cuda - Query regarding cusparseSolveAnalysisInfo_t

Question

I need to solve Ax=B multiple times and cusparseSolveAnalysisInfo_t is taking huge time inside the loop.

What does cusparseSolveAnalysisInfo_t do in the solution of AX=B? According to the documentation I can create it once and use it for different sets of B. What if I want to use it for different sets of A with the same Sparse structure.

Answer 1

参考文档，将info类型的结构cusparseSolveAnalysisInfo_t传递给分析函数，以捕获分析函数创建的数据。然后将其传递（不变）到求解函数以指导求解器。

您可以在这个cuda 示例中看到一个示例用法。

如果更改 A，则必须重新创建它（即，如果更改 A，则必须重新运行分析步骤）。