell(unpadded_grid);
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return *pcell;
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}
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~WilsonLoopPaddedWorkspace(){
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for(auto &s : stencil_wk) delete s;
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}
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};
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//A workspace class allowing reuse of the stencil
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class StaplePaddedAllWorkspace: public WilsonLoopPaddedStencilWorkspace{
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public:
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std::vector<Coordinate> getShifts() const override{
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std::vector<Coordinate> shifts;
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for(int mu=0;mu<Nd;mu++){
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for(int nu=0;nu<Nd;nu++){
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if(nu != mu){
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Coordinate shift_0(Nd,0);
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Coordinate shift_mu(Nd,0); shift_mu[mu]=1;
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Coordinate shift_nu(Nd,0); shift_nu[nu]=1;
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Coordinate shift_mnu(Nd,0); shift_mnu[nu]=-1;
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Coordinate shift_mnu_pmu(Nd,0); shift_mnu_pmu[nu]=-1; shift_mnu_pmu[mu]=1;
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//U_nu(x+mu)U^dag_mu(x+nu) U^dag_nu(x)
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shifts.push_back(shift_0);
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shifts.push_back(shift_nu);
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shifts.push_back(shift_mu);
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//U_nu^dag(x-nu+mu) U_mu^dag(x-nu) U_nu(x-nu)
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shifts.push_back(shift_mnu);
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shifts.push_back(shift_mnu);
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shifts.push_back(shift_mnu_pmu);
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}
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}
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}
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return shifts;
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}
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int paddingDepth() const override{ return 1; }
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};
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//Padded cell implementation of the staple method for all mu, summed over nu != mu
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//staple: output staple for each mu, summed over nu != mu (Nd)
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//U_padded: the gauge link fields padded out using the PaddedCell class
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//Cell: the padded cell class
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static void StaplePaddedAll(std::vector<GaugeMat> &staple, const std::vector<GaugeMat> &U_padded, const PaddedCell &Cell) {
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StaplePaddedAllWorkspace wk;
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StaplePaddedAll(staple,U_padded,Cell,wk.getStencil(Cell));
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}
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//Padded cell implementation of the staple method for all mu, summed over nu != mu
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//staple: output staple for each mu, summed over nu != mu (Nd)
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//U_padded: the gauge link fields padded out using the PaddedCell class
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//Cell: the padded cell class
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//gStencil: the precomputed generalized local stencil for the staple
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static void StaplePaddedAll(std::vector<GaugeMat> &staple, const std::vector<GaugeMat> &U_padded, const PaddedCell &Cell, const GeneralLocalStencil &gStencil) {
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double t0 = usecond();
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assert(U_padded.size() == Nd); assert(staple.size() == Nd);
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assert(U_padded[0].Grid() == (GridBase*)Cell.grids.back());
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assert(Cell.depth >= 1);
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GridBase *ggrid = U_padded[0].Grid(); //padded cell grid
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double t0 = usecond();
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//Generate shift arrays
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std::vector<Coordinate> shifts;
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for(int mu=0;mu<Nd;mu++){
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for(int nu=0;nu<Nd;nu++){
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if(nu != mu){
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Coordinate shift_0(Nd,0);
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Coordinate shift_mu(Nd,0); shift_mu[mu]=1;
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Coordinate shift_nu(Nd,0); shift_nu[nu]=1;
