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working buffering

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Robin
2024-12-26 12:33:07 +01:00
parent 109566d7b6
commit c4a2ce1b44
13 changed files with 187 additions and 155 deletions
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58
src/main.cu
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@@ -1,5 +1,5 @@
// #include "hurricanedata/fielddata.h"
// #include "hurricanedata/gpubufferhandler.h"
#include "hurricanedata/gpubufferhandler.h"
#include "hurricanedata/datareader.h"
#include "hurricanedata/gpubuffer.h"
@@ -10,32 +10,9 @@
#include <memory>
#include <iomanip>
// Not parallel computation
// __global__ void computeMean(float *ans, const FieldMetadata &fmd, FieldData fd) {
// float sum = 0;
// size_t num_not_masked_values = 0;
// for (int i = 0; i < fmd.widthSize; i++) {
// double xi = getVal(fmd, fd, 2, 20, 100, i);
// if (xi < 1E14) { /* If x is not missing value */
// num_not_masked_values++;
// sum += xi;
// }
// }
// *ans = sum/num_not_masked_values;
// }
__global__ void computeMean(float *ans, DataHandle dh) {
float sum = 0;
size_t num_not_masked_values = 0;
for (int i = 0; i < dh.size; i++) {
double xi = dh.d_data[i];
if (xi < 1E14) { /* If x is not missing value */
num_not_masked_values++;
sum += xi;
}
}
*ans = sum/num_not_masked_values;
__global__ void getSingleValue(float *ans, const FieldMetadata &fmd, FieldData fd) {
float xi = getVal(fmd, fd, 1, 20, 100, 100);
*ans = xi;
}
int main() {
@@ -52,29 +29,26 @@ int main() {
std::cout << "created buffer\n";
auto dataHandle = buffer.getDataHandle(0);
GPUBufferHandler bufferHandler(buffer);
std::cout << "got a data handle\n";
std::cout << "created buffer handler\n";
auto x = buffer.getAxis<int>(0, "time");
std::cout << "size of x=" << x.first << "\n";
std::cout << "x[1]= " <<x.second[1] << "\n";
auto fd = bufferHandler.nextFieldData();
std::cout << "aquired field\n";
// GPUBufferHandler buffer{path, variable};
float *ptr_test_read;
cudaMallocManaged(&ptr_test_read, sizeof(float));
// auto fd = buffer.nextFieldData();
float *ptr_mean;
cudaMallocManaged(&ptr_mean, sizeof(float));
computeMean<<<1, 1>>>(ptr_mean, dataHandle);
getSingleValue<<<1, 1>>>(ptr_test_read, *bufferHandler.fmd, fd);
cudaDeviceSynchronize();
std::cout << "Mean = " << std::fixed << std::setprecision(6) << *ptr_mean << "\n";
std::cout << "ptr_test_read = " << std::fixed << std::setprecision(6) << *ptr_test_read << "\n";
// cudaFree(fd.valArrays[0]);
cudaFree(ptr_mean);
// TODO: Write a example loop using buffering and measure it.
cudaFree(fd.valArrays[0]); // TODO: Free data properly in FieldData (maybe make an iterator)
cudaFree(ptr_test_read);
return 0;
}