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Refactoring

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This commit is contained in:
André R. Brodtkorb
2018-11-01 15:17:13 +01:00
parent 064027fc0b
commit 2b899d1c80
10 changed files with 234 additions and 194 deletions
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70
GPUSimulators/cuda/SWE2D_KP07_dimsplit.cu
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@@ -38,39 +38,37 @@ void computeFluxF(float Q[3][BLOCK_HEIGHT+4][BLOCK_WIDTH+4],
const int tx = threadIdx.x;
const int ty = threadIdx.y;
{
int j=ty;
const int l = j + 2; //Skip ghost cells
for (int i=tx; i<BLOCK_WIDTH+1; i+=BLOCK_WIDTH) {
const int k = i + 1;
// Reconstruct point values of Q at the left and right hand side
// of the cell for both the left (i) and right (i+1) cell
const float3 Q_rl = make_float3(Q[0][l][k+1] - 0.5f*Qx[0][j][i+1],
Q[1][l][k+1] - 0.5f*Qx[1][j][i+1],
Q[2][l][k+1] - 0.5f*Qx[2][j][i+1]);
const float3 Q_rr = make_float3(Q[0][l][k+1] + 0.5f*Qx[0][j][i+1],
Q[1][l][k+1] + 0.5f*Qx[1][j][i+1],
Q[2][l][k+1] + 0.5f*Qx[2][j][i+1]);
const float3 Q_ll = make_float3(Q[0][l][k] - 0.5f*Qx[0][j][i],
Q[1][l][k] - 0.5f*Qx[1][j][i],
Q[2][l][k] - 0.5f*Qx[2][j][i]);
const float3 Q_lr = make_float3(Q[0][l][k] + 0.5f*Qx[0][j][i],
Q[1][l][k] + 0.5f*Qx[1][j][i],
Q[2][l][k] + 0.5f*Qx[2][j][i]);
//Evolve half a timestep (predictor step)
const float3 Q_r_bar = Q_rl + dt_/(2.0f*dx_) * (F_func(Q_rl, g_) - F_func(Q_rr, g_));
const float3 Q_l_bar = Q_lr + dt_/(2.0f*dx_) * (F_func(Q_ll, g_) - F_func(Q_lr, g_));
int j=ty;
const int l = j + 2; //Skip ghost cells
for (int i=tx; i<BLOCK_WIDTH+1; i+=BLOCK_WIDTH) {
const int k = i + 1;
// Reconstruct point values of Q at the left and right hand side
// of the cell for both the left (i) and right (i+1) cell
const float3 Q_rl = make_float3(Q[0][l][k+1] - 0.5f*Qx[0][j][i+1],
Q[1][l][k+1] - 0.5f*Qx[1][j][i+1],
Q[2][l][k+1] - 0.5f*Qx[2][j][i+1]);
const float3 Q_rr = make_float3(Q[0][l][k+1] + 0.5f*Qx[0][j][i+1],
Q[1][l][k+1] + 0.5f*Qx[1][j][i+1],
Q[2][l][k+1] + 0.5f*Qx[2][j][i+1]);
const float3 Q_ll = make_float3(Q[0][l][k] - 0.5f*Qx[0][j][i],
Q[1][l][k] - 0.5f*Qx[1][j][i],
Q[2][l][k] - 0.5f*Qx[2][j][i]);
const float3 Q_lr = make_float3(Q[0][l][k] + 0.5f*Qx[0][j][i],
Q[1][l][k] + 0.5f*Qx[1][j][i],
Q[2][l][k] + 0.5f*Qx[2][j][i]);
//Evolve half a timestep (predictor step)
const float3 Q_r_bar = Q_rl + dt_/(2.0f*dx_) * (F_func(Q_rl, g_) - F_func(Q_rr, g_));
const float3 Q_l_bar = Q_lr + dt_/(2.0f*dx_) * (F_func(Q_ll, g_) - F_func(Q_lr, g_));
// Compute flux based on prediction
const float3 flux = CentralUpwindFlux(Q_l_bar, Q_r_bar, g_);
//Write to shared memory
F[0][j][i] = flux.x;
F[1][j][i] = flux.y;
F[2][j][i] = flux.z;
}
// Compute flux based on prediction
const float3 flux = CentralUpwindFlux(Q_l_bar, Q_r_bar, g_);
//Write to shared memory
F[0][j][i] = flux.x;
F[1][j][i] = flux.y;
F[2][j][i] = flux.z;
}
}
@@ -178,7 +176,7 @@ __global__ void KP07DimsplitKernel(
//Step 0 => evolve x first, then y
if (step_ == 0) {
//Compute fluxes along the x axis and evolve
minmodSlopeX(Q, Qx, theta_);
minmodSlopeX<w, h, gc, vars>(Q, Qx, theta_);
__syncthreads();
computeFluxF(Q, Qx, F, g_, dx_, dt_);
__syncthreads();
@@ -194,7 +192,7 @@ __global__ void KP07DimsplitKernel(
//Compute fluxes along the y axis and evolve
minmodSlopeY(Q, Qx, theta_);
minmodSlopeY<w, h, gc, vars>(Q, Qx, theta_);
__syncthreads();
computeFluxG(Q, Qx, F, g_, dy_, dt_);
@@ -205,7 +203,7 @@ __global__ void KP07DimsplitKernel(
//Step 1 => evolve y first, then x
else {
//Compute fluxes along the y axis and evolve
minmodSlopeY(Q, Qx, theta_);
minmodSlopeY<w, h, gc, vars>(Q, Qx, theta_);
__syncthreads();
computeFluxG(Q, Qx, F, g_, dy_, dt_);
__syncthreads();
@@ -219,7 +217,7 @@ __global__ void KP07DimsplitKernel(
__syncthreads();
//Compute fluxes along the x axis and evolve
minmodSlopeX(Q, Qx, theta_);
minmodSlopeX<w, h, gc, vars>(Q, Qx, theta_);
__syncthreads();
computeFluxF(Q, Qx, F, g_, dx_, dt_);
__syncthreads();