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input & output are different
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parent
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33
src/test.cu
33
src/test.cu
@ -8,37 +8,20 @@
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using namespace std;
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///////////////////////////////////////////////////////
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__global__ void gArgMax(float* arr, size_t rows, size_t cols) {
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for (size_t row = 0; row < rows; ++row) {
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size_t startInd = row * cols;
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float maxScore = -99999;
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size_t maxInd = -1;
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for (size_t col = 0; col < cols; ++col) {
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size_t ind = startInd + col;
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float score = arr[ind];
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if (score > maxScore) {
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maxScore = score;
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maxInd = col;
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}
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}
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arr[startInd] = maxInd;
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}
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}
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__global__ void gArgMax2(float* arr, size_t rows, size_t cols) {
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__global__ void gArgMax(float *out, const float *data, size_t rows, size_t cols) {
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size_t row = blockIdx.x;
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size_t startInd = row * cols;
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float maxScore = -99999;
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size_t maxInd = -1;
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for (size_t col = 0; col < cols; ++col) {
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size_t ind = startInd + col;
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float score = arr[ind];
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float score = data[ind];
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if (score > maxScore) {
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maxScore = score;
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maxInd = col;
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}
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}
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arr[startInd] = maxInd;
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out[row] = maxInd;
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}
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string output(const std::vector<float> &vec)
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@ -62,13 +45,19 @@ void temp()
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thrust::copy(hVec.begin(), hVec.end(), dVec.begin());
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float *data = thrust::raw_pointer_cast(dVec.data());
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//gArgMax<<<10, 20, sizeof(float)>>>(data, 4, 2);
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gArgMax2<<<4, 1, sizeof(float)>>>(data, 4, 2);
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thrust::device_vector<float> dLabel(4);
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float *labelPtr = thrust::raw_pointer_cast(dLabel.data());
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gArgMax<<<4, 1, sizeof(float)>>>(labelPtr, data, 4, 2);
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std::vector<float> hVec2(8);
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thrust::copy(dVec.begin(), dVec.end(), hVec2.begin());
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cerr << "hVec2=" << output(hVec2) << endl;
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std::vector<float> hLabel(4);
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thrust::copy(dLabel.begin(), dLabel.end(), hLabel.begin());
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cerr << "hLabel=" << output(hLabel) << endl;
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exit(0);
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}
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