ArrayFire C++稀疏矩阵乘法触发访问违例问题求助

云上老周

2026-7-16

ArrayFire稀疏矩阵乘法触发af.dll访问违例(错误码0xC0000005)

问题描述

使用ArrayFire处理稀疏矩阵时，af.dll内部触发访问违例（错误码0xC0000005），该问题在CUDA和CPU后端均可复现。执行稀疏矩阵与自身相乘，或与非稀疏矩阵相乘时均会失败。

测试代码

af::info();
af_print(af::randu(5, 4));

float v[]   = {5, 8, 3, 6};
int r[]     = {0, 0, 2, 3, 4};
int c[]     = {0, 1, 2, 1};
const int M = 4, N = 4, nnz = 4;
af::array vals    = af::array(af::dim4(nnz), v);
af::array row_ptr = af::array(af::dim4(M + 1), r);
af::array col_idx = af::array(af::dim4(nnz), c);
 
af_print(vals);
af_print(row_ptr);
af_print(col_idx);

// Create sparse array (CSR) from af::arrays containing values,
// row pointers, and column indices.
auto sparseM = af::sparse(M, N, vals, row_ptr, col_idx, AF_STORAGE_CSR);
af_print(sparseM);

auto res = sparseM * sparseM;
af_print(res);