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Refactoring - broke 2nd order

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This commit is contained in:
André R. Brodtkorb
2018-11-09 11:46:34 +01:00
parent 812ebcc9ba
commit e98ae0a979
21 changed files with 499023 additions and 611 deletions
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77
GPUSimulators/cuda/common.h
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@@ -134,14 +134,19 @@ inline __device__ BoundaryCondition getBCWest(int bc_) {
template<int block_width, int block_height, int ghost_cells>
/**
* Alter the index l so that it gives periodic boundary conditions when reading
*/
template<int ghost_cells>
inline __device__ int handlePeriodicBoundaryX(int k, int nx_, int boundary_conditions_) {
const int gc_pad = 2*ghost_cells;
//West boundary: add an offset to read from east of domain
if ((k < gc_pad)
&& getBCWest(boundary_conditions_) == Periodic) {
k += (nx_+2*ghost_cells - 2*gc_pad);
}
//East boundary: subtract an offset to read from west of domain
else if ((k >= nx_+2*ghost_cells-gc_pad)
&& getBCEast(boundary_conditions_) == Periodic) {
k -= (nx_+2*ghost_cells - 2*gc_pad);
@@ -150,14 +155,19 @@ inline __device__ int handlePeriodicBoundaryX(int k, int nx_, int boundary_condi
return k;
}
template<int block_width, int block_height, int ghost_cells>
/**
* Alter the index l so that it gives periodic boundary conditions when reading
*/
template<int ghost_cells>
inline __device__ int handlePeriodicBoundaryY(int l, int ny_, int boundary_conditions_) {
const int gc_pad = 2*ghost_cells;
//South boundary: add an offset to read from north of domain
if ((l < gc_pad)
&& getBCSouth(boundary_conditions_) == Periodic) {
l += (ny_+2*ghost_cells - 2*gc_pad);
}
//North boundary: subtract an offset to read from south of domain
else if ((l >= ny_+2*ghost_cells-gc_pad)
&& getBCNorth(boundary_conditions_) == Periodic) {
l -= (ny_+2*ghost_cells - 2*gc_pad);
@@ -165,12 +175,36 @@ inline __device__ int handlePeriodicBoundaryY(int l, int ny_, int boundary_condi
return l;
}
template<int block_width, int block_height, int ghost_cells, int sign_x, int sign_y>
inline __device__ int handleReflectiveBoundary(
float Q[block_height+2*ghost_cells][block_width+2*ghost_cells],
const int nx_, const int ny_,
const int boundary_conditions_) {
//Handle reflective boundary conditions
if (getBCNorth(boundary_conditions_) == Reflective) {
bcNorthReflective<block_width, block_height, ghost_cells, sign_y>(Q, nx_, ny_);
__syncthreads();
}
if (getBCSouth(boundary_conditions_) == Reflective) {
bcSouthReflective<block_width, block_height, ghost_cells, sign_y>(Q, nx_, ny_);
__syncthreads();
}
if (getBCEast(boundary_conditions_) == Reflective) {
bcEastReflective<block_width, block_height, ghost_cells, sign_x>(Q, nx_, ny_);
__syncthreads();
}
if (getBCWest(boundary_conditions_) == Reflective) {
bcWestReflective<block_width, block_height, ghost_cells, sign_x>(Q, nx_, ny_);
__syncthreads();
}
}
/**
* Reads a block of data with ghost cells
*/
template<int block_width, int block_height, int ghost_cells, int sign_north_south, int sign_east_west>
template<int block_width, int block_height, int ghost_cells, int sign_x, int sign_y>
inline __device__ void readBlock(float* ptr_, int pitch_,
float Q[block_height+2*ghost_cells][block_width+2*ghost_cells],
const int nx_, const int ny_,
@@ -183,13 +217,13 @@ inline __device__ void readBlock(float* ptr_, int pitch_,
//Loop over all variables
for (int j=threadIdx.y; j<block_height+2*ghost_cells; j+=block_height) {
//Handle periodic boundary conditions here
int l = handlePeriodicBoundaryY<block_width, block_height, ghost_cells>(by + j, ny_, boundary_conditions_);
int l = handlePeriodicBoundaryY<ghost_cells>(by + j, ny_, boundary_conditions_);
l = min(l, ny_+2*ghost_cells-1);
float* row = (float*) ((char*) ptr_ + pitch_*l);
for (int i=threadIdx.x; i<block_width+2*ghost_cells; i+=block_width) {
//Handle periodic boundary conditions here
int k = handlePeriodicBoundaryX<block_width, block_height, ghost_cells>(bx + i, nx_, boundary_conditions_);
int k = handlePeriodicBoundaryX<ghost_cells>(bx + i, nx_, boundary_conditions_);
k = min(k, nx_+2*ghost_cells-1);
//Read from global memory
@@ -198,23 +232,7 @@ inline __device__ void readBlock(float* ptr_, int pitch_,
}
__syncthreads();
//Handle reflective boundary conditions
if (getBCNorth(boundary_conditions_) == Reflective) {
bcNorthReflective<block_width, block_height, ghost_cells, sign_north_south>(Q, nx_, ny_);
__syncthreads();
}
if (getBCSouth(boundary_conditions_) == Reflective) {
bcSouthReflective<block_width, block_height, ghost_cells, sign_north_south>(Q, nx_, ny_);
__syncthreads();
}
if (getBCEast(boundary_conditions_) == Reflective) {
bcEastReflective<block_width, block_height, ghost_cells, sign_east_west>(Q, nx_, ny_);
__syncthreads();
}
if (getBCWest(boundary_conditions_) == Reflective) {
bcWestReflective<block_width, block_height, ghost_cells, sign_east_west>(Q, nx_, ny_);
__syncthreads();
}
handleReflectiveBoundary<block_width, block_height, ghost_cells, sign_x, sign_y>(Q, nx_, ny_, boundary_conditions_);
}
@@ -226,7 +244,8 @@ inline __device__ void readBlock(float* ptr_, int pitch_,
template<int block_width, int block_height, int ghost_cells>
inline __device__ void writeBlock(float* ptr_, int pitch_,
float shmem[block_height+2*ghost_cells][block_width+2*ghost_cells],
const int width, const int height) {
const int width, const int height,
int rk_step_, int rk_order_) {
//Index of cell within domain
const int ti = blockDim.x*blockIdx.x + threadIdx.x + ghost_cells;
@@ -239,7 +258,14 @@ inline __device__ void writeBlock(float* ptr_, int pitch_,
const int ty = threadIdx.y + ghost_cells;
float* const row = (float*) ((char*) ptr_ + pitch_*tj);
row[ti] = shmem[ty][tx];
//Handle runge-kutta timestepping here
if (rk_order_ == 2 && rk_step_ == 1) {
row[ti] = 0.5f*(row[ti] + shmem[ty][tx]);
}
else {
row[ti] = shmem[ty][tx];
}
}
}
@@ -255,6 +281,7 @@ inline __device__ void writeBlock(float* ptr_, int pitch_,
// West boundary
template<int block_width, int block_height, int ghost_cells, int sign>
__device__ void bcWestReflective(float Q[block_height+2*ghost_cells][block_width+2*ghost_cells], const int nx_, const int ny_) {