hipblasLtMatmul api usage

Question

hipblasLtMatmul api usage

Opened this issue a year ago · 2 comments

Cydia2018 commented a year ago

I would like to ask whether it is necessary to callhipblasLtMatmulAlgoGetHeuristic() to search algo before executing hipblasLtMatmul()?
When I set the three parameters of hipblasLtMatmulAlgo_t *algo, void *workspace, size_t workspaceSizeInBytes of hipblasLtMatmul() to nullptr, nullptr, and 0 respectively, the segment fault occurred.

Answer 1 · 2023-09-12T03:31:20.000Z

Yes, it is necessary. Here is the sample,
https://github.com/ROCmSoftwarePlatform/hipBLASLt/blob/a103f27d91f0dcd3abdcf262c18a601172b2d3ea/clients/samples/gemm/sample_hipblaslt_gemm.cpp#L153

or you can use getAllAlgos to get the solutions.
https://github.com/ROCmSoftwarePlatform/hipBLASLt/blob/a103f27d91f0dcd3abdcf262c18a601172b2d3ea/clients/samples/gemm_get_all_algos/sample_hipblaslt_gemm_get_all_algos.cpp#L103

Answer 2 · 2024-07-09T15:36:24.000Z

@Cydia2018 Do you still need assistance with this ticket? If not, please close the ticket? Thanks!