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Zbigniew_L_
Beginner
82 Views

dlange is twice as slow as dnrm2

I was running some tests with dlange with the first argument 'F' (Frobenius norm) for 1000x1000 matrices and I noticed that it is twice as slower as using the same matrix (as a vector) with dnrm2.

Is it expected? I use MKL 11.3.2.
 

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Gennady_F_Intel
Moderator
82 Views

no, this is not expected behavior. is that hotspot for your application?

Gennady_F_Intel
Moderator
82 Views

Zbigniew, the problem is fixed in 2017 u2. this update is released a  few days ago. Could you check and keep us inform how this fix works on your side.

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