Pivot threshold for getrf fcns - Intel Community

Intel® oneAPI Math Kernel Library

Ask questions and share information with other developers who use Intel® Math Kernel Library.

Pivot threshold for getrf fcns

583 Views

Is there any documentation that explains that this threshold is? Is there any external control? We are seeing far more pivoting using these functions that our own code.

Link Copied

1 Reply

583 Views

Hi,

There isn't any threshold in getrf. The algorithm is just looking for the maximal element in a column and places it to diagonal before factorizing this column.

--Vipin

Copy link

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.