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Coordinate shift_mnu(Nd,0); shift_mnu[nu]=-1;
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Coordinate shift_mnu_pmu(Nd,0); shift_mnu_pmu[nu]=-1; shift_mnu_pmu[mu]=1;
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//U_nu(x+mu)U^dag_mu(x+nu) U^dag_nu(x)
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shifts.push_back(shift_0);
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shifts.push_back(shift_nu);
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shifts.push_back(shift_mu);
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//U_nu^dag(x-nu+mu) U_mu^dag(x-nu) U_nu(x-nu)
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shifts.push_back(shift_mnu);
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shifts.push_back(shift_mnu);
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shifts.push_back(shift_mnu_pmu);
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}
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}
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}
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int shift_mu_off = shifts.size()/Nd;
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double t1 = usecond();
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//Generate local stencil
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GeneralLocalStencil gStencil(ggrid,shifts);
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double t2 = usecond();
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int shift_mu_off = gStencil._npoints/Nd;
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//Open views to padded gauge links and keep open over mu loop
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typedef LatticeView<typename GaugeMat::vector_object> GaugeViewType;
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@ -447,9 +529,9 @@ public:
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free(Ug_dirs_v_host);
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acceleratorFreeDevice(Ug_dirs_v);
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double t3=usecond();
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double t1=usecond();
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std::cout << GridLogPerformance << "StaplePaddedAll timings: coord:" << (t1-t0)/1000 << "ms, stencil:" << (t2-t1)/1000 << "ms, kernel:" << (t3-t2)/1000 << "ms" << std::endl;
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std::cout << GridLogPerformance << "StaplePaddedAll timing:" << (t1-t0)/1000 << "ms" << std::endl;
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}
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@ -1016,75 +1098,91 @@ public:
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for(int mu=0;mu<Nd;mu++) RectStapleOptimised(Stap[mu], U2, U, mu);
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}
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//A workspace class allowing reuse of the stencil
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class RectStaplePaddedAllWorkspace: public WilsonLoopPaddedStencilWorkspace{
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public:
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std::vector<Coordinate> getShifts() const override{
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std::vector<Coordinate> shifts;
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for (int mu = 0; mu < Nd; mu++){
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for (int nu = 0; nu < Nd; nu++) {
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if (nu != mu) {
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auto genShift = [&](int mushift,int nushift){
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Coordinate out(Nd,0); out[mu]=mushift; out[nu]=nushift; return out;
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};
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//tmp6 = tmp5(x+mu) = U_mu(x+mu)U_nu(x+2mu)U_mu^dag(x+nu+mu) U_mu^dag(x+nu) U_nu^dag(x)
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shifts.push_back(genShift(0,0));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(+1,+1));
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shifts.push_back(genShift(+2,0));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U_mu(x+mu)U^dag_nu(x-nu+2mu)U^dag_mu(x-nu+mu)U^dag_mu(x-nu)U_nu(x-nu)
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(+1,-1));
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shifts.push_back(genShift(+2,-1));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U^dag_nu(x-nu+mu)U^dag_mu(x-nu)U^dag_mu(x-mu-nu)U_nu(x-mu-nu)U_mu(x-mu)
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,-1));
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shifts.push_back(genShift(-1,-1));
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(+1,-1));
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//tmp5 = tmp4(x+mu) = U_nu(x+mu)U_mu^dag(x+nu)U_mu^dag(x-mu+nu)U_nu^dag(x-mu)U_mu(x-mu)
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,+1));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(+1,0));
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//tmp6 = tmp5(x+mu) = U_nu(x+mu)U_nu(x+mu+nu)U_mu^dag(x+2nu)U_nu^dag(x+nu)U_nu^dag(x)
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shifts.push_back(genShift(0,0));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(0,+2));
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shifts.push_back(genShift(+1,+1));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U_nu^dag(x+mu-nu)U_nu^dag(x+mu-2nu)U_mu^dag(x-2nu)U_nu(x-2nu)U_nu(x-nu)
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(0,-2));
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shifts.push_back(genShift(0,-2));
