Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-03-01 Thread Sébastien Villemot
Control: retitle -1 octave: gives wrong results when used with MKL Le vendredi 01 mars 2019 à 01:41 +, Mo Zhou a écrit : > On Sun, Feb 03, 2019 at 12:07:20PM +, Mo Zhou wrote: > > It turns out that the incorrect matrix product is a result of > > gomp + iomp library clash: octave is linked

Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-02-28 Thread Mo Zhou
Hi Sébastien, On Sun, Feb 03, 2019 at 12:07:20PM +, Mo Zhou wrote: > It turns out that the incorrect matrix product is a result of > gomp + iomp library clash: octave is linked against the GNU OMP, > while libmkl-rt.so invokes Intel(LLVM) OMP by default. I got in touch with MKL team and they

Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-02-03 Thread Mike Miller
On Sun, Feb 03, 2019 at 12:07:20 +, Mo Zhou wrote: > control: severity -1 important Severity minor because it is only caused by installation of an unrelated package from non-free? > I tried to reproduce this issue in a docker container. It seems that > the problem only occurs after the instal

Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-02-03 Thread Mo Zhou
control: severity -1 important Hi Sébastien and Sylvestre, On Sun, Feb 03, 2019 at 10:16:05AM +0100, Sébastien Villemot wrote: > Control: tags -1 unreproducible > > Dear Lumin, > > I've tried to reproduce the problem with Netlib BLAS, OpenBLAS and > BLIS, but without success (I did not try with

Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-02-03 Thread Sébastien Villemot
Control: tags -1 unreproducible Dear Lumin, Le dimanche 03 février 2019 à 03:36 +, Mo Zhou a écrit : > Package: octave > Version: 4.4.1-4 > Severity: grave > > X-Debbugs-CC: debian-scie...@lists.debian.org, ido...@neto.net.il > > I received an astonishing bug report[1] saying that MKL return

Bug#921207: Octave GEMM error on large matrix due to openmp thread race condition

2019-02-02 Thread Mo Zhou
Package: octave Version: 4.4.1-4 Severity: grave X-Debbugs-CC: debian-scie...@lists.debian.org, ido...@neto.net.il Dear octave maintainer, I received an astonishing bug report[1] saying that MKL returns wrong result for matrix multiplication. However, my further investigation suggests that the pr