Looking up the error numbers

Open discussion for MAGMA library (Matrix Algebra on GPU and Multicore Architectures)

Looking up the error numbers

Postby wfchiang » Thu Jul 14, 2016 3:40 pm

Hello sir,

I got some error messages as follows:

magma_sgetrf_gpu returned error 8: function-specific error, see documentation.

magma_sgetrf_gpu returned error 4: function-specific error, see documentation.

magma_sgetrf_gpu returned error 1: function-specific error, see documentation.

I wonder what do the error numbers mean (8,4 and 1)?
Also, where should I go and check the meaning of the error numbers?

Thanks.
Wei-Fan
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Re: Looking up the error numbers

Postby mgates3 » Fri Jul 15, 2016 12:24 pm

You can find the documentation online.
http://icl.cs.utk.edu/projectsfiles/magma/doxygen/
http://icl.cs.utk.edu/projectsfiles/mag ... 4fec8d2d12

There in the dgetrf_gpu documentation, it states:

[out] info INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value or another error occured, such as memory allocation failed.
> 0: if INFO = i, U(i,i) is exactly zero. The factorization has been completed, but the factor U is exactly singular, and division by zero will occur if it is used to solve a system of equations.

Thus it appears that the matrix is singular.

-mark
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