topic Yet another issue with the BSR format in Intel® oneAPI Math Kernel Library

Yet another issue with the BSR format

asd__asdqwe — Fri, 18 Nov 2016 03:59:03 GMT

Hello,

Attached, I'm doing y = Ax with A in BSR format (bs = 1, 2, and 3), that has only one nonzero block coefficient. Clearly, the results are wrong with bs = 3.

The first 9 rows must be 0!
10 122
11 302
12 482
13 431
14 782
15 962
16 1142
17 9181
18 34200
19 233919
20 651010
21 589

Can you reproduce this issue? This is with MKL 2017 Update 1. Thank you in advance for fixing your code....

yes, this is the bug. Thanks

Gennady_F_Intel — Fri, 18 Nov 2016 04:49:43 GMT

yes, this is the bug. Thanks for the report.

Some additional

Gennady_F_Intel — Fri, 18 Nov 2016 07:12:59 GMT

Some additional investigations shown that the problem has been introduced for AVX and AVX2+ code of IA only. We will fix it the next ( nearest) update of MKL.

this issue is fixed in MKL

Gennady_F_Intel — Mon, 27 Feb 2017 14:48:40 GMT

this issue is fixed in MKL 2017 update 2. This update is released a few days ago. Please check the update and let us know the result.