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]> 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] > <[email protected]>* > > [image: cid:[email protected]] > > BASF Agricultural Solutions Belgium NV, Registered Office: 9052 Gent, > Belgium > > Registration: RPR Gent: 0685.756.742 > > >
