NaN errors with dpotrf and dpotrf_gpu

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

Re: NaN errors with dpotrf and dpotrf_gpu

Postby mgates3 » Mon Sep 23, 2013 11:58 am

With magmablas gemm, the matrix C must be initialized to something, even if beta=0. Otherwise any NaNs in C will propagate to the result. CUBLAS gemm may not read C if beta=0, causing any NaNs to be ignored. Don't know if this is the issue that Peter was seeing or not.
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