We have a bug report for various OpenBLAS versions too, but I haven't had time to invesstigate it.
Parts of it may be SkylakeX related. On 5/7/19 6:32 PM, Mikael Öhman wrote: > Hi Thomas, > > I can also confirm these issues. I tried rebuilding OpenBLAS+R after the > fix in #7180, but I still saw the same problems. > Very large matrix-matrix multiplications randomly gave the wrong result. > Very large errors. The larger the matrix, the more frequent the errors. > > In the end, I compiled an intel-version (but I had to remove a few > extensions that didn't build) and removed my Foss version from our > installations. > > Perhaps it's related to hardware; I saw this on happen skylake servers. > I haven't had time to check if this > https://github.com/easybuilders/easybuild-easyconfigs/issues/8197 > also affects 0.3.1 > > Best regards, Mikael > > > On Tue, May 7, 2019 at 6:12 PM Thomas Eylenbosch > <[email protected] > <mailto:[email protected]>> wrote: > > Hello____ > > __ __ > > Some of our end users reported a calculation issue with matrices > when they are working with a foss/2018b module____ > > __ __ > > I reproduced this error with Python and R that are compiled with the > foss/2018b toolchain, the output returns unexcepted results. ____ > > Then I reproduced this error with Python and R that are compiled > with the foss/2016b toolchain , then it gives me the expected > behavior. ____ > > __ __ > > You can reproduce this error with the following github repository: ____ > > https://github.com/eylenth/Openblas_matrix_issue____ > > __ __ > > I have also tried to recompile the OpenBLAS-0.3.1-GCC-7.3.0-2.30.eb > easyconfig file with “toolchainopts = {'vectorize': False}” ( cfr. > https://github.com/easybuilders/easybuild-easyconfigs/issues/7180)____ > > But is still giving me unexpected behavior____ > > __ __ > > Can someone try to reproduce the error with the R/Python(foss/2018b) > modules. Or can someone give me feedback on this?____ > > __ __ > > Thank you in advance. ____ > > __ __ > > Met vriendelijke groet / Kind regards / Beste Grüße*____* > > *Thomas Eylenbosch____* > > /Ext: Gluo N.V.//____/ > > __ __ > > BASF Agricultural Solutions Belgium NV____ > > Technologiepark 101____ > > B-9052 Ghent (Zwijnaarde)____ > > BELGIUM____ > > E-mail: *[email protected] > <mailto:[email protected]>*____ > > cid:[email protected]____ > > BASF Agricultural Solutions Belgium NV, Registered Office: 9052 > Gent, Belgium____ > > Registration: RPR Gent: 0685.756.742____ > > __ __ > -- Ake Sandgren, HPC2N, Umea University, S-90187 Umea, Sweden Internet: [email protected] Phone: +46 90 7866134 Fax: +46 90-580 14 Mobile: +46 70 7716134 WWW: http://www.hpc2n.umu.se
