magma_dgesv_batched_small

[Xuanhao Bao]

Hi all,

I'm trying to use Magma to solve a batch of Ax = b problems.

What are the differences between magma_dgesv_batched and magma_dgesv_batched_small? If magma_dgesv_batched_small is designed for faster batch solving of small matrices, what size is considered a small matrix in Magma? Is it 20x20? 50x50? 

Best wishes,

Xuanhao

[Ahmad Abdelfattah]

Hi, 

The short answer is: you should use magma_dgesv_batched. It calls magma_dgesv_batched_small underneath if the matrices are very small and there is only one right hand side to solve. Right now, the internal tuning for magma_dgesv_batched_small seems to support up to 60x60 systems. 

Ahmad

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