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Refactoring readBlock

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This commit is contained in:
André R. Brodtkorb
2018-08-24 14:11:29 +02:00
parent daa175ef32
commit 92fba5dc4f
8 changed files with 39 additions and 75 deletions
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7
GPUSimulators/FORCE_kernel.cu
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@@ -120,10 +120,9 @@ __global__ void FORCEKernel(
//Read into shared memory
readBlock1(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(h0_ptr_, h0_pitch_, Q[0], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hu0_ptr_, hu0_pitch_, Q[1], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hv0_ptr_, hv0_pitch_, Q[2], nx_+1, ny_+1);
__syncthreads();

7
GPUSimulators/HLL2_kernel.cu
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@@ -166,10 +166,9 @@ __global__ void HLL2Kernel(
//Read into shared memory
readBlock2(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(h0_ptr_, h0_pitch_, Q[0], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hu0_ptr_, hu0_pitch_, Q[1], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hv0_ptr_, hv0_pitch_, Q[2], nx_+3, ny_+3);
__syncthreads();
//Set boundary conditions

7
GPUSimulators/HLL_kernel.cu
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@@ -131,10 +131,9 @@ __global__ void HLLKernel(
//Read into shared memory
readBlock1(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(h0_ptr_, h0_pitch_, Q[0], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hu0_ptr_, hu0_pitch_, Q[1], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hv0_ptr_, hv0_pitch_, Q[2], nx_+1, ny_+1);
__syncthreads();
noFlowBoundary1(Q, nx_, ny_);

7
GPUSimulators/KP07_dimsplit_kernel.cu
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@@ -157,10 +157,9 @@ __global__ void KP07DimsplitKernel(
//Read into shared memory
readBlock2(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(h0_ptr_, h0_pitch_, Q[0], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hu0_ptr_, hu0_pitch_, Q[1], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hv0_ptr_, hv0_pitch_, Q[2], nx_+3, ny_+3);
__syncthreads();

7
GPUSimulators/KP07_kernel.cu
View File

@@ -141,10 +141,9 @@ __global__ void KP07Kernel(
//Read into shared memory
readBlock2(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(h0_ptr_, h0_pitch_, Q[0], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hu0_ptr_, hu0_pitch_, Q[1], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hv0_ptr_, hv0_pitch_, Q[2], nx_+3, ny_+3);
__syncthreads();

7
GPUSimulators/LxF_kernel.cu
View File

@@ -127,10 +127,9 @@ void LxFKernel(
__shared__ float G[3][block_height+1][block_width];
//Read into shared memory
readBlock1(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(h0_ptr_, h0_pitch_, Q[0], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hu0_ptr_, hu0_pitch_, Q[1], nx_+1, ny_+1);
readBlock<BLOCK_WIDTH+2, BLOCK_HEIGHT+2>(hv0_ptr_, hv0_pitch_, Q[2], nx_+1, ny_+1);
__syncthreads();
//Set boundary conditions

7
GPUSimulators/WAF_kernel.cu
View File

@@ -138,10 +138,9 @@ __global__ void WAFKernel(
//Read into shared memory Q from global memory
readBlock2(h0_ptr_, h0_pitch_,
hu0_ptr_, hu0_pitch_,
hv0_ptr_, hv0_pitch_,
Q, nx_, ny_);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(h0_ptr_, h0_pitch_, Q[0], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hu0_ptr_, hu0_pitch_, Q[1], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hv0_ptr_, hv0_pitch_, Q[2], nx_+3, ny_+3);
__syncthreads();

63
GPUSimulators/common.cu
View File

@@ -50,38 +50,29 @@ inline __device__ __host__ float clamp(const float f, const float a, const float
/**
* Reads a block of data with one ghost cell for the shallow water equations
*/
__device__ void readBlock1(float* h_ptr_, int h_pitch_,
float* hu_ptr_, int hu_pitch_,
float* hv_ptr_, int hv_pitch_,
float Q[3][BLOCK_HEIGHT+2][BLOCK_WIDTH+2],
const int nx_, const int ny_) {
//Index of thread within block
const int tx = threadIdx.x;
const int ty = threadIdx.y;
template<int sm_width, int sm_height>
__device__ void readBlock(float* ptr_, int pitch_,
float shmem[sm_height][sm_width],
const int max_x, const int max_y) {
//Index of block within domain
const int bx = BLOCK_WIDTH * blockIdx.x;
const int by = BLOCK_HEIGHT * blockIdx.y;
const int bx = blockDim.x * blockIdx.x;
const int by = blockDim.y * blockIdx.y;
//Read into shared memory
for (int j=ty; j<BLOCK_HEIGHT+2; j+=BLOCK_HEIGHT) {
const int l = clamp(by + j, 0, ny_+1); // Out of bounds
for (int j=threadIdx.y; j<sm_height; j+=blockDim.y) {
const int l = clamp(by + j, 0, max_y); // Clamp out of bounds
//Compute the pointer to current row in the arrays
float* const h_row = (float*) ((char*) h_ptr_ + h_pitch_*l);
float* const hu_row = (float*) ((char*) hu_ptr_ + hu_pitch_*l);
float* const hv_row = (float*) ((char*) hv_ptr_ + hv_pitch_*l);
const float* const row = (float*) ((char*) ptr_ + pitch_*l);
for (int i=tx; i<BLOCK_WIDTH+2; i+=BLOCK_WIDTH) {
const int k = clamp(bx + i, 0, nx_+1); // Out of bounds
for (int i=threadIdx.x; i<sm_width; i+=blockDim.x) {
const int k = clamp(bx + i, 0, max_x); // clamp out of bounds
Q[0][j][i] = h_row[k];
Q[1][j][i] = hu_row[k];
Q[2][j][i] = hv_row[k];
shmem[j][i] = row[k];
}
}
}
@@ -98,36 +89,16 @@ __device__ void readBlock2(float* h_ptr_, int h_pitch_,
float* hv_ptr_, int hv_pitch_,
float Q[3][BLOCK_HEIGHT+4][BLOCK_WIDTH+4],
const int nx_, const int ny_) {
//Index of thread within block
const int tx = threadIdx.x;
const int ty = threadIdx.y;
//Index of block within domain
const int bx = BLOCK_WIDTH * blockIdx.x;
const int by = BLOCK_HEIGHT * blockIdx.y;
//Read into shared memory
for (int j=ty; j<BLOCK_HEIGHT+4; j+=BLOCK_HEIGHT) {
const int l = clamp(by + j, 0, ny_+3); // Out of bounds
//Compute the pointer to current row in the arrays
float* const h_row = (float*) ((char*) h_ptr_ + h_pitch_*l);
float* const hu_row = (float*) ((char*) hu_ptr_ + hu_pitch_*l);
float* const hv_row = (float*) ((char*) hv_ptr_ + hv_pitch_*l);
for (int i=tx; i<BLOCK_WIDTH+4; i+=BLOCK_WIDTH) {
const int k = clamp(bx + i, 0, nx_+3); // Out of bounds
Q[0][j][i] = h_row[k];
Q[1][j][i] = hu_row[k];
Q[2][j][i] = hv_row[k];
}
}
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(h_ptr_, h_pitch_, Q[0], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hu_ptr_, hu_pitch_, Q[1], nx_+3, ny_+3);
readBlock<BLOCK_WIDTH+4, BLOCK_HEIGHT+4>(hv_ptr_, hv_pitch_, Q[2], nx_+3, ny_+3);
}
/**
* Writes a block of data to global memory for the shallow water equations.
*/