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https://github.com/paboyle/Grid.git
synced 2025-06-20 08:46:55 +01:00
Updates in tests to make all of Grid compile
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@ -81,16 +81,20 @@ public:
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virtual RealD S(const Field &p)
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{
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assert(p._grid->Nd() == Ndim);
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static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
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assert(p.Grid()->Nd() == Ndim);
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static Stencil phiStencil(p.Grid(), npoint, 0, directions, displacements);
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phiStencil.HaloExchange(p, compressor);
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Field action(p._grid), pshift(p._grid), phisquared(p._grid);
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Field action(p.Grid()), pshift(p.Grid()), phisquared(p.Grid());
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phisquared = p * p;
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action = (2.0 * Ndim + mass_square) * phisquared - lambda * phisquared * phisquared;
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auto p_v = p.View();
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auto action_v = action.View();
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for (int mu = 0; mu < Ndim; mu++)
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{
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// pshift = Cshift(p, mu, +1); // not efficient, implement with stencils
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parallel_for(int i = 0; i < p._grid->oSites(); i++)
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parallel_for(int i = 0; i < p.Grid()->oSites(); i++)
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{
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int permute_type;
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StencilEntry *SE;
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@ -98,23 +102,20 @@ public:
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const vobj *temp, *t_p;
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SE = phiStencil.GetEntry(permute_type, mu, i);
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t_p = &p._odata[i];
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t_p = &p_v[i];
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if (SE->_is_local)
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{
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temp = &p._odata[SE->_offset];
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if (SE->_permute)
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{
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temp = &p_v[SE->_offset];
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if (SE->_permute) {
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permute(temp2, *temp, permute_type);
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action._odata[i] -= temp2 * (*t_p) + (*t_p) * temp2;
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}
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else
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{
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action._odata[i] -= (*temp) * (*t_p) + (*t_p) * (*temp);
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action_v[i] -= temp2 * (*t_p) + (*t_p) * temp2;
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} else {
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action_v[i] -= (*temp) * (*t_p) + (*t_p) * (*temp);
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}
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}
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else
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{
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action._odata[i] -= phiStencil.CommBuf()[SE->_offset] * (*t_p) + (*t_p) * phiStencil.CommBuf()[SE->_offset];
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action_v[i] -= phiStencil.CommBuf()[SE->_offset] * (*t_p) + (*t_p) * phiStencil.CommBuf()[SE->_offset];
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}
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}
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// action -= pshift*p + p*pshift;
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@ -127,12 +128,12 @@ public:
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virtual void deriv(const Field &p, Field &force)
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{
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double t0 = usecond();
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assert(p._grid->Nd() == Ndim);
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assert(p.Grid()->Nd() == Ndim);
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force = (2. * Ndim + mass_square) * p - 2. * lambda * p * p * p;
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double interm_t = usecond();
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// move this outside
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static Stencil phiStencil(p._grid, npoint, 0, directions, displacements);
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static Stencil phiStencil(p.Grid(), npoint, 0, directions, displacements);
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phiStencil.HaloExchange(p, compressor);
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double halo_t = usecond();
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@ -145,59 +146,51 @@ public:
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for (int point = 0; point < npoint; point++)
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{
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#pragma omp parallel
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{
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int permute_type;
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StencilEntry *SE;
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const vobj *temp;
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auto p_v = p.View();
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auto force_v = force.View();
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int permute_type;
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StencilEntry *SE;
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const vobj *temp;
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#pragma omp for schedule(static, chunk)
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for (int i = 0; i < p._grid->oSites(); i++)
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{
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SE = phiStencil.GetEntry(permute_type, point, i);
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// prefetch next p?
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if (SE->_is_local)
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{
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temp = &p._odata[SE->_offset];
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if (SE->_permute)
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{
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parallel_for (int i = 0; i < p.Grid()->oSites(); i++) {
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SE = phiStencil.GetEntry(permute_type, point, i);
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// prefetch next p?
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if (SE->_is_local) {
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temp = &p_v[SE->_offset];
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if (SE->_permute) {
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vobj temp2;
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permute(temp2, *temp, permute_type);
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force._odata[i] -= temp2;
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force_v[i] -= temp2;
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} else {
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force_v[i] -= *temp; // slow part. Dominated by this read/write (BW)
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}
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else
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{
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force._odata[i] -= *temp; // slow part. Dominated by this read/write (BW)
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}
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}
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else
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{
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force._odata[i] -= phiStencil.CommBuf()[SE->_offset];
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} else {
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force_v[i] -= phiStencil.CommBuf()[SE->_offset];
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}
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}
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}
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}
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force *= N / g;
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force *= N / g;
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double t1 = usecond();
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double total_time = (t1 - t0) / 1e6;
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double interm_time = (interm_t - t0) / 1e6;
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double halo_time = (halo_t - interm_t) / 1e6;
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double stencil_time = (t1 - halo_t) / 1e6;
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std::cout << GridLogIntegrator << "Total time for force computation (s) : " << total_time << std::endl;
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std::cout << GridLogIntegrator << "Intermediate time for force computation (s): " << interm_time << std::endl;
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std::cout << GridLogIntegrator << "Halo time in force computation (s) : " << halo_time << std::endl;
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std::cout << GridLogIntegrator << "Stencil time in force computation (s) : " << stencil_time << std::endl;
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double flops = p._grid->gSites() * (14 * N * N * N + 18 * N * N + 2);
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double flops_no_stencil = p._grid->gSites() * (14 * N * N * N + 6 * N * N + 2);
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double Gflops = flops / (total_time * 1e9);
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double Gflops_no_stencil = flops_no_stencil / (interm_time * 1e9);
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std::cout << GridLogIntegrator << "Flops: " << flops << " - Gflop/s : " << Gflops << std::endl;
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std::cout << GridLogIntegrator << "Flops NS: " << flops_no_stencil << " - Gflop/s NS: " << Gflops_no_stencil << std::endl;
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}
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double t1 = usecond();
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double total_time = (t1 - t0) / 1e6;
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double interm_time = (interm_t - t0) / 1e6;
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double halo_time = (halo_t - interm_t) / 1e6;
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double stencil_time = (t1 - halo_t) / 1e6;
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std::cout << GridLogIntegrator << "Total time for force computation (s) : " << total_time << std::endl;
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std::cout << GridLogIntegrator << "Intermediate time for force computation (s): " << interm_time << std::endl;
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std::cout << GridLogIntegrator << "Halo time in force computation (s) : " << halo_time << std::endl;
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std::cout << GridLogIntegrator << "Stencil time in force computation (s) : " << stencil_time << std::endl;
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double flops = p.Grid()->gSites() * (14 * N * N * N + 18 * N * N + 2);
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double flops_no_stencil = p.Grid()->gSites() * (14 * N * N * N + 6 * N * N + 2);
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double Gflops = flops / (total_time * 1e9);
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double Gflops_no_stencil = flops_no_stencil / (interm_time * 1e9);
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std::cout << GridLogIntegrator << "Flops: " << flops << " - Gflop/s : " << Gflops << std::endl;
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std::cout << GridLogIntegrator << "Flops NS: " << flops_no_stencil << " - Gflop/s NS: " << Gflops_no_stencil << std::endl;
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}
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};
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NAMESPACE_END(Grid);
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