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shifts.push_back(genShift(+1,-2));
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shifts.push_back(genShift(+1,-1));
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}
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}
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}
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return shifts;
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}
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int paddingDepth() const override{ return 2; }
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};
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//Padded cell implementation of the rectangular staple method for all mu, summed over nu != mu
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//staple: output staple for each mu, summed over nu != mu (Nd)
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//U_padded: the gauge link fields padded out using the PaddedCell class
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//Cell: the padded cell class
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static void RectStaplePaddedAll(std::vector<GaugeMat> &staple, const std::vector<GaugeMat> &U_padded, const PaddedCell &Cell) {
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RectStaplePaddedAllWorkspace wk;
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RectStaplePaddedAll(staple,U_padded,Cell,wk.getStencil(Cell));
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}
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//Padded cell implementation of the rectangular staple method for all mu, summed over nu != mu
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//staple: output staple for each mu, summed over nu != mu (Nd)
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//U_padded: the gauge link fields padded out using the PaddedCell class
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//Cell: the padded cell class
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//gStencil: the stencil
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static void RectStaplePaddedAll(std::vector<GaugeMat> &staple, const std::vector<GaugeMat> &U_padded, const PaddedCell &Cell, const GeneralLocalStencil &gStencil) {
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double t0 = usecond();
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assert(U_padded.size() == Nd); assert(staple.size() == Nd);
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assert(U_padded[0].Grid() == (GridBase*)Cell.grids.back());
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assert(Cell.depth >= 2);
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GridBase *ggrid = U_padded[0].Grid(); //padded cell grid
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double t0 = usecond();
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std::vector<Coordinate> shifts;
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for (int mu = 0; mu < Nd; mu++){
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for (int nu = 0; nu < Nd; nu++) {
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if (nu != mu) {
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auto genShift = [&](int mushift,int nushift){
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Coordinate out(Nd,0); out[mu]=mushift; out[nu]=nushift; return out;
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};
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//tmp6 = tmp5(x+mu) = U_mu(x+mu)U_nu(x+2mu)U_mu^dag(x+nu+mu) U_mu^dag(x+nu) U_nu^dag(x)
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shifts.push_back(genShift(0,0));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(+1,+1));
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shifts.push_back(genShift(+2,0));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U_mu(x+mu)U^dag_nu(x-nu+2mu)U^dag_mu(x-nu+mu)U^dag_mu(x-nu)U_nu(x-nu)
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(+1,-1));
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shifts.push_back(genShift(+2,-1));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U^dag_nu(x-nu+mu)U^dag_mu(x-nu)U^dag_mu(x-mu-nu)U_nu(x-mu-nu)U_mu(x-mu)
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,-1));
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shifts.push_back(genShift(-1,-1));
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(+1,-1));
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//tmp5 = tmp4(x+mu) = U_nu(x+mu)U_mu^dag(x+nu)U_mu^dag(x-mu+nu)U_nu^dag(x-mu)U_mu(x-mu)
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,0));
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shifts.push_back(genShift(-1,+1));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(+1,0));
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//tmp6 = tmp5(x+mu) = U_nu(x+mu)U_nu(x+mu+nu)U_mu^dag(x+2nu)U_nu^dag(x+nu)U_nu^dag(x)
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shifts.push_back(genShift(0,0));
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shifts.push_back(genShift(0,+1));
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shifts.push_back(genShift(0,+2));
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shifts.push_back(genShift(+1,+1));
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shifts.push_back(genShift(+1,0));
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//tmp5 = tmp4(x+mu) = U_nu^dag(x+mu-nu)U_nu^dag(x+mu-2nu)U_mu^dag(x-2nu)U_nu(x-2nu)U_nu(x-nu)
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shifts.push_back(genShift(0,-1));
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shifts.push_back(genShift(0,-2));
