Half GETRF time is higher than Double GETRF

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Nima Sahraneshin

Sep 17, 2020, 3:56:25 PM9/17/20
to MAGMA User

I am working with MAGMA on Volta GPU and its strange for me to see the time of running hgetrf is higher than dgetrf. I have tested the same code on P100 and it was OK but here I am seeing something else. 

Do you have any recommendations? What is the most accurate method of timing? 

Best regards, Nima

Mark Gates

Sep 17, 2020, 4:23:20 PM9/17/20
to Nima Sahraneshin, MAGMA User
Can you give a specific example, so we can understand and replicate your results? Knowing your machine configuration (e.g., CPU, # cores/threads, GPU, BLAS/LAPACK library, CUDA version) is helpful. Especially if you can provide an example using MAGMA's testers, that is helpful. Please include complete input & output, as that provides valuable information, including some of the above.


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Innovative Computing Laboratory
University of Tennessee, Knoxville
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