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Fix max element guard overflow for CUDA, resolves #136

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This commit is contained in:
Tom Lin 2023-09-22 02:31:14 +01:00
parent 87a38e949d
commit 3dcafd1af1
1 changed files with 14 additions and 10 deletions
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24
src/cuda/CUDAStream.cu
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@ -48,33 +48,37 @@ CUDAStream<T>::CUDAStream(const int ARRAY_SIZE, const int device_index)
// Allocate the host array for partial sums for dot kernels
sums = (T*)malloc(sizeof(T) * DOT_NUM_BLOCKS);
size_t array_bytes = sizeof(T);
array_bytes *= ARRAY_SIZE;
size_t total_bytes = array_bytes * 3;
// Check buffers fit on the device
cudaDeviceProp props;
cudaGetDeviceProperties(&props, 0);
if (props.totalGlobalMem < std::size_t{3}*ARRAY_SIZE*sizeof(T))
if (props.totalGlobalMem < total_bytes)
throw std::runtime_error("Device does not have enough memory for all 3 buffers");
// Create device buffers
#if defined(MANAGED)
cudaMallocManaged(&d_a, ARRAY_SIZE*sizeof(T));
cudaMallocManaged(&d_a, array_bytes);
check_error();
cudaMallocManaged(&d_b, ARRAY_SIZE*sizeof(T));
cudaMallocManaged(&d_b, array_bytes);
check_error();
cudaMallocManaged(&d_c, ARRAY_SIZE*sizeof(T));
cudaMallocManaged(&d_c, array_bytes);
check_error();
cudaMallocManaged(&d_sum, DOT_NUM_BLOCKS*sizeof(T));
check_error();
#elif defined(PAGEFAULT)
d_a = (T*)malloc(sizeof(T)*ARRAY_SIZE);
d_b = (T*)malloc(sizeof(T)*ARRAY_SIZE);
d_c = (T*)malloc(sizeof(T)*ARRAY_SIZE);
d_a = (T*)malloc(array_bytes);
d_b = (T*)malloc(array_bytes);
d_c = (T*)malloc(array_bytes);
d_sum = (T*)malloc(sizeof(T)*DOT_NUM_BLOCKS);
#else
cudaMalloc(&d_a, ARRAY_SIZE*sizeof(T));
cudaMalloc(&d_a, array_bytes);
check_error();
cudaMalloc(&d_b, ARRAY_SIZE*sizeof(T));
cudaMalloc(&d_b, array_bytes);
check_error();
cudaMalloc(&d_c, ARRAY_SIZE*sizeof(T));
cudaMalloc(&d_c, array_bytes);
check_error();
cudaMalloc(&d_sum, DOT_NUM_BLOCKS*sizeof(T));
check_error();