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shifts.push_back(genShift(0,-2));
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shifts.push_back(genShift(+1,-2));
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shifts.push_back(genShift(+1,-1));
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}
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}
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}
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size_t nshift = shifts.size();
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size_t nshift = gStencil._npoints;
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int mu_off_delta = nshift / Nd;
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double t1 = usecond();
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GeneralLocalStencil gStencil(ggrid,shifts);
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double t2 = usecond();
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//Open views to padded gauge links and keep open over mu loop
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typedef LatticeView<typename GaugeMat::vector_object> GaugeViewType;
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@ -1208,13 +1306,20 @@ public:
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free(Ug_dirs_v_host);
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acceleratorFreeDevice(Ug_dirs_v);
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double t3 = usecond();
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double t1 = usecond();
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std::cout << GridLogPerformance << "RectStaplePaddedAll timings: coord:" << (t1-t0)/1000 << "ms, stencil:" << (t2-t1)/1000 << "ms, kernel:" << (t3-t2)/1000 << "ms" << std::endl;
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std::cout << GridLogPerformance << "RectStaplePaddedAll timings:" << (t1-t0)/1000 << "ms" << std::endl;
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}
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//A workspace for reusing the PaddedCell and GeneralLocalStencil objects
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class StapleAndRectStapleAllWorkspace: public WilsonLoopPaddedWorkspace{
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public:
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StapleAndRectStapleAllWorkspace(){
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this->addStencil(new StaplePaddedAllWorkspace);
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this->addStencil(new RectStaplePaddedAllWorkspace);
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}
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};
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//////////////////////////////////////////////////////
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//Compute the 1x1 and 1x2 staples for all orientations
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//Stap : Array of staples (Nd)
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@ -1222,27 +1327,39 @@ public:
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//U: Gauge links in each direction (Nd)
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/////////////////////////////////////////////////////
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static void StapleAndRectStapleAll(std::vector<GaugeMat> &Stap, std::vector<GaugeMat> &RectStap, const std::vector<GaugeMat> &U){
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StapleAndRectStapleAllWorkspace wk;
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StapleAndRectStapleAll(Stap,RectStap,U,wk);
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////
|
||||
//Compute the 1x1 and 1x2 staples for all orientations
|
||||
//Stap : Array of staples (Nd)
|
||||
//RectStap: Array of rectangular staples (Nd)
|
||||
//U: Gauge links in each direction (Nd)
|
||||
//wk: a workspace containing stored PaddedCell and GeneralLocalStencil objects to maximize reuse
|
||||
/////////////////////////////////////////////////////
|
||||
static void StapleAndRectStapleAll(std::vector<GaugeMat> &Stap, std::vector<GaugeMat> &RectStap, const std::vector<GaugeMat> &U, StapleAndRectStapleAllWorkspace &wk){
|
||||
#if 0
|
||||
StapleAll(Stap, U);
|
||||
RectStapleAll(RectStap, U);
|
||||
#else
|
||||
double t0 = usecond();
|
||||
//Use the padded cell with maximal reuse
|
||||
PaddedCell Ghost(2, dynamic_cast<GridCartesian*>(U[0].Grid()));
|
||||
|
||||
GridCartesian* unpadded_grid = dynamic_cast<GridCartesian*>(U[0].Grid());
|
||||
const PaddedCell &Ghost = wk.getPaddedCell(unpadded_grid);
|
||||
|
||||
CshiftImplGauge<Gimpl> cshift_impl;
|
||||
std::vector<GaugeMat> U_pad(Nd, Ghost.grids.back());
|
||||
for(int mu=0;mu<Nd;mu++) U_pad[mu] = Ghost.Exchange(U[mu], cshift_impl);
|
||||
double t1 = usecond();
|
||||
StaplePaddedAll(Stap, U_pad, Ghost);
|
||||
StaplePaddedAll(Stap, U_pad, Ghost, wk.getStencil(0,unpadded_grid) );
|
||||
double t2 = usecond();
|
||||
RectStaplePaddedAll(RectStap, U_pad, Ghost);
|
||||
RectStaplePaddedAll(RectStap, U_pad, Ghost, wk.getStencil(1,unpadded_grid));
|
||||
double t3 = usecond();
|
||||
std::cout << GridLogPerformance << "StapleAndRectStapleAll timings: pad:" << (t1-t0)/1000 << "ms, staple:" << (t2-t1)/1000 << "ms, rect-staple:" << (t3-t2)/1000 << "ms" << std::endl;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
|
||||
//////////////////////////////////////////////////
|
||||
// Wilson loop of size (R1, R2), oriented in mu,nu plane
|
||||
//////////////////////////////////////////////////
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user