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Implemented proper boundary conditions handling

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This commit is contained in:
André R. Brodtkorb
2018-11-08 22:07:31 +01:00
parent fd337e7d53
commit bdf7b4292c
5 changed files with 401229 additions and 456 deletions
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44
GPUSimulators/cuda/EE2D_KP07_dimsplit.cu
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@@ -156,17 +156,11 @@ __global__ void KP07DimsplitKernel(
__shared__ float F[4][h+4][w+4];
//Read into shared memory
readBlock<w, h, gc>( rho0_ptr_, rho0_pitch_, Q[0], nx_, ny_);
readBlock<w, h, gc>(rho_u0_ptr_, rho_u0_pitch_, Q[1], nx_, ny_);
readBlock<w, h, gc>(rho_v0_ptr_, rho_v0_pitch_, Q[2], nx_, ny_);
readBlock<w, h, gc>( E0_ptr_, E0_pitch_, Q[3], nx_, ny_);
readBlock<w, h, gc, 1, 1>( rho0_ptr_, rho0_pitch_, Q[0], nx_, ny_, boundary_conditions_);
readBlock<w, h, gc, 1, -1>(rho_u0_ptr_, rho_u0_pitch_, Q[1], nx_, ny_, boundary_conditions_);
readBlock<w, h, gc, -1, 1>(rho_v0_ptr_, rho_v0_pitch_, Q[2], nx_, ny_, boundary_conditions_);
readBlock<w, h, gc, 1, 1>( E0_ptr_, E0_pitch_, Q[3], nx_, ny_, boundary_conditions_);
__syncthreads();
//Fix boundary conditions
noFlowBoundary<w, h, gc, 1, 1>(Q[0], nx_, ny_);
noFlowBoundary<w, h, gc, -1, 1>(Q[1], nx_, ny_);
noFlowBoundary<w, h, gc, 1, -1>(Q[2], nx_, ny_);
noFlowBoundary<w, h, gc, 1, 1>(Q[3], nx_, ny_);
//Step 0 => evolve x first, then y
@@ -185,7 +179,6 @@ __global__ void KP07DimsplitKernel(
minmodSlopeY<w, h, gc, vars>(Q, Qx, theta_);
__syncthreads();
computeFluxG(Q, Qx, F, gamma_, dy_, dt_);
__syncthreads();
@@ -236,24 +229,21 @@ __global__ void KP07DimsplitKernel(
//This is the RK2-part
if (getOrder(step_order_) == 2) {
const int tx = threadIdx.x + gc;
const int ty = threadIdx.y + gc;
const float q1 = Q[0][ty][tx];
const float q2 = Q[1][ty][tx];
const float q3 = Q[2][ty][tx];
const float q4 = Q[3][ty][tx];
__syncthreads();
const int i = threadIdx.x + gc;
const int j = threadIdx.y + gc;
const int tx = blockDim.x*blockIdx.x + i;
const int ty = blockDim.y*blockIdx.y + j;
readBlock<w, h, gc>( rho1_ptr_, rho1_pitch_, Q[0], nx_, ny_);
readBlock<w, h, gc>(rho_u1_ptr_, rho_u1_pitch_, Q[1], nx_, ny_);
readBlock<w, h, gc>(rho_v1_ptr_, rho_v1_pitch_, Q[2], nx_, ny_);
readBlock<w, h, gc>( E1_ptr_, E1_pitch_, Q[3], nx_, ny_);
__syncthreads();
const float q1 = ((float*) ((char*) rho1_ptr_ + rho1_pitch_*ty))[tx];
const float q2 = ((float*) ((char*) rho_u1_ptr_ + rho_u1_pitch_*ty))[tx];
const float q3 = ((float*) ((char*) rho_v1_ptr_ + rho_v1_pitch_*ty))[tx];
const float q4 = ((float*) ((char*) E1_ptr_ + E1_pitch_*ty))[tx];
Q[0][ty][tx] = 0.5f*( Q[0][ty][tx] + q1 );
Q[1][ty][tx] = 0.5f*( Q[1][ty][tx] + q2 );
Q[2][ty][tx] = 0.5f*( Q[2][ty][tx] + q3 );
Q[3][ty][tx] = 0.5f*( Q[3][ty][tx] + q4 );
Q[0][j][i] = 0.5f*( Q[0][j][i] + q1 );
Q[1][j][i] = 0.5f*( Q[1][j][i] + q2 );
Q[2][j][i] = 0.5f*( Q[2][j][i] + q3 );
Q[3][j][i] = 0.5f*( Q[3][j][i] + q4 );
__syncthreads();
}
}