Matrix inverse on CPU

[CrisCristescu]

Hi,

Is it possible to use the MAGMA CPU interface without having a GPU card for matrix inverse calculation?

Thank you!

[mgates3]

First, do you REALLY need an inverse? Or do you actually want to solve a system of equations, which is both faster and more accurate? That is, X = A^{-1} * B is really solving A*X = B, and so should be computed as

Code: Select all

    magma_*gesv( A, B );   // that is, getrf + getrs

NOT as

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  magma_*getrf( A );
  magma_*getri( A );
  magma_*gemm( 1, A, B, 0, X );

Also, I'm confused about your question. If you don't have a GPU, then MAGMA doesn't provide any benefit -- just use LAPACK. The LAPACK interface is very similar to the MAGMA interface.

If you mean, "Is there a MAGMA CPU interface to getri that then uses the GPU?", then no, there is not currently a routine magma_zgetri. It may get added in the future.
-mark