topic Incorrect results returned by cblas_zhemv and cblas_zgerc in Intel® oneAPI Math Kernel Library

Incorrect results returned by cblas_zhemv and cblas_zgerc

xearthl — Fri, 06 Nov 2009 09:29:02 GMT

I've found in my work that cblas_zhemv and cblas_zgerc will return incorrect results in some cases when incX and incY are not set to 1. I'm using MKL 10.2.2.025 and link to mkl_solver.lib, mkl_intel_c_dll.lib, mkl_intel_thread_dll.lib, mkl_core_dll.lib in the folder ia32. Is this a known issue? You may find a typical case in the attached .cpp file.

Re: Incorrect results returned by cblas_zhemv and cblas_zgerc

Vladimir_Koldakov__I — Fri, 13 Nov 2009 03:32:36 GMT

Hi xearthl,

Thank you for the detailed test. It's very useful to understand the problem.

-Vladimir

Re: Incorrect results returned by cblas_zhemv and cblas_zgerc

Gennady_F_Intel — Fri, 13 Nov 2009 08:54:02 GMT

Quoting - xearthl

xearthl,
yes, this an known issue and this issue has been already fixed. The fix will available the nearest update ( MKL 10.2 Update 3) coming soon.
we'll inform you about that through this tread and/or see the announcement on this forum.
--Gennady

Re: Incorrect results returned by cblas_zhemv and cblas_zgerc

Gennady_F_Intel — Tue, 22 Dec 2009 15:34:32 GMT

Quoting - Gennady Fedorov (Intel)

Hello xearthl,
Intel MKL 10.2 Update 3 is now available.
The problem discussed into this tread has been fixed into this update.
Please see the Intel MKL 10.2 Update 3 is now available announce. You can find there the link to the Intel registration center to download
Could you please let us know if the problem is still exists?
--Gennady