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Published 20 hours ago • verified publisher icon DrTimothyAldenDavis

Possible bug in the -lblas library on Ubuntu 20.04.

Open DrTimothyAldenDavis opened this issue 2 years ago • 0 comments

Describe the bug Incorrect numerical results for CHOLMOD and SPQR on larger problems when using -lblas on Ubuntu 20.04.

To Reproduce I have not yet replicated the bug.

Expected behavior Low residuals.

Screenshots

Desktop (please complete the following information):

  • OS: Unbuntu 20.04.
  • compiler: any?
  • BLAS and LAPACK library, if applicable: -lblas

Additional context Workaround: use the Intel MKL instead, which fixes this problem completely. I suspect a bug in the BLAS, or perhaps an interface issue (32 bit vs 64 bit integer parameters).

DrTimothyAldenDavis avatar May 03 '22 15:05 DrTimothyAldenDavis