topic Thanks Marius. Robert in Intel® oneAPI Math Kernel Library

VML 32-bit/64-bit performance

Robert_E_1 — Tue, 06 Dec 2016 22:08:30 GMT

Can you tell me if the VML performance tables at https://software.intel.com/sites/products/documentation/doclib/mkl/vm/functions/_performanceall.html were measured using the 32-bit mode or the 64-bit mode of the processor?

Hi Robert,

Zhen_Z_Intel — Wed, 07 Dec 2016 07:49:58 GMT

Hi Robert,

I've took your thread and still investigate on it. I notice you created a new ticket with similar issues. May I close the new one and answer it in this thread?

Best regards,
Fiona

Hi Fiona -- By "new ticket"

Robert_E_1 — Wed, 07 Dec 2016 16:35:16 GMT

Hi Fiona -- By "new ticket" do you mean "Accuracy/performance of Intel Math Library"? This is about a different library, so it may be a bit confusing to others if it is answered under this thread. But I have no objection if you wish to do so. Robert

Hello Robert,

Marius_C_Intel — Fri, 09 Dec 2016 02:17:22 GMT

Hello Robert,

The numbers posted are of 64-bit mode

Marius

Hi Marius -- Thanks very much

Robert_E_1 — Fri, 09 Dec 2016 16:33:36 GMT

Hi Marius -- Thanks very much for the reply. Would you be able to tell me whether you expect similar performance from the 32-bit version of the VML library, or would there be significant differences?

Robert,

Marius_C_Intel — Tue, 13 Dec 2016 02:13:05 GMT

Robert,

Yes, I would expect similar numbers. However, at least for some functions I would expect somewhat (but not drastically) lower performance in 32-bit mode than in 64-bit, mainly because in 32-bit mode fewer registers are used, and some will be of smaller size.

Marius

Thanks Marius. Robert

Robert_E_1 — Tue, 13 Dec 2016 16:38:45 GMT

Thanks Marius. Robert